1
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Wallace R, Bliss CM, Parker AL. The Immune System-A Double-Edged Sword for Adenovirus-Based Therapies. Viruses 2024; 16:973. [PMID: 38932265 PMCID: PMC11209478 DOI: 10.3390/v16060973] [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: 05/25/2024] [Revised: 06/12/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
Pathogenic adenovirus (Ad) infections are widespread but typically mild and transient, except in the immunocompromised. As vectors for gene therapy, vaccine, and oncology applications, Ad-based platforms offer advantages, including ease of genetic manipulation, scale of production, and well-established safety profiles, making them attractive tools for therapeutic development. However, the immune system often poses a significant challenge that must be overcome for adenovirus-based therapies to be truly efficacious. Both pre-existing anti-Ad immunity in the population as well as the rapid development of an immune response against engineered adenoviral vectors can have detrimental effects on the downstream impact of an adenovirus-based therapeutic. This review focuses on the different challenges posed, including pre-existing natural immunity and anti-vector immunity induced by a therapeutic, in the context of innate and adaptive immune responses. We summarise different approaches developed with the aim of tackling these problems, as well as their outcomes and potential future applications.
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Affiliation(s)
- Rebecca Wallace
- Division of Cancer and Genetics, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK; (R.W.); (C.M.B.)
| | - Carly M. Bliss
- Division of Cancer and Genetics, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK; (R.W.); (C.M.B.)
- Systems Immunity University Research Institute, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK
| | - Alan L. Parker
- Division of Cancer and Genetics, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK; (R.W.); (C.M.B.)
- Systems Immunity University Research Institute, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK
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2
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Davis C, Singh D, Anderson K, Vardeu A, Kopycinski J, Bridges-Webb A, Trickett A, O’Brien S, Downs M, Kaur R, Kolenovska R, Bussey L, Rutkowski K, Sebastian S, Cargill T, Barnes E, Evans TG, Cicconi P. Effect of Prior ChAdOx1 COVID-19 Immunisation on T-Cell Responses to ChAdOx1-HBV. Vaccines (Basel) 2024; 12:644. [PMID: 38932373 PMCID: PMC11209196 DOI: 10.3390/vaccines12060644] [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: 04/15/2024] [Revised: 05/24/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
There are varying data concerning the effect of prior anti-vector immunity on the T-cell response induced by immunisation with an identical vectored vaccine containing a heterologous antigen insert. To determine whether prior exposure to ChAdOx1-SARS-CoV2 immunisation (Vaxzevria®) impacts magnitudes of antigen-specific T-cell responses elicited by subsequent administration of the same viral vector (encoding HBV antigens, ChAdOx1-HBV), healthy volunteers that had received Vaxzevria® (n = 15) or the Pfizer or Moderna mRNA COVID-19 vaccine (n = 11) between 10 and 18 weeks prior were recruited to receive a single intramuscular injection of ChAdOx1-HBV. Anti-ChAdOx1-neutralising antibody titers were determined, and vector or insert-specific T-cell responses were measured by a gamma-interferon ELISpot and intracellular cytokine staining (ICS) assay using multiparameter flow cytometry. Participants were followed for three months after the ChAdOx1-HBV injection, which was well-tolerated, and no dropouts occurred. The baseline ChAdOx1 neutralisation titers were higher in the Vaxzevria® cohort (median of 848) than in the mRNA cohort (median of 25). T-cell responses to HBV antigens, measured by ELISpot, were higher on day 28 in the mRNA group (p = 0.013) but were similar between groups on day 84 (p = 0.441). By ICS, these differences persisted at the last time point. There was no clear correlation between the baseline responses to the adenoviral hexon and the subsequent ELISpot responses. As vaccination within 3 months using the same viral vector backbone affected the insert-specific T-cell responses, a greater interval after prior adenoviral immunisation using heterologous antigens may be warranted in settings in which these cells play critical roles.
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Affiliation(s)
- Charlotte Davis
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Dave Singh
- Medicines Evaluation Unit Ltd., Manchester M23 9QZ, UK;
| | - Katie Anderson
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Antonella Vardeu
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Jakub Kopycinski
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | | | - Alice Trickett
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Susanne O’Brien
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Matthew Downs
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Randip Kaur
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Radka Kolenovska
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Louise Bussey
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Kathryn Rutkowski
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Sarah Sebastian
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Tamsin Cargill
- Nuffield Department of Medicine, University of Oxford, Oxford OX1 2JD, UK (E.B.)
| | - Eleanor Barnes
- Nuffield Department of Medicine, University of Oxford, Oxford OX1 2JD, UK (E.B.)
| | - Thomas G. Evans
- Barinthus Biotherapeutics, Harwell, Didcot OX11 0DF, UK (A.V.); (M.D.)
| | - Paola Cicconi
- Centre for Clinical Vaccinology and Tropical Medicine (CCVTM), University of Oxford, Oxford OX1 2JD, UK;
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3
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Kaur A, Vaccari M. Exploring HIV Vaccine Progress in the Pre-Clinical and Clinical Setting: From History to Future Prospects. Viruses 2024; 16:368. [PMID: 38543734 PMCID: PMC10974975 DOI: 10.3390/v16030368] [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: 01/09/2024] [Revised: 02/08/2024] [Accepted: 02/21/2024] [Indexed: 04/01/2024] Open
Abstract
The human immunodeficiency virus (HIV) continues to pose a significant global health challenge, with millions of people affected and new cases emerging each year. While various treatment and prevention methods exist, including antiretroviral therapy and non-vaccine approaches, developing an effective vaccine remains the most crucial and cost-effective solution to combating the HIV epidemic. Despite significant advancements in HIV research, the HIV vaccine field has faced numerous challenges, and only one clinical trial has demonstrated a modest level of efficacy. This review delves into the history of HIV vaccines and the current efforts in HIV prevention, emphasizing pre-clinical vaccine development using the non-human primate model (NHP) of HIV infection. NHP models offer valuable insights into potential preventive strategies for combating HIV, and they play a vital role in informing and guiding the development of novel vaccine candidates before they can proceed to human clinical trials.
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Affiliation(s)
- Amitinder Kaur
- Division of Immunology, Tulane National Primate Research Center, Covington, LA 70433, USA;
- School of Medicine, Tulane University, New Orleans, LA 70112, USA
| | - Monica Vaccari
- Division of Immunology, Tulane National Primate Research Center, Covington, LA 70433, USA;
- School of Medicine, Tulane University, New Orleans, LA 70112, USA
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4
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Song Y, Mehl F, Zeichner SL. Vaccine Strategies to Elicit Mucosal Immunity. Vaccines (Basel) 2024; 12:191. [PMID: 38400174 PMCID: PMC10892965 DOI: 10.3390/vaccines12020191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/29/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
Vaccines are essential tools to prevent infection and control transmission of infectious diseases that threaten public health. Most infectious agents enter their hosts across mucosal surfaces, which make up key first lines of host defense against pathogens. Mucosal immune responses play critical roles in host immune defense to provide durable and better recall responses. Substantial attention has been focused on developing effective mucosal vaccines to elicit robust localized and systemic immune responses by administration via mucosal routes. Mucosal vaccines that elicit effective immune responses yield protection superior to parenterally delivered vaccines. Beyond their valuable immunogenicity, mucosal vaccines can be less expensive and easier to administer without a need for injection materials and more highly trained personnel. However, developing effective mucosal vaccines faces many challenges, and much effort has been directed at their development. In this article, we review the history of mucosal vaccine development and present an overview of mucosal compartment biology and the roles that mucosal immunity plays in defending against infection, knowledge that has helped inform mucosal vaccine development. We explore new progress in mucosal vaccine design and optimization and novel approaches created to improve the efficacy and safety of mucosal vaccines.
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Affiliation(s)
- Yufeng Song
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22908, USA; (Y.S.)
| | - Frances Mehl
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22908, USA; (Y.S.)
| | - Steven L. Zeichner
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22908, USA; (Y.S.)
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
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5
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Freen-van Heeren JJ, Palomares Cabeza V, Lopez DC, Kivits D, Rensink I, Turksma AW, Ten Brinke A. Assessing Antigen-Specific T Cell Responses Through IFN-γ Enzyme-Linked Immune Absorbent Spot (ELISpot). Methods Mol Biol 2024; 2782:209-226. [PMID: 38622405 DOI: 10.1007/978-1-0716-3754-8_17] [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] [Indexed: 04/17/2024]
Abstract
T cells are instrumental in protecting the host against invading pathogens and the development of cancer. To do so, they produce effector molecules such as granzymes, interleukins, interferons, and perforin. For the development and immunomonitoring of therapeutic applications such as cell-based therapies and vaccines, assessing T cell effector function is paramount. This can be achieved through various methods, such as 51Cr release assays, flow cytometry, and enzyme-linked immune absorbent spot (ELISpot) assays. For T cell ELISpots, plates are coated with antibodies directed against the effector molecule of interest (e.g., IFN-g). Subsequently, peripheral blood mononuclear cells (PBMCs) or isolated T cells are cultured on the plate together with stimuli of choice, and the production of effector molecules is visualized via labeled detection antibodies. For clinical studies, ELISpot is currently the gold standard to determine antigen-specific T cell frequencies. In contrast to 51Cr release assays, ELISpot allows for the exact enumeration of responding T cells, and compared to flow cytometry, ELISpot is more cost-effective and high throughput. Here, we optimize and describe, in a step-by-step fashion, how to perform a controlled IFN-γ ELISpot experiment to determine the frequency of responding or antigen-specific T cells in healthy human volunteers. Of note, this protocol can also be employed to assess the frequency of antigen-specific T cells induced in, e.g., vaccination studies or present in cellular products.
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Affiliation(s)
| | - Virginia Palomares Cabeza
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Amsterdam, the Netherlands
| | - David Cobeta Lopez
- Immunomonitoring Services, R&D, Sanquin Diagnostic Services, Amsterdam, the Netherlands
| | - Domenique Kivits
- Immunomonitoring Services, R&D, Sanquin Diagnostic Services, Amsterdam, the Netherlands
| | - Irma Rensink
- Immunomonitoring Services, R&D, Sanquin Diagnostic Services, Amsterdam, the Netherlands
| | - Annelies W Turksma
- Immunomonitoring Services, R&D, Sanquin Diagnostic Services, Amsterdam, the Netherlands.
| | - Anja Ten Brinke
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Amsterdam, the Netherlands.
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6
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Mavi AK, Gaur S, Gaur G, Babita, Kumar N, Kumar U. CAR T-cell therapy: Reprogramming patient's immune cell to treat cancer. Cell Signal 2023; 105:110638. [PMID: 36822565 DOI: 10.1016/j.cellsig.2023.110638] [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: 01/24/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
Chimeric antigen receptor (CAR)-T cell therapy is a game changer in cancer treatment. Although CAR-T cell therapy has achieved significant clinical responses in specific subgroups of B cell leukaemia or lymphoma, various difficulties restrict CAR-T cell therapy's therapeutic effectiveness in solid tumours and haematological malignancies. Severe life-threatening toxicities, poor anti-tumour effectiveness, antigen escape, restricted trafficking, and limited tumour penetration are all barriers to successful CAR-T cell treatment. Furthermore, CAR-T cell interactions with the host and tumour microenvironment have a significant impact on their activity. Furthermore, developing and implementing these therapies necessitates a complicated staff. Innovative methodologies and tactics to engineering more potent CAR-T cells with greater anti-tumour activity and less toxicity are required to address these important difficulties.
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Affiliation(s)
- Anil Kumar Mavi
- Department of Pulmonary Medicine, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi 110007, India
| | - Sonal Gaur
- Department of Biosciences and Biotechnology, Banasthali Vidyapith, Jaipur, Rajasthan 304022, India
| | - Gauri Gaur
- Department of Biotechnology, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, Haryana 133203, India
| | - Babita
- Department of Pharmacology, Sharda School of Allied Health Sciences, Sharda University, Knowledge Park III, Greater Noida, Uttar Pradesh 201310, India
| | - Neelesh Kumar
- Department of Aquaculture, College of Fisheries, GB Pant University of Agriculture & Technology, Pantnagar, Udham Singh Nagar, Uttarakhand 263145, India
| | - Umesh Kumar
- School of Biosciences, Institute of Management Studies Ghaziabad (University Courses Campus), NH09, Adhyatmik Nagar, Ghaziabad, Uttar Pradesh 201015, India.
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7
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Raabe V, Lai L, Morales J, Xu Y, Rouphael N, Davey RT, Mulligan MJ. Cellular and humoral immunity to Ebola Zaire glycoprotein and viral vector proteins following immunization with recombinant vesicular stomatitis virus-based Ebola vaccine (rVSVΔG-ZEBOV-GP). Vaccine 2023; 41:1513-1523. [PMID: 36725433 PMCID: PMC10021073 DOI: 10.1016/j.vaccine.2023.01.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/01/2023]
Abstract
While effective at preventing Zaire ebolavirus (ZEBOV) disease, cellular immunity to ZEBOV and vector-directed immunity elicited by the recombinant vesicular stomatitis virus expressing ZEBOV glycoprotein (rVSVΔG-ZEBOV-GP) vaccine remain poorly understood. Sera and peripheral blood mononuclear cells were collected from 32 participants enrolled in a prospective multicenter study [ClinicalTrials.gov NCT02788227] before vaccination and up to six months post-vaccination. IgM and IgG antibodies, IgG-producing memory B cells (MBCs), and T cell reactivity to ZEBOV glycoprotein (ZEBOV-GP), vesicular stomatitis virus-Indiana strain (VSV-I) matrix (M) protein, and VSV-I nucleoprotein (NP) were measured using ELISA, ELISpot, and flow cytometry, respectively. 11/32 (34.4%) participants previously received a different investigational ZEBOV vaccine prior to enrollment and 21/32 (65.6%) participants were ZEBOV vaccine naïve. Both ZEBOV vaccine naïve and experienced participants had increased ZEBOV-GP IgG optical densities (ODs) post-rVSVΔG-ZEBOV-GP vaccination while only ZEBOV vaccine naïve participants had increased ZEBOV-GP IgM ODs. Transient IgM and IgG antibody responses to VSV-I M protein and NP were observed in a minority of participants. All participants had detectable ZEBOV-GP specific IgG-producing MBCs by 6 months post-vaccination while no changes were observed in the median IgG-producing MBCs to VSV-I proteins. T cell responses to ZEBOV-GP differed between ZEBOV vaccine experienced and ZEBOV vaccine naïve participants. T cell responses to both VSV-I M protein and VSV-I NP were observed, but were of a low magnitude. The rVSVΔG-ZEBOV-GP vaccine elicits robust humoral and memory B cell responses to ZEBOV glycoprotein in both ZEBOV vaccine naïve and experienced individuals and can generate vector-directed T cell immunity. Further research is needed to understand the significance of pre-existing vector and target antigen immunity on responses to booster doses of rVSVΔG-ZEBOV-GP and other rVSV-vectored vaccines.
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Affiliation(s)
- Vanessa Raabe
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, 500 Irvin Court, Suite 200, Decatur, GA 30030, USA.
| | - Lilin Lai
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, 500 Irvin Court, Suite 200, Decatur, GA 30030, USA.
| | - Juliet Morales
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, 500 Irvin Court, Suite 200, Decatur, GA 30030, USA.
| | - Yongxian Xu
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, 500 Irvin Court, Suite 200, Decatur, GA 30030, USA.
| | - Nadine Rouphael
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, 500 Irvin Court, Suite 200, Decatur, GA 30030, USA.
| | - Richard T Davey
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, 10 Center Drive, Rm. 4-1479, MSC 1460, Bethesda, MD 20892, USA.
| | - Mark J Mulligan
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, 500 Irvin Court, Suite 200, Decatur, GA 30030, USA.
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8
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Venturas JP. HIV and COVID-19 Disease. Semin Respir Crit Care Med 2023; 44:35-49. [PMID: 36646084 DOI: 10.1055/s-0042-1758852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Despite effective antiretroviral therapy (ART), HIV infected individuals throughout the world remain at significant risk of respiratory infections and non-communicable disease. Severe disease from SARS-CoV-2 is associated with a hyperinflammatory phenotype which manifests in the lungs as pneumonia and in some cases can lead to acute respiratory failure. Progression to severe COVID-19 is associated with comorbid disease such as obesity, diabetes mellitus and cardiovascular disease, however data concerning the associated risks of HIV coinfection are still conflicting, with large population studies demonstrating poorer outcomes, whilst smaller, case-controlled studies showing better outcomes. Furthermore, underlying immunopathological processes within the lungs and elsewhere, including interactions with other opportunistic infections (OI), remain largely undefined. Nonetheless, new and repurposed anti-viral therapies and vaccines which have been developed are safe to use in this population, and anti-inflammatory agents are recommended with the caveat that the coexistence of opportunistic infections is considered and excluded. Finally, HIV infected patients remain reliant on good ART adherence practices to maintain HIV viral suppression, and some of these practices were disrupted during the COVID-19 pandemic, putting these patients at further risk for acute and long-term adverse outcomes.
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Affiliation(s)
- Jacqui P Venturas
- Department of Internal Medicine and Pulmonology, Charlotte Maxeke Johannesburg Academic Hospital and Universtity of the Witwatersrand, Johannesburg, South Africa
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9
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Groeneveldt C, van den Ende J, van Montfoort N. Preexisting immunity: Barrier or bridge to effective oncolytic virus therapy? Cytokine Growth Factor Rev 2023; 70:1-12. [PMID: 36732155 DOI: 10.1016/j.cytogfr.2023.01.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 02/01/2023]
Abstract
Oncolytic viruses (OVs) represent a highly promising treatment strategy for a wide range of cancers, by mediating both the direct killing of tumor cells as well as mobilization of antitumor immune responses. As many OVs circulate in the human population, preexisting OV-specific immune responses are prevalent. Indeed, neutralizing antibodies (NAbs) are abundantly present in the human population for commonly used OVs, such as Adenovirus type 5 (Ad5), Herpes Simplex Virus-1 (HSV-1), Vaccinia virus, Measles virus, and Reovirus. This review discusses (pre)clinical evidence regarding the effect of preexisting immunity against OVs on two distinct aspects of OV therapy; OV infection and spread, as well as the immune response induced upon OV therapy. Combined, this review provides evidence that consideration of preexisting immunity is crucial in realizing the full potential of the highly promising therapeutic implementation of OVs. Future investigation of current gaps in knowledge highlighted in this review should yield a more complete understanding of this topic, ultimately allowing for better and more personalized OV therapies.
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Affiliation(s)
- Christianne Groeneveldt
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands.
| | - Jasper van den Ende
- Master Infection & Immunity, Utrecht University, 3584 CS Utrecht, the Netherlands
| | - Nadine van Montfoort
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, 2333 ZA, Leiden, the Netherlands
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10
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Bockstal V, Shukarev G, McLean C, Goldstein N, Bart S, Gaddah A, Anumenden D, Stoop JN, Marit de Groot A, Pau MG, Hendriks J, De Rosa SC, Cohen KW, McElrath MJ, Callendret B, Luhn K, Douoguih M, Robinson C. First-in-human study to evaluate safety, tolerability, and immunogenicity of heterologous regimens using the multivalent filovirus vaccines Ad26.Filo and MVA-BN-Filo administered in different sequences and schedules: A randomized, controlled study. PLoS One 2022; 17:e0274906. [PMID: 36197845 PMCID: PMC9534391 DOI: 10.1371/journal.pone.0274906] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 07/22/2022] [Indexed: 11/05/2022] Open
Abstract
Background Though clinically similar, Ebola virus disease and Marburg virus disease are caused by different viruses. Of the 30 documented outbreaks of these diseases in sub-Saharan Africa, eight were major outbreaks (≥200 cases; five caused by Zaire ebolavirus [EBOV], two by Sudan ebolavirus [SUDV], and one by Marburg virus [MARV]). Our purpose is to develop a multivalent vaccine regimen protecting against each of these filoviruses. This first-in-human study assessed the safety and immunogenicity of several multivalent two-dose vaccine regimens that contain Ad26.Filo and MVA-BN-Filo. Methods Ad26.Filo combines three vaccines encoding the glycoprotein (GP) of EBOV, SUDV, and MARV. MVA-BN-Filo is a multivalent vector encoding EBOV, SUDV, and MARV GPs, and Taï Forest nucleoprotein. This Phase 1, randomized, double-blind, placebo-controlled study enrolled healthy adults (18–50 years) into four groups, randomized 5:1 (active:placebo), to assess different Ad26.Filo and MVA-BN-Filo vaccine directionality and administration intervals. The primary endpoint was safety; immune responses against EBOV, SUDV, and MARV GPs were also assessed. Results Seventy-two participants were randomized, and 60 (83.3%) completed the study. All regimens were well tolerated with no deaths or vaccine-related serious adverse events (AEs). The most frequently reported solicited local AE was injection site pain/tenderness. Solicited systemic AEs most frequently reported were headache, fatigue, chills, and myalgia; most solicited AEs were Grade 1–2. Solicited/unsolicited AE profiles were similar between regimens. Twenty-one days post-dose 2, 100% of participants on active regimen responded to vaccination and exhibited binding antibodies against EBOV, SUDV, and MARV GPs; neutralizing antibody responses were robust against EBOV (85.7–100%), but lower against SUDV (35.7–100%) and MARV (0–57.1%) GPs. An Ad26.Filo booster induced a rapid further increase in humoral responses. Conclusion This study demonstrates that heterologous two-dose vaccine regimens with Ad26.Filo and MVA-BN-Filo are well tolerated and immunogenic in healthy adults. ClinicalTrials.gov NCT02860650.
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Affiliation(s)
- Viki Bockstal
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Georgi Shukarev
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Chelsea McLean
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
- * E-mail:
| | - Neil Goldstein
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Stephan Bart
- Optimal Research, LLC, Rockville, Maryland, United States of America
| | - Auguste Gaddah
- Janssen Infectious Diseases and Vaccines, Beerse, Belgium
| | | | - Jeroen N. Stoop
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | | | - Maria G. Pau
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Jenny Hendriks
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Stephen C. De Rosa
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Kristen W. Cohen
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - M. Juliana McElrath
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | | | - Kerstin Luhn
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Macaya Douoguih
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Cynthia Robinson
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
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11
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Charles T, Moss DL, Bhat P, Moore PW, Kummer NA, Bhattacharya A, Landry SJ, Mettu RR. CD4+ T-Cell Epitope Prediction by Combined Analysis of Antigen Conformational Flexibility and Peptide-MHCII Binding Affinity. Biochemistry 2022; 61:1585-1599. [PMID: 35834502 PMCID: PMC9352311 DOI: 10.1021/acs.biochem.2c00237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Antigen processing in the class II MHC pathway depends
on conventional
proteolytic enzymes, potentially acting on antigens in native-like
conformational states. CD4+ epitope dominance arises from a competition
among antigen folding, proteolysis, and MHCII binding. Protease-sensitive
sites, linear antibody epitopes, and CD4+ T-cell epitopes were mapped
in plague vaccine candidate F1-V to evaluate the various contributions
to CD4+ epitope dominance. Using X-ray crystal structures, antigen
processing likelihood (APL) predicts CD4+ epitopes with significant
accuracy for F1-V without considering peptide-MHCII binding affinity.
We also show that APL achieves excellent performance over two benchmark
antigen sets. The profiles of conformational flexibility derived from
the X-ray crystal structures of the F1-V proteins, Caf1 and LcrV,
were similar to the biochemical profiles of linear antibody epitope
reactivity and protease sensitivity, suggesting that the role of structure
in proteolysis was captured by the analysis of the crystal structures.
The patterns of CD4+ T-cell epitope dominance in C57BL/6, CBA, and
BALB/c mice were compared to epitope predictions based on APL, MHCII
binding, or both. For a sample of 13 diverse antigens, the accuracy
of epitope prediction by the combination of APL and I-Ab-MHCII-peptide affinity reached 36%. When MHCII allele specificity
was also diverse, such as in human immunity, prediction of dominant
epitopes by APL alone reached 42% when using a stringent scoring threshold.
Because dominant CD4+ epitopes tend to occur in conformationally stable
antigen domains, crystal structures typically are available for analysis
by APL, and thus, the requirement for a crystal structure is not a
severe limitation.
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Affiliation(s)
- Tysheena Charles
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, Louisiana 70112, United States
| | - Daniel L Moss
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, Louisiana 70112, United States
| | - Pawan Bhat
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, Louisiana 70112, United States
| | - Peyton W Moore
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, Louisiana 70112, United States
| | - Nicholas A Kummer
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, Louisiana 70112, United States
| | - Avik Bhattacharya
- Department of Computer Science, Tulane University, New Orleans, Louisiana 70118, United States
| | - Samuel J Landry
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, Louisiana 70112, United States
| | - Ramgopal R Mettu
- Department of Computer Science, Tulane University, New Orleans, Louisiana 70118, United States
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12
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Wang Q, Ma X, Wu H, Zhao C, Chen J, Li R, Yan S, Li Y, Zhang Q, Song K, Yuan C, Kong B. Oncolytic adenovirus with MUC16-BiTE shows enhanced antitumor immune response by reversing the tumor microenvironment in PDX model of ovarian cancer. Oncoimmunology 2022; 11:2096362. [PMID: 35800156 PMCID: PMC9255048 DOI: 10.1080/2162402x.2022.2096362] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Qiuman Wang
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Xinyue Ma
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Huan Wu
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Chen Zhao
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Jingying Chen
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Rongrong Li
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Shi Yan
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Yingwei Li
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Qing Zhang
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Kun Song
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Cunzhong Yuan
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
| | - Beihua Kong
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
- Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Ji’nan, Shandong, China
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13
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Combination therapy with CAR T cells and oncolytic viruses: a new era in cancer immunotherapy. Cancer Gene Ther 2022; 29:647-660. [PMID: 34158626 DOI: 10.1038/s41417-021-00359-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 05/16/2021] [Accepted: 05/28/2021] [Indexed: 02/06/2023]
Abstract
Chimeric antigen receptor (CAR) T-cell therapy is an encouraging and fast-growing platform used for the treatment of various types of tumors in human body. Despite the recent success of CAR T-cell therapy in hematologic malignancies, especially in B-cell lymphoma and acute lymphoblastic leukemia, the application of this treatment approach in solid tumors faced several obstacles resulted from the heterogeneous expression of antigens as well as the induction of immunosuppressive tumor microenvironment. Oncolytic virotherapy (OV) is a new cancer treatment modality by the use of competent or genetically engineered viruses to replicate in tumor cells selectively. OVs represent potential candidates to synergize the current setbacks of CAR T-cell application in solid tumors and then and overcome them. As well, the application of OVs gives researches the ability to engineer the virus with payloads in the way that it selectively deliver a specific therapeutic agents in tumor milieu to reinforce the cytotoxic activity of CAR T cells. Herein, we made a comprehensive review on the outcomes resulted from the combination of CAR T-cell immunotherapy and oncolytic virotherapy for the treatment of solid cancers. In the current study, we also provided brief details on some challenges that remained in this field and attempted to shed a little light on the future perspectives.
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14
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Mardi A, Shirokova AV, Mohammed RN, Keshavarz A, Zekiy AO, Thangavelu L, Mohamad TAM, Marofi F, Shomali N, Zamani A, Akbari M. Biological causes of immunogenic cancer cell death (ICD) and anti-tumor therapy; Combination of Oncolytic virus-based immunotherapy and CAR T-cell therapy for ICD induction. Cancer Cell Int 2022; 22:168. [PMID: 35488303 PMCID: PMC9052538 DOI: 10.1186/s12935-022-02585-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 04/11/2022] [Indexed: 12/22/2022] Open
Abstract
Chimeric antigen receptor (CAR) T-cell therapy is a promising and rapidly expanding therapeutic option for a wide range of human malignancies. Despite the ongoing progress of CAR T-cell therapy in hematologic malignancies, the application of this therapeutic strategy in solid tumors has encountered several challenges due to antigen heterogeneity, suboptimal CAR T-cell trafficking, and the immunosuppressive features of the tumor microenvironment (TME). Oncolytic virotherapy is a novel cancer therapy that employs competent or genetically modified oncolytic viruses (OVs) to preferentially proliferate in tumor cells. OVs in combination with CAR T-cells are promising candidates for overcoming the current drawbacks of CAR T-cell application in tumors through triggering immunogenic cell death (ICD) in cancer cells. ICD is a type of cellular death in which danger-associated molecular patterns (DAMPs) and tumor-specific antigens are released, leading to the stimulation of potent anti-cancer immunity. In the present review, we discuss the biological causes of ICD, different types of ICD, and the synergistic combination of OVs and CAR T-cells to reach potent tumor-specific immunity.
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Affiliation(s)
- Amirhossein Mardi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Anastasia V Shirokova
- Department of Prosthetic Dentistry, I. M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Rebar N Mohammed
- Medical Laboratory Analysis Department, College of Health Science, Cihan University of Sulaimaniya, Suleimanyah, Kurdistan region, Iraq.,College of. Veterinary Medicine, University of Sulaimani, Suleimanyah, Iraq
| | - Ali Keshavarz
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Angelina O Zekiy
- Department of Prosthetic Dentistry, I. M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Lakshmi Thangavelu
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Science, Saveetha University, Chennai, India
| | - Talar Ahmad Merza Mohamad
- Department of Pharmacology and Toxicology, Clinical Pharmacy, Hawler Medical University, College of Pharmacy, Kurdistan Region-Erbil, Iraq
| | - Faroogh Marofi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Navid Shomali
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Zamani
- Shiraz Transplant Center, Abu Ali Sina Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Morteza Akbari
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. .,Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
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15
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A century of attempts to develop an effective tuberculosis vaccine: Why they failed? Int Immunopharmacol 2022; 109:108791. [PMID: 35487086 DOI: 10.1016/j.intimp.2022.108791] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/18/2022] [Accepted: 04/18/2022] [Indexed: 11/23/2022]
Abstract
Tuberculosis (TB) remains a major global health problem despite widespread use of the Bacillus BCG vaccine. This situation is worsened by co-infection with HIV, and the development of multidrug-resistant Mycobacterium tuberculosis (Mtb) strains. Thus, novel vaccine candidates and improved vaccination strategies are urgently needed in order to reduce the incidence of TB and even to eradicate TB by 2050. Over the last few decades, 23 novel TB vaccines have entered into clinical trials, more than 13 new vaccines have reached various stages of preclinical development, and more than 50 potential candidates are in the discovery stage as next-generation vaccines. Nevertheless, why has a century of attempts to introduce an effective TB vaccine failed? Who should be blamed -scientists, human response, or Mtb strategies? Literature review reveals that the elimination of latent or active Mtb infections in a given population seems to be an epigenetic process. With a better understanding of the connections between bacterial infections and gene expression conditions in epigenetic events, opportunities arise in designing protective vaccines or therapeutic agents, particularly as epigenetic processes can be reversed. Therefore, this review provides a brief overview of different approaches towards novel vaccination strategies and the mechanisms underlying these approaches.
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16
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Convergent clonal selection of donor- and recipient-derived CMV-specific T cells in hematopoietic stem cell transplant patients. Proc Natl Acad Sci U S A 2022; 119:2117031119. [PMID: 35105810 PMCID: PMC8833188 DOI: 10.1073/pnas.2117031119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2022] [Indexed: 12/04/2022] Open
Abstract
An existing memory T cell population specific for a single epitope is sufficient to effectively curtail responses to any new antigens if the original epitope is present in a vaccination regimen or heterologous infections. We asked if T cell competition precludes recruitment of any new, naïve T cells to an existing memory T cell pool in context of cytomegalovirus-specific T cell responses in a cohort of transplant patients. Our data indicate that competition does not prevent recruitment of naïve T cells into the memory T cell pool but selects for T cells with nearly or fully congruent T cell receptor specificities. We discuss the implications of rejuvenating a memory T cell pool while preserving the T cell receptor repertoire. Competition between antigen-specific T cells for peptide:MHC complexes shapes the ensuing T cell response. Mouse model studies provided compelling evidence that competition is a highly effective mechanism controlling the activation of naïve T cells. However, assessing the effect of T cell competition in the context of a human infection requires defined pathogen kinetics and trackable naïve and memory T cell populations of defined specificity. A unique cohort of nonmyeloablative hematopoietic stem cell transplant patients allowed us to assess T cell competition in response to cytomegalovirus (CMV) reactivation, which was documented with detailed virology data. In our cohort, hematopoietic stem cell transplant donors and recipients were CMV seronegative and positive, respectively, thus providing genetically distinct memory and naïve T cell populations. We used single-cell transcriptomics to track donor versus recipient-derived T cell clones over the course of 90 d. We found that donor-derived T cell clones proliferated and expanded substantially following CMV reactivation. However, for immunodominant CMV epitopes, recipient-derived memory T cells remained the overall dominant population. This dominance was maintained despite more robust clonal expansion of donor-derived T cells in response to CMV reactivation. Interestingly, the donor-derived T cells that were recruited into these immunodominant memory populations shared strikingly similar TCR properties with the recipient-derived memory T cells. This selective recruitment of identical and nearly identical clones from the naïve into the immunodominant memory T cell pool suggests that competition is in place but does not interfere with rejuvenating a memory T cell population. Instead, it results in selection of convergent clones to the memory T cell pool.
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17
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Jeewandara C, Fernando S, Pushpakumara PD, Ramu ST, Kamaladasa A, Gunasekara B, Aberathna IS, Kuruppu H, Ranasinghe T, Dayarathne S, Dissanayake O, Gamalath N, Ekanayake D, Jayamali J, Wijesinghe A, Dissanayake M, Somathilake G, Harvie M, Danasekara S, Jayathilaka D, Wijayatilake HDK, Weerasooriya N, Kekulandara C, Schimanski L, Rijal P, Tan TK, Dong T, Townsend A, Ogg GS, Malavige GN. Immune responses following the first dose of the Sputnik V (Gam-COVID-Vac). Sci Rep 2022; 12:1727. [PMID: 35110645 PMCID: PMC8810924 DOI: 10.1038/s41598-022-05788-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 01/12/2022] [Indexed: 01/08/2023] Open
Abstract
As the first dose of Gam-COVID-Vac, is currently used as a single dose vaccine in some countries, we investigated the immunogenicity of this at 4 weeks (327 naïve individuals). 88.7% seroconverted, with significantly lower seroconversion rates in those over 60 years (p = 0.004) and significantly lower than previously seen with AZD1222 (p = 0.018). 82.6% developed ACE2 receptor blocking antibodies, although levels were significantly lower than following natural infection (p = 0.0009) and a single dose of AZD1222 (p < 0.0001). Similar titres of antibodies were observed to the receptor binding domain of WT, B.1.1.7 and B.1.617.2 compared to AZD1222, while the levels for B.1.351 were significantly higher (p = 0.006) for Gam-COVID-Vac. 30% developed ex vivo IFNγ ELISpot responses (significantly lower than AZD1222), and high frequency of CD107a expressing T cells along with memory B cell responses. Although single dose of Gam-COVID-Vac was highly immunogenic, administration of a second dose is likely to be beneficial.
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Affiliation(s)
- Chandima Jeewandara
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | | | - Pradeep Darshana Pushpakumara
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Shyrar Tanussiya Ramu
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Achala Kamaladasa
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Banuri Gunasekara
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Inoka Sepali Aberathna
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Heshan Kuruppu
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Thushali Ranasinghe
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Shashika Dayarathne
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Osanda Dissanayake
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Nayanathara Gamalath
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Dinithi Ekanayake
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Jewantha Jayamali
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Ayesha Wijesinghe
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Madushika Dissanayake
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Gayasha Somathilake
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Michael Harvie
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Saubhagya Danasekara
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | - Deshni Jayathilaka
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | | | | | | | - Lisa Schimanski
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Pramila Rijal
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Tiong K Tan
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Tao Dong
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Alain Townsend
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Graham S Ogg
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Centre for Translational Immunology, Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Gathsaurie Neelika Malavige
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka.
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK.
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18
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Pavia CS, Plummer MM. COVID-19 vaccines for high risk and immunocompromised patients. METHODS IN MICROBIOLOGY 2022; 50:269-279. [PMID: 38620783 PMCID: PMC8797165 DOI: 10.1016/bs.mim.2021.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The availability of multiple versions of vaccines designed to help prevent COVID-19 has offered an opportunity to at least control the current pandemic, and possibly to quickly eradicate this disease fully, along with the implementation of other preventive measures. In order to accomplish this feat more effectively, as many people as possible need to be vaccinated, especially for high-risk groups having co-morbid conditions such as diabetes, obesity and old age, and possibly those with various forms of immunodeficiencies, such as HIV/AIDS. This chapter focuses primarily on some of the basic biomedical aspects on vaccine design and use, and any possible concerns that need to be considered in getting people in the high-risk category vaccinated and monitored thereafter for their continuous health and well-being.
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Affiliation(s)
- Charles S Pavia
- Department of Biomedical Sciences, NYIT College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY, United States
- Division of Infectious Diseases, New York Medical College, Valhalla, NY, United States
| | - Maria M Plummer
- Department of Clinical Specialties, Division of Pathology, NYIT College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY, United States
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19
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Plummer MM, Pavia CS. COVID-19 Vaccines for HIV-Infected Patients. Viruses 2021; 13:1890. [PMID: 34696319 PMCID: PMC8540182 DOI: 10.3390/v13101890] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 12/21/2022] Open
Abstract
Nearly 40 years have passed since the initial cases of infection with the human mmunodeficiency virus (HIV) were identified as a new disease entity and the cause of acquired immunodeficiency disease (AIDS). This virus, unlike any other, is capable of causing severe suppression of our adaptive immune defense mechanisms by directly infecting and destroying helper T cells leading to increased susceptibility to a wide variety of microbial pathogens, especially those considered to be intracellular or opportunistic. After T cells are infected, HIV reproduces itself via a somewhat unique mechanism involving various metabolic steps, which includes the use of a reverse transcriptase enzyme that enables the viral RNA to produce copies of its complementary DNA. Subsequent physiologic steps lead to the production of new virus progeny and the eventual death of the invaded T cell. Fortunately, both serologic and molecular tests (such as PCR) can be used to confirm the diagnosis of an HIV infection. In the wake of the current COVID-19 pandemic, it appears that people living with HIV/AIDS are equally or slightly more susceptible to the etiologic agent, SARS-CoV-2, than the general population having intact immune systems, but they may have more serious outcomes. Limited clinical trials have also shown that the currently available COVID-19 vaccines are both safe and effective in affording protection to HIV/AIDS patients. In this review, we further explore the unique dynamic of HIV/AIDS in the context of the worldwide COVID-19 pandemic and the implementation of vaccines as a protective measure against COVID-19, as well as what immune parameters and safeguards should be monitored in this immunocompromised group following vaccination.
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Affiliation(s)
- Maria M. Plummer
- Department of Clinical Specialties, Division of Pathology, New York Institute of Technology, NYIT College of Osteopathic Medicine, Old Westbury, NY 11568, USA;
| | - Charles S. Pavia
- Department of Biomedical Sciences, New York Institute of Technology, NYIT College of Osteopathic Medicine, Old Westbury, NY 11568, USA
- Division of Infectious Diseases, New York Medical College, Valhalla, NY 10595, USA
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20
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Cargill T, Barnes E. Therapeutic vaccination for treatment of chronic hepatitis B. Clin Exp Immunol 2021; 205:106-118. [PMID: 33969474 PMCID: PMC8274149 DOI: 10.1111/cei.13614] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic hepatitis B infection remains a serious global health threat, contributing to a large number of deaths through liver cirrhosis and hepatocellular carcinoma. Current treatment does not eradicate disease, and therefore new treatments are urgently needed. In acute hepatitis B virus (HBV) a strong immune response is necessary to clear the virus, but in chronic infection the immune response is weakened and dysfunctional. Therapeutic vaccination describes the process of inoculating individuals with a non‐infective form of viral antigen with the aim of inducing or boosting existing HBV‐specific immune responses, resulting in sustained control of HBV infection. In this review we outline the rationale for therapeutic vaccination in chronic HBV infection, discuss previous and ongoing trials of novel HBV therapeutic vaccine candidates and outline strategies to improve vaccine efficacy going forward.
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Affiliation(s)
- Tamsin Cargill
- Peter Medawar Building for Pathogen Research, Oxford University, Oxford, United Kingdom.,Translational Gastroenterology Unit, Oxford University, Oxford, United Kingdom
| | - Eleanor Barnes
- Peter Medawar Building for Pathogen Research, Oxford University, Oxford, United Kingdom.,Translational Gastroenterology Unit, Oxford University, Oxford, United Kingdom.,Oxford NIHR Biomedical Research Centre and Nuffield Department of Medicine, Oxford University, Oxford, United Kingdom
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21
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Custers J, Kim D, Leyssen M, Gurwith M, Tomaka F, Robertson J, Heijnen E, Condit R, Shukarev G, Heerwegh D, van Heesbeen R, Schuitemaker H, Douoguih M, Evans E, Smith ER, Chen RT. Vaccines based on replication incompetent Ad26 viral vectors: Standardized template with key considerations for a risk/benefit assessment. Vaccine 2021; 39:3081-3101. [PMID: 33676782 PMCID: PMC7532807 DOI: 10.1016/j.vaccine.2020.09.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 09/02/2020] [Indexed: 11/29/2022]
Abstract
Replication-incompetent adenoviral vectors have been under investigation as a platform to carry a variety of transgenes, and express them as a basis for vaccine development. A replication-incompetent adenoviral vector based on human adenovirus type 26 (Ad26) has been evaluated in several clinical trials. The Brighton Collaboration Viral Vector Vaccines Safety Working Group (V3SWG) was formed to evaluate the safety and features of recombinant viral vector vaccines. This paper reviews features of the Ad26 vectors, including tabulation of safety and risk assessment characteristics of Ad26-based vaccines. In the Ad26 vector, deletion of E1 gene rendering the vector replication incompetent is combined with additional genetic engineering for vaccine manufacturability and transgene expression optimization. These vaccines can be manufactured in mammalian cell lines at scale providing an effective, flexible system for high-yield manufacturing. Ad26 vector vaccines have favorable thermostability profiles, compatible with vaccine supply chains. Safety data are compiled in the Ad26 vaccine safety database version 4.0, with unblinded data from 23 ongoing and completed clinical studies for 3912 participants in five different Ad26-based vaccine programs. Overall, Ad26-based vaccines have been well tolerated, with no significant safety issues identified. Evaluation of Ad26-based vaccines is continuing, with >114,000 participants vaccinated as of 4th September 2020. Extensive evaluation of immunogenicity in humans shows strong, durable humoral and cellular immune responses. Clinical trials have not revealed impact of pre-existing immunity to Ad26 on vaccine immunogenicity, even in the presence of Ad26 neutralizing antibody titers or Ad26-targeting T cell responses at baseline. The first Ad26-based vaccine, against Ebola virus, received marketing authorization from EC on 1st July 2020, as part of the Ad26.ZEBOV, MVA-BN-Filo vaccine regimen. New developments based on Ad26 vectors are underway, including a COVID-19 vaccine, which is currently in phase 3 of clinical evaluation.
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Affiliation(s)
| | - Denny Kim
- Janssen Research & Development, Titusville, NJ, USA
| | | | - Marc Gurwith
- Brighton Collaboration, A Program of the Task Force for Global Health, Decatur, GA, USA
| | - Frank Tomaka
- Janssen Research & Development, Titusville, NJ, USA
| | | | | | - Richard Condit
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL, USA
| | | | | | | | | | | | - Eric Evans
- Brighton Collaboration, A Program of the Task Force for Global Health, Decatur, GA, USA
| | - Emily R Smith
- Brighton Collaboration, A Program of the Task Force for Global Health, Decatur, GA, USA
| | - Robert T Chen
- Brighton Collaboration, A Program of the Task Force for Global Health, Decatur, GA, USA
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22
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The immunological impact of adenovirus early genes on vaccine-induced responses in mice and nonhuman primates. J Virol 2021; 95:JVI.02253-20. [PMID: 33441339 PMCID: PMC8092689 DOI: 10.1128/jvi.02253-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Adenovirus (Ad) is being explored for use in the prevention and treatment of a variety of infectious diseases and cancers. Ad with a deletion in early region 3 (ΔE3) provokes a stronger immune response than Ad with deletions in early regions 1 and E3 (ΔE1/ΔE3). The ΔE1/ΔE3 Ads are more popular because they can carry a larger transgene and because of the deleted E1 (E1A and E1B), are perceived safer for clinical use. Ad with a deletion in E1B55K (ΔE1B55K) has been in phase III clinical trials for use in cancer therapy in the US and has been approved for use in head and neck tumor therapy in China, demonstrating that Ad containing E1A are safe for clinical use. We have shown previously that ΔE1B55K Ad, even while promoting lower levels of an inserted transgene, promoted similar levels of transgene-specific immune responses as a ΔE3 Ad. Products of the Ad early region 4 (E4) limit the ability of cells to mount an innate immune response. Using this knowledge, we deleted the Ad E4 open reading frames 1-4 (E4orf1-4) from the ΔE1B55K Ad. Here, we show that innate cytokine network genes are elevated in the ΔE4 Ad-infected cells beyond that of ΔE3 Ad-infected cells. Further, in immunized mice the IgG2a subclass was favored as was the IgG1 subclass in immunized nonhuman primates. Thus, Ad E4 impacts immune responses in cells, in immunized mice, and immunized nonhuman primates. These Ad may offer advantages that are beneficial for clinical use.Importance: Adenovirus (Ad) is being explored for use in the prevention and treatment of a variety of infectious diseases and cancers. Here we provide evidence in cells, mice, and nonhuman primates supporting the notion that Ad early gene-products limit specific immune responses. Ad constructed with deletions in early genes and expressing HIV envelope protein was shown to induce greater HIV-specific cellular immune responses and higher titer antibodies compared to the parental Ad with the early genes. In addition to eliciting enhanced immunity, the deleted Ad possesses more space for insertion of additional or larger transgenes needed for targeting other infectious agents or cancers.
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Bonilla WV, Kirchhammer N, Marx AF, Kallert SM, Krzyzaniak MA, Lu M, Darbre S, Schmidt S, Raguz J, Berka U, Vincenti I, Pauzuolis M, Kerber R, Hoepner S, Günther S, Magnus C, Merkler D, Orlinger KK, Zippelius A, Pinschewer DD. Heterologous arenavirus vector prime-boost overrules self-tolerance for efficient tumor-specific CD8 T cell attack. CELL REPORTS MEDICINE 2021; 2:100209. [PMID: 33763654 PMCID: PMC7974551 DOI: 10.1016/j.xcrm.2021.100209] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/16/2020] [Accepted: 02/04/2021] [Indexed: 02/06/2023]
Abstract
Therapeutic vaccination regimens inducing clinically effective tumor-specific CD8+ T lymphocyte (CTL) responses are an unmet medical need. We engineer two distantly related arenaviruses, Pichinde virus and lymphocytic choriomeningitis virus, for therapeutic cancer vaccination. In mice, life-replicating vector formats of these two viruses delivering a self-antigen in a heterologous prime-boost regimen induce tumor-specific CTL responses up to 50% of the circulating CD8 T cell pool. This CTL attack eliminates established solid tumors in a significant proportion of animals, accompanied by protection against tumor rechallenge. The magnitude of CTL responses is alarmin driven and requires combining two genealogically distantly related arenaviruses. Vector-neutralizing antibodies do not inhibit booster immunizations by the same vector or by closely related vectors. Rather, CTL immunodominance hierarchies favor vector backbone-targeted responses at the expense of self-reactive CTLs. These findings establish an arenavirus-based immunotherapy regimen that allows reshuffling of immunodominance hierarchies and breaking self-directed tolerance for efficient tumor control. Engineered arenaviruses induce potent tumor self-specific CD8 T cell (CTL) response Combinations of distantly but not closely related arenavirus vectors eliminate tumors Vector backbone-targeted CTL responses compete against tumor self-reactive CTLs Optimized vector combinations reshuffle immunodominance to break self-tolerance
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Affiliation(s)
- Weldy V Bonilla
- University of Basel, Department of Biomedicine, Basel, Switzerland
| | | | | | - Sandra M Kallert
- University of Basel, Department of Biomedicine, Basel, Switzerland
| | | | - Min Lu
- University of Basel, Department of Biomedicine, Basel, Switzerland
| | - Stéphanie Darbre
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | | | | | | | - Ilena Vincenti
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Mindaugas Pauzuolis
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Romy Kerber
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Sabine Hoepner
- Tumor Immunology, Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Stephan Günther
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Carsten Magnus
- Institute of Virology, University of Zurich, Zurich, Switzerland
| | - Doron Merkler
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland.,Division of Clinical Pathology, University Hospitals of Geneva, Geneva, Switzerland
| | | | - Alfred Zippelius
- University of Basel, Department of Biomedicine, Basel, Switzerland.,Medical Oncology, University Hospital Basel, Basel, Switzerland
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24
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Page K, Melia MT, Veenhuis RT, Winter M, Rousseau KE, Massaccesi G, Osburn WO, Forman M, Thomas E, Thornton K, Wagner K, Vassilev V, Lin L, Lum PJ, Giudice LC, Stein E, Asher A, Chang S, Gorman R, Ghany MG, Liang TJ, Wierzbicki MR, Scarselli E, Nicosia A, Folgori A, Capone S, Cox AL. Randomized Trial of a Vaccine Regimen to Prevent Chronic HCV Infection. N Engl J Med 2021; 384:541-549. [PMID: 33567193 PMCID: PMC8367093 DOI: 10.1056/nejmoa2023345] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND A safe and effective vaccine to prevent chronic hepatitis C virus (HCV) infection is a critical component of efforts to eliminate the disease. METHODS In this phase 1-2 randomized, double-blind, placebo-controlled trial, we evaluated a recombinant chimpanzee adenovirus 3 vector priming vaccination followed by a recombinant modified vaccinia Ankara boost; both vaccines encode HCV nonstructural proteins. Adults who were considered to be at risk for HCV infection on the basis of a history of recent injection drug use were randomly assigned (in a 1:1 ratio) to receive vaccine or placebo on days 0 and 56. Vaccine-related serious adverse events, severe local or systemic adverse events, and laboratory adverse events were the primary safety end points. The primary efficacy end point was chronic HCV infection, defined as persistent viremia for 6 months. RESULTS A total of 548 participants underwent randomization, with 274 assigned to each group. There was no significant difference in the incidence of chronic HCV infection between the groups. In the per-protocol population, chronic HCV infection developed in 14 participants in each group (hazard ratio [vaccine vs. placebo], 1.53; 95% confidence interval [CI], 0.66 to 3.55; vaccine efficacy, -53%; 95% CI, -255 to 34). In the modified intention-to-treat population, chronic HCV infection developed in 19 participants in the vaccine group and 17 in placebo group (hazard ratio, 1.66; 95% CI, 0.79 to 3.50; vaccine efficacy, -66%; 95% CI, -250 to 21). The geometric mean peak HCV RNA level after infection differed between the vaccine group and the placebo group (152.51×103 IU per milliliter and 1804.93×103 IU per milliliter, respectively). T-cell responses to HCV were detected in 78% of the participants in the vaccine group. The percentages of participants with serious adverse events were similar in the two groups. CONCLUSIONS In this trial, the HCV vaccine regimen did not cause serious adverse events, produced HCV-specific T-cell responses, and lowered the peak HCV RNA level, but it did not prevent chronic HCV infection. (Funded by the National Institute of Allergy and Infectious Diseases; ClinicalTrials.gov number, NCT01436357.).
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Affiliation(s)
- Kimberly Page
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Michael T Melia
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Rebecca T Veenhuis
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Matthew Winter
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Kimberly E Rousseau
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Guido Massaccesi
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - William O Osburn
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Michael Forman
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Elaine Thomas
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Karla Thornton
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Katherine Wagner
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Ventzislav Vassilev
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Lan Lin
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Paula J Lum
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Linda C Giudice
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Ellen Stein
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Alice Asher
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Soju Chang
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Richard Gorman
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Marc G Ghany
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - T Jake Liang
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Michael R Wierzbicki
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Elisa Scarselli
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Alfredo Nicosia
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Antonella Folgori
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Stefania Capone
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
| | - Andrea L Cox
- From the University of New Mexico, Albuquerque (K.P., E.T., K.T., K.W.); Johns Hopkins University, Baltimore (M.T.M., R.T.V., M.W., K.E.R., G.M., W.O.O., M.F., A.L.C.), the Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases (S. Chang, R.G.), and the Emmes Company (M.R.W.), Rockville, and the Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda (M.G.G., T.J.L.) - all in Maryland; GSK Vaccines, Rixensart, Belgium (V.V., L.L.); the University of California, San Francisco, San Francisco (P.J.L., L.C.G., E. Stein, A.A.); the Centers for Disease Control and Prevention, Office of Policy, Planning, and Partnerships, Atlanta (A.A.); and ReiThera, Rome (E. Scarselli, A.F., S. Capone), and CEINGE, Naples (A.N.) - both in Italy
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Giménez-Roig J, Núñez-Manchón E, Alemany R, Villanueva E, Fillat C. Codon Usage and Adenovirus Fitness: Implications for Vaccine Development. Front Microbiol 2021; 12:633946. [PMID: 33643266 PMCID: PMC7902882 DOI: 10.3389/fmicb.2021.633946] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/20/2021] [Indexed: 02/03/2023] Open
Abstract
Vaccination is the most effective method to date to prevent viral diseases. It intends to mimic a naturally occurring infection while avoiding the disease, exposing our bodies to viral antigens to trigger an immune response that will protect us from future infections. Among different strategies for vaccine development, recombinant vaccines are one of the most efficient ones. Recombinant vaccines use safe viral vectors as vehicles and incorporate a transgenic antigen of the pathogen against which we intend to generate an immune response. These vaccines can be based on replication-deficient viruses or replication-competent viruses. While the most effective strategy involves replication-competent viruses, they must be attenuated to prevent any health hazard while guaranteeing a strong humoral and cellular immune response. Several attenuation strategies for adenoviral-based vaccine development have been contemplated over time. In this paper, we will review them and discuss novel approaches based on the principle that protein synthesis from individual genes can be modulated by codon usage bias manipulation. We will summarize vaccine approaches that consider recoding of viral proteins to produce adenoviral attenuation and recoding of the transgene antigens for both viral attenuation and efficient viral epitope expression.
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Affiliation(s)
- Judit Giménez-Roig
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Estela Núñez-Manchón
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Ramon Alemany
- Procure Program, Institut Català d’Oncologia- Oncobell Program, IDIBELL, L’Hospitalet de Llobregat, Barcelona, Spain
| | - Eneko Villanueva
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Cristina Fillat
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Barcelona, Spain
- Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona (UB), Barcelona, Spain
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Recent developments in vaccines strategies against human viral pathogens. RECENT DEVELOPMENTS IN APPLIED MICROBIOLOGY AND BIOCHEMISTRY 2021. [PMCID: PMC7564847 DOI: 10.1016/b978-0-12-821406-0.00001-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Recently, several viruses have emerged or reemerged from obscurity to become serious global health threats, raising alarm regarding their sustained epidemic transmission. One of the main public health concerns of these emerging viruses is their sustained circulation among populations of immunologically naïve, susceptible hosts. With every new viral emergence or reemergence, comes the call for rapid vaccine development and the induction of protective immunity through vaccination can be a powerful tool to prevent this concern by conferring protection to the population at risk. Vaccines are considered a critical component of disease prevention against emerging viral infections because, in many cases, other medical options are limited or nonexistent. While the classic approaches to vaccine development are still amenable to emerging viruses, the advent of latest technologies in molecular techniques has profoundly influenced our understanding of virus biology, and immune responses and vaccination methods based on replicating, attenuated, and nonreplicating virus vector approaches have become useful vaccine platforms. Together with a growing understanding in the biology of newly emerging virus diseases, a range of new vaccine strategies, vaccines against new and reemerging viruses may become a possibility.
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Buchbinder SP, McElrath MJ, Dieffenbach C, Corey L. Use of adenovirus type-5 vectored vaccines: a cautionary tale. Lancet 2020; 396:e68-e69. [PMID: 33091364 PMCID: PMC7571904 DOI: 10.1016/s0140-6736(20)32156-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 09/17/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Susan P Buchbinder
- Bridge HIV, San Francisco Department of Public Health, San Francisco, CA 94102, USA; Department of Medicine and Department of Epidemiology, University of California, San Francisco, CA, USA.
| | - M Juliana McElrath
- Fred Hutchinson Cancer Research Institute, Seattle, WA, USA; Fred Hutchinson Cancer Research Center, Vaccine and Infectious Disease Division, University of Washington, Seattle, WA, USA
| | - Carl Dieffenbach
- Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Lawrence Corey
- Fred Hutchinson Cancer Research Institute, Seattle, WA, USA; Fred Hutchinson Cancer Research Center, Vaccine and Infectious Disease Division, University of Washington, Seattle, WA, USA
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Goldstein N, Bockstal V, Bart S, Luhn K, Robinson C, Gaddah A, Callendret B, Douoguih M. Safety and Immunogenicity of Heterologous and Homologous Two Dose Regimens of Ad26- and MVA-Vectored Ebola Vaccines: A Randomized, Controlled Phase 1 Study. J Infect Dis 2020; 226:595-607. [PMID: 32939546 PMCID: PMC9441209 DOI: 10.1093/infdis/jiaa586] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 09/14/2020] [Indexed: 11/12/2022] Open
Abstract
Background This phase 1 placebo-controlled study assessed the safety and immunogenicity of 2-dose regimens of Ad26.ZEBOV (adenovirus serotype 26 [Ad26]) and MVA-BN-Filo (modified vaccinia Ankara [MVA]) vaccines with booster vaccination at day 360. Methods Healthy US adults (N = 164) randomized into 10 groups received saline placebo or standard or high doses of Ad26 or MVA in 2-dose regimens at 7-, 14-, 28-, or 56-day intervals; 8 groups received booster Ad26 or MVA vaccinations on day 360. Participants reported solicited and unsolicited reactogenicity; we measured immunoglobulin G binding, neutralizing antibodies and cellular immune responses to Ebola virus glycoprotein. Results All regimens were well tolerated with no serious vaccine-related adverse events. Heterologous (Ad26,MVA [dose 1, dose 2] or MVA,Ad26) and homologous (Ad26,Ad26) regimens induced humoral and cellular immune responses 21 days after dose 2; responses were higher after heterologous regimens. Booster vaccination elicited anamnestic responses in all participants. Conclusions Both heterologous and homologous Ad26,MVA Ebola vaccine regimens are well tolerated in healthy adults, regardless of interval or dose level. Heterologous 2-dose Ad26,MVA regimens containing an Ebola virus insert induce strong, durable humoral and cellular immune responses. Immunological memory was rapidly recalled by booster vaccination, suggesting that Ad26 booster doses could be considered for individuals at risk of Ebola infection, who previously received the 2-dose regimen.
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Affiliation(s)
- Neil Goldstein
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Viki Bockstal
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | | | - Kerstin Luhn
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Cynthia Robinson
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
| | - Auguste Gaddah
- Janssen Infectious Diseases and Vaccines, Beerse, Belgium
| | | | - Macaya Douoguih
- Janssen Infectious Diseases and Vaccines, Leiden, The Netherlands
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Kallas EG, Grunenberg NA, Yu C, Manso B, Pantaleo G, Casapia M, Baden LR, Valencia J, Sobieszczyk M, Van Tieu H, Allen M, Hural J, Graham BS, Kublin J, Gilbert PB, Corey L, Goepfert PA, McElrath MJ, Johnson RP, Huang Y, Frahm N. Antigenic competition in CD4 + T cell responses in a randomized, multicenter, double-blind clinical HIV vaccine trial. Sci Transl Med 2020; 11:11/519/eaaw1673. [PMID: 31748227 DOI: 10.1126/scitranslmed.aaw1673] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Accepted: 10/04/2019] [Indexed: 11/02/2022]
Abstract
T cell responses have been implicated in reduced risk of HIV acquisition in uninfected persons and control of viral replication in HIV-infected individuals. HIV Gag-specific T cells have been predominantly associated with post-infection control, whereas Env antigens are the target for protective antibodies; therefore, inclusion of both antigens is common in HIV vaccine design. However, inclusion of multiple antigens may provoke antigenic competition, reducing the potential effectiveness of the vaccine. HVTN 084 was a randomized, multicenter, double-blind phase 1 trial to investigate whether adding Env to a Gag/Pol vaccine decreases the magnitude or breadth of Gag/Pol-specific T cell responses. Fifty volunteers each received one intramuscular injection of 1 × 1010 particle units (PU) of rAd5 Gag/Pol and EnvA/B/C (3:1:1:1 mixture) or 5 × 109 PU of rAd5 Gag/Pol. CD4+ T cell responses to Gag/Pol measured 4 weeks after vaccination by cytokine expression were significantly higher in the group vaccinated without Env, whereas CD8+ T cell responses did not differ significantly between the two groups. Mapping of individual epitopes revealed greater breadth of the Gag/Pol-specific T cell response in the absence of Env compared to Env coimmunization. Addition of an Env component to a Gag/Pol vaccine led to reduced Gag/Pol CD4+ T cell response rate and magnitude as well as reduced epitope breadth, confirming the presence of antigenic competition. Therefore, T cell-based vaccine strategies should aim at choosing a minimalist set of antigens to reduce interference of individual vaccine components with the induction of the maximally achievable immune response.
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Affiliation(s)
- Esper G Kallas
- Division of Clinical Immunology and Allergy, University of São Paulo, São Paulo 05508, Brazil
| | - Nicole A Grunenberg
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Chenchen Yu
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Bryce Manso
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Giuseppe Pantaleo
- Division of Immunology and Allergy, Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | | | - Lindsey R Baden
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Javier Valencia
- Asociación Civil Impacta Salud Y Educación, Lima 15063, Peru
| | - Magdalena Sobieszczyk
- Division of Infectious Diseases, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10025, USA
| | - Hong Van Tieu
- Laboratory of Infectious Disease Prevention, New York Blood Center, New York, NY 10065, USA
| | - Mary Allen
- Division of AIDS, National Institute for Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - John Hural
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | | | - James Kublin
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Peter B Gilbert
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Lawrence Corey
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Paul A Goepfert
- Division of Infectious Disease and Department of Surgery, Division of Gastroenterology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - M Juliana McElrath
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.,Department of Global Health, University of Washington, Seattle, WA 98195, USA.,Department of Laboratory Medicine, University of Washington, Seattle, WA 98195, USA.,Department of Medicine, University of Washington, Seattle, WA 98195, USA
| | - R Paul Johnson
- Yerkes National Primate Research Center, School of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Yunda Huang
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Nicole Frahm
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. .,Department of Global Health, University of Washington, Seattle, WA 98195, USA
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Kochneva GV, Sivolobova GF, Tkacheva AV, Gorchakov AA, Kulemzin SV. Combination of Oncolytic Virotherapy and CAR T/NK Cell Therapy for the Treatment of Cancer. Mol Biol 2020; 54:3-16. [DOI: 10.1134/s0026893320010100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 03/19/2019] [Indexed: 12/28/2022]
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Affiliation(s)
| | - Jerome H. Kim
- International Vaccine Institute, Seoul, Republic of Korea
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Anywaine Z, Whitworth H, Kaleebu P, Praygod G, Shukarev G, Manno D, Kapiga S, Grosskurth H, Kalluvya S, Bockstal V, Anumendem D, Luhn K, Robinson C, Douoguih M, Watson-Jones D. Safety and Immunogenicity of a 2-Dose Heterologous Vaccination Regimen With Ad26.ZEBOV and MVA-BN-Filo Ebola Vaccines: 12-Month Data From a Phase 1 Randomized Clinical Trial in Uganda and Tanzania. J Infect Dis 2019; 220:46-56. [PMID: 30796818 PMCID: PMC6548900 DOI: 10.1093/infdis/jiz070] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 02/19/2019] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Ebola vaccine development was accelerated in response to the 2014 Ebola virus infection outbreak. This phase 1 study (VAC52150EBL1004) assessed safety, tolerability, and immunogenicity of heterologous 2-dose Ad26.ZEBOV, MVA-BN-Filo vaccination regimens in the Lake Victoria Basin of Tanzania and Uganda in mid-level altitude, malaria-endemic settings. METHODS Healthy volunteers aged 18-50 years from Tanzania (n = 25) and Uganda (n = 47) were randomized to receive placebo or active vaccination with Ad26.ZEBOV or MVA-BN-Filo (first vaccination), followed by MVA-BN-Filo or Ad26.ZEBOV (second vaccination) dose 2, respectively, with intervals of 28 or 56 days. RESULTS Seventy-two adults were randomized to receive vaccine (n = 60) or placebo (n = 12). No vaccine-related serious adverse events were reported. The most frequent solicited local and systemic adverse events were injection site pain (frequency, 70%, 66%, and 42% per dose for MVA-BN-Filo, Ad26.ZEBOV, and placebo, respectively) and headache (57%, 56%, and 46%, respectively). Adverse event patterns were similar among regimens. Twenty-one days after dose 2, 100% of volunteers demonstrated binding antibody responses against Ebola virus glycoprotein, and 87%-100% demonstrated neutralizing antibody responses. Ad26.ZEBOV dose 1 vaccination induced more-robust initial binding antibody and cellular responses than MVA-BN-Filo dose 1 vaccination. CONCLUSIONS Heterologous 2-dose vaccination with Ad26.ZEBOV and MVA-BN-Filo against Ebola virus is well tolerated and immunogenic in healthy volunteers. CLINICAL TRIALS REGISTRATION NCT02376400.
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Affiliation(s)
- Zacchaeus Anywaine
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Hilary Whitworth
- London School of Hygiene and Tropical Medicine, London, United Kingdom
- Mwanza Intervention Trials Unit, National Institute for Medical Research, Mwanza, Tanzania
| | - Pontiano Kaleebu
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - George Praygod
- Mwanza Research Center, National Institute for Medical Research, Mwanza, Tanzania
| | | | - Daniela Manno
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Saidi Kapiga
- London School of Hygiene and Tropical Medicine, London, United Kingdom
- Mwanza Intervention Trials Unit, National Institute for Medical Research, Mwanza, Tanzania
| | - Heiner Grosskurth
- London School of Hygiene and Tropical Medicine, London, United Kingdom
- Mwanza Intervention Trials Unit, National Institute for Medical Research, Mwanza, Tanzania
| | | | - Viki Bockstal
- Janssen Vaccines and Prevention, Leiden, the Netherlands
| | | | - Kerstin Luhn
- Janssen Vaccines and Prevention, Leiden, the Netherlands
| | | | | | - Deborah Watson-Jones
- London School of Hygiene and Tropical Medicine, London, United Kingdom
- Mwanza Intervention Trials Unit, National Institute for Medical Research, Mwanza, Tanzania
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Mutua G, Anzala O, Luhn K, Robinson C, Bockstal V, Anumendem D, Douoguih M. Safety and Immunogenicity of a 2-Dose Heterologous Vaccine Regimen With Ad26.ZEBOV and MVA-BN-Filo Ebola Vaccines: 12-Month Data From a Phase 1 Randomized Clinical Trial in Nairobi, Kenya. J Infect Dis 2019; 220:57-67. [PMID: 30796816 PMCID: PMC6548899 DOI: 10.1093/infdis/jiz071] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 02/20/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND During the 2014 West African Ebola outbreak, Ebola vaccine development was accelerated. The phase 1 VAC52150EBL1003 study was performed to investigate 2-dose heterologous vaccination with Ad26.ZEBOV and MVA-BN-Filo in an African population located in a high-altitude setting in Nairobi, Kenya. METHODS Healthy adult volunteers were randomized to receive one of four 2-dose vaccination schedules. The first vaccination was administered at baseline (Ad26.ZEBOV or MVA-BN-Filo), followed by the second vaccination with the alternate vaccine after either 28 or 56 days. Each schedule had a placebo comparator group. The primary objective was to assess the safety and tolerability of these regimens. RESULTS Seventy-two volunteers were randomized into 4 groups of 18 (15 received vaccine, and 3 received placebo). The most frequent solicited systemic adverse event was headache (frequency, 50%, 61%, and 42% per dose for MVA-BN-Filo, Ad26.ZEBOV, and placebo, respectively). The most frequent solicited local AE was injection site pain (frequency, 78%, 63%, and 33% per dose for MVA-BN-Filo, Ad26.ZEBOV, and placebo, respectively). No differences in adverse events were observed among the different vaccine regimens. High levels of binding and neutralizing anti-Ebola virus glycoprotein antibodies were induced by all regimens and sustained to day 360 after the first dose. CONCLUSIONS Two-dose heterologous vaccination with Ad26.ZEBOV and MVA-BN-Filo was well tolerated and highly immunogenic against Ebola virus glycoprotein. CLINICAL TRIALS REGISTRATION NCT02376426.
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Affiliation(s)
- Gaudensia Mutua
- Kenya AIDS Vaccine Initiative Institute of Clinical Research, College of Health Sciences, University of Nairobi, Kenya
| | - Omu Anzala
- Kenya AIDS Vaccine Initiative Institute of Clinical Research, College of Health Sciences, University of Nairobi, Kenya
| | - Kerstin Luhn
- Janssen Vaccines and Prevention, Leiden, the Netherlands
| | | | - Viki Bockstal
- Janssen Vaccines and Prevention, Leiden, the Netherlands
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Mennechet FJD, Paris O, Ouoba AR, Salazar Arenas S, Sirima SB, Takoudjou Dzomo GR, Diarra A, Traore IT, Kania D, Eichholz K, Weaver EA, Tuaillon E, Kremer EJ. A review of 65 years of human adenovirus seroprevalence. Expert Rev Vaccines 2019; 18:597-613. [PMID: 31132024 DOI: 10.1080/14760584.2019.1588113] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Introduction: Human adenovirus (HAdV)-derived vectors have been used in numerous pre-clinical and clinical trials during the last 40 years. Current research in HAdV-based vaccines focuses on improving transgene immunogenicity and safety. Because pre-existing humoral immunity against HAdV types correlate with reduced vaccine efficacy and safety, many groups are exploring the development of HAdV types vectors with lower seroprevalence. However, global seroepidemiological data are incomplete. Areas covered: The goal of this review is to centralize 65 years of research on (primarily) HAdV epidemiology. After briefly addressing adenovirus biology, we chronical HAdV seroprevalence studies and highlight major milestones. Finally, we analyze data from about 50 studies with respect to HAdVs types that are currently used in the clinic, or are in the developmental pipeline. Expert opinion: Vaccination is among the most efficient tools to prevent infectious disease. HAdV-based vaccines have undeniable potential, but optimization is needed and antivector immunity remains a challenge if the same vectors are to be administrated to different populations. Here, we identify gaps in our knowledge and the need for updated worldwide epidemiological data.
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Affiliation(s)
- Franck J D Mennechet
- a Institut de Génétique Moléculaire de Montpellier , University of Montpellier - CNRS , Montpellier , France
| | - Océane Paris
- a Institut de Génétique Moléculaire de Montpellier , University of Montpellier - CNRS , Montpellier , France
| | - Aline Raissa Ouoba
- a Institut de Génétique Moléculaire de Montpellier , University of Montpellier - CNRS , Montpellier , France.,b UMR 1058, Pathogenesis and Control of Chronic Infections , INSERM - University of Montpellier - Establishment Français du Sang - Centre Hospitalier Universitaire de Montpellier , Montpellier , France.,c Département des sciences et de la recherche clinique , Centre Muraz , Bobo-Dioulasso , Burkina Faso
| | - Sofia Salazar Arenas
- a Institut de Génétique Moléculaire de Montpellier , University of Montpellier - CNRS , Montpellier , France
| | - Sodiomon B Sirima
- d Centre National de Recherche et de Formation sur le Paludisme , Ouagadougou , Burkina Faso.,e Groupe de Recherche Action en Santé (GRAS) , Ouagadougou , Burkina Faso
| | - Guy R Takoudjou Dzomo
- f Complexe Hospitalo Universitaire « Le Bon Samaritain » , N'Djamena , Republic of Chad
| | - Amidou Diarra
- d Centre National de Recherche et de Formation sur le Paludisme , Ouagadougou , Burkina Faso
| | - Isidore T Traore
- c Département des sciences et de la recherche clinique , Centre Muraz , Bobo-Dioulasso , Burkina Faso
| | - Dramane Kania
- c Département des sciences et de la recherche clinique , Centre Muraz , Bobo-Dioulasso , Burkina Faso
| | - Karsten Eichholz
- a Institut de Génétique Moléculaire de Montpellier , University of Montpellier - CNRS , Montpellier , France
| | - Eric A Weaver
- g University of Nebraska-Lincoln, School of Biological Sciences , Lincoln , NE , USA
| | - Edouard Tuaillon
- b UMR 1058, Pathogenesis and Control of Chronic Infections , INSERM - University of Montpellier - Establishment Français du Sang - Centre Hospitalier Universitaire de Montpellier , Montpellier , France
| | - Eric J Kremer
- a Institut de Génétique Moléculaire de Montpellier , University of Montpellier - CNRS , Montpellier , France
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Safety and Immunogenicity of a Novel Recombinant Simian Adenovirus ChAdOx2 as a Vectored Vaccine. Vaccines (Basel) 2019; 7:vaccines7020040. [PMID: 31096710 PMCID: PMC6630572 DOI: 10.3390/vaccines7020040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/30/2019] [Accepted: 05/08/2019] [Indexed: 12/16/2022] Open
Abstract
Adenovirus vectored vaccines are a highly effective strategy to induce cellular immune responses which are particularly effective against intracellular pathogens. Recombinant simian adenovirus vectors were developed to circumvent the limitations imposed by the use of human adenoviruses due to widespread seroprevalence of neutralising antibodies. We have constructed a replication deficient simian adenovirus-vectored vaccine (ChAdOx2) expressing 4 genes from the Mycobacterium avium subspecies paratuberculosis (AhpC, Gsd, p12 and mpa). Safety and T-cell immunogenicity results of the first clinical use of the ChAdOx2 vector are presented here. The trial was conducted using a ‘three-plus-three’ dose escalation study design. We demonstrate the vaccine is safe, well tolerated and immunogenic.
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Mekonnen ZA, Grubor-Bauk B, Masavuli MG, Shrestha AC, Ranasinghe C, Bull RA, Lloyd AR, Gowans EJ, Wijesundara DK. Toward DNA-Based T-Cell Mediated Vaccines to Target HIV-1 and Hepatitis C Virus: Approaches to Elicit Localized Immunity for Protection. Front Cell Infect Microbiol 2019; 9:91. [PMID: 31001491 PMCID: PMC6456646 DOI: 10.3389/fcimb.2019.00091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 03/14/2019] [Indexed: 01/07/2023] Open
Abstract
Human immunodeficiency virus (HIV)-1 and hepatitis C virus (HCV) are major contributors to the global disease burden with many experts recognizing the requirement of an effective vaccine to bring a durable end to these viral epidemics. The most promising vaccine candidates that have advanced into pre-clinical models and the clinic to eliminate or provide protection against these chronic viruses are viral vectors [e.g., recombinant cytomegalovirus, Adenovirus, and modified vaccinia Ankara (MVA)]. This raises the question, is there a need to develop DNA vaccines against HIV-1 and HCV? Since the initial study from Wolff and colleagues which showed that DNA represents a vector that can be used to express transgenes durably in vivo, DNA has been regularly evaluated as a vaccine vector albeit with limited success in large animal models and humans. However, several recent studies in Phase I-IIb trials showed that vaccination of patients with recombinant DNA represents a feasible therapeutic intervention to even cure cervical cancer, highlighting the potential of using DNA for human vaccinations. In this review, we will discuss the limitations and the strategies of using DNA as a vector to develop prophylactic T cell-mediated vaccines against HIV-1 and HCV. In particular, we focus on potential strategies exploiting DNA vectors to elicit protective localized CD8+ T cell immunity in the liver for HCV and in the cervicovaginal mucosa for HIV-1 as localized immunity will be an important, if not critical component, of an efficacious vaccine against these viral infections.
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Affiliation(s)
- Zelalem A. Mekonnen
- Virology Laboratory, Basil Hetzel Institute for Translational Health Research, Discipline of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Branka Grubor-Bauk
- Virology Laboratory, Basil Hetzel Institute for Translational Health Research, Discipline of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Makutiro G. Masavuli
- Virology Laboratory, Basil Hetzel Institute for Translational Health Research, Discipline of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Ashish C. Shrestha
- Virology Laboratory, Basil Hetzel Institute for Translational Health Research, Discipline of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Charani Ranasinghe
- Molecular Mucosal Vaccine Immunology Group, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Rowena A. Bull
- Viral Immunology Systems Program, The Kirby Institute, The University of New South Wales, Sydney, NSW, Australia
| | - Andrew R. Lloyd
- Viral Immunology Systems Program, The Kirby Institute, The University of New South Wales, Sydney, NSW, Australia
| | - Eric J. Gowans
- Virology Laboratory, Basil Hetzel Institute for Translational Health Research, Discipline of Surgery, University of Adelaide, Adelaide, SA, Australia
| | - Danushka K. Wijesundara
- Virology Laboratory, Basil Hetzel Institute for Translational Health Research, Discipline of Surgery, University of Adelaide, Adelaide, SA, Australia,*Correspondence: Danushka K. Wijesundara
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Arsenović-Ranin N. New vaccines on the horizon. ARHIV ZA FARMACIJU 2019. [DOI: 10.5937/arhfarm1906385a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Guedan S, Alemany R. CAR-T Cells and Oncolytic Viruses: Joining Forces to Overcome the Solid Tumor Challenge. Front Immunol 2018; 9:2460. [PMID: 30405639 PMCID: PMC6207052 DOI: 10.3389/fimmu.2018.02460] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/04/2018] [Indexed: 12/28/2022] Open
Abstract
Adoptive transfer of chimeric antigen receptor (CAR)-modified T cells has resulted in unprecedented rates of long-lasting complete responses in patients with leukemia and lymphoma. However, despite the impressive results in patients with hematologic malignancies, CAR-T cells have showed limited effect against solid cancers. New approaches will need to simultaneously overcome the multiple challenges that CAR-T cells encounter in solid tumors, including the immunosuppressive tumor microenvironment and heterogeneity of antigen expression. Oncolytic viruses are lytic and immunogenic anti-cancer agents with the potential to synergize with CAR-T cells for the treatment of solid tumors. In addition, viruses can be further modified to deliver therapeutic transgenes selectively to the tumor microenvironment, which could enhance the effector functions of tumor-specific T cells. This review summarizes the major limitations of CAR-T cells in solid tumors and discusses the potential role for oncolytic viruses as partners for CAR-T cells in the fight against cancer.
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Affiliation(s)
- Sonia Guedan
- Department of Hematology and Oncology, Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Ramon Alemany
- ProCure Program, IDIBELL-Institut Catala d'Oncologia, L'Hospitalet de Llobregat, Spain
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Immunogenicity and Cross-Reactivity of Rhesus Adenoviral Vectors. J Virol 2018; 92:JVI.00159-18. [PMID: 29563285 PMCID: PMC5952169 DOI: 10.1128/jvi.00159-18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 03/12/2018] [Indexed: 01/23/2023] Open
Abstract
Adenovirus (Ad) vectors are being investigated as vaccine candidates, but baseline antivector immunity exists in human populations to both human Ad (HuAd) and chimpanzee Ad (ChAd) vectors. In this study, we investigated the immunogenicity and cross-reactivity of a panel of recently described rhesus adenoviral (RhAd) vectors. RhAd vectors elicited T cells with low exhaustion markers and robust anamnestic potential. Moreover, RhAd vector immunogenicity was unaffected by high levels of preexisting anti-HuAd immunity. Both HuAd/RhAd and RhAd/RhAd prime-boost vaccine regimens were highly immunogenic, despite a degree of cross-reactive neutralizing antibodies (NAbs) between phylogenetically related RhAd vectors. We observed extensive vector-specific cross-reactive CD4 T cell responses and more limited CD8 T cell responses between RhAd and HuAd vectors, but the impact of vector-specific cellular responses was far less than that of vector-specific NAbs. These data suggest the potential utility of RhAd vectors and define novel heterologous prime-boost strategies for vaccine development. IMPORTANCE To date, most adenoviral vectors developed for vaccination have been HuAds from species B, C, D, and E, and human populations display moderate to high levels of preexisting immunity. There is a clinical need for new adenoviral vectors that are not hindered by preexisting immunity. Moreover, the development of RhAd vector vaccines expands our ability to vaccinate against multiple pathogens in a population that may have received other HuAd or ChAd vectors. We evaluated the immunogenicity and cross-reactivity of RhAd vectors, which belong to the poorly described adenovirus species G. These vectors induced robust cellular and humoral immune responses and were not hampered by preexisting anti-HuAd vector immunity. Such properties make RhAd vectors attractive as potential vaccine vectors.
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Pusch E, Renz H, Skevaki C. Respiratory virus-induced heterologous immunity: Part of the problem or part of the solution? ALLERGO JOURNAL 2018; 27:28-45. [PMID: 32300267 PMCID: PMC7149200 DOI: 10.1007/s15007-018-1580-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 02/15/2018] [Indexed: 12/31/2022]
Abstract
Purpose To provide current knowledge on respiratory virus-induced heterologous immunity (HI) with a focus on humoral and cellular cross-reactivity. Adaptive heterologous immune responses have broad implications on infection, autoimmunity, allergy and transplant immunology. A better understanding of the mechanisms involved might ultimately open up possibilities for disease prevention, for example by vaccination. Methods A structured literature search was performed using Medline and PubMed to provide an overview of the current knowledge on respiratory-virus induced adaptive HI. Results In HI the immune response towards one antigen results in an alteration of the immune response towards a second antigen. We provide an overview of respiratory virus-induced HI, including viruses such as respiratory syncytial virus (RSV), rhinovirus (RV), coronavirus (CoV) and influenza virus (IV). We discuss T cell receptor (TCR) and humoral cross-reactivity as mechanisms of HI involving those respiratory viruses. Topics covered include HI between respiratory viruses as well as between respiratory viruses and other pathogens. Newly developed vaccines, which have the potential to provide protection against multiple virus strains are also discussed. Furthermore, respiratory viruses have been implicated in the development of autoimmune diseases, such as narcolepsy, Guillain-Barré syndrome, type 1 diabetes or myocarditis. Finally, we discuss the role of respiratory viruses in asthma and the hygiene hypothesis, and review our recent findings on HI between IV and allergens, which leads to protection from experimental asthma. Conclusion Respiratory-virus induced HI may have protective but also detrimental effects on the host. Respiratory viral infections contribute to asthma or autoimmune disease development, but on the other hand, a lack of microbial encounter is associated with an increasing number of allergic as well as autoimmune diseases. Future research might help identify the elements which determine a protective or detrimental outcome in HI-based mechanisms.
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Affiliation(s)
- Emanuel Pusch
- Institute of Laboratory Medicine, Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Harald Renz
- Institute of Laboratory Medicine, Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Chrysanthi Skevaki
- Institute of Laboratory Medicine, Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
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Pusch E, Renz H, Skevaki C. Respiratory virus-induced heterologous immunity: Part of the problem or part of the solution? ACTA ACUST UNITED AC 2018; 27:79-96. [PMID: 32226720 PMCID: PMC7100437 DOI: 10.1007/s40629-018-0056-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 02/15/2018] [Indexed: 12/13/2022]
Abstract
Purpose To provide current knowledge on respiratory virus-induced heterologous immunity (HI) with a focus on humoral and cellular cross-reactivity. Adaptive heterologous immune responses have broad implications on infection, autoimmunity, allergy and transplant immunology. A better understanding of the mechanisms involved might ultimately open up possibilities for disease prevention, for example by vaccination. Methods A structured literature search was performed using Medline and PubMed to provide an overview of the current knowledge on respiratory-virus induced adaptive HI. Results In HI the immune response towards one antigen results in an alteration of the immune response towards a second antigen. We provide an overview of respiratory virus-induced HI, including viruses such as respiratory syncytial virus (RSV), rhinovirus (RV), coronavirus (CoV) and influenza virus (IV). We discuss T cell receptor (TCR) and humoral cross-reactivity as mechanisms of HI involving those respiratory viruses. Topics covered include HI between respiratory viruses as well as between respiratory viruses and other pathogens. Newly developed vaccines which have the potential to provide protection against multiple virus strains are also discussed. Furthermore, respiratory viruses have been implicated in the development of autoimmune diseases, such as narcolepsy, Guillain–Barré syndrome, type 1 diabetes or myocarditis. Finally, we discuss the role of respiratory viruses in asthma and the hygiene hypothesis, and review our recent findings on HI between IV and allergens, which leads to protection from experimental asthma. Conclusion Respiratory-virus induced HI may have protective but also detrimental effects on the host. Respiratory viral infections contribute to asthma or autoimmune disease development, but on the other hand, a lack of microbial encounter is associated with an increasing number of allergic as well as autoimmune diseases. Future research might help identify the elements which determine a protective or detrimental outcome in HI-based mechanisms.
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Affiliation(s)
- Emanuel Pusch
- Institute of Laboratory Medicine and Pathobiochemistry, Member of the German Center for Lung Research (DZL), Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Harald Renz
- Institute of Laboratory Medicine and Pathobiochemistry, Member of the German Center for Lung Research (DZL), Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
| | - Chrysanthi Skevaki
- Institute of Laboratory Medicine and Pathobiochemistry, Member of the German Center for Lung Research (DZL), Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
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Lambe T, Bowyer G, Ewer KJ. A review of Phase I trials of Ebola virus vaccines: what can we learn from the race to develop novel vaccines? Philos Trans R Soc Lond B Biol Sci 2017; 372:rstb.2016.0295. [PMID: 28396468 PMCID: PMC5394635 DOI: 10.1098/rstb.2016.0295] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2016] [Indexed: 11/23/2022] Open
Abstract
Sporadic outbreaks of Ebola virus infection have been documented since the mid-Seventies and viral exposure can lead to lethal haemorrhagic fever with case fatalities as high as 90%. There is now a comprehensive body of data from both ongoing and completed clinical trials assessing various vaccine strategies, which were rapidly advanced through clinical trials in response to the 2013–2016 Ebola virus disease (EVD) public health emergency. Careful consideration of immunogenicity post vaccination is essential but has been somewhat stifled because of the wide array of immunological assays and outputs that have been used in the numerous clinical trials. We discuss here the different aspects of the immune assays currently used in the Phase I clinical trials for Ebola virus vaccines, and draw comparisons across the immune outputs where possible; various trials have examined both cellular and humoral immunity in European and African cohorts. Assessment of the safety data, the immunological outputs and the ease of field deployment for the various vaccine modalities will help both the scientific community and policy-makers prioritize and potentially license vaccine candidates. If this can be achieved, the next outbreak of Ebola virus, or other emerging pathogen, can be more readily contained and will not have such widespread and devastating consequences. This article is part of the themed issue ‘The 2013–2016 West African Ebola epidemic: data, decision-making and disease control’.
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Affiliation(s)
- Teresa Lambe
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Headington, Oxford OX3 7DQ, UK
| | - Georgina Bowyer
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Headington, Oxford OX3 7DQ, UK
| | - Katie J Ewer
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Headington, Oxford OX3 7DQ, UK
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Epitope-Specific Vaccination Limits Clonal Expansion of Heterologous Naive T Cells during Viral Challenge. Cell Rep 2017; 17:636-644. [PMID: 27732841 DOI: 10.1016/j.celrep.2016.09.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 06/21/2016] [Accepted: 09/06/2016] [Indexed: 11/20/2022] Open
Abstract
Despite robust secondary T cell expansion primed by vaccination, the impact on primary immune responses to heterotypic antigens remains undefined. Here we show that secondary expansion of epitope-specific memory CD8+ T cells primed by prior infection with recombinant pathogens limits the primary expansion of naive CD8+ T cells with specificity to new heterologous antigens, dampening protective immunity against subsequent pathogen challenge. The degree of naive T cell repression directly paralleled the magnitude of the recall response. Suppressed primary T cell priming reflects competition for antigen accessibility, since clonal expansion was not inhibited if the primary and secondary epitopes were expressed on different dendritic cells. Interestingly, robust recall responses did not impact antigen-specific NK cells, suggesting that adaptive and innate lymphocyte responses possess different activation requirements or occur in distinct anatomical locations. These findings have important implications in pathogen vaccination strategies that depend on the targeting of multiple T cell epitopes.
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A Minimum Epitope Overlap between Infections Strongly Narrows the Emerging T Cell Repertoire. Cell Rep 2017; 17:627-635. [PMID: 27732840 PMCID: PMC5081394 DOI: 10.1016/j.celrep.2016.09.072] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/19/2016] [Accepted: 09/23/2016] [Indexed: 01/12/2023] Open
Abstract
Many infections are caused by pathogens that are similar, but not identical, to previously encountered viruses, bacteria, or vaccines. In such re-infections, pathogens introduce known antigens, which are recognized by memory T cells and new antigens that activate naive T cells. How preexisting memory T cells impact the repertoire of T cells responding to new antigens is still largely unknown. We demonstrate that even a minimum epitope overlap between infections strongly increases the activation threshold and narrows the diversity of T cells recruited in response to new antigens. Thus, minimal cross-reactivity between infections can significantly impact the outcome of a subsequent immune response. Interestingly, we found that non-transferrable memory T cells are most effective in raising the activation threshold. Our findings have implications for designing vaccines and suggest that vaccines meant to target low-affinity T cells are less effective when they contain a strong CD8 T cell epitope that has previously been encountered.
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Vitelli A, Folgori A, Scarselli E, Colloca S, Capone S, Nicosia A. Chimpanzee adenoviral vectors as vaccines - challenges to move the technology into the fast lane. Expert Rev Vaccines 2017; 16:1241-1252. [PMID: 29047309 DOI: 10.1080/14760584.2017.1394842] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
INTRODUCTION In recent years, replication-defective chimpanzee-derived adenoviruses have been extensively evaluated as genetic vaccines. These vectors share desirable properties with human adenoviruses like the broad tissue tropism and the ease of large-scale manufacturing. Additionally, chimpanzee adenoviruses have the advantage to overcome the negative impact of pre-existing anti-human adenovirus immunity. Areas covered: Here the authors review current pre-clinical research and clinical trials that utilize chimpanzee-derived adenoviral vectors as vaccines. A wealth of studies are ongoing to evaluate different vector backbones and administration routes with the aim of improving immune responses. The challenges associated with the identification of an optimal chimpanzee vector and immunization strategies for different immunological outcomes will be discussed. Expert commentary: The demonstration that chimpanzee adenoviruses can be safely used in humans has paved the way to the use of a whole new array of vectors of different serotypes. However, so far no predictive signature of vector immunity in humans has been identified. The high magnitude of T cell responses elicited by chimpanzee adenoviruses has allowed dissecting the qualitative aspects that may be important for protective immunity. Ultimately, only the results from the most clinically advanced products will help establish the efficacy of the vaccine vector platform in the field of disease prevention.
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Affiliation(s)
| | | | | | | | | | - Alfredo Nicosia
- a ReiThera , Rome , Italy.,c CEINGE , Naples , Italy.,d Department of Molecular Medicine and Medical Biotechnology , University of Naples Federico II , Naples , Italy
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Decreased Vector Gene Expression from E2b Gene-Deleted Adenovirus Serotype 5 Vaccines Intensifies Proinflammatory Immune Responses. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2017; 24:CVI.00061-17. [PMID: 28381403 DOI: 10.1128/cvi.00061-17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 03/20/2017] [Indexed: 02/06/2023]
Abstract
Recombinant adenovirus serotype 5 (Ad5) vectors are promising vaccine candidates due to their intrinsic immunogenicity and potent transgene expression; however, widespread preexisting Ad5 immunity has been considered a developmental impediment to the use of traditional, or conventional, E1 and E3 gene-deleted Ad5 (Ad5[E1-]) vaccines. Even in the presence of anti-Ad5 immunity, recent murine and human studies have confirmed E2b gene-deleted Ad5 (Ad5[E1-,E2b-]) vaccines to be highly efficacious inducers of transgene-specific memory responses and significantly less toxic options than Ad5[E1-] vaccines. While these findings have been substantially confirmed, the molecular mechanisms underlying the different reactions to these vaccine platforms are unknown. Using cultures of human peripheral blood mononuclear cells (hPBMCs) derived from multiple human donors, we found that Ad5[E1-,E2b-] vaccines trigger higher levels of hPBMC proinflammatory cytokine secretion than Ad5[E1-] vaccines. Interestingly, these responses were generated regardless of the donors' preexisting anti-Ad5 humoral and cell-mediated immune response status. In vitro hPBMC infection with the Ad5[E1-,E2b-] vaccine also provoked greater Th1-dominant gene responses yet smaller amounts of Ad-derived gene expression than Ad5[E1-] vaccines. These results suggest that Ad5[E1-,E2b-] vaccines, in contrast to Ad5[E1-] vaccines, do not promote activities that suppress innate immune signaling, thereby allowing for improved vaccine efficacy and a superior safety profile independently of previous Ad5 immunity.
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Regulatory T-Cell Activity But Not Conventional HIV-Specific T-Cell Responses Are Associated With Protection From HIV-1 Infection. J Acquir Immune Defic Syndr 2017; 72:119-28. [PMID: 26656786 DOI: 10.1097/qai.0000000000000919] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Two distinct hypotheses have been proposed for T-cell involvement in protection from HIV-1 acquisition. First, HIV-1-specific memory T-cell responses generated on HIV-1 exposure could mount an efficient response to HIV-1 and inhibit the establishment of an infection. Second, a lower level of immune activation could reduce the numbers of activated, HIV-1-susceptible CD4 T cells, thereby diminishing the likelihood of infection. METHODS To test these hypotheses, we conducted a prospective study among high-risk heterosexual men and women, and tested peripheral blood samples from individuals who subsequently acquired HIV-1 during follow-up (cases) and from a subset of those who remained HIV-1 uninfected (controls). RESULTS We found no difference in HIV-1-specific immune responses between cases and controls, but Treg frequency was higher in controls as compared with cases and was negatively associated with frequency of effector memory CD4 T cells. CONCLUSIONS Our findings support the hypothesis that low immune activation assists in protection from HIV-1 infection.
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Janes HE, Cohen KW, Frahm N, De Rosa SC, Sanchez B, Hural J, Magaret CA, Karuna S, Bentley C, Gottardo R, Finak G, Grove D, Shen M, Graham BS, Koup RA, Mulligan MJ, Koblin B, Buchbinder SP, Keefer MC, Adams E, Anude C, Corey L, Sobieszczyk M, Hammer SM, Gilbert PB, McElrath MJ. Higher T-Cell Responses Induced by DNA/rAd5 HIV-1 Preventive Vaccine Are Associated With Lower HIV-1 Infection Risk in an Efficacy Trial. J Infect Dis 2017; 215:1376-1385. [PMID: 28199679 PMCID: PMC5853653 DOI: 10.1093/infdis/jix086] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 02/08/2017] [Indexed: 12/15/2022] Open
Abstract
Background It is important to identify vaccine-induced immune responses that predict the preventative efficacy of a human immunodeficiency virus (HIV)-1 vaccine. We assessed T-cell response markers as correlates of risk in the HIV Vaccine Trials Network (HVTN) 505 HIV-1 vaccine efficacy trial. Methods 2504 participants were randomized to DNA/rAd5 vaccine or placebo, administered at weeks 0, 4, 8, and 24. Peripheral blood mononuclear cells were obtained at week 26 from all 25 primary endpoint vaccine cases and 125 matched vaccine controls, and stimulated with vaccine-insert-matched peptides. Primary variables were total HIV-1-specific CD4+ T-cell magnitude and Env-specific CD4+ polyfunctionality. Four secondary variables were also assessed. Immune responses were evaluated as predictors of HIV-1 infection among vaccinees using Cox proportional hazards models. Machine learning analyses identified immune response combinations best predicting HIV-1 infection. Results We observed an unexpectedly strong inverse correlation between Env-specific CD8+ immune response magnitude and HIV-1 infection risk (hazard ratio [HR] = 0.18 per SD increment; P = .04) and between Env-specific CD8+ polyfunctionality and infection risk (HR = 0.34 per SD increment; P < .01). Conclusions Further research is needed to determine if these immune responses are predictors of vaccine efficacy or markers of natural resistance to HIV-1 infection.
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Affiliation(s)
- Holly E Janes
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Kristen W Cohen
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Nicole Frahm
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Stephen C De Rosa
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Brittany Sanchez
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - John Hural
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Craig A Magaret
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Shelly Karuna
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Carter Bentley
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Greg Finak
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Douglas Grove
- The Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Mingchao Shen
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Barney S Graham
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Richard A Koup
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | | | - Beryl Koblin
- Laboratory of Infectious Disease Prevention, New York Blood Center, New York
| | - Susan P Buchbinder
- Departments of Medicine and Epidemiology/Biostatistics, University of California San Francisco
| | - Michael C Keefer
- University of Rochester Medical Center, School of Medicine and Dentistry, New York
| | - Elizabeth Adams
- Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, and
| | - Chuka Anude
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, Maryland; and
| | - Lawrence Corey
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - Magdalena Sobieszczyk
- Division of Infectious Diseases, Columbia University College of Physicians and Surgeons, New York
| | - Scott M Hammer
- Division of Infectious Diseases, Columbia University College of Physicians and Surgeons, New York
| | - Peter B Gilbert
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
| | - M Juliana McElrath
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, and
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Fajardo CA, Guedan S, Rojas LA, Moreno R, Arias-Badia M, de Sostoa J, June CH, Alemany R. Oncolytic Adenoviral Delivery of an EGFR-Targeting T-cell Engager Improves Antitumor Efficacy. Cancer Res 2017; 77:2052-2063. [PMID: 28143835 DOI: 10.1158/0008-5472.can-16-1708] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 01/11/2017] [Accepted: 01/24/2017] [Indexed: 11/16/2022]
Abstract
Antiviral immune responses present a major hurdle to the efficacious use of oncolytic adenoviruses as cancer treatments. Despite the existence of a highly immunosuppressive tumor environment, adenovirus-infected cells can nonetheless be efficiently cleared by infiltrating cytotoxic T lymphocytes (CTL) without compromising tumor burden. In this study, we tested the hypothesis that tumor-infiltrating T cells could be more effectively activated and redirected by oncolytic adenoviruses that were armed with bispecific T-cell-engager (BiTE) antibodies. The oncolytic adenovirus ICOVIR-15K was engineered to express an EGFR-targeting BiTE (cBiTE) antibody under the control of the major late promoter, leading to generation of ICOVIR-15K-cBiTE, which retained its oncolytic properties in vitro cBiTE expression and secretion was detected in supernatants from ICOVIR-15K-cBiTE-infected cells, and the secreted BiTEs bound specifically to both CD3+ and EGFR+ cells. In cell coculture assays, ICOVIR-15K-cBiTE-mediated oncolysis resulted in robust T-cell activation, proliferation, and bystander cell-mediated cytotoxicity. Notably, intratumoral injection of this cBiTE-expressing adenovirus increased the persistence and accumulation of tumor-infiltrating T cells in vivo, compared with the parental virus lacking such effects. Moreover, in two distinct tumor xenograft models, combined delivery of ICOVIR-15K-cBiTE with peripheral blood mononuclear cells or T cells enhanced the antitumor efficacy achieved by the parental counterpart. Overall, our results show how arming oncolytic adenoviruses with BiTE can overcome key limitations in oncolytic virotherapy. Cancer Res; 77(8); 2052-63. ©2017 AACR.
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Affiliation(s)
| | - Sonia Guedan
- Abramson Cancer Center and the Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Luis Alfonso Rojas
- ProCure Program, IDIBELL-Institut Català d'Oncologia, L'Hospitalet de Llobregat, Spain
| | - Rafael Moreno
- ProCure Program, IDIBELL-Institut Català d'Oncologia, L'Hospitalet de Llobregat, Spain
| | - Marcel Arias-Badia
- ProCure Program, IDIBELL-Institut Català d'Oncologia, L'Hospitalet de Llobregat, Spain
| | - Jana de Sostoa
- ProCure Program, IDIBELL-Institut Català d'Oncologia, L'Hospitalet de Llobregat, Spain
| | - Carl H June
- Abramson Cancer Center and the Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ramon Alemany
- ProCure Program, IDIBELL-Institut Català d'Oncologia, L'Hospitalet de Llobregat, Spain.
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Abstract
INTRODUCTION Despite many recent advances in the HIV prevention landscape, an effective vaccine remains the most promising tool to end the HIV-1 pandemic. Areas covered: This review summarizes past HIV vaccine efficacy trials and current vaccine strategies as well as new approaches about to move into first-in-human trials. Expert opinion: Despite many setbacks in early HIV vaccine efficacy trials, the success of RV144 has provided the glimmer of hope necessary to invigorate the vaccine field, and has led to the development of a large number of vaccine strategies aiming at inducing an array of different immune responses. The follow-up pox-protein trials, developed to replicate and enhance the polyfunctional antibody responses induced by the RV144 regimen, are already reaching efficacy trials, while a large body of work providing a more complete understanding of the development of broadly neutralizing antibodies is now being translated into immunogen design using several different strategies. T-cell based vaccines, fallen out of favor after Ad5-based trials showed increased infection rates in Ad5 seropositive vaccine recipients, are experiencing a comeback based in part on the promising results from non-human primate challenge studies using rhCMV-based immunogens. This diverse array of vaccine candidates may finally allow us to identify a broadly effective HIV vaccine able to contain the epidemic.
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Affiliation(s)
- Kristen W Cohen
- a Vaccine and Infectious Disease Division , Fred Hutchinson Cancer Research Center , Seattle , WA , USA
| | - Nicole Frahm
- a Vaccine and Infectious Disease Division , Fred Hutchinson Cancer Research Center , Seattle , WA , USA.,b Department of Global Health , University of Washington , Seattle , WA , USA
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