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Byrareddy SN. Meet Our Editorial Board Member. Curr HIV Res 2021. [DOI: 10.2174/1570162x1903210401104648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Siddappa N. Byrareddy
- Department of Pharmacology and Experimental Neurosciences University of Nebraska Medical Center Omaha, NE, United States
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A single lentivector DNA based immunization contains a late heterologous SIVmac251 mucosal challenge infection. Vaccine 2020; 38:3729-3739. [PMID: 32278522 DOI: 10.1016/j.vaccine.2020.03.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 03/18/2020] [Accepted: 03/28/2020] [Indexed: 12/16/2022]
Abstract
Variety of conventional vaccine strategies tested against HIV-1 have failed to induce protection against HIV acquisition or durable control of viremia. Therefore, innovative strategies that can induce long lasting protective immunity against HIV chronic infection are needed. Recently, we developed an integration-defective HIV lentiDNA vaccine that undergoes a single cycle of replication in target cells in which most viral antigens are produced. A single immunization with such lentiDNA induced long-lasting T-cell and modest antibody responses in cynomolgus macaques. Here eighteen months after this single immunization, all animals were subjected to repeated low dose intra-rectal challenges with a heterologous pathogenic SIVmac251 isolate. Although the viral set point in SIVmac-infected cynomolgus is commonly lower than that seen in Indian rhesus macaques, the vaccinated group of macaques displayed a two log reduction of peak of viremia followed by a progressive and sustained control of virus replication relative to control animals. This antiviral control correlated with antigen-specific CD4+ and CD8+ T cells with high capacity of recall responses comprising effector and central memory T cells but also memory T cell precursors. This is the first description of SIV control in NHP model infected at 18 months following a single immunization with a non-integrative single cycle lentiDNA HIV vaccine. While not delivering sterilizing immunity, our single immunization strategy with a single-cycle lentivector DNA vaccine appears to provide an interesting and safe vaccine platform that warrants further exploration.
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Matchett WE, Anguiano-Zarate SS, Nehete PN, Shelton K, Nehete BP, Yang G, Dorta-Estremera S, Barnette P, Xiao P, Byrareddy SN, Villinger F, Hessell AJ, Haigwood NL, Sastry KJ, Barry MA. Divergent HIV-1-Directed Immune Responses Generated by Systemic and Mucosal Immunization with Replicating Single-Cycle Adenoviruses in Rhesus Macaques. J Virol 2019; 93:e02016-18. [PMID: 30842321 PMCID: PMC6498041 DOI: 10.1128/jvi.02016-18] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 02/22/2019] [Indexed: 12/20/2022] Open
Abstract
Most human immunodeficiency virus type 1 (HIV-1) infections begin at mucosal surfaces. Providing a barrier of protection at these may assist in combating the earliest events in infection. Systemic immunization by intramuscular (i.m.) injection can drive mucosal immune responses, but there are data suggesting that mucosal immunization can better educate these mucosal immune responses. To test this, rhesus macaques were immunized with replicating single-cycle adenovirus (SC-Ad) vaccines expressing clade B HIV-1 gp160 by the intranasal (i.n.) and i.m. routes to compare mucosal and systemic routes of vaccination. SC-Ad vaccines generated significant circulating antibody titers against Env after a single i.m. immunization. Switching the route of second immunization with the same SC-Ad serotype allowed a significant boost in these antibody levels. When these animals were boosted with envelope protein, envelope-binding antibodies were amplified 100-fold, but qualitatively different immune responses were generated. Animals immunized by only the i.m. route had high peripheral T follicular helper (pTfh) cell counts in blood but low Tfh cell counts in lymph nodes. Conversely, animals immunized by the i.n. route had high Tfh cell counts in lymph nodes but low pTfh cell counts in the blood. Animals immunized by only the i.m. route had lower antibody-dependent cellular cytotoxicity (ADCC) antibody activity, whereas animals immunized by the mucosal i.n. route had higher ADCC antibody activity. When these Env-immunized animals were challenged rectally with simian-human immunodeficiency virus (SHIV) strain SF162P3 (SHIVSF162P3), they all became infected. However, mucosally SC-Ad-immunized animals had lower viral loads in their gastrointestinal tracts. These data suggest that there may be benefits in educating the immune system at mucosal sites during HIV vaccination.IMPORTANCE HIV-1 infections usually start at a mucosal surface after sexual contact. Creating a barrier of protection at these mucosal sites may be a good strategy for to protect against HIV-1 infections. While HIV-1 enters at mucosa, most vaccines are not delivered here. Most are instead injected into the muscle, a site well distant and functionally different than mucosal tissues. This study tested if delivering HIV vaccines at mucosa or in the muscle makes a difference in the quality, quantity, and location of immune responses against the virus. These data suggest that there are indeed advantages to educating the immune system at mucosal sites with an HIV-1 vaccine.
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Affiliation(s)
- William E Matchett
- Virology and Gene Therapy Graduate Program, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Pramod N Nehete
- Department of Comparative Medicine, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
- The University of Texas M.D. Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences at Houston, Houston, Texas, USA
| | - Kathryn Shelton
- Department of Comparative Medicine, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
| | - Bharti P Nehete
- Department of Comparative Medicine, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
| | - Guojun Yang
- Department of Oncology Research for Biologics and Immunotherapy Translation, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
| | - Stephanie Dorta-Estremera
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
| | - Philip Barnette
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Peng Xiao
- Department of Biology, New Iberia Research Center, Lafayette, Louisiana, USA
| | - Siddappa N Byrareddy
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Francois Villinger
- Department of Biology, New Iberia Research Center, Lafayette, Louisiana, USA
| | - Ann J Hessell
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Nancy L Haigwood
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - K Jagannadha Sastry
- Department of Comparative Medicine, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
- Department of Oncology Research for Biologics and Immunotherapy Translation, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston and Bastrop, Texas, USA
- The University of Texas M.D. Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences at Houston, Houston, Texas, USA
| | - Michael A Barry
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Department of Internal Medicine, Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
- Department of Immunology, Mayo Clinic, Rochester, Minnesota, USA
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Abstract
INTRODUCTION Traditional inactivated and protein vaccines generate strong antibodies, but struggle to generate T cell responses. Attenuated pathogen vaccines generate both, but risk causing the disease they aim to prevent. Newer gene-based vaccines drive both responses and avoid the risk of infection. While these replication-defective (RD) vaccines work well in small animals, they can be weak in humans because they do not replicate antigen genes like more potent replication-competent (RC) vaccines. RC vaccines generate substantially stronger immune responses, but also risk causing their own infections. To circumvent these problems, we developed single-cycle adenovirus (SC-Ad) vectors that amplify vaccine genes, but that avoid the risk of infection. This review will discuss these vectors and their prospects for use as vaccines. AREAS COVERED This review provides a background of different types of vaccines. The benefits of gene-based vaccines and their ability to replicate antigen genes are described. Adenovirus vectors are discussed and compared to other vaccine types. Replication-defective, single-cycle, and replication-competent Ad vaccines are compared. EXPERT COMMENTARY The potential utility of these vaccines are discussed when used against infectious diseases and as cancer vaccines. We propose a move away from replication-defective vaccines towards more robust replication-competent or single-cycle vaccines.
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Affiliation(s)
- Michael Barry
- a Division of Infectious Diseases, Department of Medicine, Department of Immunology, Department of Molecular Medicine , Mayo Clinic , Rochester , MN , USA
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Dorta-Estremera S, Nehete PN, Yang G, He H, Nehete BP, Shelton KK, Barry MA, Sastry KJ. Minimally invasive monitoring of CD4 T cells at multiple mucosal tissues after intranasal vaccination in rhesus macaques. PLoS One 2017; 12:e0188807. [PMID: 29220358 PMCID: PMC5722341 DOI: 10.1371/journal.pone.0188807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 11/12/2017] [Indexed: 02/03/2023] Open
Abstract
Studies in nonhuman primates (NHP) for prospective immune cell monitoring subsequent to infection and/or vaccination usually rely on periodic sampling of the blood samples with only occasional collections of biopsies from mucosal tissues because of safety concerns and practical constraints. Here we present evidence in support of cytobrush sampling of oral, rectal, and genital mucosal tissues as a minimally invasive approach for the phenotypic analyses of different T cells subsets de novo as well as prospectively after intranasal immunization in rhesus macaques. Significant percentages of viable lymphocytes were obtained consistently from both naïve and chronically SIV-infected rhesus macaques. The percentages of CD3+ T cells in the blood were significantly higher compared to those in the mucosal tissues analyzed in the naïve animals, while in the SIV+ animals the CD3+ T cells were significantly elevated in the rectal tissues, relative to all other sites analyzed. In the naïve, but not SIV+ macaques, the rectal and vaginal mucosal tissues, compared to oral mucosa and blood, showed higher diversity and percentages of CD4+ T cells expressing the HIV entry co-receptor CCR5 and mucosal specific adhesion (CD103) as well as activation (HLA-DR) and proliferation (Ki67) markers. Sequential daily cytobrush sampling from the oral, rectal, and genital mucosal tissues was performed in SIV+ animals from an ongoing study where they were administered intranasal immunization with adenoviral vectored vaccines incorporating the green fluorescent protein (GFP) reporter gene. We detected a transient increase in GFP+ CD4 T cells in only oral mucosa suggesting limited mucosal trafficking. In general, CD4+ and CD8+ T cells expressing Ki67 transiently increased in all mucosal tissues, but those expressing the CCR5, HLA-DR, and CD103 markers exhibited minor changes. We propose the minimally invasive cytobrush sampling as a practical approach for effective and prospective immune monitoring of the oral-genital mucosal tissues in NHP.
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Affiliation(s)
- Stephanie Dorta-Estremera
- The University of Texas MD Anderson Cancer Center, Department of Immunology, Houston, TX, United States of America
| | - Pramod N. Nehete
- The University of Texas MD Anderson Cancer Center, Department of Veterinary Sciences, Bastrop, TX, United States of America
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, United States of America
| | - Guojun Yang
- The University of Texas MD Anderson Cancer Center, Department of Immunology, Houston, TX, United States of America
| | - Hong He
- The University of Texas MD Anderson Cancer Center, Department of Stem Cell Transplantation, Houston, TX, United States of America
| | - Bharti P. Nehete
- The University of Texas MD Anderson Cancer Center, Department of Veterinary Sciences, Bastrop, TX, United States of America
| | - Kathryn K. Shelton
- The University of Texas MD Anderson Cancer Center, Department of Veterinary Sciences, Bastrop, TX, United States of America
| | - Michael A. Barry
- Mayo Clinic, Department of Internal Medicine, Division of Infectious Diseases, Rochester, MN, United States of America
- Mayo Clinic, Department of Molecular Medicine, Rochester, MN, United States of America
- Mayo Clinic, Department of Immunology, Rochester, MN, United States of America
- Mayo Clinic, Translational Immunology Virology and Biodefense Program, Rochester, MN, United States of America
| | - K. Jagannadha Sastry
- The University of Texas MD Anderson Cancer Center, Department of Immunology, Houston, TX, United States of America
- The University of Texas MD Anderson Cancer Center, Department of Veterinary Sciences, Bastrop, TX, United States of America
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, United States of America
- * E-mail:
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Fuchs SP, Desrosiers RC. Promise and problems associated with the use of recombinant AAV for the delivery of anti-HIV antibodies. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:16068. [PMID: 28197421 PMCID: PMC5289440 DOI: 10.1038/mtm.2016.68] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/11/2016] [Indexed: 02/07/2023]
Abstract
Attempts to elicit antibodies with potent neutralizing activity against a broad range of human immunodeficiency virus (HIV) isolates have so far proven unsuccessful. Long-term delivery of monoclonal antibodies (mAbs) with such activity is a creative alternative that circumvents the need for an immune response and has the potential for creating a long-lasting sterilizing barrier against HIV. This approach is made possible by an incredible array of potent broadly neutralizing antibodies (bnAbs) that have been identified over the last several years. Recombinant adeno-associated virus (rAAV) vectors are ideally suited for long-term delivery for a variety of reasons. The only products made from rAAV are derived from the transgenes that are put into it; as long as those products are not viewed as foreign, expression from muscle tissue may continue for decades. Thus, use of rAAV to achieve long-term delivery of anti-HIV mAbs with potent neutralizing activity against a broad range of HIV-1 isolates is emerging as a promising concept for the prevention or treatment of HIV-1 infection in humans. Experiments in mice and monkeys that have demonstrated protective efficacy against AIDS virus infection have raised hopes for the promise of this approach. However, all published experiments in monkeys have encountered unwanted immune responses to the AAV-delivered antibody, and these immune responses appear to limit the levels of delivered antibody that can be achieved. In this review, we highlight the promise of rAAV-mediated antibody delivery for the prevention or treatment of HIV infection in humans, but we also discuss the obstacles that will need to be understood and solved in order for the promise of this approach to be realized.
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Affiliation(s)
- Sebastian P Fuchs
- Department of Pathology, Miller School of Medicine, University of Miami, Miami, Florida, USA; Institut für Klinische und Molekulare Virologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Ronald C Desrosiers
- Department of Pathology, Miller School of Medicine, University of Miami , Miami, Florida, USA
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Smith SA, Kilgore KM, Kasturi SP, Pulendran B, Hunter E, Amara RR, Derdeyn CA. Signatures in Simian Immunodeficiency Virus SIVsmE660 Envelope gp120 Are Associated with Mucosal Transmission but Not Vaccination Breakthrough in Rhesus Macaques. J Virol 2016; 90:1880-7. [PMID: 26676777 PMCID: PMC4734005 DOI: 10.1128/jvi.02711-15] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 11/23/2015] [Indexed: 02/08/2023] Open
Abstract
UNLABELLED Mucosal surfaces are vulnerable to human immunodeficiency virus (HIV)/simian immunodeficiency virus (SIV) infection and thus are key sites for eliciting vaccine-mediated protection. Vaccine protocols carried out at the Yerkes Primate Research Center utilized SIVmac239-based immunization strategies with intrarectal and intravaginal SIVsmE660 challenge of rhesus macaques. We investigated whether there were genetic signatures associated with SIVsmE660 intrarectal and intravaginal transmissions in vaccinated and unvaccinated monkeys. When transmitted/founder (T/F) envelope (Env) sequences from 49 vaccinated and 15 unvaccinated macaques were compared to each other, we were unable to identify any vaccine breakthrough signatures. In contrast, when the vaccinated and control T/F Envs were combined and compared to the challenge stock, residues at gp120 positions 23, 45, 47, and 70 (Ile-Ala-Lys-Asn [I-A-K-N]) emerged as signatures of mucosal transmission. However, T/F Envs derived from intrarectal and intravaginal infections were not different. Our data suggest that the vaginal and rectal mucosal environments both imposed a strong selection bias for SIVsmE660 variants carrying I-A-K-N that was not further enhanced by immunization. These findings, combined with the strong conservation of A-K-N in most HIV-2/SIVsmm isolates and the analogous residues in HIV-1/SIVcpz isolates, suggest that these residues confer increased transmission fitness to SIVsmE660. IMPORTANCE Most HIV-1 infections occur across a mucosal barrier, and it is therefore important to understand why these sites are vulnerable and how to protect them with a vaccine. To gain insight into these questions, we studied rhesus macaques that were vaccinated with SIVmac239 and unvaccinated controls to determine whether the SIVsmE660 viral variants that infected these two groups were different. We did not find differences between viral variants in the absence versus presence of vaccination-induced immunity, but we did find that the SIVsmE660 viral variants that infected the monkeys, regardless of vaccination, were different from the dominant population found in the viral challenge inoculum. Our data suggest that the mucosal environments of the vagina and rectum both impose a strong selection for the SIVsmE660 variants in the challenge inoculum that are most like SIV and HIVs that circulate in nature.
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Affiliation(s)
- S Abigail Smith
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA
| | - Katie M Kilgore
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA
| | - Sudhir Pai Kasturi
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA
| | - Bali Pulendran
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, USA
| | - Eric Hunter
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, USA
| | - Rama R Amara
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, USA
| | - Cynthia A Derdeyn
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA Emory Vaccine Center, Emory University, Atlanta, Georgia, USA Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, USA
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Temchura V, Tenbusch M. The two faces of vaccine-induced immune response: protection or increased risk of HIV infection?! Virol Sin 2014; 29:7-9. [PMID: 24452542 DOI: 10.1007/s12250-014-3419-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Vladimir Temchura
- Department of Molecular and Medical Virology, Ruhr-University Bochum, Bochum, 44801, Germany
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