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Bagdonaite I, Abdurahman S, Mirandola M, Pasqual D, Frank M, Narimatsu Y, Joshi HJ, Vakhrushev SY, Salata C, Mirazimi A, Wandall HH. Targeting host O-linked glycan biosynthesis affects Ebola virus replication efficiency and reveals differential GalNAc-T acceptor site preferences on the Ebola virus glycoprotein. J Virol 2024; 98:e0052424. [PMID: 38757972 DOI: 10.1128/jvi.00524-24] [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: 03/21/2024] [Accepted: 04/18/2024] [Indexed: 05/18/2024] Open
Abstract
Ebola virus glycoprotein (EBOV GP) is one of the most heavily O-glycosylated viral glycoproteins, yet we still lack a fundamental understanding of the structure of its large O-glycosylated mucin-like domain and to what degree the host O-glycosylation capacity influences EBOV replication. Using tandem mass spectrometry, we identified 47 O-glycosites on EBOV GP and found similar glycosylation signatures on virus-like particle- and cell lysate-derived GP. Furthermore, we performed quantitative differential O-glycoproteomics on proteins produced in wild-type HEK293 cells and cell lines ablated for the three key initiators of O-linked glycosylation, GalNAc-T1, -T2, and -T3. The data show that 12 out of the 47 O-glycosylated sites were regulated, predominantly by GalNAc-T1. Using the glycoengineered cell lines for authentic EBOV propagation, we demonstrate the importance of O-linked glycan initiation and elongation for the production of viral particles and the titers of progeny virus. The mapped O-glycan positions and structures allowed to generate molecular dynamics simulations probing the largely unknown spatial arrangements of the mucin-like domain. The data highlight targeting GALNT1 or C1GALT1C1 as a possible way to modulate O-glycan density on EBOV GP for novel vaccine designs and tailored intervention approaches.IMPORTANCEEbola virus glycoprotein acquires its extensive glycan shield in the host cell, where it is decorated with N-linked glycans and mucin-type O-linked glycans. The latter is initiated by a family of polypeptide GalNAc-transferases that have different preferences for optimal peptide substrates resulting in a spectrum of both very selective and redundant substrates for each isoform. In this work, we map the exact locations of O-glycans on Ebola virus glycoprotein and identify subsets of sites preferentially initiated by one of the three key isoforms of GalNAc-Ts, demonstrating that each enzyme contributes to the glycan shield integrity. We further show that altering host O-glycosylation capacity has detrimental effects on Ebola virus replication, with both isoform-specific initiation and elongation playing a role. The combined structural and functional data highlight glycoengineered cell lines as useful tools for investigating molecular mechanisms imposed by specific glycans and for steering the immune responses in future vaccine designs.
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Affiliation(s)
- Ieva Bagdonaite
- Department of Cellular and Molecular Medicine, Copenhagen Center for Glycomics, University of Copenhagen, Copenhagen, Denmark
| | | | - Mattia Mirandola
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Denis Pasqual
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | | | - Yoshiki Narimatsu
- Department of Cellular and Molecular Medicine, Copenhagen Center for Glycomics, University of Copenhagen, Copenhagen, Denmark
| | - Hiren J Joshi
- Department of Cellular and Molecular Medicine, Copenhagen Center for Glycomics, University of Copenhagen, Copenhagen, Denmark
| | - Sergey Y Vakhrushev
- Department of Cellular and Molecular Medicine, Copenhagen Center for Glycomics, University of Copenhagen, Copenhagen, Denmark
| | - Cristiano Salata
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Ali Mirazimi
- Public Health Agency of Sweden, Solna, Sweden
- Department of Laboratory Medicine (LABMED), Karolinska Institute, Stockholm, Sweden
- National Veterinary Institute, Uppsala, Sweden
| | - Hans H Wandall
- Department of Cellular and Molecular Medicine, Copenhagen Center for Glycomics, University of Copenhagen, Copenhagen, Denmark
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Qi H, Xue JB, Lai DY, Li A, Tao SC. Current advances in antibody-based serum biomarker studies: From protein microarray to phage display. Proteomics Clin Appl 2022; 16:e2100098. [PMID: 36071670 DOI: 10.1002/prca.202100098] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 08/16/2022] [Accepted: 09/05/2022] [Indexed: 12/30/2022]
Abstract
PURPOSE This review aims to summarize the technological advances in the field of antibody-based biomarker studies by proteome microarray and phage display. In addition, the possible development directions of this field are also discussed. EXPERIMENTAL DESIGN We have focused on the antibody profiling by proteome microarray and phage display, including the technological advances, the tools/resources constructed, and the characteristics of both platforms. RESULTS With the help of tools/resources and technological advances in proteome microarray and phage display, the efficiency of profiling antibody-based biomarkers in serum samples has been greatly improved. CONCLUSIONS In the past few years, proteome microarray and phage display, especially the latter one, have already demonstrated their capacity and efficiency for biomarker identification. In the near future, we believe that more antibody-based biomarkers could be identified, and some of them could eventually be developed into real clinical applications.
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Affiliation(s)
- Huan Qi
- Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Jun-Biao Xue
- Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Dan-Yun Lai
- Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Ang Li
- College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Sheng-Ce Tao
- Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
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Vengesai A, Kasambala M, Mutandadzi H, Mduluza-Jokonya TL, Mduluza T, Naicker T. Scoping review of the applications of peptide microarrays on the fight against human infections. PLoS One 2022; 17:e0248666. [PMID: 35077448 PMCID: PMC8789108 DOI: 10.1371/journal.pone.0248666] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 01/11/2022] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION This scoping review explores the use of peptide microarrays in the fight against infectious diseases. The research domains explored included the use of peptide microarrays in the mapping of linear B-cell and T cell epitopes, antimicrobial peptide discovery, immunosignature characterisation and disease immunodiagnostics. This review also provides a short overview of peptide microarray synthesis. METHODS Electronic databases were systematically searched to identify relevant studies. The review was conducted using the Joanna Briggs Institute methodology for scoping reviews and data charting was performed using a predefined form. The results were reported by narrative synthesis in line with the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews guidelines. RESULTS Ninety-five articles from 103 studies were included in the final data charting process. The majority (92. 0%) of the articles were published during 2010-2020 and were mostly from Europe (44.2%) and North America (34.7%). The findings were from the investigation of viral (45.6%), bacterial (32. 0%), parasitic (23.3%) and fungal (2. 0%) infections. Out of the serological studies, IgG was the most reported antibody type followed by IgM. The largest portion of the studies (77.7%) were related to mapping B-cell linear epitopes, 5.8% were on diagnostics, 5.8% reported on immunosignature characterisation and 8.7% reported on viral and bacterial cell binding assays. Two studies reported on T-cell epitope profiling. CONCLUSION The most important application of peptide microarrays was found to be B-cell epitope mapping or antibody profiling to identify diagnostic and vaccine targets. Immunosignatures identified by random peptide microarrays were found to be applied in the diagnosis of infections and interrogation of vaccine responses. The analysis of the interactions of random peptide microarrays with bacterial and viral cells using binding assays enabled the identification of antimicrobial peptides. Peptide microarray arrays were also used for T-cell linear epitope mapping which may provide more information for the design of peptide-based vaccines and for the development of diagnostic reagents.
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Affiliation(s)
- Arthur Vengesai
- Optics & Imaging, Doris Duke Medical Research Institute, College of Health Sciences, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
- Department of Biochemistry, Faculty of Medicine, Midlands State University, Gweru, Zimbabwe
| | - Maritha Kasambala
- Department of Biology, Faculty of Science and Agriculture, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
| | - Hamlet Mutandadzi
- Faculty of Medicine and Health Sciences, Parirenyatwa Hospital, University of Zimbabwe, Harare, Zimbabwe
| | - Tariro L. Mduluza-Jokonya
- Optics & Imaging, Doris Duke Medical Research Institute, College of Health Sciences, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
| | - Takafira Mduluza
- Department of Biochemistry, Faculty of Medicine, Midlands State University, Gweru, Zimbabwe
| | - Thajasvarie Naicker
- Optics & Imaging, Doris Duke Medical Research Institute, College of Health Sciences, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
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4
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Bhatia B, Meade-White K, Haddock E, Feldmann F, Marzi A, Feldmann H. A live-attenuated viral vector vaccine protects mice against lethal challenge with Kyasanur Forest disease virus. NPJ Vaccines 2021; 6:152. [PMID: 34907224 PMCID: PMC8671490 DOI: 10.1038/s41541-021-00416-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/18/2021] [Indexed: 12/02/2022] Open
Abstract
Kyasanur Forest disease virus (KFDV) is a tick-borne flavivirus endemic in India known to cause severe hemorrhagic and encephalitic disease in humans. In recent years, KFDV has spread beyond its original endemic zone raising public health concerns. Currently, there is no treatment available for KFDV but a vaccine with limited efficacy is used in India. Here, we generated two new KFDV vaccine candidates based on the vesicular stomatitis virus (VSV) platform. We chose the VSV-Ebola virus (VSV-EBOV) vector either with the full-length or a truncated EBOV glycoprotein as the vehicle to express the precursor membrane (prM) and envelope (E) proteins of KFDV (VSV-KFDV). For efficacy testing, we established a mouse disease model by comparing KFDV infections in three immunocompetent mouse strains (BALB/c, C57Bl/6, and CD1). Both vaccine vectors provided promising protection against lethal KFDV challenge in the BALB/c model following prime-only prime-boost and immunizations. Only prime-boost immunization with VSV-KFDV expressing full-length EBOV GP resulted in uniform protection. Hyperimmune serum derived from prime-boost immunized mice protected naïve BALB/c mice from lethal KFDV challenge indicating the importance of antibodies for protection. The new VSV-KFDV vectors are promising vaccine candidates to combat an emerging, neglected public health problem in a densely populated part of the world.
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Affiliation(s)
- Bharti Bhatia
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Kimberly Meade-White
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Elaine Haddock
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Friederike Feldmann
- Rocky Mountain Veterinary Branch, 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
| | - Heinz Feldmann
- 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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Meyer M, Gunn BM, Malherbe DC, Gangavarapu K, Yoshida A, Pietzsch C, Kuzmina NA, Saphire EO, Collins PL, Crowe JE, Zhu JJ, Suchard MA, Brining DL, Mire CE, Cross RW, Geisbert JB, Samal SK, Andersen KG, Alter G, Geisbert TW, Bukreyev A. Ebola vaccine-induced protection in nonhuman primates correlates with antibody specificity and Fc-mediated effects. Sci Transl Med 2021; 13:13/602/eabg6128. [PMID: 34261800 DOI: 10.1126/scitranslmed.abg6128] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 06/04/2021] [Indexed: 12/15/2022]
Abstract
Although substantial progress has been made with Ebola virus (EBOV) vaccine measures, the immune correlates of vaccine-mediated protection remain uncertain. Here, five mucosal vaccine vectors based on human and avian paramyxoviruses provided nonhuman primates with varying degrees of protection, despite expressing the same EBOV glycoprotein (GP) immunogen. Each vaccine produced antibody responses that differed in Fc-mediated functions and isotype composition, as well as in magnitude and coverage toward GP and its conformational and linear epitopes. Differences in the degree of protection and comprehensive characterization of the response afforded the opportunity to identify which features and functions were elevated in survivors and could therefore serve as vaccine correlates of protection. Pairwise network correlation analysis of 139 immune- and vaccine-related parameters was performed to demonstrate relationships with survival. Total GP-specific antibodies, as measured by biolayer interferometry, but not neutralizing IgG or IgA titers, correlated with survival. Fc-mediated functions and the amount of receptor binding domain antibodies were associated with improved survival outcomes, alluding to the protective mechanisms of these vaccines. Therefore, functional qualities of the antibody response, particularly Fc-mediated effects and GP specificity, rather than simply magnitude of the response, appear central to vaccine-induced protection against EBOV. The heterogeneity of the response profile between the vaccines indicates that each vaccine likely exhibits its own protective signature and the requirements for an efficacious EBOV vaccine are complex.
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Affiliation(s)
- Michelle Meyer
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA.,Galveston National Laboratory, Galveston, TX 77555, USA
| | - Bronwyn M Gunn
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA
| | - Delphine C Malherbe
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA.,Galveston National Laboratory, Galveston, TX 77555, USA
| | - Karthik Gangavarapu
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA.,Scripps Research Translational Institute, La Jolla, CA 92037, USA
| | - Asuka Yoshida
- Virginia-Maryland Regional College of Veterinary Medicine, University of Maryland, MD 20742, USA
| | - Colette Pietzsch
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA.,Galveston National Laboratory, Galveston, TX 77555, USA
| | - Natalia A Kuzmina
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA.,Galveston National Laboratory, Galveston, TX 77555, USA
| | | | - Peter L Collins
- RNA Virology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20814, USA
| | - James E Crowe
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Vanderbilt Vaccine Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - James J Zhu
- USDA-ARS, FADRU, Plum Island Animal Disease Center, Orient, NY 11957, USA
| | - Marc A Suchard
- Departments of Biomathematics, Biostatistics and Human Genetics, University of California, Los Angeles, CA 90095, USA
| | - Douglas L Brining
- Animal Resource Center, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Chad E Mire
- Galveston National Laboratory, Galveston, TX 77555, USA.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Robert W Cross
- Galveston National Laboratory, Galveston, TX 77555, USA.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Joan B Geisbert
- Galveston National Laboratory, Galveston, TX 77555, USA.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Siba K Samal
- Virginia-Maryland Regional College of Veterinary Medicine, University of Maryland, MD 20742, USA
| | - Kristian G Andersen
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA.,Scripps Research Translational Institute, La Jolla, CA 92037, USA
| | - Galit Alter
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139, USA
| | - Thomas W Geisbert
- Galveston National Laboratory, Galveston, TX 77555, USA.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Alexander Bukreyev
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA. .,Galveston National Laboratory, Galveston, TX 77555, USA.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
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6
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Lu P, Guerin DJ, Lin S, Chaudhury S, Ackerman ME, Bolton DL, Wallqvist A. Immunoprofiling Correlates of Protection Against SHIV Infection in Adjuvanted HIV-1 Pox-Protein Vaccinated Rhesus Macaques. Front Immunol 2021; 12:625030. [PMID: 34046030 PMCID: PMC8144500 DOI: 10.3389/fimmu.2021.625030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 04/27/2021] [Indexed: 11/13/2022] Open
Abstract
Human immunodeficiency virus type 1 (HIV-1) infection remains a major public health threat due to its incurable nature and the lack of a highly efficacious vaccine. The RV144 vaccine trial is the only clinical study to date that demonstrated significant but modest decrease in HIV infection risk. To improve HIV-1 vaccine immunogenicity and efficacy, we recently evaluated pox-protein vaccination using a next generation liposome-based adjuvant, Army Liposomal Formulation adsorbed to aluminum (ALFA), in rhesus monkeys and observed 90% efficacy against limiting dose mucosal SHIV challenge in male animals. Here, we analyzed binding antibody responses, as assessed by Fc array profiling using a broad range of HIV-1 envelope antigens and Fc features, to explore the mechanisms of ALFA-mediated protection by employing machine learning and Cox proportional hazards regression analyses. We found that Fcγ receptor 2a-related binding antibody responses were augmented by ALFA relative to aluminium hydroxide, and these responses were associated with reduced risk of infection in male animals. Our results highlight the application of systems serology to provide mechanistic insights to vaccine-elicited protection and support evidence that antibody effector responses protect against HIV-1 infection.
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Affiliation(s)
- Pinyi Lu
- Biotechnology HPC Software Applications Institute, Telemedicine and Advanced Technology Research Center, U.S. Army Medical Research and Development Command, Fort Detrick, MD, United States.,Henry M. Jackson Foundation for the Advancement of Military Medicine, Rockville, MD, United States
| | - Dylan J Guerin
- Thayer School of Engineering, Dartmouth College, Hanover, NH, United States
| | - Shu Lin
- Thayer School of Engineering, Dartmouth College, Hanover, NH, United States
| | - Sidhartha Chaudhury
- Center for Enabling Capabilities, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | | | - Diane L Bolton
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Rockville, MD, United States.,U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | - Anders Wallqvist
- Biotechnology HPC Software Applications Institute, Telemedicine and Advanced Technology Research Center, U.S. Army Medical Research and Development Command, Fort Detrick, MD, United States
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Systems serology for decoding infection and vaccine-induced antibody responses to HIV-1. Curr Opin HIV AIDS 2020; 14:253-264. [PMID: 31033729 DOI: 10.1097/coh.0000000000000558] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW Experimental and analytical advances have enabled systematic, high-resolution studies of humoral immune responses, and are beginning to define mechanisms of immunity to HIV. RECENT FINDINGS High-throughput, information-rich experimental and analytical methods, whether genomic, proteomic, or transcriptomic, have firmly established their value across a diversity of fields. Consideration of these tools as trawlers in 'fishing expeditions' has faded as 'data-driven discovery' has come to be valued as an irreplaceable means to develop fundamental understanding of biological systems. Collectively, studies of HIV-1 infection and vaccination including functional, biophysical, and biochemical humoral profiling approaches have provided insights into the phenotypic characteristics of individual and pools of antibodies. Relating these measures to clinical status, protection/efficacy outcomes, and cellular profiling data using machine learning has offered the possibility of identifying unanticipated mechanisms of action and gaining insights into fundamental immunological processes that might otherwise be difficult to decipher. SUMMARY Recent evidence establishes that systematic data collection and application of machine learning approaches can identify humoral immune correlates that are generalizable across distinct HIV-1 immunogens and vaccine regimens and translatable between model organisms and the clinic. These outcomes provide a strong rationale supporting the utility and further expansion of these approaches both in support of vaccine development and more broadly in defining mechanisms of immunity.
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Boum Y, Juan-Giner A, Hitchings M, Soumah A, Strecker T, Sadjo M, Cuthbertson H, Hayes P, Tchaton M, Jemmy JP, Clarck C, King D, Faga EM, Becker S, Halis B, Gunnstein N, Carroll M, Røttingen JA, Kondé MK, Doumbia M, Henao-Restrepo AM, Kieny MP, Cisse M, Draguez B, Grais RF. Humoral and cellular immune response induced by rVSVΔG-ZEBOV-GP vaccine among frontline workers during the 2013-2016 West Africa Ebola outbreak in Guinea. Vaccine 2020; 38:4877-4884. [PMID: 32499066 PMCID: PMC7306162 DOI: 10.1016/j.vaccine.2020.04.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 04/26/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND As part of a Phase III trial with the Ebola vaccine rVSVΔG-ZEBOV-GP in Guinea, we invited frontline workers (FLWs) to participate in a sub-study to provide additional information on the immunogenicity of the vaccine. METHODS We conducted an open-label, non-randomized, single-arm immunogenicity evaluation of one dose of rVSVΔG-ZEBOV-GP among healthy FLWs in Guinea. FLWs who refused vaccination were offered to participate as a control group. We followed participants for 84 days with a subset followed-up for 180 days. The primary endpoint was immune response, as measured by ELISA for ZEBOV-glycoprotein-specific antibodies (ELISA-GP) at 28 days. We also conducted neutralization, whole virion ELISA and enzyme-linked immunospot (ELISPOT) assay for cellular response. RESULTS A total of 1172 participants received one dose of vaccine and were followed-up for 84 days, among them 114 participants were followed-up for 180 days. Additionally, 99 participants were included in the control group and followed up for 180 days. Overall, 86.4% (95% CI 84.1-88.4) of vaccinated participants seroresponded at 28 days post-vaccination (ELISA- GP) with 65% of these seroresponding at 14 days post-vaccination. Among those who seroresponded at 28 days, 90.7% (95% CI 82.0-95.4) were still seropositive at 180 days. The proportion of seropositivity in the unvaccinated group was 0.0% (95% CI 0.0-3.8) at 28 days and 5.4% (95% CI 2.1-13.1) at 180 days post-vaccination. We found weak correlation between ELISA-GP and neutralization at baseline but significant pairwise correlation at 28 days post-vaccination. Among samples analysed for cellular response, only 1 (2.2%) exhibited responses towards the Zaire Ebola glycoprotein (Ebola GP ≥ 10) at baseline, 10 (13.5%) at day 28 post-vaccination and 27 (48.2%) at Day 180. CONCLUSIONS We found one dose of rVSVΔG-ZEBOV-GP to be highly immunogenic at 28- and 180-days post vaccination among frontline workers in Guinea. We also found a cellular response that increased with time.
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Affiliation(s)
| | | | - Matt Hitchings
- Center for Communicable Disease Dynamics and Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | | | - Thomas Strecker
- Institute of Virology, Philipps University, Marburg, Germany
| | - Mariama Sadjo
- Centre Hospital-Universitaire de Donka, Conakry, Guinea
| | | | - Peter Hayes
- Division of Medicine, Department of Infectious Diseases, Imperial College London, UK
| | | | - Jean-Paul Jemmy
- Médecins Sans Frontières-Operational Center Belgium, Brussels, Belgium
| | - Carolyn Clarck
- Division of Infectious Disease Control, Norwegian Institute of Public Health, Oslo, Norway
| | - Deborah King
- Division of Medicine, Department of Infectious Diseases, Imperial College London, UK
| | | | - Stephan Becker
- Institute of Virology, Philipps University, Marburg, Germany
| | - Bassam Halis
- Public Health England, National Infection Service, Porton Down, UK
| | - Norheim Gunnstein
- Division of Infectious Disease Control, Norwegian Institute of Public Health, Oslo, Norway
| | - Miles Carroll
- Public Health England, National Infection Service, Porton Down, UK
| | - John-Arne Røttingen
- Division of Infectious Disease Control, Norwegian Institute of Public Health, Oslo, Norway; Department of Health and Society, University of Oslo, Norway; Department of Global Health and Population, Harvard TH Chan School of Public Health, Boston, MA, USA; Coalition for Epidemic Preparedness Innovations, Care of Norwegian Institute of Public Health, Oslo, Norway; Research Council of Norway, Oslo, Norway
| | - Mandy Kader Kondé
- Center of Excellence for Training, Research On Malaria & Priority Diseases In Guinea, Conakry, Guinea
| | | | | | | | - Mohamed Cisse
- Centre Hospital-Universitaire de Donka, Conakry, Guinea
| | - Bertrand Draguez
- Médecins Sans Frontières-Operational Center Belgium, Brussels, Belgium
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First Evidence of Antibodies Against Lloviu Virus in Schreiber's Bent-Winged Insectivorous Bats Demonstrate a Wide Circulation of the Virus in Spain. Viruses 2019; 11:v11040360. [PMID: 31010201 PMCID: PMC6521100 DOI: 10.3390/v11040360] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 11/16/2022] Open
Abstract
Although Lloviu virus (LLOV) was discovered in the carcasses of insectivorous Schreiber’s Bent-winged bats in the caves of Northern Spain in 2002, its infectivity and pathogenicity remain unclear. We examined the seroprevalence of LLOV in potentially exposed Schreiber’s Bent-winged bats (n = 60), common serotine bats (n = 10) as controls, and humans (n = 22) using an immunoblot assay. We found antibodies against LLOV GP2 in all of Schreiber’s Bent-winged bats serum pools, but not in any of the common serotine bats and human pools tested. To confirm this seroreactivity, 52 serums were individually tested using Domain Programmable Arrays (DPA), a phage display based-system serology technique for profiling filovirus epitopes. A serological signature against different LLOV proteins was obtained in 19/52 samples tested (36.5%). The immunodominant response was in the majority specific to LLOV-unique epitopes, confirming that the serological response detected was to LLOV. To our knowledge, this is the first serological evidence of LLOV exposure in live captured Schreiber’s Bent-winged bats, dissociating LLOV circulation as the cause of the previously reported die-offs.
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