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Hanke T. Aiming for protective T-cell responses: a focus on the first generation conserved-region HIVconsv vaccines in preventive and therapeutic clinical trials. Expert Rev Vaccines 2019; 18:1029-1041. [PMID: 31613649 DOI: 10.1080/14760584.2019.1675518] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Introduction: Despite life-saving antiretroviral drugs, an effective HIV-1 vaccine is the best solution and likely a necessary component of any strategy for halting the AIDS epidemic. The currently prevailing aim is to pursue antibody-mediated vaccine protection. With ample evidence for the ability of T cells to control HIV-1 replication, their protective potential should be also harnessed by vaccination. The challenge is to elicit not just any, but protective T cells.Areas covered: This article reviews the clinical experience with the first-generation conserved-region immunogen HIVconsv delivered by combinations of plasmid DNA, simian adenovirus, and poxvirus MVA. The aim of our strategy is to induce strong and broad T cells targeting functionally important parts of HIV-1 proteins common to global variants. These vaccines were tested in eight phase 1/2 preventive and therapeutic clinical trials in Europe and Africa, and induced high frequencies of broadly specific CD8+ T cells capable of in vitro inhibition of four major HIV-1 clades A, B, C and D, and in combination with latency-reactivating agent provided a signal of drug-free virological control in early treated patients.Expert opinion: A number of critical T-cell traits have to come together at the same time to achieve control over HIV-1.
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Affiliation(s)
- Tomáš Hanke
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK.,International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
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Wee EG, Moyo NA, Saunders KO, LaBranche C, Donati F, Capucci S, Parks R, Borthwick N, Hannoun Z, Montefiori DC, Haynes BF, Hanke T. Parallel Induction of CH505 B Cell Ontogeny-Guided Neutralizing Antibodies and tHIVconsvX Conserved Mosaic-Specific T Cells against HIV-1. Mol Ther Methods Clin Dev 2019; 14:148-160. [PMID: 31367651 PMCID: PMC6657236 DOI: 10.1016/j.omtm.2019.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 06/18/2019] [Indexed: 12/04/2022]
Abstract
The aim of this work was to start collecting information on rational combination of antibody (Ab) and T cell vaccines into single regimens. Two promising candidate HIV-1 vaccine strategies, sequential isolates of CH505 virus Envs developed for initiation of broadly neutralizing antibody lineages and conserved-mosaic tHIVconsvX immunogens aiming to induce effective cross-clade T cell responses, were combined to assess vaccine interactions. These immunogens were delivered in heterologous vector/modality regimens consisting of non-replicating simian (chimpanzee) adenovirus ChAdOx1 (C), non-replicating poxvirus MVA (M), and adjuvanted protein (P). Outbred CD1-SWISS mice were vaccinated intramuscularly using either parallel CM8M (tHIVconsvX)/CPPP (CH505) or sequential CM16M (tHIVconsvX)/CPPP (CH505) protocols, the latter of which delivered T cell CM prior to the CH505 Env. CM8M (tHIVconsvX) and CPPP or CMMP (CH505) vaccinations alone were included as comparators. The vaccine-elicited HIV-1-specific trimer-binding and neutralizing Abs and CD8+/CD4+ T cell responses induced by the combined and comparator regimens were not statistically separable among regimens. The Ab-lineage immunogen strategy was particularly suited for combined regimens for its likely less potent induction of Env-specific T cell responses relative to homologous epitope-based vaccine strategies. These results inform design of the first rationally combined Ab and T cell vaccine regimens in human volunteers.
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Affiliation(s)
- Edmund G. Wee
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Nathifa A. Moyo
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Kevin O. Saunders
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Celia LaBranche
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA
| | - Filippo Donati
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Silvia Capucci
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Robert Parks
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Nicola Borthwick
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Zara Hannoun
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - David C. Montefiori
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA
| | - Barton F. Haynes
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC 27710, USA
- Department of Medicine and Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Tomáš Hanke
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
- International Research Center for Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
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Moyo N, Vogel AB, Buus S, Erbar S, Wee EG, Sahin U, Hanke T. Efficient Induction of T Cells against Conserved HIV-1 Regions by Mosaic Vaccines Delivered as Self-Amplifying mRNA. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2018; 12:32-46. [PMID: 30547051 PMCID: PMC6258890 DOI: 10.1016/j.omtm.2018.10.010] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 10/21/2018] [Indexed: 12/20/2022]
Abstract
Focusing T cell responses on the most vulnerable parts of HIV-1, the functionally conserved regions of HIV-1 proteins, is likely a key prerequisite for vaccine success. For a T cell vaccine to efficiently control HIV-1 replication, the vaccine-elicited individual CD8+ T cells and as a population have to display a number of critical traits. If any one of these traits is suboptimal, the vaccine is likely to fail. Fine-tuning of individual protective characteristics of T cells will require iterative stepwise improvements in clinical trials. Although the second-generation tHIVconsvX immunogens direct CD8+ T cells to predominantly protective and conserved epitopes, in the present work, we have used formulated self-amplifying mRNA (saRNA) to deliver tHIVconsvX to the immune system. We demonstrated in BALB/c and outbred mice that regimens employing saRNA vaccines induced broadly specific, plurifunctional CD8+ and CD4+ T cells, which displayed structured memory subpopulations and were maintained at relatively high frequencies over at least 22 weeks post-administration. This is one of the first thorough analyses of mRNA vaccine-elicited T cell responses. The combination of tHIVconsvX immunogens and the highly versatile and easily manufacturable saRNA platform may provide a long-awaited opportunity to define and optimize induction of truly protective CD8+ T cell parameters in human volunteers.
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Affiliation(s)
- Nathifa Moyo
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Annette B Vogel
- Biopharmaceutical New Technologies (BioNTech) Corporation, Mainz 55131, Germany
| | - Søren Buus
- Department of Immunology and Microbiology, University of Copenhagen, Copenhagen 2200, Denmark
| | - Stephanie Erbar
- Biopharmaceutical New Technologies (BioNTech) Corporation, Mainz 55131, Germany
| | - Edmund G Wee
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - Ugur Sahin
- Biopharmaceutical New Technologies (BioNTech) Corporation, Mainz 55131, Germany
| | - Tomáš Hanke
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, UK.,International Research Center for Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
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Capucci S, Wee EG, Schiffner T, LaBranche CC, Borthwick N, Cupo A, Dodd J, Dean H, Sattentau Q, Montefiori D, Klasse PJ, Sanders RW, Moore JP, Hanke T. HIV-1-neutralizing antibody induced by simian adenovirus- and poxvirus MVA-vectored BG505 native-like envelope trimers. PLoS One 2017; 12:e0181886. [PMID: 28792942 PMCID: PMC5549892 DOI: 10.1371/journal.pone.0181886] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 07/07/2017] [Indexed: 01/12/2023] Open
Abstract
Rabbits and monkeys immunized with HIV type 1 (HIV-1) native-like BG505 SOSIP.664 (BG505s) glycoprotein trimers are known to induce antibodies that can neutralize the autologous tier-2 virus. Here, we assessed the induction of HIV-1 trimer binding and neutralizing antibody (nAb) titres when BG505s trimers were also delivered by non-replicating simian (chimpanzee) adenovirus and non-replicating poxvirus modified vaccinia virus Ankara (MVA) vaccine vectors. First, we showed that approximately two-thirds and one-third of the trimers secreted from the ChAdOx1.BG505s (C) and MVA.BG505s (M) vaccine-infected cells, respectively, were cleaved and in a native-like conformation. Rabbits were immunized intramuscularly with these vaccine vectors and in some cases boosted with ISCOMATRIX™-adjuvanted BG505s protein trimer (P), using CCC, MMM, PPP, CPP, MPP and CMP vaccine regimens. We found that the peak trimer-binding antibody and tier-1A and autologous tier-2 nAb responses induced by the CC, CM, PPP, CPP, MPP and CMP regimens were comparable, although only PPP induced autologous tier-2 nAbs in all the immunized animals. Three animals developed weak heterologous tier-2 nAbs. These results demonstrate that ChAdOx1 and MVA vectors are useful delivery modalities for not only T-cell, but also antibody vaccine development.
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Affiliation(s)
- Silvia Capucci
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Edmund G. Wee
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Torben Schiffner
- The Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Celia C. LaBranche
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Nicola Borthwick
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
| | - Albert Cupo
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York, United States of America
| | - Jonathan Dodd
- The Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Hansi Dean
- The International AIDS Vaccine Initiative, New York, New York, United States of America
| | - Quentin Sattentau
- The Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - David Montefiori
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Per J. Klasse
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York, United States of America
| | - Rogier W. Sanders
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York, United States of America
- Department of Medical Microbiology, University of Amsterdam, Amsterdam, the Netherlands
| | - John P. Moore
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York, United States of America
| | - Tomáš Hanke
- The Jenner Institute, University of Oxford, Oxford, United Kingdom
- International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
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Interference of retroviral envelope with vaccine-induced CD8 + T cell responses is relieved by co-administration of cytokine-encoding vectors. Retrovirology 2017; 14:28. [PMID: 28449719 PMCID: PMC5408827 DOI: 10.1186/s12977-017-0352-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 04/20/2017] [Indexed: 11/13/2022] Open
Abstract
Background Retroviral envelope (Env) proteins are known to exhibit immunosuppressive properties, which become apparent not only in retroviral infections, but also in gene-based immunizations using retroviral immunogens, where envelope interferes with the induction of CD8+ T cell responses towards another, simultaneously or subsequently delivered, immunogen. Results In the Friend retrovirus mouse model, immunization with a plasmid encoding the Friend murine leukemia virus (F-MuLV) Leader-Gag protein resulted in induction of a strong GagL85–93-specific CD8+ T cell response, while the response was completely abrogated by co-immunization with an F-MuLV Env-encoding plasmid. In order to overcome this interference of retroviral envelope, we employed plasmids encoding the cytokines interleukin (IL) 1β, IL2, IL12, IL15, IL21, IL28A or granulocyte–macrophage colony-stimulating factor (GM-CSF) as genetic adjuvants. Co-application of plasmids encoding IL2, IL12, IL21, IL28A and especially GM-CSF rescued the induction of GagL85–93-specific CD8+ T cells in mice vaccinated with FV Leader-Gag and Env. Mice that were immunized with plasmids encoding Leader-Gag and Env and the cytokines IL1β, IL12, IL15, IL28A or GM-CSF, but not Leader-Gag and Env without any cytokine, showed significantly reduced viral loads upon a high-dose Friend virus challenge infection. Conclusions Our data demonstrate the potency of cytokine-encoding vectors as adjuvants and immune modulators in composite vaccines for anti-retroviral immunization. Electronic supplementary material The online version of this article (doi:10.1186/s12977-017-0352-7) contains supplementary material, which is available to authorized users.
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Kaulfuß M, Wensing I, Windmann S, Hrycak CP, Bayer W. Induction of complex immune responses and strong protection against retrovirus challenge by adenovirus-based immunization depends on the order of vaccine delivery. Retrovirology 2017; 14:8. [PMID: 28166802 PMCID: PMC5294899 DOI: 10.1186/s12977-017-0336-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 01/31/2017] [Indexed: 01/04/2023] Open
Abstract
Background In the Friend retrovirus mouse model we developed potent adenovirus-based vaccines that were designed to induce either strong Friend virus GagL85–93-specific CD8+ T cell or antibody responses, respectively. To optimize the immunization outcome we evaluated vaccination strategies using combinations of these vaccines. Results While the vaccines on their own confer strong protection from a subsequent Friend virus challenge, the simple combination of the vaccines for the establishment of an optimized immunization protocol did not result in a further improvement of vaccine effectivity. We demonstrate that the co-immunization with GagL85–93/leader-gag encoding vectors together with envelope-encoding vectors abrogates the induction of GagL85–93-specific CD8+ T cells, and in successive immunization protocols the immunization with the GagL85–93/leader-gag encoding vector had to precede the immunization with an envelope encoding vector for the efficient induction of GagL85–93-specific CD8+ T cells. Importantly, the antibody response to envelope was in fact enhanced when the mice were adenovirus-experienced from a prior immunization, highlighting the expedience of this approach. Conclusions To circumvent the immunosuppressive effect of envelope on immune responses to simultaneously or subsequently administered immunogens, we developed a two immunizations-based vaccination protocol that induces strong immune responses and confers robust protection of highly Friend virus-susceptible mice from a lethal Friend virus challenge. Electronic supplementary material The online version of this article (doi:10.1186/s12977-017-0336-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Meike Kaulfuß
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, Virchowstr. 179, 45147, Essen, Germany
| | - Ina Wensing
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, Virchowstr. 179, 45147, Essen, Germany
| | - Sonja Windmann
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, Virchowstr. 179, 45147, Essen, Germany
| | - Camilla Patrizia Hrycak
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, Virchowstr. 179, 45147, Essen, Germany
| | - Wibke Bayer
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, Virchowstr. 179, 45147, Essen, Germany.
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Abstract
A globally effective vaccine strategy must cope with the broad genetic diversity of HIV and contend with multiple transmission modalities. Understanding correlates of protection and the role of diversity in limiting protective vaccines with those correlates is key. RV144 was the first HIV-1 vaccine trial to demonstrate efficacy against HIV-1 infection. A correlates analysis comparing vaccine-induced immune responses in vaccinated-infected and vaccinated-uninfected volunteers suggested that IgG specific for the V1V2 region of gp120 was associated with reduced risk of HIV-1 infection and that plasma Env IgA was directly correlated with infection risk. RV144 and recent non-human primate (NHP) challenge studies suggest that Env is essential and perhaps sufficient to induce protective antibody responses against mucosally acquired HIV-1. Whether RV144 immune correlates can apply to different HIV vaccines, to populations with different modes and intensity of transmission, or to divergent HIV-1 subtypes remains unknown. Newer prime-boost mosaic and conserved sequence immunization strategies aiming at inducing immune responses of greater breadth and depth as well as the development of immunogens inducing broadly neutralizing antibodies should be actively pursued. Efficacy trials are now planned in heterosexual populations in southern Africa and men who have sex with men in Thailand. Although NHP challenge studies may guide vaccine development, human efficacy trials remain key to answer the critical questions leading to the development of a global HIV-1 vaccine for licensure.
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Excler JL, Robb ML, Kim JH. Prospects for a globally effective HIV-1 vaccine. Vaccine 2015; 33 Suppl 4:D4-12. [PMID: 26100921 DOI: 10.1016/j.vaccine.2015.03.059] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 03/07/2015] [Accepted: 03/10/2015] [Indexed: 11/28/2022]
Abstract
A globally effective vaccine strategy must cope with the broad genetic diversity of HIV and contend with multiple transmission modalities. Understanding correlates of protection and the role of diversity in limiting protective vaccines with those correlates is key. RV144 was the first HIV-1 vaccine trial to demonstrate efficacy against HIV-1 infection. A correlates analysis compared vaccine-induced immune responses in vaccinated-infected and vaccinated-uninfected volunteers suggested that IgG specific for the V1V2 region of gp120 was associated with reduced risk of HIV-1 infection and that plasma Env IgA was directly correlated with infection risk. RV144 and recent NHP challenge studies suggest that Env is essential and perhaps sufficient to induce protective antibody responses against mucosally acquired HIV-1. Whether RV144 immune correlates can apply to different HIV vaccines, to populations with different modes and intensity of transmission, or to divergent HIV-1 subtypes remains unknown. Newer prime-boost mosaic and conserved sequence immunization strategies aiming at inducing immune responses of greater breadth and depth as well as the development of immunogens inducing broadly neutralizing antibodies should be actively pursued. Efficacy trials are now planned in heterosexual populations in southern Africa and MSM in Thailand. Although NHP challenge studies may guide vaccine development, human efficacy trials remain key to answer the critical questions leading to the development of a global HIV-1 vaccine for licensure.
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Affiliation(s)
- Jean-Louis Excler
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Bethesda, MD, USA; Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA.
| | - Merlin L Robb
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Bethesda, MD, USA; Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA
| | - Jerome H Kim
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Bethesda, MD, USA
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