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de La Vega MA, Xiii A, Massey S, Spengler JR, Kobinger GP, Woolsey C. An update on nonhuman primate usage for drug and vaccine evaluation against filoviruses. Expert Opin Drug Discov 2024:1-27. [PMID: 39090822 DOI: 10.1080/17460441.2024.2386100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2024] [Revised: 07/24/2024] [Accepted: 07/25/2024] [Indexed: 08/04/2024]
Abstract
INTRODUCTION Due to their faithful recapitulation of human disease, nonhuman primates (NHPs) are considered the gold standard for evaluating drugs against Ebolavirus and other filoviruses. The long-term goal is to reduce the reliance on NHPs with more ethical alternatives. In silico simulations and organoid models have the potential to revolutionize drug testing by providing accurate, human-based systems that mimic disease processes and drug responses without the ethical concerns associated with animal testing. However, as these emerging technologies are still in their developmental infancy, NHP models are presently needed for late-stage evaluation of filovirus vaccines and drugs, as they provide critical insights into the efficacy and safety of new medical countermeasures. AREAS COVERED In this review, the authors introduce available NHP models and examine the existing literature on drug discovery for all medically significant filoviruses in corresponding models. EXPERT OPINION A deliberate shift toward animal-free models is desired to align with the 3Rs of animal research. In the short term, the use of NHP models can be refined and reduced by enhancing replicability and publishing negative data. Replacement involves a gradual transition, beginning with the selection and optimization of better small animal models; advancing organoid systems, and using in silico models to accurately predict immunological outcomes.
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Affiliation(s)
- Marc-Antoine de La Vega
- Galveston National Laboratory, Department of Microbiology and Immunology, Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA
| | - Ara Xiii
- Galveston National Laboratory, Department of Microbiology and Immunology, Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA
| | - Shane Massey
- Office of Regulated Nonclinical Studies, University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Jessica R Spengler
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Gary P Kobinger
- Galveston National Laboratory, Department of Microbiology and Immunology, Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA
| | - Courtney Woolsey
- Galveston National Laboratory, Department of Microbiology and Immunology, Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA
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Wong G, Bienes KM, Xiii A, Fausther-Bovendo H, Kobinger GP. Ebola-specific therapeutic antibodies from lab to clinic: The example of ZMapp. Antiviral Res 2024; 226:105873. [PMID: 38580170 DOI: 10.1016/j.antiviral.2024.105873] [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: 01/30/2024] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/07/2024]
Abstract
In the 1990s, monoclonal antibodies (mAbs) progressed from scientific tools to advanced therapeutics, particularly for the treatment of cancers and autoimmune and inflammatory disorders. In the arena of infectious disease, the inauguration of mAbs as a post-exposure treatment in humans against Ebola virus (EBOV) occurred in response to the 2013-2016 West Africa outbreak. This review recounts the history of a candidate mAb treatment, ZMapp, beginning with its emergency use in the 2013-2016 outbreak and advancing to randomized controlled trials into the 2018-2020 African outbreak. We end with a brief discussion of the hurdles and promise toward mAb therapeutic use against infectious disease.
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Affiliation(s)
- Gary Wong
- Virology Unit, Institut Pasteur Du Cambodge, Pasteur Network, Phnom Penh, Cambodia
| | - Kathrina Mae Bienes
- Virology Unit, Institut Pasteur Du Cambodge, Pasteur Network, Phnom Penh, Cambodia
| | - Ara Xiii
- Department of Immunology and Microbiology, The Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX, USA.
| | - Hugues Fausther-Bovendo
- Department of Immunology and Microbiology, The Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX, USA
| | - Gary P Kobinger
- Department of Immunology and Microbiology, The Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX, USA
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Woolsey C, Borisevich V, Agans KN, O’Toole R, Fenton KA, Harrison MB, Prasad AN, Deer DJ, Gerardi C, Morrison N, Cross RW, Eldridge JH, Matassov D, Geisbert TW. A Highly Attenuated Panfilovirus VesiculoVax Vaccine Rapidly Protects Nonhuman Primates Against Marburg Virus and 3 Species of Ebola Virus. J Infect Dis 2023; 228:S660-S670. [PMID: 37171813 PMCID: PMC11009496 DOI: 10.1093/infdis/jiad157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/01/2023] [Accepted: 05/09/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND The family Filoviridae consists of several virus members known to cause significant mortality and disease in humans. Among these, Ebola virus (EBOV), Marburg virus (MARV), Sudan virus (SUDV), and Bundibugyo virus (BDBV) are considered the deadliest. The vaccine, Ervebo, was shown to rapidly protect humans against Ebola disease, but is indicated only for EBOV infections with limited cross-protection against other filoviruses. Whether multivalent formulations of similar recombinant vesicular stomatitis virus (rVSV)-based vaccines could likewise confer rapid protection is unclear. METHODS Here, we tested the ability of an attenuated, quadrivalent panfilovirus VesiculoVax vaccine (rVSV-Filo) to elicit fast-acting protection against MARV, EBOV, SUDV, and BDBV. Groups of cynomolgus monkeys were vaccinated 7 days before exposure to each of the 4 viral pathogens. All subjects (100%) immunized 1 week earlier survived MARV, SUDV, and BDBV challenge; 80% survived EBOV challenge. Survival correlated with lower viral load, higher glycoprotein-specific immunoglobulin G titers, and the expression of B-cell-, cytotoxic cell-, and antigen presentation-associated transcripts. CONCLUSIONS These results demonstrate multivalent VesiculoVax vaccines are suitable for filovirus outbreak management. The highly attenuated nature of the rVSV-Filo vaccine may be preferable to the Ervebo "delta G" platform, which induced adverse events in a subset of recipients.
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Affiliation(s)
- Courtney Woolsey
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Viktoriya Borisevich
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Krystle N Agans
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Rachel O’Toole
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Karla A Fenton
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Mack B Harrison
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Abhishek N Prasad
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Daniel J Deer
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Cheryl Gerardi
- Department of Viral Vaccine Development, Auro Vaccines, Pearl River, New York, USA
| | - Nneka Morrison
- Department of Viral Vaccine Development, Auro Vaccines, Pearl River, New York, USA
| | - Robert W Cross
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - John H Eldridge
- Department of Viral Vaccine Development, Auro Vaccines, Pearl River, New York, USA
| | - Demetrius Matassov
- Department of Viral Vaccine Development, Auro Vaccines, Pearl River, New York, USA
| | - Thomas W Geisbert
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
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Woolsey C, Strampe J, Fenton KA, Agans KN, Martinez J, Borisevich V, Dobias NS, Deer DJ, Geisbert JB, Cross RW, Connor JH, Geisbert TW. A Recombinant Vesicular Stomatitis Virus-Based Vaccine Provides Postexposure Protection Against Bundibugyo Ebolavirus Infection. J Infect Dis 2023; 228:S712-S720. [PMID: 37290053 PMCID: PMC10651203 DOI: 10.1093/infdis/jiad207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/27/2023] [Accepted: 06/02/2023] [Indexed: 06/10/2023] Open
Abstract
BACKGROUND The filovirus Bundibugyo virus (BDBV) causes severe disease with a mortality rate of approximately 20%-51%. The only licensed filovirus vaccine in the United States, Ervebo, consists of a recombinant vesicular stomatitis virus (rVSV) vector that expresses Ebola virus (EBOV) glycoprotein (GP). Ervebo was shown to rapidly protect against fatal Ebola disease in clinical trials; however, the vaccine is only indicated against EBOV. Recent outbreaks of other filoviruses underscore the need for additional vaccine candidates, particularly for BDBV infections. METHODS To examine whether the rVSV vaccine candidate rVSVΔG/BDBV-GP could provide therapeutic protection against BDBV, we inoculated seven cynomolgus macaques with 1000 plaque-forming units of BDBV, administering rVSVΔG/BDBV-GP vaccine to 6 of them 20-23 minutes after infection. RESULTS Five of the treated animals survived infection (83%) compared to an expected natural survival rate of 21% in this macaque model. All treated animals showed an early circulating immune response, while the untreated animal did not. Surviving animals showed evidence of both GP-specific IgM and IgG production, while animals that succumbed did not produce significant IgG. CONCLUSIONS This small, proof-of-concept study demonstrated early treatment with rVSVΔG/BDBV-GP provides a survival benefit in this nonhuman primate model of BDBV infection, perhaps through earlier initiation of adaptive immunity.
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Affiliation(s)
- Courtney Woolsey
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Jamie Strampe
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, Massachusetts, USA
- Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Karla A Fenton
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Krystle N Agans
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Jasmine Martinez
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Viktoriya Borisevich
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Natalie S Dobias
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Daniel J Deer
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Joan B Geisbert
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - Robert W Cross
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
| | - John H Connor
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, Massachusetts, USA
- Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Thomas W Geisbert
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Galveston National Laboratory, University of Texas Medical Branch, Galveston, Texas, USA
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O’Donnell KL, Callison J, Feldmann H, Hoenen T, Marzi A. Single-Dose Treatment With Vesicular Stomatitis Virus-Based Ebola Virus Vaccine Expressing Ebola Virus-Specific Artificial Micro-RNA Does Not Protect Mice From Lethal Disease. J Infect Dis 2023; 228:S677-S681. [PMID: 37186162 PMCID: PMC10651205 DOI: 10.1093/infdis/jiad121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/13/2023] [Accepted: 04/25/2023] [Indexed: 05/17/2023] Open
Abstract
Although significant progress has been made in the development of therapeutics against Ebola virus (EBOV), we sought to expand upon existing strategies and combine an RNA interference-based intervention with the approved vesicular stomatitis virus-based Ebola virus (VSV-EBOV) vaccine to conjointly treat and vaccinate patients during an outbreak. We constructed VSV-EBOV vectors expressing artificial micro-RNAs (amiRNAs) targeting sequences of EBOV proteins. In vitro experiments demonstrated a robust decrease in EBOV replication using a minigenome system and infectious virus. For in vivo evaluation, mouse-adapted EBOV-infected CD-1 mice were treated 24 hours after infection with a single dose of the VSV-EBOV amiRNA constructs. We observed no difference in disease progression or survival compared to the control-treated mice. In summary, while amiRNAs decrease viral replication in vitro, the effect is not sufficient to protect mice from lethal disease, and this therapeutic approach requires further optimization.
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Affiliation(s)
- Kyle L O’Donnell
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Julie Callison
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Thomas Hoenen
- Laboratory for Integrative Cell and Infection Biology, Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald, Germany
| | - Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
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Bushmaker T, Feldmann F, Lovaglio J, Saturday G, Griffin AJ, O’Donnell KL, Strong JE, Sprecher A, Kobinger G, Geisbert TW, Marzi A, Feldmann H. Limited Benefit of Postexposure Prophylaxis With VSV-EBOV in Ebola Virus-Infected Rhesus Macaques. J Infect Dis 2023; 228:S721-S729. [PMID: 37474155 PMCID: PMC10651186 DOI: 10.1093/infdis/jiad280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/11/2023] [Accepted: 07/17/2023] [Indexed: 07/22/2023] Open
Abstract
Vesicular stomatitis virus-Ebola virus (VSV-EBOV) vaccine has been successfully used in ring vaccination approaches during EBOV disease outbreaks demonstrating its general benefit in short-term prophylactic vaccination, but actual proof of its benefit in true postexposure prophylaxis (PEP) for humans is missing. Animal studies have indicated PEP efficacy when VSV-EBOV was used within hours of lethal EBOV challenge. Here, we used a lower EBOV challenge dose and a combined intravenous and intramuscular VSV-EBOV administration to improve PEP efficacy in the rhesus macaque model. VSV-EBOV treatment 1 hour after EBOV challenge resulted in delayed disease progression but little benefit in outcome. Thus, we could not confirm previous results indicating questionable benefit of VSV-EBOV for EBOV PEP in a nonhuman primate model.
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Affiliation(s)
- Trenton Bushmaker
- Laboratory of Virology, Rocky Mountain Laboratories, National Institutes of Health, Hamilton, Montana
| | - Friederike Feldmann
- Rocky Mountain Veterinary Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Jamie Lovaglio
- Rocky Mountain Veterinary Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Greg Saturday
- Rocky Mountain Veterinary Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Amanda J Griffin
- Laboratory of Virology, Rocky Mountain Laboratories, National Institutes of Health, Hamilton, Montana
| | - Kyle L O’Donnell
- Laboratory of Virology, Rocky Mountain Laboratories, National Institutes of Health, Hamilton, Montana
| | - James E Strong
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | | | - Gary Kobinger
- Galveston National Laboratory, University of Texas Medical Branch at Galveston, Galveston, Texas
| | - Thomas W Geisbert
- Galveston National Laboratory, University of Texas Medical Branch at Galveston, Galveston, Texas
| | - Andrea Marzi
- Laboratory of Virology, Rocky Mountain Laboratories, National Institutes of Health, Hamilton, Montana
| | - Heinz Feldmann
- Laboratory of Virology, Rocky Mountain Laboratories, National Institutes of Health, Hamilton, Montana
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Marzi A, Fletcher P, Feldmann F, Saturday G, Hanley PW, Feldmann H. Species-specific immunogenicity and protective efficacy of a vesicular stomatitis virus-based Sudan virus vaccine: a challenge study in macaques. THE LANCET. MICROBE 2023; 4:e171-e178. [PMID: 36739878 PMCID: PMC10010116 DOI: 10.1016/s2666-5247(23)00001-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/16/2022] [Accepted: 12/20/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND The recent Sudan virus (SUDV) outbreak in Uganda highlights the need for rapid response capabilities, including development of vaccines against emerging viruses with high public health impact. We aimed to develop a Sudan virus-specific vaccine suitable for emergency use during outbreaks. METHODS We generated and characterised a vesicular stomatitis virus (VSV)-based vaccine, VSV- SUDV, and evaluated the protective efficacy following a single-dose vaccination against lethal SUDV infection in non-human primates (NHPs). We used male and female cynomolgus macaques (n=11) aged 6-11 years and weighing 3·8-9·0 kg. Animals received a 1 mL intramuscular injection for vaccination containing either 1 × 107 plaque forming units (PFU) VSV-SUDV or 1 × 107 PFU of a VSV-based vaccine against Marburg virus (control; five NHPs). NHPs were challenged intramuscularly 28 days after vaccination with 1 × 104 TCID50 SUDV-Gulu. We assessed anaesthetised NHPs on days 28, 21, 14, and 7 before challenge; days 0, 3, 6, 9, 14, 21, 28, and 35 after challenge; and at euthanasia (day 40 for survivors). As we repurposed NHPs from a successful VSV-Ebola virus (EBOV) vaccine efficacy study, we also investigated VSV-EBOV's cross-protective potential against SUDV challenge. FINDINGS Of the six NHPs given VSV-SUDV, none showed any signs of disease in response to the challenge. Four of the five NHPs in the control group developed characteristic clinical signs of Sudan virus diseases. SUDV glycoprotein-specific IgG concentrations peaked 14 days after vaccination (titre of >1:10 000) and reached their highest concentrations at 6 days after challenge (1:25 600-1:102 400). Although the NHPs developed cross-reactive humoral responses to SUDV after VSV-EBOV vaccination and EBOV challenge, there was little cross-protection. INTERPRETATION These data emphasise the need for species-specific vaccines for each human-pathogenic Ebolavirus. Furthermore, although previous VSV-EBOV immunity is boosted through VSV-SUDV vaccination, it only has a small effect on the immunogenicity and protective efficacy of VSV-SUDV vaccination against SUDV challenge. FUNDING Intramural Research Program, US National Institute of Allergy and Infectious Diseases, National Institutes of Health.
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Affiliation(s)
- Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA.
| | - Paige Fletcher
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Friederike Feldmann
- Rocky Mountain Veterinary Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Greg Saturday
- Rocky Mountain Veterinary Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Patrick W Hanley
- Rocky Mountain Veterinary Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA.
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Gruber MF, Rubin S, Krause PR. Approaches to demonstrating the effectiveness of filovirus vaccines: Lessons from Ebola and COVID-19. Front Immunol 2023; 14:1109486. [PMID: 36817425 PMCID: PMC9932497 DOI: 10.3389/fimmu.2023.1109486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 01/24/2023] [Indexed: 02/05/2023] Open
Abstract
Zaire ebolavirus (EBOV), Sudan ebolavirus (SUDV) and Marburg virus (MARV), are members of the Filoviridae family that can cause severe disease and death in humans and animals. The reemergence of Ebola, Sudan and Marburg virus disease highlight the need for continued availability of safe and effectives vaccines as well as development of new vaccines. While randomized controlled trials using disease endpoints provide the most robust assessment of vaccine effectiveness, challenges to this approach include the unpredictable size, location, occurrence and duration of filovirus disease outbreaks. Thus, other approaches to demonstrating vaccine effectiveness have been considered. These approaches are discussed using examples of preventive vaccines against other infectious diseases. In addition, this article proposes a clinical immunobridging strategy using licensed EBOV vaccines as comparators for demonstrating the effectiveness of filovirus vaccine candidates that are based on the same licensed vaccine platform technology.
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Affiliation(s)
- Marion F. Gruber
- International AIDS Vaccine Initiative, New York, NY, United States,*Correspondence: Marion F. Gruber,
| | - Steven Rubin
- GlaxoSmithKline (GSk), Rockville, MD, United States
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9
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History and impact of the mouse-adapted Ebola virus model. Antiviral Res 2023; 210:105493. [PMID: 36567023 DOI: 10.1016/j.antiviral.2022.105493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022]
Abstract
Ebola virus (EBOV) is a member of the filoviridae family, which are comprised of negative sense, enveloped RNA hemorrhagic fever viruses that can cause severe disease and high lethality rates. These viruses require BSL-4 containment laboratories for study. Early studies of EBOV pathogenesis relied heavily on the use of nonhuman primates, which are expensive and cumbersome to handle in large numbers. Guinea pig models were also developed, but even to this day limited reagents are available in this model. In 1998, Mike Bray and colleagues developed a mouse-adapted EBOV (maEBOV) that caused lethality in adult immunocompetent mice. This model had significant advantages, including being inexpensive, allowing for higher animal numbers for statistical analysis, availability of reagents for studying pathogenesis, and availability of a vast array of genetically modified strains. The model has been used to test vaccines, therapeutic drugs, EBOV mutants, and pathogenesis, and its importance is demonstrated by the hundreds of citations referencing the original publication. This review will cover the history of the maEBOV model and its use in filovirus research.
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10
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Yuan F, Zheng A. Replicating-Competent VSV-Vectored Pseudotyped Viruses. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1407:329-348. [PMID: 36920706 DOI: 10.1007/978-981-99-0113-5_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Vesicular stomatitis virus (VSV) is prototype virus in the family of Rhabdoviridae. Reverse genetic platform has enabled the genetic manipulation of VSV as a powerful live viral vector. Replicating-competent VSV is constructed by replacing the original VSV glycoprotein gene with heterologous envelope genes. The resulting recombinant viruses are able to replicate in permissive cells and incorporate the foreign envelope proteins on the surface of the viral particle without changing the bullet-shape morphology. Correspondingly, the cell tropism of replicating-competent VSV is determined by the foreign envelope proteins. Replicating-competent VSVs have been successfully used for selecting critical viral receptors or host factors, screening mutants that escape therapeutic antibodies, and developing VSV-based live viral vaccines.
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Affiliation(s)
- Fei Yuan
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Aihua Zheng
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
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11
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Crozier I, Britson KA, Wolfe DN, Klena JD, Hensley LE, Lee JS, Wolfraim LA, Taylor KL, Higgs ES, Montgomery JM, Martins KA. The Evolution of Medical Countermeasures for Ebola Virus Disease: Lessons Learned and Next Steps. Vaccines (Basel) 2022; 10:1213. [PMID: 36016101 PMCID: PMC9415766 DOI: 10.3390/vaccines10081213] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/27/2022] [Accepted: 07/27/2022] [Indexed: 11/26/2022] Open
Abstract
The Ebola virus disease outbreak that occurred in Western Africa from 2013-2016, and subsequent smaller but increasingly frequent outbreaks of Ebola virus disease in recent years, spurred an unprecedented effort to develop and deploy effective vaccines, therapeutics, and diagnostics. This effort led to the U.S. regulatory approval of a diagnostic test, two vaccines, and two therapeutics for Ebola virus disease indications. Moreover, the establishment of fieldable diagnostic tests improved the speed with which patients can be diagnosed and public health resources mobilized. The United States government has played and continues to play a key role in funding and coordinating these medical countermeasure efforts. Here, we describe the coordinated U.S. government response to develop medical countermeasures for Ebola virus disease and we identify lessons learned that may improve future efforts to develop and deploy effective countermeasures against other filoviruses, such as Sudan virus and Marburg virus.
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Affiliation(s)
- Ian Crozier
- Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA;
| | - Kyla A. Britson
- U.S. Department of Health and Human Services (DHHS), Assistant Secretary for Preparedness and Response (ASPR), Biomedical Advanced Research and Development Authority (BARDA), Washington, DC 20201, USA; (K.A.B.); (D.N.W.); (J.S.L.)
- U.S. Department of Health and Human Services (DHHS), Assistant Secretary for Preparedness and Response (ASPR), Biomedical Advanced Research and Development Authority (BARDA), Oak Ridge Institute for Science and Education (ORISE) Postdoctoral Fellow, Oak Ridge, TN 37831, USA
| | - Daniel N. Wolfe
- U.S. Department of Health and Human Services (DHHS), Assistant Secretary for Preparedness and Response (ASPR), Biomedical Advanced Research and Development Authority (BARDA), Washington, DC 20201, USA; (K.A.B.); (D.N.W.); (J.S.L.)
| | - John D. Klena
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA; (J.D.K.); (J.M.M.)
| | - Lisa E. Hensley
- Integrated Research Facility, National Institute of Allergy and Infectious Diseases, Fort Detrick, MD 12116, USA;
| | - John S. Lee
- U.S. Department of Health and Human Services (DHHS), Assistant Secretary for Preparedness and Response (ASPR), Biomedical Advanced Research and Development Authority (BARDA), Washington, DC 20201, USA; (K.A.B.); (D.N.W.); (J.S.L.)
| | - Larry A. Wolfraim
- U.S. Department of Health and Human Services (DHHS), National Institutes of Health (NIH), National Institute of Allergy and Infectious Diseases (NIAID), Rockville, MD 20852, USA; (L.A.W.); (K.L.T.); (E.S.H.)
| | - Kimberly L. Taylor
- U.S. Department of Health and Human Services (DHHS), National Institutes of Health (NIH), National Institute of Allergy and Infectious Diseases (NIAID), Rockville, MD 20852, USA; (L.A.W.); (K.L.T.); (E.S.H.)
| | - Elizabeth S. Higgs
- U.S. Department of Health and Human Services (DHHS), National Institutes of Health (NIH), National Institute of Allergy and Infectious Diseases (NIAID), Rockville, MD 20852, USA; (L.A.W.); (K.L.T.); (E.S.H.)
| | - Joel M. Montgomery
- Viral Special Pathogens Branch, Division of High Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA; (J.D.K.); (J.M.M.)
| | - Karen A. Martins
- U.S. Department of Health and Human Services (DHHS), Assistant Secretary for Preparedness and Response (ASPR), Biomedical Advanced Research and Development Authority (BARDA), Washington, DC 20201, USA; (K.A.B.); (D.N.W.); (J.S.L.)
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12
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Harris JE. The repeated setbacks of HIV vaccine development laid the groundwork for SARS-CoV-2 vaccines. HEALTH POLICY AND TECHNOLOGY 2022; 11:100619. [PMID: 35340773 PMCID: PMC8935961 DOI: 10.1016/j.hlpt.2022.100619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The decades-long effort to produce a workable HIV vaccine has hardly been a waste of public and private resources. To the contrary, the scientific know-how acquired along the way has served as the critical foundation for the development of vaccines against the novel, pandemic SARS-CoV-2 virus. We retell the real-world story of HIV vaccine research – with all its false leads and missteps – in a way that sheds light on the current state of the art of antiviral vaccines. We find that HIV-related R&D had more than a general spillover effect. In fact, the repeated failures of phase 2 and 3 clinical trials of HIV vaccine candidates have served as a critical stimulus to the development of successful vaccine technologies today. We rebut the counterargument that HIV vaccine development has been no more than a blind alley, and that recently developed vaccines against COVID-19 are really descendants of successful vaccines against Ebola, MERS, and SARS. These successful vaccines likewise owe much to the vicissitudes of HIV vaccine development. We then discuss how the failures of HIV vaccine development have taught us how adapt SARS-CoV-2 vaccines to immune escape from emerging variants. Finally, we inquire whether recent advances in the development of vaccines against SARS-CoV-2 might in turn further the development of an HIV vaccine - what we describe as a reverse spillover effect.
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Affiliation(s)
- Jeffrey E Harris
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Eisner Health, Los Angeles, CA 90015, USA
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13
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Liu CH, Hu YT, Wong SH, Lin LT. Therapeutic Strategies against Ebola Virus Infection. Viruses 2022; 14:v14030579. [PMID: 35336986 PMCID: PMC8954160 DOI: 10.3390/v14030579] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/03/2022] [Accepted: 03/08/2022] [Indexed: 12/10/2022] Open
Abstract
Since the 2014–2016 epidemic, Ebola virus (EBOV) has spread to several countries and has become a major threat to global health. EBOV is a risk group 4 pathogen, which imposes significant obstacles for the development of countermeasures against the virus. Efforts have been made to develop anti-EBOV immunization and therapeutics, with three vaccines and two antibody-based therapeutics approved in recent years. Nonetheless, the high fatality of Ebola virus disease highlights the need to continuously develop antiviral strategies for the future management of EBOV outbreaks in conjunction with vaccination programs. This review aims to highlight potential EBOV therapeutics and their target(s) of inhibition, serving as a summary of the literature to inform readers of the novel candidates available in the continued search for EBOV antivirals.
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Affiliation(s)
- Ching-Hsuan Liu
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
| | - Yee-Tung Hu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
| | - Shu Hui Wong
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
| | - Liang-Tzung Lin
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
- Correspondence:
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14
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Bradfute SB. The discovery and development of novel treatment strategies for filoviruses. Expert Opin Drug Discov 2021; 17:139-149. [PMID: 34962451 DOI: 10.1080/17460441.2022.2013800] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Filoviruses are negative-stranded, enveloped RNA viruses that can cause hemorrhagic fever in humans and include Ebola and Marburg viruses. Lethality rates can reach 90% in isolated outbreaks. The 2013-2016 Ebola virus epidemic demonstrated the global threat of filoviruses and hastened development of vaccines and therapeutics. There are six known filoviruses that cause disease in humans, but still few therapeutics are available for treatment. AREAS COVERED This review summarizes identification, testing, and development of therapeutics based on the peer-reviewed scientific literature beginning with the discovery of filoviruses in 1967. Small molecules, antibodies, cytokines, antisense, post-exposure vaccination, and host-targeted therapeutic approaches are discussed. An emphasis is placed on therapeutics that have shown promise in in vivo studies. EXPERT OPINION Two monoclonal antibody regimens are approved for use in humans for one filovirus (Ebola virus), and preclinical nonhuman primate studies suggest that other monoclonal-based therapies are likely to be effective against other filoviruses. Significant progress has been made in small-molecule antivirals and host-targeted approaches. An important consideration is the necessity of pan-filovirus therapeutics via broadly effective small molecules, antibody cocktails, and cross-reactive antibodies. The use of filovirus therapeutics as prophylactic treatment or in chronically infected individuals should be considered.
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Affiliation(s)
- Steven B Bradfute
- Center for Global Health, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, USA
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15
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Pinski AN, Messaoudi I. Therapeutic vaccination strategies against EBOV by rVSV-EBOV-GP: the role of innate immunity. Curr Opin Virol 2021; 51:179-189. [PMID: 34749265 DOI: 10.1016/j.coviro.2021.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/14/2021] [Accepted: 10/19/2021] [Indexed: 12/30/2022]
Abstract
Zaire Ebola virus (EBOV) is a member of the Filoviridae family. Infection with EBOV causes Ebola virus disease (EVD) characterized by excessive inflammation, lymphocyte death, coagulopathy, and multi-organ failure. In 2019, the FDA-approved the first anti-EBOV vaccine, rVSV-EBOV-GP (Ervebo® by Merck). This live-recombinant vaccine confers both prophylactic and therapeutic protection to nonhuman primates and humans. While mechanisms conferring prophylactic protection are well-investigated, those underlying protection conferred shortly before and after exposure to EBOV remain poorly understood. In this review, we review data from in vitro and in vivo studies analyzing early immune responses to rVSV-EBOV-GP and discuss the role of innate immune activation in therapeutic protection.
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Affiliation(s)
- Amanda N Pinski
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA
| | - Ilhem Messaoudi
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA; Center for Virus Research, University of California, Irvine, Irvine, CA, USA; Institute for Immunology, University of California, Irvine, Irvine, CA, USA; Department of Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, Lexington, KY, USA.
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16
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Hargreaves A, Brady C, Mellors J, Tipton T, Carroll MW, Longet S. Filovirus Neutralising Antibodies: Mechanisms of Action and Therapeutic Application. Pathogens 2021; 10:pathogens10091201. [PMID: 34578233 PMCID: PMC8468515 DOI: 10.3390/pathogens10091201] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/10/2021] [Accepted: 09/12/2021] [Indexed: 12/02/2022] Open
Abstract
Filoviruses, especially Ebola virus, cause sporadic outbreaks of viral haemorrhagic fever with very high case fatality rates in Africa. The 2013–2016 Ebola epidemic in West Africa provided large survivor cohorts spurring a large number of human studies which showed that specific neutralising antibodies played a key role in protection following a natural Ebola virus infection, as part of the overall humoral response and in conjunction with the cellular adaptive response. This review will discuss the studies in survivors and animal models which described protective neutralising antibody response. Their mechanisms of action will be detailed. Furthermore, the importance of neutralising antibodies in antibody-based therapeutics and in vaccine-induced responses will be explained, as well as the strategies to avoid immune escape from neutralising antibodies. Understanding the neutralising antibody response in the context of filoviruses is crucial to furthering our understanding of virus structure and function, in addition to improving current vaccines & antibody-based therapeutics.
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Affiliation(s)
- Alexander Hargreaves
- Nuffield Department of Medicine, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK; (A.H.); (C.B.); (J.M.); (T.T.); (M.W.C.)
- Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - Caolann Brady
- Nuffield Department of Medicine, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK; (A.H.); (C.B.); (J.M.); (T.T.); (M.W.C.)
| | - Jack Mellors
- Nuffield Department of Medicine, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK; (A.H.); (C.B.); (J.M.); (T.T.); (M.W.C.)
- National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, UK
- Department of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool L69 7ZX, UK
| | - Tom Tipton
- Nuffield Department of Medicine, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK; (A.H.); (C.B.); (J.M.); (T.T.); (M.W.C.)
| | - Miles W. Carroll
- Nuffield Department of Medicine, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK; (A.H.); (C.B.); (J.M.); (T.T.); (M.W.C.)
- National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, UK
| | - Stephanie Longet
- Nuffield Department of Medicine, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK; (A.H.); (C.B.); (J.M.); (T.T.); (M.W.C.)
- Correspondence: ; Tel.: +44-18-6561-7892
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17
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Plant-based vaccine research development against viral diseases with emphasis on Ebola virus disease: A review study. Curr Opin Pharmacol 2021; 60:261-267. [PMID: 34481336 DOI: 10.1016/j.coph.2021.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 11/21/2022]
Abstract
Ebola virus infection results in the fast onset of severe acute haemorrhagic fever with high mortality. The Ebola virus is labelled as a category A pathogen. Vaccines against the Ebola virus (EBOV) are essential for everyone, and an expansion in the arena of vaccine synthesis; especially, plant-based vaccine development has drawn attention. To express the heterologous protein for plant-based vectors, both RNA and DNA viruses have been adapted. Among the different approaches of plant-based vaccine technologies, the agroinfiltration method, which was initially established to investigate plant-virus interactions, has been considered an effective method to produce monoclonal antibodies against EBOV. The effectiveness of plants as bioreactors of vaccine/monoclonal antibodies development could be well-thought-out to attend the obligatory mandate. The review confers recent progress in the production of plant-based vaccines and antibody treatments against the Ebola virus disease, thereby alleviating public health alarms associated with EBOV.
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18
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Liu G, Cao W, Salawudeen A, Zhu W, Emeterio K, Safronetz D, Banadyga L. Vesicular Stomatitis Virus: From Agricultural Pathogen to Vaccine Vector. Pathogens 2021; 10:1092. [PMID: 34578125 PMCID: PMC8470541 DOI: 10.3390/pathogens10091092] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 11/16/2022] Open
Abstract
Vesicular stomatitis virus (VSV), which belongs to the Vesiculovirus genus of the family Rhabdoviridae, is a well studied livestock pathogen and prototypic non-segmented, negative-sense RNA virus. Although VSV is responsible for causing economically significant outbreaks of vesicular stomatitis in cattle, horses, and swine, the virus also represents a valuable research tool for molecular biologists and virologists. Indeed, the establishment of a reverse genetics system for the recovery of infectious VSV from cDNA transformed the utility of this virus and paved the way for its use as a vaccine vector. A highly effective VSV-based vaccine against Ebola virus recently received clinical approval, and many other VSV-based vaccines have been developed, particularly for high-consequence viruses. This review seeks to provide a holistic but concise overview of VSV, covering the virus's ascension from perennial agricultural scourge to promising medical countermeasure, with a particular focus on vaccines.
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Affiliation(s)
- Guodong Liu
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
| | - Wenguang Cao
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
| | - Abdjeleel Salawudeen
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Wenjun Zhu
- Canadian Food Inspection Agency, National Centre for Foreign Animal Disease, Winnipeg, MB R3E 3M4, Canada
| | - Karla Emeterio
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - David Safronetz
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Logan Banadyga
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
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19
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Davis C, Tipton T, Sabir S, Aitken C, Bennett S, Becker S, Evans T, Fehling SK, Gunson R, Hall Y, Jackson C, Johanssen I, Kieny MP, Mcmenamin J, Spence E, Strecker T, Sykes C, Templeton K, Thorburn F, Peters E, Henao Restrepo AM, White B, Zambon M, Carroll MW, Thomson EC. Postexposure Prophylaxis With rVSV-ZEBOV Following Exposure to a Patient With Ebola Virus Disease Relapse in the United Kingdom: An Operational, Safety, and Immunogenicity Report. Clin Infect Dis 2021; 71:2872-2879. [PMID: 31784751 PMCID: PMC7778350 DOI: 10.1093/cid/ciz1165] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/28/2019] [Indexed: 12/16/2022] Open
Abstract
Background In October 2015, 65 people came into direct contact with a healthcare worker presenting with a late reactivation of Ebola virus disease (EVD) in the United Kingdom. Vaccination was offered to 45 individuals with an initial assessment of high exposure risk. Methods Approval for rapid expanded access to the recombinant vesicular stomatitis virus–Zaire Ebola virus (rVSV-ZEBOV) vaccine as an unlicensed emergency medicine was obtained from the relevant authorities. An observational follow-up study was carried out for 1 year following vaccination. Results Twenty-six of 45 individuals elected to receive vaccination between 10 and 11 October 2015 following written informed consent. By day 14, 39% had seroconverted, increasing to 87% by day 28 and 100% by 3 months, although these responses were not always sustained. Neutralizing antibody responses were detectable in 36% by day 14 and 73% at 12 months. Common side effects included fatigue, myalgia, headache, arthralgia, and fever. These were positively associated with glycoprotein-specific T-cell but not immunoglobulin (Ig) M or IgG antibody responses. No severe vaccine-related adverse events were reported. No one exposed to the virus became infected. Conclusions This paper reports the use of the rVSV-ZEBOV vaccine given as an emergency intervention to individuals exposed to a patient presenting with a late reactivation of EVD. The vaccine was relatively well tolerated, but a high percentage developed a fever ≥37.5°C, necessitating urgent screening for Ebola virus, and a small number developed persistent arthralgia.
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Affiliation(s)
- Chris Davis
- Medical Research Council-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Tom Tipton
- Porton Down, National Infection Service, Public Health England, Salisbury, United Kingdom
| | - Suleman Sabir
- Medical Research Council-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Celia Aitken
- West of Scotland Specialist Virology Centre, Glasgow Royal Infirmary, Glasgow, United Kingdom
| | - Susan Bennett
- West of Scotland Specialist Virology Centre, Glasgow Royal Infirmary, Glasgow, United Kingdom
| | - Stephan Becker
- Institute of Virology, Philipps University Marburg, Marburg, Germany
| | - Tom Evans
- Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | | | - Rory Gunson
- West of Scotland Specialist Virology Centre, Glasgow Royal Infirmary, Glasgow, United Kingdom
| | - Yper Hall
- Porton Down, National Infection Service, Public Health England, Salisbury, United Kingdom
| | - Celia Jackson
- West of Scotland Specialist Virology Centre, Glasgow Royal Infirmary, Glasgow, United Kingdom.,Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | - Ingolfur Johanssen
- Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Marie Paule Kieny
- World Health Organization, Geneva, Switzerland.,Inserm, Paris, France
| | | | - Elizabeth Spence
- Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | - Thomas Strecker
- Institute of Virology, Philipps University Marburg, Marburg, Germany
| | - Catie Sykes
- Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | - Kate Templeton
- Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Fiona Thorburn
- West of Scotland Specialist Virology Centre, Glasgow Royal Infirmary, Glasgow, United Kingdom.,Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | - Erica Peters
- Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | | | - Beth White
- Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | - Maria Zambon
- Public Health England Colindale, London, United Kingdom
| | - Miles W Carroll
- Porton Down, National Infection Service, Public Health England, Salisbury, United Kingdom
| | - Emma C Thomson
- Medical Research Council-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom.,Department of Infectious Diseases, Queen Elizabeth University Hospital, Glasgow, United Kingdom
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20
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Longet S, Mellors J, Carroll MW, Tipton T. Ebolavirus: Comparison of Survivor Immunology and Animal Models in the Search for a Correlate of Protection. Front Immunol 2021; 11:599568. [PMID: 33679690 PMCID: PMC7935512 DOI: 10.3389/fimmu.2020.599568] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 12/29/2020] [Indexed: 01/21/2023] Open
Abstract
Ebola viruses are enveloped, single-stranded RNA viruses belonging to the Filoviridae family and can cause Ebola virus disease (EVD), a serious haemorrhagic illness with up to 90% mortality. The disease was first detected in Zaire (currently the Democratic Republic of Congo) in 1976. Since its discovery, Ebola virus has caused sporadic outbreaks in Africa and was responsible for the largest 2013-2016 EVD epidemic in West Africa, which resulted in more than 28,600 cases and over 11,300 deaths. This epidemic strengthened international scientific efforts to contain the virus and develop therapeutics and vaccines. Immunology studies in animal models and survivors, as well as clinical trials have been crucial to understand Ebola virus pathogenesis and host immune responses, which has supported vaccine development. This review discusses the major findings that have emerged from animal models, studies in survivors and vaccine clinical trials and explains how these investigations have helped in the search for a correlate of protection.
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Affiliation(s)
- Stephanie Longet
- Public Health England, National Infection Service, Salisbury, United Kingdom
| | - Jack Mellors
- Public Health England, National Infection Service, Salisbury, United Kingdom
| | - Miles W. Carroll
- Public Health England, National Infection Service, Salisbury, United Kingdom
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Tom Tipton
- Public Health England, National Infection Service, Salisbury, United Kingdom
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21
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Sasso E, D'Alise AM, Zambrano N, Scarselli E, Folgori A, Nicosia A. New viral vectors for infectious diseases and cancer. Semin Immunol 2020; 50:101430. [PMID: 33262065 DOI: 10.1016/j.smim.2020.101430] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 10/23/2020] [Accepted: 11/16/2020] [Indexed: 12/12/2022]
Abstract
Since the discovery in 1796 by Edward Jenner of vaccinia virus as a way to prevent and finally eradicate smallpox, the concept of using a virus to fight another virus has evolved into the current approaches of viral vectored genetic vaccines. In recent years, key improvements to the vaccinia virus leading to a safer version (Modified Vaccinia Ankara, MVA) and the discovery that some viruses can be used as carriers of heterologous genes encoding for pathological antigens of other infectious agents (the concept of 'viral vectors') has spurred a new wave of clinical research potentially providing for a solution for the long sought after vaccines against major diseases such as HIV, TB, RSV and Malaria, or emerging infectious diseases including those caused by filoviruses and coronaviruses. The unique ability of some of these viral vectors to stimulate the cellular arm of the immune response and, most importantly, T lymphocytes with cell killing activity, has also reawakened the interest toward developing therapeutic vaccines against chronic infectious diseases and cancer. To this end, existing vectors such as those based on Adenoviruses have been improved in immunogenicity and efficacy. Along the same line, new vectors that exploit viruses such as Vesicular Stomatitis Virus (VSV), Measles Virus (MV), Lymphocytic choriomeningitis virus (LCMV), cytomegalovirus (CMV), and Herpes Simplex Virus (HSV), have emerged. Furthermore, technological progress toward modifying their genome to render some of these vectors incompetent for replication has increased confidence toward their use in infant and elderly populations. Lastly, their production process being the same for every product has made viral vectored vaccines the technology of choice for rapid development of vaccines against emerging diseases and for 'personalised' cancer vaccines where there is an absolute need to reduce time to the patient from months to weeks or days. Here we review the recent developments in viral vector technologies, focusing on novel vectors based on primate derived Adenoviruses and Poxviruses, Rhabdoviruses, Paramixoviruses, Arenaviruses and Herpesviruses. We describe the rationale for, immunologic mechanisms involved in, and design of viral vectored gene vaccines under development and discuss the potential utility of these novel genetic vaccine approaches in eliciting protection against infectious diseases and cancer.
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Affiliation(s)
- Emanuele Sasso
- Nouscom srl, Via di Castel Romano 100, 00128 Rome, Italy; Ceinge-Biotecnologie Avanzate S.C. A.R.L., via Gaetano Salvatore 486, 80145 Naples, Italy.
| | | | - Nicola Zambrano
- Ceinge-Biotecnologie Avanzate S.C. A.R.L., via Gaetano Salvatore 486, 80145 Naples, Italy; Department of Molecular Medicine and Medical Biotechnology, University Federico II, Via Pansini 5, 80131 Naples, Italy.
| | | | | | - Alfredo Nicosia
- Ceinge-Biotecnologie Avanzate S.C. A.R.L., via Gaetano Salvatore 486, 80145 Naples, Italy; Department of Molecular Medicine and Medical Biotechnology, University Federico II, Via Pansini 5, 80131 Naples, Italy.
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22
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Kuroda M, Halfmann P, Kawaoka Y. HER2-mediated enhancement of Ebola virus entry. PLoS Pathog 2020; 16:e1008900. [PMID: 33052961 PMCID: PMC7556532 DOI: 10.1371/journal.ppat.1008900] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 08/17/2020] [Indexed: 11/29/2022] Open
Abstract
Multiple cell surface molecules including TAM receptors (TYRO3, AXL, and MERTK), a family of tyrosine kinase receptors, can serve as attachment receptors for Ebola virus (EBOV) entry into cells. The interaction of these receptors with EBOV particles is believed to trigger the initial internalization events that lead to macropinocytosis. However, the details of how these interactions lead to EBOV internalization have yet to be elucidated. Here, we screened receptor tyrosine kinase (RTK) inhibitors for anti-EBOV activity by using our previously established biologically contained Ebola virus that lacks the VP30 gene (EBOVΔVP30) and identified several RTKs, including human epidermal growth factor receptor 2 (HER2), as potential targets of anti-EBOV inhibitors and as novel host factors that have a role in EBOV infection. Of these identified RTKs, it was only HER2 whose knockdown by siRNAs impaired EBOVΔVP30-induced AKT1 phosphorylation, an event that is required for AKT1 activation and subsequent macropinocytosis. Stable expression of HER2 resulted in constitutive activation of AKT1, resulting in the enhancement of EBOVΔVP30 growth, EBOV GP-mediated entry, and macropinocytosis. Moreover, we found that HER2 interacts with the TAM receptors, and in particular forms a complex with TYRO3 and EBOVΔVP30 particles on the cell surface. Interestingly, HER2 was required for EBOVΔVP30-induced TYRO3 and AKT1 activation, but the other TAM receptors (TYRO3 and MERTK) were not essential for EBOVΔVP30-induced HER2 and AKT1 activation. Our findings demonstrate that HER2 plays an important role in EBOV entry and provide novel insights for the development of therapeutics against the virus.
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Affiliation(s)
- Makoto Kuroda
- Department of Pathobiological Sciences, School of Veterinary Medicine, Influenza Research Institute, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Peter Halfmann
- Department of Pathobiological Sciences, School of Veterinary Medicine, Influenza Research Institute, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
| | - Yoshihiro Kawaoka
- Department of Pathobiological Sciences, School of Veterinary Medicine, Influenza Research Institute, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
- Department of Microbiology and Immunology, Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo, Japan
- Department of Special Pathogens, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Tokyo, Japan
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23
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To B or Not to B: Mechanisms of Protection Conferred by rVSV-EBOV-GP and the Roles of Innate and Adaptive Immunity. Microorganisms 2020; 8:microorganisms8101473. [PMID: 32992829 PMCID: PMC7600878 DOI: 10.3390/microorganisms8101473] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 12/28/2022] Open
Abstract
Zaire Ebola virus (EBOV) is a member of the Filoviridae family of negative sense, single-stranded RNA viruses. EBOV infection causes Ebola virus disease (EVD), characterized by coagulopathy, lymphopenia, and multi-organ failure, which can culminate in death. In 2019, the FDA approved the first vaccine against EBOV, a recombinant live-attenuated viral vector wherein the G protein of vesicular stomatitis virus is replaced with the glycoprotein (GP) of EBOV (rVSV-EBOV-GP, Ervebo® by Merck). This vaccine demonstrates high efficacy in nonhuman primates by providing prophylactic, rapid, and post-exposure protection. In humans, rVSV-EBOV-GP demonstrated 100% protection in several phase III clinical trials in over 10,000 individuals during the 2013–2016 West Africa epidemic. As of 2020, over 218,000 doses of rVSV-EBOV-GP have been administered to individuals with high risk of EBOV exposure. Despite licensure and robust preclinical studies, the mechanisms of rVSV-EBOV-GP-mediated protection are not fully understood. Such knowledge is crucial for understanding vaccine-mediated correlates of protection from EVD and to aid the further design and development of therapeutics against filoviruses. Here, we summarize the current literature regarding the host response to vaccination and EBOV exposure, and evidence regarding innate and adaptive immune mechanisms involved in rVSV-EBOV-GP-mediated protection, with a focus on the host transcriptional response. Current data strongly suggest a protective synergy between rapid innate and humoral immunity.
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Cross RW, Bornholdt ZA, Prasad AN, Geisbert JB, Borisevich V, Agans KN, Deer DJ, Melody K, Fenton KA, Feldmann H, Sprecher A, Zeitlin L, Geisbert TW. Prior vaccination with rVSV-ZEBOV does not interfere with but improves efficacy of postexposure antibody treatment. Nat Commun 2020; 11:3736. [PMID: 32719371 PMCID: PMC7385100 DOI: 10.1038/s41467-020-17446-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 07/01/2020] [Indexed: 11/09/2022] Open
Abstract
A replication-competent vesicular stomatitis virus vaccine expressing the Ebola virus (EBOV) glycoprotein (GP) (rVSV-ZEBOV) was successfully used during the 2013-16 EBOV epidemic. Additionally, chimeric and human monoclonal antibodies (mAb) against the EBOV GP have shown promise in animals and humans when administered therapeutically. Uncertainty exists regarding the efficacy of postexposure antibody treatments in the event of a known exposure of a recent rVSV-ZEBOV vaccinee. Here, we model a worst-case scenario using rhesus monkeys vaccinated or unvaccinated with the rVSV-ZEBOV vaccine. We demonstrate that animals challenged with a uniformly lethal dose of EBOV one day following vaccination, and then treated with the anti-EBOV GP mAb MIL77 starting 3 days postexposure show no evidence of clinical illness and survive challenge. In contrast, animals receiving only vaccination or only mAb-based therapy become ill, with decreased survival compared to animals vaccinated and subsequently treated with MIL77. These results suggest that rVSV-ZEBOV augments immunotherapy.
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MESH Headings
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Viral/administration & dosage
- Antibodies, Viral/immunology
- Antibodies, Viral/therapeutic use
- Ebola Vaccines/immunology
- Hemorrhagic Fever, Ebola/immunology
- Hemorrhagic Fever, Ebola/pathology
- Hemorrhagic Fever, Ebola/prevention & control
- Hemorrhagic Fever, Ebola/virology
- Humans
- Immunoglobulin G/blood
- Immunoglobulin M/blood
- Kaplan-Meier Estimate
- Macaca mulatta
- Post-Exposure Prophylaxis
- Treatment Outcome
- Vaccination
- Vesicular stomatitis Indiana virus/immunology
- Viral Load/immunology
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Affiliation(s)
- Robert W Cross
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Zachary A Bornholdt
- Mapp Biopharmaceutical Inc., 6160 Lusk Blvd Ste C200, San Diego, CA, 92121, USA
| | - Abhishek N Prasad
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Joan B Geisbert
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Viktoriya Borisevich
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Krystle N Agans
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Daniel J Deer
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Kevin Melody
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Karla A Fenton
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, NIAID/NIH, Hamilton, MT, 59840, USA
| | - Armand Sprecher
- Médecins Sans Frontières, Rue Arbre Benit 46, 1050, Brussels, Belgium
| | - Larry Zeitlin
- Mapp Biopharmaceutical Inc., 6160 Lusk Blvd Ste C200, San Diego, CA, 92121, USA
| | - Thomas W Geisbert
- Galveston National Laboratory, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA.
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX, 77555-0610, USA.
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25
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Matz KM, Marzi A, Feldmann H. Ebola vaccine trials: progress in vaccine safety and immunogenicity. Expert Rev Vaccines 2020; 18:1229-1242. [PMID: 31779496 DOI: 10.1080/14760584.2019.1698952] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Introduction: Ebolaviruses are non-segmented negative-strand RNA viruses in the Filoviridae family that cause a neglected infectious disease designated as Ebola virus disease (EVD). The most prominent member is the Ebola virus (EBOV), representing the Zaire ebolavirus species that has been responsible for the largest reported EVD outbreaks including the West African epidemic and the current outbreak in the Democratic Republic of the Congo. Today, the most advanced EVD vaccine approaches target EBOV and multiple phase 1-4 human trials have been performed over the past few years. The most advanced platforms include vectored vaccines based on vesicular stomatitis virus (VSV-EBOV), distinct human (Ad5 and Ad26) and chimpanzee (ChAd3) adenoviruses and modified vaccinia Ankara (MVA) as well as DNA-based vaccines administered as a prime-only or homologous or combined prime-boost immunization.Areas covered: Here, we review and discuss human trials with a focus on vaccine safety and immunogenicity.Expert opinion: Despite obvious progress and promising success in EBOV vaccine development, many shortcomings and challenges remain to be tackled in the future.
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Affiliation(s)
- Keesha M Matz
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
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26
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Halperin SA, Das R, Onorato MT, Liu K, Martin J, Grant-Klein RJ, Nichols R, Coller BA, Helmond FA, Simon JK. Immunogenicity, Lot Consistency, and Extended Safety of rVSVΔG-ZEBOV-GP Vaccine: A Phase 3 Randomized, Double-Blind, Placebo-Controlled Study in Healthy Adults. J Infect Dis 2020; 220:1127-1135. [PMID: 31505665 PMCID: PMC6812306 DOI: 10.1093/infdis/jiz241] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 05/17/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND This double-blind study assessed immunogenicity, lot consistency, and safety of recombinant vesicular stomatitis virus-Zaire Ebola virus envelope glycoprotein vaccine (rVSVΔG-ZEBOV-GP). METHODS Healthy adults (N = 1197) were randomized 2:2:2:2:1 to receive 1 of 3 consistency lots of rVSVΔG-ZEBOV-GP (2 × 107 plaque-forming units [pfu]), high-dose 1 × 108 pfu, or placebo. Antibody responses pre-/postvaccination (28 days, 6 months; in a subset [n = 566], months 12, 18, and 24) were measured. post hoc analysis of risk factors associated with arthritis following vaccination was performed. RESULTS ZEBOV-GP enzyme-linked immunosorbent assay (ELISA) geometric mean titers (GMTs) increased postvaccination in all rVSVΔG-ZEBOV-GP groups by 28 days (>58-fold) and persisted through 24 months. The 3 manufacturing lots demonstrated equivalent immunogenicity at 28 days. Neutralizing antibody GMTs increased by 28 days in all rVSVΔG-ZEBOV-GP groups, peaking at 18 months with no decrease through 24 months. At 28 days, ≥94% of vaccine recipients seroresponded (ZEBOV-GP ELISA, ≥2-fold increase, titer ≥200 EU/mL), with responses persisting at 24 months in ≥91%. Female sex and a history of arthritis were identified as potential risk factors for the development of arthritis postvaccination. CONCLUSIONS Immune responses to rVSVΔG-ZEBOV-GP persisted to 24 months. Immunogenicity and safety results support continued rVSVΔG-ZEBOV-GP development. CLINICAL TRIALS REGISTRATION NCT02503202.
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Affiliation(s)
- Scott A Halperin
- Canadian Center for Vaccinology, Dalhousie University, IWK Health Centre, and Nova Scotia Health Authority, Halifax, Canada
| | | | | | | | | | | | - Rick Nichols
- NewLink Genetics, Inc., BioProtection Systems, Ames, Iowa
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O’Connell AK, Douam F. Humanized Mice for Live-Attenuated Vaccine Research: From Unmet Potential to New Promises. Vaccines (Basel) 2020; 8:E36. [PMID: 31973073 PMCID: PMC7157703 DOI: 10.3390/vaccines8010036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 01/24/2023] Open
Abstract
Live-attenuated vaccines (LAV) represent one of the most important medical innovations in human history. In the past three centuries, LAV have saved hundreds of millions of lives, and will continue to do so for many decades to come. Interestingly, the most successful LAVs, such as the smallpox vaccine, the measles vaccine, and the yellow fever vaccine, have been isolated and/or developed in a purely empirical manner without any understanding of the immunological mechanisms they trigger. Today, the mechanisms governing potent LAV immunogenicity and long-term induced protective immunity continue to be elusive, and therefore hamper the rational design of innovative vaccine strategies. A serious roadblock to understanding LAV-induced immunity has been the lack of suitable and cost-effective animal models that can accurately mimic human immune responses. In the last two decades, human-immune system mice (HIS mice), i.e., mice engrafted with components of the human immune system, have been instrumental in investigating the life-cycle and immune responses to multiple human-tropic pathogens. However, their use in LAV research has remained limited. Here, we discuss the strong potential of LAVs as tools to enhance our understanding of human immunity and review the past, current and future contributions of HIS mice to this endeavor.
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Affiliation(s)
| | - Florian Douam
- Department of Microbiology, National Emerging Infectious Diseases Laboratories, Boston University School of Medicine, Boston, MA 02118, USA;
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28
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Logue J, Crozier I, Jahrling PB, Kuhn JH. Post-exposure prophylactic vaccine candidates for the treatment of human Risk Group 4 pathogen infections. Expert Rev Vaccines 2020; 19:85-103. [PMID: 31937163 PMCID: PMC7011290 DOI: 10.1080/14760584.2020.1713756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 01/07/2020] [Indexed: 12/30/2022]
Abstract
Introduction: The development of therapeutics and vaccines to combat Risk Group 4 pathogens, which are associated with high case-fatality rates, is a high priority. Postexposure prophylactic vaccines have the potential to bridge classical therapeutic and vaccine applications, but little progress has been reported to date.Areas covered: This review provides an overview of postexposure prophylactic vaccine candidates against Risk Group 4 pathogens.Expert opinion: A few candidate postexposure prophylactic vaccines protect experimental animals infected with a few Risk Group 4 pathogens, such as filoviruses or hantaviruses, but the efficacy of candidate vaccines has not been similarly reported for most other high-consequence pathogens. A major drawback for the further development of existing candidates is the lack of understanding of their mechanisms of action, knowledge of which could help to identify focused paths forward in vaccine development and licensure. These drawbacks to further development ultimately slow progress toward postexposure prophylactic vaccine licensure.
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Affiliation(s)
- James Logue
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Frederick, MD, USA
| | - Ian Crozier
- Integrated Research Facility at Fort Detrick, Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, MD, USA
| | - Peter B Jahrling
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Frederick, MD, USA
| | - Jens H Kuhn
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Frederick, MD, USA
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29
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Schwartz DA. Maternal and Infant Death and the rVSV-ZEBOV Vaccine Through Three Recent Ebola Virus Epidemics-West Africa, DRC Équateur and DRC Kivu: 4 Years of Excluding Pregnant and Lactating Women and Their Infants from Immunization. CURRENT TROPICAL MEDICINE REPORTS 2019. [DOI: 10.1007/s40475-019-00195-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Abstract
Purpose of Review
Ebola virus infection has one of the highest overall case fatality rates of any viral disease. It has historically had an especially high case mortality rate among pregnant women and infants—greater than 90% for pregnant women in some outbreaks and close to 100 % in fetuses and newborns. The Merck recombinant vaccine against Ebola virus, termed rVSV-ZEBOV, underwent clinical trials during the 2013–2015 West Africa Ebola epidemic where it was found to be 100% efficacious. It was subsequently used during the 2018 DRC Équateur outbreak and in the 2018 DRC Kivu Ebola which is still ongoing, where its efficacy is 97.5 %. Pregnant and lactating women and their infants have previously been excluded from the design, clinical trials, and administration of many vaccines and drugs. This article critically examines the development of the rVSV-ZEBOV vaccine and its accessibility to pregnant and lactating women and infants as a life-saving form of prevention through three recent African Ebola epidemics—West Africa, DRC Équateur, and DRC Kivu.
Recent Findings
Pregnant and lactating women and their infants were excluded from participation in the clinical trials of rVSV-ZEBOV conducted during the West Africa epidemic. This policy of exclusion was continued with the occurrence of the DRC Équateur outbreak in 2018, in spite of calls from the public health and global maternal health communities to vaccinate this population. Following the onset of the DRC Kivu epidemic, the exclusion persisted. Eventually, the policy was reversed to include vaccination of pregnant and lactating women. However, it was not implemented until June 2019, 10 months after the start of the epidemic, placing hundreds of women and infants at risk for this highly fatal infection.
Summary
The historical policy of excluding pregnant and lactating women and infants from vaccine design, clinical trials, and implementation places them at risk, especially in situations of infectious disease outbreaks. In the future, all pregnant women, regardless of trimester, breastfeeding mothers, and infants, should have access to the Ebola vaccine.
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30
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Suschak JJ, Schmaljohn CS. Vaccines against Ebola virus and Marburg virus: recent advances and promising candidates. Hum Vaccin Immunother 2019; 15:2359-2377. [PMID: 31589088 DOI: 10.1080/21645515.2019.1651140] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The filoviruses Ebola virus and Marburg virus are among the most dangerous pathogens in the world. Both viruses cause viral hemorrhagic fever, with case fatality rates of up to 90%. Historically, filovirus outbreaks had been relatively small, with only a few hundred cases reported. However, the recent West African Ebola virus outbreak underscored the threat that filoviruses pose. The three year-long outbreak resulted in 28,646 Ebola virus infections and 11,323 deaths. The lack of Food and Drug Administration (FDA) licensed vaccines and antiviral drugs hindered early efforts to contain the outbreak. In response, the global scientific community has spurred the advanced development of many filovirus vaccine candidates. Novel vaccine platforms, such as viral vectors and DNA vaccines, have emerged, leading to the investigation of candidate vaccines that have demonstrated protective efficacy in small animal and nonhuman primate studies. Here, we will discuss several of these vaccine platforms with a particular focus on approaches that have advanced into clinical development.
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Affiliation(s)
- John J Suschak
- Virology Division, U.S. Army Medical Research Institute of Infectious Diseases , Fort Detrick , MD , USA
| | - Connie S Schmaljohn
- Headquarters Division, U.S. Army Medical Research Institute of Infectious Diseases , Fort Detrick , MD , USA
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31
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Fathi A, Dahlke C, Addo MM. Recombinant vesicular stomatitis virus vector vaccines for WHO blueprint priority pathogens. Hum Vaccin Immunother 2019; 15:2269-2285. [PMID: 31368826 PMCID: PMC6816421 DOI: 10.1080/21645515.2019.1649532] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The devastating Ebola virus (EBOV) outbreak in West Africa in 2013-2016 has flagged the need for the timely development of vaccines for high-threat pathogens. To be better prepared for new epidemics, the WHO has compiled a list of priority pathogens that are likely to cause future outbreaks and for which R&D efforts are, therefore, paramount (R&D Blueprint: https://www.who.int/blueprint/priority-diseases/en/ ). To this end, the detailed characterization of vaccine platforms is needed. The vesicular stomatitis virus (VSV) has been established as a robust vaccine vector backbone for infectious diseases for well over a decade. The recent clinical trials testing the vaccine candidate VSV-EBOV against EBOV disease now have added a substantial amount of clinical data and suggest VSV to be an ideal vaccine vector candidate for outbreak pathogens. In this review, we discuss insights gained from the clinical VSV-EBOV vaccine trials as well as from animal studies investigating vaccine candidates for Blueprint pathogens.
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Affiliation(s)
- Anahita Fathi
- Department of Medicine, Division of Infectious Diseases, University Medical-Center Hamburg-Eppendorf , Hamburg , Germany.,Department for Clinical Immunology of Infectious Diseases, Bernhard Nocht Institute for Tropical Medicine , Hamburg , Germany.,German Center for Infection Research, Hamburg-Lübeck-Borstel-Riems , Germany
| | - Christine Dahlke
- Department of Medicine, Division of Infectious Diseases, University Medical-Center Hamburg-Eppendorf , Hamburg , Germany.,Department for Clinical Immunology of Infectious Diseases, Bernhard Nocht Institute for Tropical Medicine , Hamburg , Germany.,German Center for Infection Research, Hamburg-Lübeck-Borstel-Riems , Germany
| | - Marylyn M Addo
- Department of Medicine, Division of Infectious Diseases, University Medical-Center Hamburg-Eppendorf , Hamburg , Germany.,Department for Clinical Immunology of Infectious Diseases, Bernhard Nocht Institute for Tropical Medicine , Hamburg , Germany.,German Center for Infection Research, Hamburg-Lübeck-Borstel-Riems , Germany
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32
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Therapeutic strategies to target the Ebola virus life cycle. Nat Rev Microbiol 2019; 17:593-606. [DOI: 10.1038/s41579-019-0233-2] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2019] [Indexed: 02/07/2023]
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Abstract
Ebola virus (EBOV) is a single-stranded RNA virus that causes Ebola virus disease (EVD), characterized by excessive inflammation, lymphocyte apoptosis, hemorrhage, and coagulation defects leading to multiorgan failure and shock. Recombinant vesicular stomatitis virus expressing the EBOV glycoprotein (VSV-EBOV), which is highly efficacious against lethal challenge in nonhuman primates, is the only vaccine that successfully completed a phase III clinical trial. Additional studies showed VSV-EBOV provides complete and partial protection to macaques immunized 7 and 3 days before EBOV challenge, respectively. However, the mechanisms by which this live-attenuated vaccine elicits rapid protection are only partially understood. To address this, we carried out a longitudinal transcriptome analysis of host responses in whole-blood samples collected from cynomolgus macaques vaccinated with VSV-EBOV 28, 21, 14, 7, and 3 days before EBOV challenge. Our findings indicate the transcriptional response to the vaccine peaks 7 days following vaccination and contains signatures of both innate antiviral immunity as well as B-cell activation. EBOV challenge 1 week after vaccination resulted in large gene expression changes suggestive of a recall adaptive immune response 14 days postchallenge. Lastly, the timing and magnitude of innate immunity and interferon-stimulated gene expression correlated with viral burden and disease outcome in animals vaccinated 3 days before challenge.IMPORTANCE Ebola virus (EBOV) is the causative agent of Ebola virus disease (EVD), a deadly disease and major public health threat worldwide. A safe and highly efficacious vesicular stomatitis virus-based vaccine against EBOV is the only platform that has successfully completed phase III clinical trials and has been used in recent and ongoing outbreaks. Earlier studies showed that antibodies are the main mode of protection when this vaccine is administered 28 days before EBOV challenge. Recently, we showed this vaccine can provide protection when administered as early as 3 days before challenge and before antibodies are detected. This study seeks to identify the mechanisms of rapid protection, which in turn will pave the way for improved vaccines and therapeutics. Additionally, this study provides insight into host gene expression signatures that could provide early biomarkers to identify infected individuals who are at highest risk of poor outcomes.
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34
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Gallagher T, Lipsitch M. Postexposure Effects of Vaccines on Infectious Diseases. Epidemiol Rev 2019; 41:13-27. [PMID: 31680134 PMCID: PMC7159179 DOI: 10.1093/epirev/mxz014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 10/04/2019] [Accepted: 10/21/2019] [Indexed: 12/18/2022] Open
Abstract
We searched the PubMed database for clinical trials and observational human studies about postexposure vaccination effects, targeting infections with approved vaccines and vaccines licensed outside the United States against dengue, hepatitis E, malaria, and tick-borne encephalitis. Studies of animal models, serologic testing, and pipeline vaccines were excluded. Eligible studies were evaluated by definition of exposure; attempts to distinguish pre- and postexposure effects were rated on a scale of 1 to 4. We screened 4,518 articles and ultimately identified for this review 14 clinical trials and 31 observational studies spanning 7 of the 28 vaccine-preventable diseases. For secondary attack rate, the following medians were found for postexposure vaccination effectiveness: hepatitis A, 85% (interquartile range (IQR), 28; n = 5 sources); hepatitis B, 85% (IQR, 22; n = 5 sources); measles, 83% (IQR, 21; n = 8 sources); varicella, 67% (IQR: 48; n = 9 sources); smallpox, 45% (IQR, 39; n = 4 sources); and mumps, 38% (IQR, 7; n = 2 sources). For case fatality proportions resulting from rabies and smallpox, the median vaccine postexposure efficacies were 100% (IQR, 0; n = 6 sources) and 63% (IQR, 50; n = 8 sources), respectively. Many available vaccines can modify or preclude disease if administered after exposure. This postexposure effectiveness could be important to consider during vaccine trials and while developing new vaccines.
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Affiliation(s)
- Tara Gallagher
- Dartmouth College Department of Physics and Astronomy, Hanover, New Hampshire
| | - Marc Lipsitch
- Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts
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35
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Schindell BG, Webb AL, Kindrachuk J. Persistence and Sexual Transmission of Filoviruses. Viruses 2018; 10:E683. [PMID: 30513823 PMCID: PMC6316729 DOI: 10.3390/v10120683] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 11/16/2018] [Accepted: 11/20/2018] [Indexed: 12/27/2022] Open
Abstract
There is an increasing frequency of reports regarding the persistence of the Ebola virus (EBOV) in Ebola virus disease (EVD) survivors. During the 2014⁻2016 West African EVD epidemic, sporadic transmission events resulted in the initiation of new chains of human-to-human transmission. Multiple reports strongly suggest that these re-emergences were linked to persistent EBOV infections and included sexual transmission from EVD survivors. Asymptomatic infection and long-term viral persistence in EVD survivors could result in incidental introductions of the Ebola virus in new geographic regions and raise important national and local public health concerns. Alarmingly, although the persistence of filoviruses and their potential for sexual transmission have been documented since the emergence of such viruses in 1967, there is limited knowledge regarding the events that result in filovirus transmission to, and persistence within, the male reproductive tract. Asymptomatic infection and long-term viral persistence in male EVD survivors could lead to incidental transfer of EBOV to new geographic regions, thereby generating widespread outbreaks that constitute a significant threat to national and global public health. Here, we review filovirus testicular persistence and discuss the current state of knowledge regarding the rates of persistence in male survivors, and mechanisms underlying reproductive tract localization and sexual transmission.
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Affiliation(s)
- Brayden G Schindell
- Laboratory of Emerging and Re-Emerging Viruses, Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB R3E 0J9, Canada.
| | - Andrew L Webb
- Laboratory of Emerging and Re-Emerging Viruses, Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB R3E 0J9, Canada.
| | - Jason Kindrachuk
- Laboratory of Emerging and Re-Emerging Viruses, Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB R3E 0J9, Canada.
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Suder E, Furuyama W, Feldmann H, Marzi A, de Wit E. The vesicular stomatitis virus-based Ebola virus vaccine: From concept to clinical trials. Hum Vaccin Immunother 2018; 14:2107-2113. [PMID: 29757706 PMCID: PMC6183239 DOI: 10.1080/21645515.2018.1473698] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 04/30/2018] [Indexed: 10/25/2022] Open
Abstract
The devastating Ebola virus (EBOV) epidemic in West Africa in 2013-2016 accelerated the progress of several vaccines and antivirals through clinical trials, including the replication-competent vesicular stomatitis virus-based vaccine expressing the EBOV glycoprotein (VSV-EBOV). Extensive preclinical testing in animal models demonstrated the prophylactic and post-exposure efficacy of this vaccine, identified the mechanism of protection, and suggested it was safe for human use. Based on these data, VSV-EBOV was extensively tested in phase 1-3 clinical trials in North America, Europe and Africa. Although some side effects of vaccination were observed, these clinical trials showed that the VSV-EBOV was safe and immunogenic in humans. Moreover, the data supported the use of VSV-EBOV as an emergency vaccine in individuals at risk for Ebola virus disease. In this review, we summarize the results of the extensive preclinical and clinical testing of the VSV-EBOV vaccine.
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MESH Headings
- Animals
- Clinical Trials as Topic
- Drug Carriers
- Drug Evaluation, Preclinical
- Drug-Related Side Effects and Adverse Reactions/epidemiology
- Drug-Related Side Effects and Adverse Reactions/pathology
- Ebola Vaccines/administration & dosage
- Ebola Vaccines/genetics
- Ebola Vaccines/immunology
- Ebola Vaccines/isolation & purification
- Hemorrhagic Fever, Ebola/prevention & control
- Humans
- Vaccines, Attenuated/administration & dosage
- Vaccines, Attenuated/genetics
- Vaccines, Attenuated/immunology
- Vaccines, Attenuated/isolation & purification
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Synthetic/isolation & purification
- Vesiculovirus/genetics
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Affiliation(s)
- Ellen Suder
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Wakako Furuyama
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Heinz Feldmann
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Andrea Marzi
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
| | - Emmie de Wit
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, MT, USA
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Locher S, Schweneker M, Hausmann J, Zimmer G. Immunogenicity of propagation-restricted vesicular stomatitis virus encoding Ebola virus glycoprotein in guinea pigs. J Gen Virol 2018; 99:866-879. [PMID: 29869979 PMCID: PMC6152369 DOI: 10.1099/jgv.0.001085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Vesicular stomatitis virus (VSV) expressing the Ebola virus (EBOV) glycoprotein (GP) in place of the VSV glycoprotein G (VSV/EBOV-GP) is a promising EBOV vaccine candidate which has already entered clinical phase 3 studies. Although this chimeric virus was tolerated overall by volunteers, it still caused viremia and adverse effects such as fever and arthritis, suggesting that it might not be sufficiently attenuated. In this study, the VSV/EBOV-GP vector was further modified in order to achieve attenuation while maintaining immunogenicity. All recombinant VSV constructs were propagated on VSV G protein expressing helper cells and used to immunize guinea pigs via the intramuscular route. The humoral immune response was analysed by EBOV-GP-specific fluorescence-linked immunosorbent assay, plaque reduction neutralization test and in vitro virus-spreading inhibition test that employed recombinant VSV/EBOV-GP expressing either green fluorescent protein or secreted Nano luciferase. Most modified vector constructs induced lower levels of protective antibodies than the parental VSV/EBOV-GP or a recombinant modified vaccinia virus Ankara vector encoding full-length EBOV-GP. However, the VSV/EBOV-GP(F88A) mutant was at least as immunogenic as the parental vaccine virus although it was highly propagation-restricted. This finding suggests that VSV-vectored vaccines need not be propagation-competent to induce a robust humoral immune response. However, VSV/EBOV-GP(F88A) rapidly reverted to a fully propagation-competent virus indicating that a single-point mutation is not sufficient to maintain the propagation-restricted phenotype.
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Affiliation(s)
- Samira Locher
- Institut für Virologie und Immunologie (IVI), Sensemattstrasse 293, CH-3147 Mittelhäusern, Switzerland
| | - Marc Schweneker
- Bavarian Nordic GmbH, Fraunhoferstraße 13, D-82152 Martinsried, Germany
| | - Jürgen Hausmann
- Bavarian Nordic GmbH, Fraunhoferstraße 13, D-82152 Martinsried, Germany
| | - Gert Zimmer
- Institut für Virologie und Immunologie (IVI), Sensemattstrasse 293, CH-3147 Mittelhäusern, Switzerland
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Zemp F, Rajwani J, Mahoney DJ. Rhabdoviruses as vaccine platforms for infectious disease and cancer. Biotechnol Genet Eng Rev 2018; 34:122-138. [PMID: 29781359 DOI: 10.1080/02648725.2018.1474320] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The family Rhabdoviridae (RV) comprises a large, genetically diverse collection of single-stranded, negative sense RNA viruses from the order Mononegavirales. Several RV members are being developed as live-attenuated vaccine vectors for the prevention or treatment of infectious disease and cancer. These include the prototype recombinant Vesicular Stomatitis Virus (rVSV) and the more recently developed recombinant Maraba Virus, both species within the genus Vesiculoviridae. A relatively strong safety profile in humans, robust immunogenicity and genetic malleability are key features that make the RV family attractive vaccine platforms. Currently, the rVSV vector is in preclinical development for vaccination against numerous high-priority infectious diseases, with clinical evaluation underway for HIV/AIDS and Ebola virus disease. Indeed, the success of the rVSV-ZEBOV vaccine during the 2014-15 Ebola virus outbreak in West Africa highlights the therapeutic potential of rVSV as a vaccine vector for acute, life-threatening viral illnesses. The rVSV and rMaraba platforms are also being tested as 'oncolytic' cancer vaccines in a series of phase 1-2 clinical trials, after being proven effective at eliciting immune-mediated tumour regression in preclinical mouse models. In this review, we discuss the biological and genetic features that make RVs attractive vaccine platforms and the development and ongoing testing of rVSV and rMaraba strains as vaccine vectors for infectious disease and cancer.
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Affiliation(s)
- Franz Zemp
- a Alberta Children's Hospital Research Institute , Calgary , Canada.,b Charbonneau Cancer Research Institute , Calgary , Canada
| | - Jahanara Rajwani
- a Alberta Children's Hospital Research Institute , Calgary , Canada.,b Charbonneau Cancer Research Institute , Calgary , Canada.,d Department of Biochemistry and Molecular Biology, Faculty of Medicine , University of Calgary , Calgary , Canada
| | - Douglas J Mahoney
- a Alberta Children's Hospital Research Institute , Calgary , Canada.,b Charbonneau Cancer Research Institute , Calgary , Canada.,c Department of Microbiology, Immunology and Infectious Disease , Faculty of Medicine , University of Calgary , Calgary , Canada.,d Department of Biochemistry and Molecular Biology, Faculty of Medicine , University of Calgary , Calgary , Canada
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Rechtien A, Richert L, Lorenzo H, Martrus G, Hejblum B, Dahlke C, Kasonta R, Zinser M, Stubbe H, Matschl U, Lohse A, Krähling V, Eickmann M, Becker S, Thiébaut R, Altfeld M, Addo MM. Systems Vaccinology Identifies an Early Innate Immune Signature as a Correlate of Antibody Responses to the Ebola Vaccine rVSV-ZEBOV. Cell Rep 2018; 20:2251-2261. [PMID: 28854372 PMCID: PMC5583508 DOI: 10.1016/j.celrep.2017.08.023] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 06/21/2017] [Accepted: 08/02/2017] [Indexed: 01/15/2023] Open
Abstract
Predicting vaccine efficacy remains a challenge. We used a systems vaccinology approach to identify early innate immune correlates of antibody induction in humans receiving the Ebola vaccine rVSV-ZEBOV. Blood samples from days 0, 1, 3, 7, and 14 were analyzed for changes in cytokine levels, innate immune cell subsets, and gene expression. Integrative statistical analyses with cross-validation identified a signature of 5 early innate markers correlating with antibody titers on day 28 and beyond. Among those, IP-10 on day 3 and MFI of CXCR6 on NK cells on day 1 were independent correlates. Consistently, we found an early gene expression signature linked to IP-10. This comprehensive characterization of early innate immune responses to the rVSV-ZEBOV vaccine in humans revealed immune signatures linked to IP-10. These results suggest correlates of vaccine-induced antibody induction and provide a rationale to explore strategies for augmenting the effectiveness of vaccines through manipulation of IP-10. 5 early innate markers correlate with antibody response to Ebola vaccine rVSV-ZEBOV IP-10 on day 3 after vaccination is an independent correlate of antibody induction RNA-seq analysis identifies early gene expression signature linked to IP-10
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Affiliation(s)
- Anne Rechtien
- University Medical Center Hamburg-Eppendorf, 1(st) Department of Medicine, 20246 Hamburg, Germany; German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, 20246 Hamburg, Germany; Heinrich Pette Institute, Leibniz Institute for Experimental Virology, 20251 Hamburg, Germany.
| | - Laura Richert
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, 20251 Hamburg, Germany; INSERM U1219, INRIA SISTM, Bordeaux University, Bordeaux, France; Vaccine Research Institute, Creteil, France
| | - Hadrien Lorenzo
- INSERM U1219, INRIA SISTM, Bordeaux University, Bordeaux, France; Vaccine Research Institute, Creteil, France
| | - Gloria Martrus
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, 20251 Hamburg, Germany
| | - Boris Hejblum
- INSERM U1219, INRIA SISTM, Bordeaux University, Bordeaux, France; Vaccine Research Institute, Creteil, France
| | - Christine Dahlke
- University Medical Center Hamburg-Eppendorf, 1(st) Department of Medicine, 20246 Hamburg, Germany; German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, 20246 Hamburg, Germany
| | - Rahel Kasonta
- University Medical Center Hamburg-Eppendorf, 1(st) Department of Medicine, 20246 Hamburg, Germany; German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, 20246 Hamburg, Germany
| | - Madeleine Zinser
- University Medical Center Hamburg-Eppendorf, 1(st) Department of Medicine, 20246 Hamburg, Germany
| | - Hans Stubbe
- German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, 20246 Hamburg, Germany; Division of Infectious Diseases, Department of Medicine IV, LMU, 80336 Munich, Germany
| | - Urte Matschl
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, 20251 Hamburg, Germany
| | - Ansgar Lohse
- University Medical Center Hamburg-Eppendorf, 1(st) Department of Medicine, 20246 Hamburg, Germany
| | - Verena Krähling
- Philipps University Marburg, Institute for Virology, 35043 Marburg, Germany
| | - Markus Eickmann
- Philipps University Marburg, Institute for Virology, 35043 Marburg, Germany
| | - Stephan Becker
- Philipps University Marburg, Institute for Virology, 35043 Marburg, Germany
| | | | - Rodolphe Thiébaut
- INSERM U1219, INRIA SISTM, Bordeaux University, Bordeaux, France; Vaccine Research Institute, Creteil, France
| | - Marcus Altfeld
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, 20251 Hamburg, Germany
| | - Marylyn M Addo
- University Medical Center Hamburg-Eppendorf, 1(st) Department of Medicine, 20246 Hamburg, Germany; German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, 20246 Hamburg, Germany.
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40
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Wong G, Mendoza EJ, Plummer FA, Gao GF, Kobinger GP, Qiu X. From bench to almost bedside: the long road to a licensed Ebola virus vaccine. Expert Opin Biol Ther 2018; 18:159-173. [PMID: 29148858 PMCID: PMC5841470 DOI: 10.1080/14712598.2018.1404572] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION The Ebola virus (EBOV) disease epidemic during 2014-16 in West Africa has accelerated the clinical development of several vaccine candidates that have demonstrated efficacy in the gold standard nonhuman primate (NHP) model, namely cynomolgus macaques. AREAS COVERED This review discusses the pre-clinical research and if available, clinical evaluation of the currently available EBOV vaccine candidates, while emphasizing the translatability of pre-clinical data generated in the NHP model to clinical data in humans. EXPERT OPINION Despite the existence of many successful EBOV vaccine candidates in the pre-clinical stages, only two platforms became the focus of Phase 2/3 efficacy trials in Liberia, Sierra Leone, and Guinea near the peak of the epidemic: the Vesicular stomatitis virus (VSV)-vectored vaccine and the chimpanzee adenovirus type 3 (ChAd3)-vectored vaccine. The results of three distinct clinical trials involving these candidates may soon pave the way for a licensed, safe and efficacious EBOV vaccine to help combat future epidemics.
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Affiliation(s)
- Gary Wong
- Guangdong Key Laboratory for Diagnosis and Treatment of Emerging Infectious Diseases, Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People’s Hospital, Shenzhen, China
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
- Department of Medical Microbiology, Winnipeg, MB, Canada
| | - Emelissa J. Mendoza
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | | | - George F. Gao
- Guangdong Key Laboratory for Diagnosis and Treatment of Emerging Infectious Diseases, Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People’s Hospital, Shenzhen, China
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing, China
| | - Gary P. Kobinger
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
- Department of Medical Microbiology, Winnipeg, MB, Canada
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
- Département de microbiologie-infectiologie et d’immunologie, Universite Laval, Quebec, QC, Canada
| | - Xiangguo Qiu
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
- Department of Medical Microbiology, Winnipeg, MB, Canada
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42
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Purcell O, Opdensteinen P, Chen W, Lowenhaupt K, Brown A, Hermann M, Cao J, Tenhaef N, Kallweit E, Kastilan R, Sinskey AJ, Perez-Pinera P, Buyel JF, Lu TK. Production of Functional Anti-Ebola Antibodies in Pichia pastoris. ACS Synth Biol 2017; 6:2183-2190. [PMID: 28786662 DOI: 10.1021/acssynbio.7b00234] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The 2013-2016 Ebola outbreak highlighted the limited treatment options and lack of rapid response strategies for emerging pathogen outbreaks. Here, we propose an efficient development cycle using glycoengineered Pichia pastoris to produce monoclonal antibody cocktails against pathogens. To enable rapid genetic engineering of P. pastoris, we introduced a genomic landing pad for reliable recombinase-mediated DNA integration. We then created strains expressing each of the three monoclonal antibodies that comprise the ZMapp cocktail, and demonstrated that the secreted antibodies bind to the Ebola virus glycoprotein by immunofluorescence assay. We anticipate that this approach could accelerate the production of therapeutics against future pathogen outbreaks.
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Affiliation(s)
- Oliver Purcell
- Synthetic
Biology Center, Department of Electrical Engineering and Computer
Science, Department of Biological Engineering, 500 Technology Square, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Patrick Opdensteinen
- Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraβe 6, 52074 Aachen, Germany
| | - William Chen
- Synthetic
Biology Center, Department of Electrical Engineering and Computer
Science, Department of Biological Engineering, 500 Technology Square, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Ky Lowenhaupt
- Synthetic
Biology Center, Department of Electrical Engineering and Computer
Science, Department of Biological Engineering, 500 Technology Square, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Alexander Brown
- Department
of Bioengineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Mario Hermann
- Synthetic
Biology Center, Department of Electrical Engineering and Computer
Science, Department of Biological Engineering, 500 Technology Square, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jicong Cao
- Synthetic
Biology Center, Department of Electrical Engineering and Computer
Science, Department of Biological Engineering, 500 Technology Square, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Niklas Tenhaef
- Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Eric Kallweit
- Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Robin Kastilan
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraβe 6, 52074 Aachen, Germany
| | - Anthony J. Sinskey
- Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Pablo Perez-Pinera
- Department
of Bioengineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Johannes F. Buyel
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Forckenbeckstraβe 6, 52074 Aachen, Germany
- Institute
for Molecular Biotechnology, RWTH Aachen University, Worringerweg
1, 52074 Aachen, Germany
| | - Timothy K. Lu
- Synthetic
Biology Center, Department of Electrical Engineering and Computer
Science, Department of Biological Engineering, 500 Technology Square, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Ebola virus disease: an update on post-exposure prophylaxis. THE LANCET. INFECTIOUS DISEASES 2017; 18:e183-e192. [PMID: 29153266 DOI: 10.1016/s1473-3099(17)30677-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 09/20/2017] [Accepted: 10/03/2017] [Indexed: 12/11/2022]
Abstract
The massive outbreak of Ebola virus disease in west Africa between 2013 and 2016 resulted in intense efforts to evaluate the efficacy of several specific countermeasures developed through years of preclinical work, including the first clinical trials for therapeutics and vaccines. In this Review, we discuss how the experience and data generated from that outbreak have helped to advance the understanding of the use of these countermeasures for post-exposure prophylaxis against Ebola virus infection. In future outbreaks, post-exposure prophylaxis could play an important part in reducing community transmission of Ebola virus by providing more immediate protection than does immunisation as well as providing additional protection for health-care workers who are inadvertently exposed over the course of their work. We propose provisional guidance for use of post-exposure prophylaxis in Ebola virus disease and identify the priorities for future preparedness and further research.
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Affiliation(s)
- Francis A Plummer
- Department of Medical Microbiology (Plummer), University of Manitoba College of Medicine, Winnipeg, Man.; Cognoveritas Consulting (Jones), Winnipeg, Man.
| | - Steven M Jones
- Department of Medical Microbiology (Plummer), University of Manitoba College of Medicine, Winnipeg, Man.; Cognoveritas Consulting (Jones), Winnipeg, Man
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Lai CY, Strange DP, Wong TAS, Lehrer AT, Verma S. Ebola Virus Glycoprotein Induces an Innate Immune Response In vivo via TLR4. Front Microbiol 2017; 8:1571. [PMID: 28861075 PMCID: PMC5562721 DOI: 10.3389/fmicb.2017.01571] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 08/03/2017] [Indexed: 01/16/2023] Open
Abstract
Ebola virus (EBOV), a member of the Filoviridae family, causes the most severe form of viral hemorrhagic fever. Although no FDA licensed vaccine or treatment against Ebola virus disease (EVD) is currently available, Ebola virus glycoprotein (GP) is the major antigen used in all candidate Ebola vaccines. Recent reports of protection as quickly as within 6 days of administration of the rVSV-based vaccine expressing EBOV GP before robust humoral responses were generated suggests that the innate immune responses elicited early after vaccination may contribute to the protection. However, the innate immune responses induced by EBOV GP in the absence of viral vectors or adjuvants have not been fully characterized in vivo. Our recent studies demonstrated that immunization with highly purified recombinant GP in the absence of adjuvants induced a robust IgG response and partial protection against EBOV infection suggesting that GP alone can induce protective immunity. In this study we investigated the early immune response to purified EBOV GP alone in vitro and in vivo. We show that GP was efficiently internalized by antigen presenting cells and subsequently induced production of key inflammatory cytokines. In vivo, immunization of mice with EBOV GP triggered the production of key Th1 and Th2 innate immune cytokines and chemokines, which directly governed the recruitment of CD11b+ macrophages and CD11c+ dendritic cells to the draining lymph nodes (DLNs). Pre-treatment of mice with a TLR4 antagonist inhibited GP-induced cytokine production and recruitment of immune cells to the DLN. EBOV GP also upregulated the expression of costimulatory molecules in bone marrow derived macrophages suggesting its ability to enhance APC stimulatory capacity, which is critical for the induction of effective antigen-specific adaptive immunity. Collectively, these results provide the first in vivo evidence that early innate immune responses to EBOV GP are mediated via the TLR4 pathway and are able to modulate the innate-adaptive interface. These mechanistic insights into the adjuvant-like property of EBOV GP may help to develop a better understanding of how optimal prophylactic efficacy of EBOV vaccines can be achieved as well as further explore the potential post-exposure use of vaccines to prevent filoviral disease.
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Affiliation(s)
- Chih-Yun Lai
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at ManoaHonolulu, HI, United States
| | - Daniel P Strange
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at ManoaHonolulu, HI, United States
| | - Teri Ann S Wong
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at ManoaHonolulu, HI, United States
| | - Axel T Lehrer
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at ManoaHonolulu, HI, United States
| | - Saguna Verma
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at ManoaHonolulu, HI, United States
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Abstract
The filoviruses, Ebola virus (EBOV), and Marburg virus (MARV), are among the most pathogenic viruses known to man and the causative agents of viral hemorrhagic fever outbreaks in Africa with case fatality rates of up to 90%. Nearly 30,000 infections were observed in the latest EBOV epidemic in West Africa; previous outbreaks were much smaller, typically only affecting less than a few hundred people. Compared to other diseases such as AIDS or Malaria with millions of cases annually, filovirus hemorrhagic fever (FHF) is one of the neglected infectious diseases. There are no licensed vaccines or therapeutics available to treat EBOV and MARV infections; therefore, these pathogens can only be handled in maximum containment laboratories and are classified as select agents. Under these limitations, a very few laboratories worldwide conducted basic research and countermeasure development for EBOV and MARV since their respective discoveries in 1967 (MARV) and 1976 (EBOV). In this review, we discuss several vaccine platforms against EBOV and MARV, which have been assessed for their protective efficacy in animal models of FHF. The focus is on the most promising approaches, which were accelerated in clinical development (phase I-III trials) during the EBOV epidemic in West Africa.
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Affiliation(s)
- Pierce Reynolds
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA.
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ElSherif MS, Brown C, MacKinnon-Cameron D, Li L, Racine T, Alimonti J, Rudge TL, Sabourin C, Silvera P, Hooper JW, Kwilas SA, Kilgore N, Badorrek C, Ramsey WJ, Heppner DG, Kemp T, Monath TP, Nowak T, McNeil SA, Langley JM, Halperin SA. Assessing the safety and immunogenicity of recombinant vesicular stomatitis virus Ebola vaccine in healthy adults: a randomized clinical trial. CMAJ 2017. [PMID: 28630358 DOI: 10.1503/cmaj.170074] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND The 2013-2016 Ebola virus outbreak in West Africa was the most widespread in history. In response, alive attenuated recombinant vesicular stomatitis virus (rVSV) vaccine expressing Zaire Ebolavirus glycoprotein (rVSVΔG-ZEBOV-GP) was evaluated in humans. METHODS In a phase 1, randomized, dose-ranging, observer-blind, placebo-controlled trial, healthy adults aged 18-65 years were randomized into 4 groups of 10 to receive one of 3 vaccine doses or placebo. Follow-up visits spanned 180 days postvaccination for safety monitoring, immunogenicity testing and any rVSV virus shedding. RESULTS Forty participants were injected with rVSVΔG-ZEBOV-GP vaccine (n = 30) or saline placebo (n = 10). No serious adverse events related to the vaccine or participant withdrawals were reported. Solicited adverse events during the 14-day follow-up period were mild to moderate and self-limited, with the exception of injection-site pain and headache. Viremia following vaccination was transient and no longer detectable after study day 3, with no virus shedding in saliva or urine. All vaccinated participants developed serum immunoglobulin G (IgG), as measured by Ebola virus envelope glycoprotein-based enzyme-linked immunosorbent assay (ELISA). Immunogenicity was comparable across all dose groups, and sustained IgG titers were detectable through to the last visit, at study day 180. INTERPRETATION In this phase 1 study, there were no safety concerns after a single dose of rVSVΔG-ZEBOV-GP vaccine. IgG ELISA showed persistent high titers at 180 days postimmunization. There was a period of reactogenicity, but in general, the vaccine was well tolerated. This study provides evidence of the safety and immunogenicity of rVSVΔG-ZEBOV-GP vaccine and importance of its further investigation. Trial registration: Clinical-Trials.gov no., NCT02374385.
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Affiliation(s)
- May S ElSherif
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Catherine Brown
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Donna MacKinnon-Cameron
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Li Li
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Trina Racine
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Judie Alimonti
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Thomas L Rudge
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Carol Sabourin
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Peter Silvera
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Jay W Hooper
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Steven A Kwilas
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Nicole Kilgore
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Christopher Badorrek
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - W Jay Ramsey
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - D Gray Heppner
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Tracy Kemp
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Thomas P Monath
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Teresa Nowak
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Shelly A McNeil
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Joanne M Langley
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass
| | - Scott A Halperin
- Canadian Center for Vaccinology (ElSherif, Brown, MacKinnon-Cameron, Li, McNeil, Langley, Halperin), IWK Health Centre and Nova Scotia Health Authority, Dalhousie University, Halifax, NS; National Microbiology Laboratory (Racine, Alimonti), Winnipeg, Man.; Battelle Biomedical Research Center (Rudge, Sabourin), Columbus, Ohio; United States Army Medical Research Institute of Infectious Disease (Silvera, Hooper, Kwilas), Fort Detrick, Md.; Joint Program Executive Office for Chemical and Biological Defense Medical Countermeasure Systems' Joint Vaccine Acquisition Program (Kilgore, Badorrek), Fort Detrick, Md.; BioProtection Systems/NewLink Genetics Corporation (Ramsey, Heppner, Kemp, Monath), Ames, Iowa; Veristat LLC (Nowak), Southborough, Mass.
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48
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Dowall SD, Jacquot F, Landon J, Rayner E, Hall G, Carbonnelle C, Raoul H, Pannetier D, Cameron I, Coxon R, Al Abdulla I, Hewson R, Carroll MW. Post-exposure treatment of non-human primates lethally infected with Ebola virus with EBOTAb, a purified ovine IgG product. Sci Rep 2017. [PMID: 28642489 PMCID: PMC5481440 DOI: 10.1038/s41598-017-03910-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Despite sporadic outbreaks of Ebola virus (EBOV) over the last 4 decades and the recent public health emergency in West Africa, there are still no approved vaccines or therapeutics for the treatment of acute EBOV disease (EVD). In response to the 2014 outbreak, an ovine immunoglobulin therapy was developed, termed EBOTAb. After promising results in the guinea pig model of EBOV infection, EBOTAb was tested in the cynomolgus macaque non-human primate model of lethal EBOV infection. To ensure stringent therapeutic testing conditions to replicate likely clinical usage, EBOTAb was first delivered 1, 2 or 3 days post-challenge with a lethal dose of EBOV. Results showed a protective effect of EBOTAb given post-exposurally, with survival rates decreasing with increasing time after challenge. Viremia results demonstrated that EBOTAb resulted in a decreased circulation of EBOV in the bloodstream. Additionally, assay of liver enzymes and histology analysis of local tissues identified differences between EBOTAb-treated and untreated groups. The results presented demonstrate that EBOTAb conferred protection against EBOV when given post-exposure and should be explored and developed further as a potential intervention strategy for future outbreaks, which are likely to occur.
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Affiliation(s)
- Stuart D Dowall
- National Infection Service, Public Health England, Porton Down, Salisbury, Wiltshire, SP4 0JG, UK
| | - Frédéric Jacquot
- Laboratoire P4, INSERM Jean Merieux, 21 Avenue Tony Garnier, Lyon, France
| | - John Landon
- MicroPharm Ltd, Station Road, Newcastle Emlyn, Dyfed, SA38 9BY, UK
| | - Emma Rayner
- National Infection Service, Public Health England, Porton Down, Salisbury, Wiltshire, SP4 0JG, UK
| | - Graham Hall
- National Infection Service, Public Health England, Porton Down, Salisbury, Wiltshire, SP4 0JG, UK
| | | | - Hervé Raoul
- Laboratoire P4, INSERM Jean Merieux, 21 Avenue Tony Garnier, Lyon, France
| | - Delphine Pannetier
- Laboratoire P4, INSERM Jean Merieux, 21 Avenue Tony Garnier, Lyon, France
| | - Ian Cameron
- MicroPharm Ltd, Station Road, Newcastle Emlyn, Dyfed, SA38 9BY, UK
| | - Ruth Coxon
- MicroPharm Ltd, Station Road, Newcastle Emlyn, Dyfed, SA38 9BY, UK
| | | | - Roger Hewson
- National Infection Service, Public Health England, Porton Down, Salisbury, Wiltshire, SP4 0JG, UK
| | - Miles W Carroll
- National Infection Service, Public Health England, Porton Down, Salisbury, Wiltshire, SP4 0JG, UK.
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49
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Coller BAG, Blue J, Das R, Dubey S, Finelli L, Gupta S, Helmond F, Grant-Klein RJ, Liu K, Simon J, Troth S, VanRheenen S, Waterbury J, Wivel A, Wolf J, Heppner DG, Kemp T, Nichols R, Monath TP. Clinical development of a recombinant Ebola vaccine in the midst of an unprecedented epidemic. Vaccine 2017. [PMID: 28647166 DOI: 10.1016/j.vaccine.2017.05.097] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The 2014-2016 Ebola outbreak caused over 28,000 cases and 11,000 deaths. Merck & Co. Inc., Kenilworth, NJ USA and NewLink Genetics are working with private and public partners to develop and license an Ebola vaccine that was evaluated extensively during the outbreak. The vaccine referred to as V920 is a recombinant vesicular stomatitis virus (rVSV) in which the VSV-G envelope glycoprotein (GP) is completely replaced by the Zaire ebolavirus GP (rVSVΔG-ZEBOV-GP). Eight Phase I and four Phase II/III clinical trials enrolling approximately 17,000 subjects were conducted in parallel to the outbreak to assess the safety, immunogenicity, and/or efficacy of V920. Immunogenicity data demonstrate that anti-GP antibodies are generally detectable by ELISA by 14days postvaccination with up to 100% seroconversion observed by 28days post dose. In addition, the results of a ring vaccination trial conducted by the WHO and their partners in Guinea suggest robust vaccine efficacy within 10days of receipt of a single dose of vaccine. The vaccine is generally well-tolerated when administered to healthy, non-pregnant adults. The development of this vaccine candidate in the context of this unprecedented epidemic has involved the close cooperation of large number of international partners and highlights what we as a public health community can accomplish when working together towards a common goal. Study identification: V920-001 to V920-012. CLINICALTRIALS.GOV identifiers: NCT02269423; NCT02280408; NCT02374385; NCT02314923; NCT02287480; NCT02283099; NCT02296983; NCT02344407; NCT02378753; NCT02503202.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - D Gray Heppner
- NewLink Genetics, Inc./BioProtection Systems, Ames, IA, USA
| | - Tracy Kemp
- NewLink Genetics, Inc./BioProtection Systems, Ames, IA, USA
| | - Rick Nichols
- NewLink Genetics, Inc./BioProtection Systems, Ames, IA, USA
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50
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Menicucci AR, Sureshchandra S, Marzi A, Feldmann H, Messaoudi I. Transcriptomic analysis reveals a previously unknown role for CD8 + T-cells in rVSV-EBOV mediated protection. Sci Rep 2017; 7:919. [PMID: 28428619 PMCID: PMC5430516 DOI: 10.1038/s41598-017-01032-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/23/2017] [Indexed: 11/09/2022] Open
Abstract
Ebola virus (EBOV) poses a significant threat to human health as highlighted by the recent epidemic in West Africa. Data from animal studies and a ring vaccination clinical trial conducted in Guinea during the recent epidemic demonstrated that a recombinant VSV where G protein is replaced with EBOV GP (rVSV-EBOV) is safe and highly efficacious. We previously established that antibodies are essential for rVSV-EBOV mediated protection against EBOV; however, the mechanisms by which this vaccine induces a humoral response and the role of T-cells in rVSV-EBOV mediated protection remain poorly understood. Since this is the only vaccine platform that has completed Phase III clinical studies, it is imperative to gain a better understanding of its mechanisms of protection. Therefore, we performed a longitudinal gene expression analysis of samples collected from controls and T-cell-depleted macaques after rVSV-EBOV vaccination and EBOV challenge. We show that rVSV-EBOV vaccination induces gene expression changes consistent with anti-viral immunity and B-cell proliferation. We also report a previously unappreciated role for CD8+ T-cells in mediating rVSV-EBOV protection. Finally, limited viral transcription in surviving animals may boost protective responses after EBOV challenge by maintaining transcriptional changes. This study presents a novel approach in determining mechanisms of vaccine efficacy.
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Affiliation(s)
- Andrea R Menicucci
- Division of Biomedical Sciences, School of Medicine, University of California-Riverside, Riverside, CA, 92521, USA
| | - Suhas Sureshchandra
- Graduate Program in Genetics, Genomics and Bioinformatics, University of California-Riverside, Riverside, CA, 92521, USA
| | - Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, 59840, USA
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, 59840, USA
| | - Ilhem Messaoudi
- Department of Molecular Biology and Biochemistry, University of California-Irvine, Irvine, CA, 92697, USA.
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