1
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Wang Y. Rendezvous with Vaccinia Virus in the Post-smallpox Era: R&D Advances. Viruses 2023; 15:1742. [PMID: 37632084 PMCID: PMC10457812 DOI: 10.3390/v15081742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/13/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
Smallpox was eradicated in less than 200 years after Edward Jenner's practice of cowpox variolation in 1796. The forty-three years of us living free of smallpox, beginning in 1979, never truly separated us from poxviruses. The recent outbreak of monkeypox in May 2022 might well warn us of the necessity of keeping up both the scientific research and public awareness of poxviruses. One of them in particular, the vaccinia virus (VACV), has been extensively studied as a vector given its broad host range, extraordinary thermal stability, and exceptional immunogenicity. Unceasing fundamental biological research on VACV provides us with a better understanding of its genetic elements, involvement in cellular signaling pathways, and modulation of host immune responses. This enables the rational design of safer and more efficacious next-generation vectors. To address the new technological advancement within the past decade in VACV research, this review covers the studies of viral immunomodulatory genes, modifications in commonly used vectors, novel mechanisms for rapid generation and purification of recombinant virus, and several other innovative approaches to studying its biology.
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Affiliation(s)
- Yuxiang Wang
- Vaccine Research Center, National Institutes of Health, 40 Convent Drive, Bethesda, MD 20892, USA
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2
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Kibler KV, Szczerba M, Lake D, Roeder AJ, Rahman M, Hogue BG, Roy Wong LY, Perlman S, Li Y, Jacobs BL. Intranasal Immunization with a Vaccinia Virus Vaccine Vector Expressing Pre-Fusion Stabilized SARS-CoV-2 Spike Fully Protected Mice against Lethal Challenge with the Heavily Mutated Mouse-Adapted SARS2-N501Y MA30 Strain of SARS-CoV-2. Vaccines (Basel) 2022; 10:vaccines10081172. [PMID: 35893821 PMCID: PMC9394475 DOI: 10.3390/vaccines10081172] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/13/2022] [Accepted: 07/18/2022] [Indexed: 11/24/2022] Open
Abstract
The Omicron SARS-CoV-2 variant has been designated as a variant of concern because its spike protein is heavily mutated. In particular, the Omicron spike is mutated at five positions (K417, N440, E484, Q493, and N501) that have been associated with escape from neutralizing antibodies induced by either infection with or immunization against the early Washington strain of SARS-CoV-2. The mouse-adapted strain of SARS-CoV-2, SARS2-N501YMA30, contains a spike that is also heavily mutated, with mutations at four of the five positions in the Omicron spike associated with neutralizing antibody escape (K417, E484, Q493, and N501). In this manuscript, we show that intranasal immunization with a pre-fusion stabilized Washington strain spike, expressed from a highly attenuated, replication-competent vaccinia virus construct, NYVAC-KC, fully protected mice against symptoms and death from SARS2-N501YMA30. Similarly, immunization by scarification on the skin fully protected against death, but not from mild disease. This data demonstrates that the Washington strain spike, when expressed from a highly attenuated, replication-competent poxvirus—administered without parenteral injection—can fully protect against the heavily mutated mouse-adapted SARS2-N501YMA30.
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Affiliation(s)
- Karen V. Kibler
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ 85287, USA; (M.S.); (M.R.); (B.G.H.); (Y.L.); (B.L.J.)
- Correspondence:
| | - Mateusz Szczerba
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ 85287, USA; (M.S.); (M.R.); (B.G.H.); (Y.L.); (B.L.J.)
| | - Douglas Lake
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (D.L.); (A.J.R.)
| | - Alexa J. Roeder
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (D.L.); (A.J.R.)
| | - Masmudur Rahman
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ 85287, USA; (M.S.); (M.R.); (B.G.H.); (Y.L.); (B.L.J.)
| | - Brenda G. Hogue
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ 85287, USA; (M.S.); (M.R.); (B.G.H.); (Y.L.); (B.L.J.)
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (D.L.); (A.J.R.)
| | - Lok-Yin Roy Wong
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA 52242, USA; (L.-Y.R.W.); (S.P.)
| | - Stanley Perlman
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA 52242, USA; (L.-Y.R.W.); (S.P.)
- Department of Pediatrics, University of Iowa, Iowa City, IA 52242, USA
| | - Yize Li
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ 85287, USA; (M.S.); (M.R.); (B.G.H.); (Y.L.); (B.L.J.)
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (D.L.); (A.J.R.)
| | - Bertram L. Jacobs
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ 85287, USA; (M.S.); (M.R.); (B.G.H.); (Y.L.); (B.L.J.)
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (D.L.); (A.J.R.)
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3
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Perdiguero B, Asbach B, Gómez CE, Köstler J, Barnett SW, Koutsoukos M, Weiss DE, Cristillo AD, Foulds KE, Roederer M, Montefiori DC, Yates NL, Ferrari G, Shen X, Sawant S, Tomaras GD, Sato A, Fulp WJ, Gottardo R, Ding S, Heeney JL, Pantaleo G, Esteban M, Wagner R. Early and Long-Term HIV-1 Immunogenicity Induced in Macaques by the Combined Administration of DNA, NYVAC and Env Protein-Based Vaccine Candidates: The AUP512 Study. Front Immunol 2022; 13:939627. [PMID: 35935978 PMCID: PMC9354927 DOI: 10.3389/fimmu.2022.939627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 06/23/2022] [Indexed: 11/13/2022] Open
Abstract
To control HIV infection there is a need for vaccines to induce broad, potent and long-term B and T cell immune responses. With the objective to accelerate and maintain the induction of substantial levels of HIV-1 Env-specific antibodies and, at the same time, to enhance balanced CD4 and CD8 T cell responses, we evaluated the effect of concurrent administration of MF59-adjuvanted Env protein together with DNA or NYVAC vectors at priming to establish if early administration of Env leads to early induction of antibody responses. The primary goal was to assess the immunogenicity endpoint at week 26. Secondary endpoints were (i) to determine the quality of responses with regard to RV144 correlates of protection and (ii) to explore a potential impact of two late boosts. In this study, five different prime/boost vaccination regimens were tested in rhesus macaques. Animals received priming immunizations with either NYVAC or DNA alone or in combination with Env protein, followed by NYVAC + protein or DNA + protein boosts. All regimens induced broad, polyfunctional and well-balanced CD4 and CD8 T cell responses, with DNA-primed regimens eliciting higher response rates and magnitudes than NYVAC-primed regimens. Very high plasma binding IgG titers including V1/V2 specific antibodies, modest antibody-dependent cellular cytotoxicity (ADCC) and moderate neutralization activity were observed. Of note, early administration of the MF59-adjuvanted Env protein in parallel with DNA priming leads to more rapid elicitation of humoral responses, without negatively affecting the cellular responses, while responses were rapidly boosted after repeated immunizations, indicating the induction of a robust memory response. In conclusion, our findings support the use of the Env protein component during priming in the context of an heterologous immunization regimen with a DNA and/or NYVAC vector as an optimized immunization protocol against HIV infection.
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Affiliation(s)
- Beatriz Perdiguero
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III (CIBERINFEC, ISCIII ), Madrid, Spain
| | - Benedikt Asbach
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Carmen E. Gómez
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III (CIBERINFEC, ISCIII ), Madrid, Spain
| | - Josef Köstler
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | | | - Marguerite Koutsoukos
- Department of Product Development, GlaxoSmithKline (GSK) Vaccines, Rixensart, Belgium
| | - Deborah E. Weiss
- Department of Immunobiology, Advanced BioScience Laboratories (ABL) Inc., Rockville, MD, United States
| | - Anthony D. Cristillo
- Department of Immunobiology, Advanced BioScience Laboratories (ABL) Inc., Rockville, MD, United States
| | - Kathryn E. Foulds
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Mario Roederer
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - David C. Montefiori
- Duke Human Vaccine Institute and Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Nicole L. Yates
- Duke Human Vaccine Institute and Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Guido Ferrari
- Duke Human Vaccine Institute and Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Xiaoying Shen
- Duke Human Vaccine Institute and Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Sheetal Sawant
- Duke Human Vaccine Institute and Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Georgia D. Tomaras
- Duke Human Vaccine Institute and Department of Surgery, Duke University Medical Center, Durham, NC, United States
| | - Alicia Sato
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - William J. Fulp
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
- Biomedical Data Sciences, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
- Translational Data Science, Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Song Ding
- EuroVacc Foundation EuroVacc Programme Coordinator, Lausanne, Switzerland
| | - Jonathan L. Heeney
- Lab of Viral Zoonotics, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Giuseppe Pantaleo
- Division of Immunology and Allergy, Department of Medicine, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland
| | - Mariano Esteban
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III (CIBERINFEC, ISCIII ), Madrid, Spain
- *Correspondence: Mariano Esteban, ; Ralf Wagner,
| | - Ralf Wagner
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
- *Correspondence: Mariano Esteban, ; Ralf Wagner,
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4
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Kibler KV, Szczerba M, Lake D, Roeder AJ, Rahman M, Hogue BG, Roy Wong LY, Perlman S, Li Y, Jacobs BL. Intranasal immunization with a vaccinia virus vaccine vector expressing pre-fusion stabilized SARS-CoV-2 spike fully protected mice against lethal challenge with the heavily mutated mouse-adapted SARS2-N501Y MA30 strain of SARS-CoV-2. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2021. [PMID: 34909775 DOI: 10.1101/2021.07.28.454201] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
The Omicron SARS-CoV-2 variant has been designated a variant of concern because its spike protein is heavily mutated. In particular, Omicron spike is mutated at 5 positions (K417, N440, E484, Q493 and N501) that have been associated with escape from neutralizing antibodies induced by either infection with or immunization against the early Washington strain of SARS-CoV-2. The mouse-adapted strain of SARS-CoV-2, SARS2-N501Y MA30 , contains a spike that is also heavily mutated, with mutations at 4 of the 5 positions in Omicron spike associated with neutralizing antibody escape (K417, E484, Q493 and N501). In this manuscript we show that intranasal immunization with a pre-fusion stabilized Washington strain spike, expressed from a highly attenuated, replication-competent vaccinia virus construct, NYVAC-KC, fully protected mice against disease and death from SARS2-N501Y MA30 . Similarly, immunization by scarification on the skin fully protected against death, but not from mild disease. This data demonstrates that Washington strain spike, when expressed from a highly attenuated, replication-competent poxvirus, administered without parenteral injection can fully protect against the heavily mutated mouse-adapted SARS2-N501Y MA30 .
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Affiliation(s)
- Karen V Kibler
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
| | - Mateusz Szczerba
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
| | - Douglas Lake
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Alexa J Roeder
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Masmudur Rahman
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
| | - Brenda G Hogue
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Lok-Yin Roy Wong
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Stanley Perlman
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, USA
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA
| | - Yize Li
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Bertram L Jacobs
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
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5
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Kibler KV, Szczerba M, Lake D, Roeder AJ, Rahman M, Hogue BG, Roy Wong LY, Perlman S, Li Y, Jacobs BL. Intranasal immunization with a vaccinia virus vaccine vector expressing pre-fusion stabilized SARS-CoV-2 spike fully protected mice against lethal challenge with the heavily mutated mouse-adapted SARS2-N501Y MA30 strain of SARS-CoV-2. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2021:2021.12.06.471483. [PMID: 34909775 PMCID: PMC8669842 DOI: 10.1101/2021.12.06.471483] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The Omicron SARS-CoV-2 variant has been designated a variant of concern because its spike protein is heavily mutated. In particular, Omicron spike is mutated at 5 positions (K417, N440, E484, Q493 and N501) that have been associated with escape from neutralizing antibodies induced by either infection with or immunization against the early Washington strain of SARS-CoV-2. The mouse-adapted strain of SARS-CoV-2, SARS2-N501Y MA30 , contains a spike that is also heavily mutated, with mutations at 4 of the 5 positions in Omicron spike associated with neutralizing antibody escape (K417, E484, Q493 and N501). In this manuscript we show that intranasal immunization with a pre-fusion stabilized Washington strain spike, expressed from a highly attenuated, replication-competent vaccinia virus construct, NYVAC-KC, fully protected mice against disease and death from SARS2-N501Y MA30 . Similarly, immunization by scarification on the skin fully protected against death, but not from mild disease. This data demonstrates that Washington strain spike, when expressed from a highly attenuated, replication-competent poxvirus, administered without parenteral injection can fully protect against the heavily mutated mouse-adapted SARS2-N501Y MA30 .
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Affiliation(s)
- Karen V. Kibler
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
| | - Mateusz Szczerba
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
| | - Douglas Lake
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Alexa J. Roeder
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Masmudur Rahman
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
| | - Brenda G. Hogue
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Lok-Yin Roy Wong
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Stanley Perlman
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, USA
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA
| | - Yize Li
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Bertram L. Jacobs
- Biodesign Center for Immunotherapy, Vaccines and Virotherapy, Arizona State University, Tempe, AZ, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
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6
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Malherbe DC, Vang L, Mendy J, Barnette PT, Spencer DA, Reed J, Kareko BW, Sather DN, Pandey S, Wibmer CK, Robins H, Fuller DH, Park B, Lakhashe SK, Wilson JM, Axthelm MK, Ruprecht RM, Moore PL, Sacha JB, Hessell AJ, Alexander J, Haigwood NL. Modified Adenovirus Prime-Protein Boost Clade C HIV Vaccine Strategy Results in Reduced Viral DNA in Blood and Tissues Following Tier 2 SHIV Challenge. Front Immunol 2021; 11:626464. [PMID: 33658998 PMCID: PMC7917243 DOI: 10.3389/fimmu.2020.626464] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 12/23/2020] [Indexed: 12/14/2022] Open
Abstract
Designing immunogens and improving delivery methods eliciting protective immunity is a paramount goal of HIV vaccine development. A comparative vaccine challenge study was performed in rhesus macaques using clade C HIV Envelope (Env) and SIV Gag antigens. One group was vaccinated using co-immunization with DNA Gag and Env expression plasmids cloned from a single timepoint and trimeric Env gp140 glycoprotein from one of these clones (DNA+Protein). The other group was a prime-boost regimen composed of two replicating simian (SAd7) adenovirus-vectored vaccines expressing Gag and one Env clone from the same timepoint as the DNA+Protein group paired with the same Env gp140 trimer (SAd7+Protein). The env genes were isolated from a single pre-peak neutralization timepoint approximately 1 year post infection in CAP257, an individual with a high degree of neutralization breadth. Both DNA+Protein and SAd7+Protein vaccine strategies elicited significant Env-specific T cell responses, lesser Gag-specific responses, and moderate frequencies of Env-specific TFH cells. Both vaccine modalities readily elicited systemic and mucosal Env-specific IgG but not IgA. There was a higher frequency and magnitude of ADCC activity in the SAd7+Protein than the DNA+Protein arm. All macaques developed moderate Tier 1 heterologous neutralizing antibodies, while neutralization of Tier 1B or Tier 2 viruses was sporadic and found primarily in macaques in the SAd7+Protein group. Neither vaccine approach provided significant protection from viral acquisition against repeated titered mucosal challenges with a heterologous Tier 2 clade C SHIV. However, lymphoid and gut tissues collected at necropsy showed that animals in both vaccine groups each had significantly lower copies of viral DNA in individual tissues compared to levels in controls. In the SAd7+Protein-vaccinated macaques, total and peak PBMC viral DNA were significantly lower compared with controls. Taken together, this heterologous Tier 2 SHIV challenge study shows that combination vaccination with SAd7+Protein was superior to combination DNA+Protein in reducing viral seeding in tissues in the absence of protection from infection, thus emphasizing the priming role of replication-competent SAd7 vector. Despite the absence of correlates of protection, because antibody responses were significantly higher in this vaccine group, we hypothesize that vaccine-elicited antibodies contribute to limiting tissue viral seeding.
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Affiliation(s)
- Delphine C Malherbe
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - Lo Vang
- Emergent BioSolutions, San Diego, CA, United States
| | - Jason Mendy
- Emergent BioSolutions, San Diego, CA, United States
| | - Philip T Barnette
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - David A Spencer
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - Jason Reed
- Vaccine & Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, United States
| | - Bettie W Kareko
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - D Noah Sather
- Department of Pediatrics, University of Washington, Seattle, WA, United States.,Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, United States
| | - Shilpi Pandey
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - Constantinos K Wibmer
- Centre for HIV and STIs, National Institute for Communicable Diseases, of the National Health Laboratory Service, Johannesburg, South Africa.,Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Harlan Robins
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Deborah H Fuller
- Department of Microbiology, University of Washington, Seattle, WA, United States
| | - Byung Park
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - Samir K Lakhashe
- Department of Virology and Immunology, Southwest National Primate Research Center, San Antonio, TX, United States.,Texas Biomedical Research Institute, San Antonio, TX, United States
| | - James M Wilson
- Gene Therapy Program, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Michael K Axthelm
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | - Ruth M Ruprecht
- Department of Virology and Immunology, Southwest National Primate Research Center, San Antonio, TX, United States.,Texas Biomedical Research Institute, San Antonio, TX, United States
| | - Penny L Moore
- Centre for HIV and STIs, National Institute for Communicable Diseases, of the National Health Laboratory Service, Johannesburg, South Africa.,Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.,Division of Medical Virology, Department of Pathology, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Jonah B Sacha
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States.,Vaccine & Gene Therapy Institute, Oregon Health & Science University, Beaverton, OR, United States.,Molecular Microbiology and Immunology, School of Medicine, Oregon Health & Science University, Portland, OR, United States
| | - Ann J Hessell
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States
| | | | - Nancy L Haigwood
- Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, United States.,Molecular Microbiology and Immunology, School of Medicine, Oregon Health & Science University, Portland, OR, United States
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7
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Lévy Y, Lacabaratz C, Ellefsen-Lavoie K, Stöhr W, Lelièvre JD, Bart PA, Launay O, Weber J, Salzberger B, Wiedemann A, Surenaud M, Koelle DM, Wolf H, Wagner R, Rieux V, Montefiori DC, Yates NL, Tomaras GD, Gottardo R, Mayer B, Ding S, Thiébaut R, McCormack S, Chêne G, Pantaleo G. Optimal priming of poxvirus vector (NYVAC)-based HIV vaccine regimens for T cell responses requires three DNA injections. Results of the randomized multicentre EV03/ANRS VAC20 Phase I/II Trial. PLoS Pathog 2020; 16:e1008522. [PMID: 32589686 PMCID: PMC7319597 DOI: 10.1371/journal.ppat.1008522] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 04/06/2020] [Indexed: 12/22/2022] Open
Abstract
DNA vectors have been widely used as a priming of poxvirus vaccine in prime/boost regimens. Whether the number of DNA impacts qualitatively or quantitatively the immune response is not fully explored. With the aim to reinforce T-cell responses by optimizing the prime-boost regimen, the multicentric EV03/ANRS VAC20 phase I/II trial, randomized 147 HIV-negative volunteers to either 3xDNA plus 1xNYVAC (weeks 0, 4, 8 plus 24; n = 74) or to 2xDNA plus 2xNYVAC (weeks 0, 4 plus 20, 24; n = 73) groups. T-cell responses (IFN-γ ELISPOT) to at least one peptide pool were higher in the 3xDNA than the 2xDNA groups (91% and 80% of vaccinees) (P = 0.049). In the 3xDNA arm, 26 (37%) recipients developed a broader T-cell response (Env plus at least to one of the Gag, Pol, Nef pools) than in the 2xDNA (15; 22%) arms (primary endpoint; P = 0.047) with a higher magnitude against Env (at week 26) (P<0.001). In both groups, vaccine regimens induced HIV-specific polyfunctional CD4 and CD8 T cells and the production of Th1, Th2 and Th17/IL-21 cytokines. Antibody responses were also elicited in up to 81% of vaccines. A higher percentage of IgG responders was noted in the 2xDNA arm compared to the 3xDNA arm, while the 3xDNA group tended to elicit a higher magnitude of IgG3 response against specific Env antigens. We show here that the modulation of the prime strategy, without modifying the route or the dose of administration, or the combination of vectors, may influence the quality of the responses. Development of a safe and effective HIV-1 vaccine would undoubtedly be the best solution for the ultimate control of the worldwide AIDS pandemic. To date, only one large phase III trial (RV144 Thai study) showed a partial and modest protection against HIV infection. This result raised hope in the field and encouraged the development of vaccines or strategies in order to improve vaccine efficacy. Several vaccine strategies designed to elicit broad HIV-specific T cells and/or neutralizing antibodies to prevent HIV-1 transmission are under evaluation. Among diverse candidate vaccines, the safety and immunogenicity of multi-gene DNA-based and Pox-virus derived vaccines have been evaluated in several clinical studies. The present study was designed to optimize the combination of these two vaccines with the aim of determining the optimal number of DNA primes for a poxvirus-based HIV vaccine regimen. We show here that the prime boost combination is highly immunogenic and that the number of DNA primes induces differentially T cell and antibody responses. A better priming of poxvirus-based vaccine regimens for T cells is obtained with 3 DNA injections. Our results contribute and extend data of several preclinical studies pointing out the potential interest of DNA as a prime capable not only of improving immune responses but also of imprinting the long-term responses to boost vaccines.
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Affiliation(s)
- Yves Lévy
- Vaccine Research Institute, Université Paris-Est Créteil, Faculté de Médecine, INSERM U955, équipe 16, Créteil, France
- Assistance Publique-Hôpitaux de Paris, Groupe Henri-Mondor Albert-Chenevier, Service d’Immunologie Clinique, Créteil, France
- * E-mail:
| | - Christine Lacabaratz
- Vaccine Research Institute, Université Paris-Est Créteil, Faculté de Médecine, INSERM U955, équipe 16, Créteil, France
| | | | | | - Jean-Daniel Lelièvre
- Vaccine Research Institute, Université Paris-Est Créteil, Faculté de Médecine, INSERM U955, équipe 16, Créteil, France
- Assistance Publique-Hôpitaux de Paris, Groupe Henri-Mondor Albert-Chenevier, Service d’Immunologie Clinique, Créteil, France
| | | | - Odile Launay
- Université de Paris, Faculté de médecine Paris Descartes; Inserm, CIC 1417, F-CRIN I-REIVAC; Assistance Publique-Hôpitaux de Paris, CIC Cochin Pasteur, Paris, France
| | | | - Bernd Salzberger
- University Hospital, Institute of Clinical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Aurélie Wiedemann
- Vaccine Research Institute, Université Paris-Est Créteil, Faculté de Médecine, INSERM U955, équipe 16, Créteil, France
| | - Mathieu Surenaud
- Vaccine Research Institute, Université Paris-Est Créteil, Faculté de Médecine, INSERM U955, équipe 16, Créteil, France
| | - David M. Koelle
- Department of Medicine & Department of Global Health, University of Washington, Fred Hutchinson Cancer Research Center Seattle, Washington, United States of America
| | - Hans Wolf
- University Hospital, Institute of Clinical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Ralf Wagner
- University Hospital, Institute of Clinical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Véronique Rieux
- Vaccine Research Institute, Université Paris-Est Créteil, Faculté de Médecine, INSERM U955, équipe 16, Créteil, France
- ANRS, Paris, France
| | - David C. Montefiori
- Department of Surgery, Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Nicole L. Yates
- Department of Surgery, Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Georgia D. Tomaras
- Department of Surgery, Duke Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Bryan Mayer
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Song Ding
- EuroVacc Foundation, Lausanne, Switzerland
| | - Rodolphe Thiébaut
- Inserm, Bordeaux Population Health Research Center, UMR 1219, University Bordeaux, ISPED, CIC 1401-EC, Univ Bordeaux, Bordeaux, France
- CHU de Bordeaux, pôle de santé publique, Bordeaux, France
- INRIA SISTM, Talence, France
| | | | - Geneviève Chêne
- Inserm, Bordeaux Population Health Research Center, UMR 1219, University Bordeaux, ISPED, CIC 1401-EC, Univ Bordeaux, Bordeaux, France
- CHU de Bordeaux, pôle de santé publique, Bordeaux, France
| | - Giuseppe Pantaleo
- Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
- Swiss Vaccine Research Institute, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
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8
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Repair of a previously uncharacterized second host-range gene contributes to full replication of modified vaccinia virus Ankara (MVA) in human cells. Proc Natl Acad Sci U S A 2020; 117:3759-3767. [PMID: 32019881 DOI: 10.1073/pnas.1921098117] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Modified vaccinia virus Ankara (MVA), a widely used vaccine vector for expression of genes of unrelated pathogens, is safe, immunogenic, and can incorporate large amounts of added DNA. MVA was derived by extensively passaging the chorioallantois vaccinia virus Ankara (CVA) vaccine strain in chicken embryo fibroblasts during which numerous mutations and deletions occurred with loss of replicative ability in most mammalian cells. Restoration of the deleted C12L gene, encoding serine protease inhibitor 1, enhances replication of MVA in human MRC-5 cells but only slightly in other human cells. Here we show that repair of the inactivated C16L/B22R gene of MVA enhances replication in numerous human cell lines. This previously uncharacterized gene is present at both ends of the genome of many orthopoxviruses and is highly conserved in most, including smallpox and monkeypox viruses. The C16L/B22R gene is expressed early in infection from the second methionine of the previously annotated Copenhagen strain open reading frame (ORF) as a 17.4-kDa protein. The C16/B22 and C12 proteins together promote MVA replication in human cells to levels that are comparable to titers in chicken embryo fibroblasts. Both proteins enhance virion assembly, but C16/B22 increases proteolytic processing of core proteins in A549 cells consistent with higher infectious virus titers. Furthermore, human A549 cells expressing codon-optimized C16L/B22R and C12L genes support higher levels of MVA replication than cell lines expressing neither or either alone. Identification of the genes responsible for the host-range defect of MVA may allow more rational engineering of vaccines for efficacy, safety, and propagation.
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9
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Giel-Moloney M, Esteban M, Oakes BH, Vaine M, Asbach B, Wagner R, Mize GJ, Spies AG, McElrath J, Perreau M, Roger T, Ives A, Calandra T, Weiss D, Perdiguero B, Kibler KV, Jacobs B, Ding S, Tomaras GD, Montefiori DC, Ferrari G, Yates NL, Roederer M, Kao SF, Foulds KE, Mayer BT, Bennett C, Gottardo R, Parrington M, Tartaglia J, Phogat S, Pantaleo G, Kleanthous H, Pugachev KV. Recombinant HIV-1 vaccine candidates based on replication-defective flavivirus vector. Sci Rep 2019; 9:20005. [PMID: 31882800 PMCID: PMC6934588 DOI: 10.1038/s41598-019-56550-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/13/2019] [Indexed: 12/21/2022] Open
Abstract
Multiple approaches utilizing viral and DNA vectors have shown promise in the development of an effective vaccine against HIV. In this study, an alternative replication-defective flavivirus vector, RepliVax (RV), was evaluated for the delivery of HIV-1 immunogens. Recombinant RV-HIV viruses were engineered to stably express clade C virus Gag and Env (gp120TM) proteins and propagated in Vero helper cells. RV-based vectors enabled efficient expression and correct maturation of Gag and gp120TM proteins, were apathogenic in a sensitive suckling mouse neurovirulence test, and were similar in immunogenicity to recombinant poxvirus NYVAC-HIV vectors in homologous or heterologous prime-boost combinations in mice. In a pilot NHP study, immunogenicity of RV-HIV viruses used as a prime or boost for DNA or NYVAC candidates was compared to a DNA prime/NYVAC boost benchmark scheme when administered together with adjuvanted gp120 protein. Similar neutralizing antibody titers, binding IgG titers measured against a broad panel of Env and Gag antigens, and ADCC responses were observed in the groups throughout the course of the study, and T cell responses were elicited. The entire data demonstrate that RV vectors have the potential as novel HIV-1 vaccine components for use in combination with other promising candidates to develop new effective vaccination strategies.
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Affiliation(s)
| | - M Esteban
- Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - B H Oakes
- Sanofi Pasteur, Cambridge, MA, 02139, USA
| | - M Vaine
- Sanofi Pasteur, Cambridge, MA, 02139, USA
| | - B Asbach
- University of Regensburg (UREG), Institute of Medical Microbiology and Hygiene, 93053, Regensburg, Germany
| | - R Wagner
- University of Regensburg (UREG), Institute of Medical Microbiology and Hygiene, 93053, Regensburg, Germany
- University Hospital Regensburg, Institute of Clinical Microbiology and Hygiene, 93053, Regensburg, Germany
| | - G J Mize
- Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, 98109, USA
| | - A G Spies
- Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, 98109, USA
| | - J McElrath
- Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, 98109, USA
| | - M Perreau
- Service of Immunology and Allergy, Department of Medicine, Lausanne University Hospital, 1011, Lausanne, Switzerland
| | - T Roger
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, 1011, Lausanne, Switzerland
| | - A Ives
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, 1011, Lausanne, Switzerland
| | - T Calandra
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, 1011, Lausanne, Switzerland
| | - D Weiss
- Bioqual Inc, Rockville, Maryland, 20850, USA
| | - B Perdiguero
- Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - K V Kibler
- Arizona State University (ASU), Tucson, AZ, 85745, USA
| | - B Jacobs
- Arizona State University (ASU), Tucson, AZ, 85745, USA
| | - S Ding
- EuroVacc, Amsterdam, The Netherlands
| | - G D Tomaras
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - D C Montefiori
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - G Ferrari
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - N L Yates
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - M Roederer
- Vaccine Research Center, NIAID, NIH, Bethesda, MD, 20892, USA
| | - S F Kao
- Vaccine Research Center, NIAID, NIH, Bethesda, MD, 20892, USA
| | - K E Foulds
- Vaccine Research Center, NIAID, NIH, Bethesda, MD, 20892, USA
| | - B T Mayer
- Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, 98109, USA
| | - C Bennett
- Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, 98109, USA
| | - R Gottardo
- Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, 98109, USA
| | | | | | - S Phogat
- Sanofi Pasteur, Cambridge, MA, 02139, USA
| | - G Pantaleo
- Service of Immunology and Allergy, Department of Medicine, Lausanne University Hospital, 1011, Lausanne, Switzerland
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10
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Perdiguero B, Gómez CE, García-Arriaza J, Sánchez-Corzo C, Sorzano CÓS, Wilmschen S, von Laer D, Asbach B, Schmalzl C, Peterhoff D, Ding S, Wagner R, Kimpel J, Levy Y, Pantaleo G, Esteban M. Heterologous Combination of VSV-GP and NYVAC Vectors Expressing HIV-1 Trimeric gp145 Env as Vaccination Strategy to Induce Balanced B and T Cell Immune Responses. Front Immunol 2019; 10:2941. [PMID: 31921191 PMCID: PMC6930178 DOI: 10.3389/fimmu.2019.02941] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 11/29/2019] [Indexed: 01/03/2023] Open
Abstract
The generation of a vaccine against HIV-1 able to induce durable protective immunity continues a major challenge. The modest efficacy (31.2%) of the phase III RV144 clinical trial provided the first demonstration that a prophylactic HIV/AIDS vaccine is achievable but emphasized the need for further refinements of vaccine candidates, formulations, and immunization regimens. Here, we analyzed in mice the immunogenicity profile elicited by different homologous and heterologous prime/boost combinations using the modified rhabdovirus VSV-GP combined with DNA or poxviral NYVAC vectors, all expressing trimeric membrane-bound Env (gp145) of HIV-1 96ZM651 clade C, with or without purified gp140 protein component. In cultured cells infected with recombinant VSV-GP or NYVAC viruses, gp145 epitopes at the plasma membrane were recognized by human HIV-1 broadly neutralizing antibodies (bNAbs). In immunized mice, the heterologous combination of VSV-GP and NYVAC recombinant vectors improved the induction of HIV-1 Env-specific humoral and cellular immune responses compared to homologous prime/boost protocols. Specifically, the combination of VSV-GP in the prime and NYVAC in the boost induced higher HIV-1 Env-specific T cell (CD4/CD8 T cells and T follicular helper -Tfh- cells) immune responses compared to the use of DNA or NYVAC vectors in the prime and VSV-GP in the boost. Such enhanced T cell responses correlated with an enhancement of the Env-specific germinal center (GC) B cell population and with a heavily biased Env-specific response toward the Th1-associated IgG2a and IgG3 subclasses, while the other groups showed a Th2-associated IgG1 bias. In summary, our T and B cell population data demonstrated that VSV-GP-based vectors could be taken into consideration as an optimized immunogenic HIV-1 vaccine candidate component against HIV-1 when used for priming in heterologous combinations with the poxvirus vector NYVAC as a boost.
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Affiliation(s)
- Beatriz Perdiguero
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Carmen Elena Gómez
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Juan García-Arriaza
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Cristina Sánchez-Corzo
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Carlos Óscar S Sorzano
- Biocomputing Unit and Computational Genomics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Sarah Wilmschen
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Dorothee von Laer
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Benedikt Asbach
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Christina Schmalzl
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - David Peterhoff
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Song Ding
- EuroVacc Foundation, Amsterdam, Netherlands
| | - Ralf Wagner
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany.,Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Janine Kimpel
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Yves Levy
- Vaccine Research Institute, Créteil, France.,INSERM U955, Paris Est Créteil University, Créteil, France.,AP-HP, Hôpital Henri-Mondor Albert-Chenevier, Service d'Immunologie Clinique et Maladies Infectieuses, Créteil, France
| | - Giuseppe Pantaleo
- Division of Immunology and Allergy, Department of Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Mariano Esteban
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
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11
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Wilmschen S, Schmitz JE, Kimpel J. Viral Vectors for the Induction of Broadly Neutralizing Antibodies against HIV. Vaccines (Basel) 2019; 7:vaccines7030119. [PMID: 31546894 PMCID: PMC6789710 DOI: 10.3390/vaccines7030119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/12/2019] [Accepted: 09/16/2019] [Indexed: 01/10/2023] Open
Abstract
Extensive research on generating an efficient HIV vaccine is ongoing. A major aim of HIV vaccines is the induction of long-lasting, broadly neutralizing antibodies (bnAbs) that can confer sterile immunity for a prolonged period of time. Several strategies have been explored to reach this goal, i.e. protein immunization, DNA, or viral vectors, or a combination thereof. In this review, we give an overview of approaches using viral vectors for the induction of HIV-specific bnAbs. Many pre-clinical studies were performed using various replication-competent and -incompetent vectors. Amongst them, poxviral and adenoviral vectors were the most prevalent ones. In many studies, viral vectors were combined with a DNA prime or a protein boost. However, neutralizing antibodies were mainly induced against the homologous HIV-1 vaccine strain or tier 1 viruses, and in rare cases, against tier 2 viruses, indicating the need for improved antigens and vaccination strategies. Furthermore, we also review next generation Env antigens that are currently being used in protein vaccination approaches and point out how they could be utilized in viral vectors.
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Affiliation(s)
- Sarah Wilmschen
- Division of Virology, Medical University of Innsbruck, Innsbruck 6020, Austria
| | - Joern E Schmitz
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Janine Kimpel
- Division of Virology, Medical University of Innsbruck, Innsbruck 6020, Austria.
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12
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Affiliation(s)
| | - Jerome H. Kim
- International Vaccine Institute, Seoul, Republic of Korea
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13
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A Novel MVA-Based HIV Vaccine Candidate (MVA-gp145-GPN) Co-Expressing Clade C Membrane-Bound Trimeric gp145 Env and Gag-Induced Virus-Like Particles (VLPs) Triggered Broad and Multifunctional HIV-1-Specific T Cell and Antibody Responses. Viruses 2019; 11:v11020160. [PMID: 30781504 PMCID: PMC6410222 DOI: 10.3390/v11020160] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 12/17/2022] Open
Abstract
The development of an effective Human Immunodeficiency Virus (HIV) vaccine that is able to stimulate both the humoral and cellular HIV-1-specific immune responses remains a major priority challenge. In this study, we described the generation and preclinical evaluation of single and double modified vaccinia virus Ankara (MVA)-based candidates expressing the HIV-1 clade C membrane-bound gp145(ZM96) trimeric protein and/or the Gag(ZM96)-Pol-Nef(CN54) (GPN) polyprotein that was processed to form Gag-induced virus-like particles (VLPs). In vitro characterization of MVA recombinants revealed the stable integration of HIV-1 genes without affecting its replication capacity. In cells that were infected with Env-expressing viruses, the gp145 protein was inserted into the plasma membrane exposing critical epitopes that were recognized by broadly neutralizing antibodies (bNAbs), whereas Gag-induced VLPs were released from cells that were infected with GPN-expressing viruses. VLP particles as well as purified MVA virions contain Env and Gag visualized by immunoelectron microscopy and western-blot of fractions that were obtained after detergent treatments of purified virus particles. In BALB/c mice, homologous MVA-gp145-GPN prime/boost regimen induced broad and polyfunctional Env- and Gag-specific CD4 T cells and antigen-specific T follicular helper (Tfh) and Germinal Center (GC) B cells, which correlated with robust HIV-1-specific humoral responses. Overall, these results support the consideration of MVA-gp145-GPN vector as a potential vaccine candidate against HIV-1.
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14
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Priming with a Potent HIV-1 DNA Vaccine Frames the Quality of Immune Responses prior to a Poxvirus and Protein Boost. J Virol 2019; 93:JVI.01529-18. [PMID: 30429343 DOI: 10.1128/jvi.01529-18] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 10/31/2018] [Indexed: 12/18/2022] Open
Abstract
The use of heterologous immunization regimens and improved vector systems has led to increases in immunogenicity of HIV-1 vaccine candidates in nonhuman primates. In order to resolve interrelations between different delivery modalities, three different poxvirus boost regimens were compared. Three groups of rhesus macaques were each primed with the same DNA vaccine encoding Gag, Pol, Nef, and gp140. The groups were then boosted with either the vaccinia virus strain NYVAC or a variant with improved replication competence in human cells, termed NYVAC-KC. The latter was administered either by scarification or intramuscularly. Finally, macaques were boosted with adjuvanted gp120 protein to enhance humoral responses. The regimen elicited very potent CD4+ and CD8+ T cell responses in a well-balanced manner, peaking 2 weeks after the boost. T cells were broadly reactive and polyfunctional. All animals exhibited antigen-specific humoral responses already after the poxvirus boost, which further increased following protein administration. Polyclonal reactivity of IgG antibodies was highest against HIV-1 clade C Env proteins, with considerable cross-reactivity to other clades. Substantial effector functional activities (antibody-dependent cell-mediated cytotoxicity and antibody-dependent cell-mediated virus inhibition) were observed in serum obtained after the last protein boost. Notably, major differences between the groups were absent, indicating that the potent priming induced by the DNA vaccine initially framed the immune responses in such a way that the subsequent boosts with NYVAC and protein led only to an increase in the response magnitudes without skewing the quality. This study highlights the importance of selecting the best combination of vector systems in heterologous prime-boost vaccination regimens.IMPORTANCE The evaluation of HIV vaccine efficacy trials indicates that protection would most likely correlate with a polyfunctional immune response involving several effector functions from all arms of the immune system. Heterologous prime-boost regimens have been shown to elicit vigorous T cell and antibody responses in nonhuman primates that, however, qualitatively and quantitatively differ depending on the respective vector systems used. The present study evaluated a DNA prime and poxvirus and protein boost regimen and compared how two poxvirus vectors with various degrees of replication capacity and two different delivery modalities-conventional intramuscular delivery and percutaneous delivery by scarification-impact several immune effectors. It was found that despite the different poxvirus boosts, the overall immune responses in the three groups were similar, suggesting the potent DNA priming as the major determining factor of immune responses. These findings emphasize the importance of selecting optimal priming agents in heterologous prime-boost vaccination settings.
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