1
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Adeleke RA, Sahler J, Choi A, Roth K, Upadhye V, Ezzatpour S, Imbiakha B, Khomandiak S, Diaz A, Whittaker GR, Jager MC, August A, Buchholz DW, Aguilar HC. Replication-incompetent VSV-based vaccine elicits protective responses against SARS-CoV-2 and influenza virus. SCIENCE ADVANCES 2025; 11:eadq4545. [PMID: 39879304 PMCID: PMC11777205 DOI: 10.1126/sciadv.adq4545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 12/30/2024] [Indexed: 01/31/2025]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and influenza viruses lead to severe respiratory illnesses and death in humans, exacerbated in individuals with underlying health conditions, remaining substantial global public health concerns. Here, we developed a bivalent replication-incompetent single-cycle pseudotyped vesicular stomatitis virus vaccine that incorporates both a prefusion-stabilized SARS-CoV-2 spike protein lacking a furin cleavage site and a full-length influenza A virus neuraminidase protein. Vaccination of K18-hACE2 or C57BL/6J mouse models generated durable levels of neutralizing antibodies, T cell responses, and protection from morbidity and mortality upon challenge with either virus. Furthermore, the vaccine provided heterologous protection upon challenge with a different influenza virus strain, supporting the advantage of using NA to increase the breadth of vaccine protection. Now, no bivalent vaccine is approved for use against both SARS-CoV-2 and influenza virus. Our study supports using this platform to develop safe and efficient vaccines against multiple viruses.
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Affiliation(s)
- Richard A. Adeleke
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Julie Sahler
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Annette Choi
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Kyle Roth
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Viraj Upadhye
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Shahrzad Ezzatpour
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Brian Imbiakha
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Solomiia Khomandiak
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Annika Diaz
- Department of Population Medicine and Diagnostic Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Gary R. Whittaker
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Mason C. Jager
- Department of Population Medicine and Diagnostic Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Avery August
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - David W. Buchholz
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
| | - Hector C. Aguilar
- Department of Microbiology and Immunology, Cornell University College of Veterinary Medicine, Ithaca, NY 14853, USA
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2
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Mendoza-Ramírez NJ, García-Cordero J, Hernández-Galicia G, Moreno-Licona NJ, Hernandez J, Cabello-Gutierrez C, Zúñiga-Ramos JA, Morales-Rios E, Pérez-Tapia SM, Ortiz-Navarrete V, Espinosa-Cantellano M, Fernández-Benavides DA, Cedillo-Barrón L. Vaccination with Plasmids Encoding the Fusion Proteins D-S1, D-S1N and O-SN from SARS-CoV-2 Induces an Effective Humoral and Cellular Immune Response in Mice. Vaccines (Basel) 2025; 13:134. [PMID: 40006682 PMCID: PMC11860763 DOI: 10.3390/vaccines13020134] [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: 12/10/2024] [Revised: 01/08/2025] [Accepted: 01/22/2025] [Indexed: 02/27/2025] Open
Abstract
BACKGROUND Next-generation vaccines against coronavirus disease 2019 (COVID-19) focus on inducing a long-lasting immune response against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and its emerging variants. To achieve this, antigens other than spike proteins have been proposed, and different platforms have been evaluated. Nucleic acid-based vaccines are fundamental for this process. Preclinical data have shown that the SARS-CoV-2 nucleocapsid protein induces a protective cellular immune response, and when combined with the spike protein, the resulting humoral and cellular immune responses are effective against some SARS-CoV-2 variants. METHODS We designed a DNA vaccine against the spike and nucleocapsid proteins of SARS-CoV-2 to generate fusion proteins based on the Delta and Omicron B.5 strains. The most immunogenic regions of the spike and nucleocapsid proteins of the Delta and Omicron B strains were selected using bioinformatics. The nucleotide sequences were cloned into pcDNA3.1, and named pcDNA3.1/D-S1, pcDNA3.1/D-S1N, and pcDNA3.1/O-SN. The immunogenicity of the generated fusion proteins was evaluated by analyzing the humoral and cellular responses elicited after the immunization of BALB/c mice. RESULTS DNA immunization induced antibody production, neutralization activity, and IFN-γ production. The inclusion of the nucleocapsid regions in the plasmid greatly enhanced the immune response. Moreover, cross-reactions with the variants of interest were confirmed. CONCLUSIONS Plasmids-encoding fusion proteins combining the most immunogenic regions of the spike and nucleocapsid proteins present a promising strategy for designing new and effective vaccines against SARS-CoV-2.
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Affiliation(s)
- Noe Juvenal Mendoza-Ramírez
- Departamento de Biomedicina Molecular CINVESTAV, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-R.); (J.G.-C.); (G.H.-G.)
| | - Julio García-Cordero
- Departamento de Biomedicina Molecular CINVESTAV, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-R.); (J.G.-C.); (G.H.-G.)
| | - Gabriela Hernández-Galicia
- Departamento de Biomedicina Molecular CINVESTAV, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-R.); (J.G.-C.); (G.H.-G.)
| | - Nicole Justine Moreno-Licona
- Departamento de Bioquímica Cinvestav, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-L.); (E.M.-R.)
| | - Jesus Hernandez
- Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo A. C (CIAD) Carretera a la Victoria km 0.6, Hermosillo Sonora 83304, Mexico
| | - Carlos Cabello-Gutierrez
- Departamento de Investigación en Virología y Micología, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Calzada de Tlalpan 4502, Belisario Domínguez, Tlalpan 14080, Mexico; (C.C.-G.); (J.A.Z.-R.)
| | - Joaquín Alejandro Zúñiga-Ramos
- Departamento de Investigación en Virología y Micología, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Calzada de Tlalpan 4502, Belisario Domínguez, Tlalpan 14080, Mexico; (C.C.-G.); (J.A.Z.-R.)
- Escuela de Medicina y Ciencias de la Salud, Tecnológico de Monterrey, Monterrey 64710, Mexico
| | - Edgar Morales-Rios
- Departamento de Bioquímica Cinvestav, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-L.); (E.M.-R.)
| | - Sonia Mayra Pérez-Tapia
- Unidad de Desarrollo e Investigación en Bioterapéuticos (UDIBI), Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México City 11340, Mexico;
| | - Vianney Ortiz-Navarrete
- Departamento de Biomedicina Molecular CINVESTAV, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-R.); (J.G.-C.); (G.H.-G.)
| | - Martha Espinosa-Cantellano
- Departamento de Infectómica y Patogénesis Molecular, CINVESTAV, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico;
| | - David Andrés Fernández-Benavides
- Centro de Ingeniería y Desarrollo Industrial (CIDESI), Av. Playa Pie de la Cuesta No. 702, Desarrollo San Pablo, Querétaro 76125, Mexico;
| | - Leticia Cedillo-Barrón
- Departamento de Biomedicina Molecular CINVESTAV, Av. IPN # 2508 Col, San Pedro Zacatenco 07360, Mexico; (N.J.M.-R.); (J.G.-C.); (G.H.-G.)
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3
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Adelusi TI, Ogunlana AT, Oyewole MP, Ojo TO, Olaoba OT, Oladipo EK, Akash S, Ibenmoussa S, Bourhia M, Jardan YAB, Sitotaw B. Designing of an innovative conserved multiepitope subunit vaccine targeting SARS-CoV-2 glycoprotein and nucleoprotein through immunoinformatic. Sci Rep 2025; 15:2563. [PMID: 39833186 PMCID: PMC11747174 DOI: 10.1038/s41598-024-72495-9] [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: 11/23/2023] [Accepted: 09/09/2024] [Indexed: 01/22/2025] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has imposed substantial challenges on our society due to the COVID-19 pandemic. This virus relies heavily on its surface glycoprotein (S-glycoprotein) to facilitate attachment, fusion, and entry into host cells. While the nucleoprotein (N) in the ribonucleoprotein core binds to the viral RNA genome. Therefore, our objective is to develop a novel vaccine candidate targeting the dominant T-cell and B-cell epitopes of the immune system. On the S-glycoprotein and nucleoprotein. Employing an immunoinformatic approach, we constructed a vaccine candidate with 13 highly antigenic B-cell epitopes, 19 HTL antigenic epitopes, and 18 CTL epitopes following a rigorous assessment. The multi-epitope construct successfully passed three-fold toxicity, allergenicity, and antigenicity tests, affirming its non-toxic, non-allergenic, and antigenic nature. This demonstrates the potentiality of the vaccine design to trigger an immunological response. Furthermore, the vaccine-ACE-2 receptor complex was tested, confirming its ability to interact with ACE-2's core pocket and induce an immunological response. Additionally, the vaccine's binding prowess for human toll-like receptors (TLR) (1, 3, 4, and 8) was investigated. According to the Ramachandran plot, 77.46% of the construct's amino acid residues fall within a favorable zone, establishing it as a viable vaccine candidate.
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Affiliation(s)
- Temitope Isaac Adelusi
- Computational Biology and Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria.
- Department of Surgery, School of Medicine, University of Connecticut Health, Farmington Ave, Connecticut, 06030, United States of America.
- Genomics Unit, Helix Biogen Institute, Ogbomoso, Oyo State, Nigeria.
| | - Abdeen Tunde Ogunlana
- Computational Biology and Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
| | - Moyosoluwa Precious Oyewole
- Computational Biology and Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
| | - Taiwo Ooreoluwa Ojo
- Computational Biology and Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
- Genomics Unit, Helix Biogen Institute, Ogbomoso, Oyo State, Nigeria
| | - Olamide Tosin Olaoba
- Department of Surgery, School of Medicine, University of Connecticut Health, Farmington Ave, Connecticut, 06030, United States of America
| | - Elijah Kolawole Oladipo
- Genomics Unit, Helix Biogen Institute, Ogbomoso, Oyo State, Nigeria
- Department of Microbiology, Laboratory of Molecular Biology, Immunology and Bioinformatics, Adeleke University, Osun State, Nigeria
| | - Shopnil Akash
- Computational Biology Research Laboratory, Department of Pharmacy, Daffodil International University, Dhaka, Bangladesh
| | - Samir Ibenmoussa
- Laboratory of Therapeutic and Organic Chemistry, Faculty of Pharmacy, University of Montpellier, 34000, Montpellier, France
| | - Mohammed Bourhia
- Laboratory of Biotechnology and Natural Resources Valorization, Faculty of Sciences, Ibn Zohr University, 80060, Agadir, Morocco
| | - Yousef A Bin Jardan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 11451, Riyadh, Saudi Arabia
| | - Baye Sitotaw
- Department of Biology, Bahir Dar University, P.O.Box 79, Bahir Dar, Ethiopia.
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4
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Hurst JR, Naghibosadat M, Budowski P, Liu J, Samaan P, Budiman F, Kurtesi A, Qi F, Menon H, Krishnan R, Abioye J, Gingras AC, Ostrowski M, Orozco NM, Kozak RA. Comparison of a SARS-CoV-2 mRNA booster immunization containing additional antigens to a spike-based mRNA vaccine against Omicron BA.5 infection in hACE2 mice. PLoS One 2024; 19:e0314061. [PMID: 39625929 PMCID: PMC11614295 DOI: 10.1371/journal.pone.0314061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Accepted: 11/04/2024] [Indexed: 12/06/2024] Open
Abstract
The emergence of SARS-CoV-2 variants presents challenges to vaccine effectiveness, underlining the necessity for next-generation vaccines with multiple antigens beyond the spike protein. Here, we investigated a multiantigenic booster containing spike and a chimeric construct composed of nucleoprotein (N) and membrane (M) proteins, comparing its efficacy to a spike-only booster against Omicron BA.5 in K18-hACE2 mice. Initially, mice were primed and boosted with Beta (B.1.351) spike-only mRNA, showing strong spike-specific T cell responses and neutralizing antibodies, albeit with limited cross-neutralization to Omicron variants. Subsequently, a spike-NM multiantigenic vaccine was then examined as a second booster dose for protection in hACE2-transgenic mice. Mice receiving either homologous spike-only or heterologous spike-NM booster had nearly complete inhibition of infectious virus shedding in oral swabs and reduced viral burdens in both lung and nasal tissues following BA.5 challenge. Examination of lung pathology further revealed that both spike-only and spike-NM boosters provided comparable protection against inflammatory infiltrates and fibrosis. Moreover, the spike-NM booster demonstrated neutralization efficacy in a pseudovirus assay against Wuhan-Hu-1, Beta, and Omicron variants akin to the spike-only booster. These findings indicate that supplementing spike with additional SARS-CoV-2 targets in a booster immunization confers equivalent immunity and protection against Omicron BA.5. This work highlights a promising strategy for individuals previously vaccinated with spike-only vaccines, potentially offering enhanced protection against emerging coronaviruses.
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Affiliation(s)
- Jacklyn R. Hurst
- Biological Sciences Platform, Sunnybrook Research Institute at Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Maedeh Naghibosadat
- Biological Sciences Platform, Sunnybrook Research Institute at Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Patrick Budowski
- Institute of Medical Sciences, University of Toronto, Ontario, Canada
| | - Jun Liu
- Providence Therapeutics Holdings, Inc., Calgary, AB, Canada
| | - Philip Samaan
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Ontario, Canada
| | - Frans Budiman
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Alexandra Kurtesi
- Lunenfeld-Tanenbaum Research Institute at Mount Sinai Hospital, Sinai Health System, Toronto, ON, Canada
| | - Fredo Qi
- Lunenfeld-Tanenbaum Research Institute at Mount Sinai Hospital, Sinai Health System, Toronto, ON, Canada
| | - Haritha Menon
- Providence Therapeutics Holdings, Inc., Calgary, AB, Canada
| | | | - Jumai Abioye
- Providence Therapeutics Holdings, Inc., Calgary, AB, Canada
| | - Anne-Claude Gingras
- Lunenfeld-Tanenbaum Research Institute at Mount Sinai Hospital, Sinai Health System, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Mario Ostrowski
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | | | - Robert A. Kozak
- Biological Sciences Platform, Sunnybrook Research Institute at Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Ontario, Canada
- Division of Microbiology, Sunnybrook Health Sciences Centre, Department of Laboratory Medicine and Molecular Diagnostics, Toronto, ON, Canada
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5
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Henríquez R, Muñoz-Barroso I. Viral vector- and virus-like particle-based vaccines against infectious diseases: A minireview. Heliyon 2024; 10:e34927. [PMID: 39144987 PMCID: PMC11320483 DOI: 10.1016/j.heliyon.2024.e34927] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 06/28/2024] [Accepted: 07/18/2024] [Indexed: 08/16/2024] Open
Abstract
To overcome the limitations of conventional vaccines, new platforms for vaccine design have emerged such as those based on viral vectors and virus-like particles (VLPs). Viral vector vaccines are highly efficient and the onset of protection is quick. Many recombinant vaccine candidates for humans are based on viruses belonging to different families such as Adenoviridae, Retroviridae, Paramyxoviridae, Rhabdoviridae, and Parvoviridae. Also, the first viral vector vaccine licensed for human vaccination was the Japanese encephalitis virus vaccine. Since then, several viral vectors have been approved for vaccination against the viruses of Lassa fever, Ebola, hepatitis B, hepatitis E, SARS-CoV-2, and malaria. VLPs are nanoparticles that mimic viral particles formed from the self-assembly of structural proteins and VLP-based vaccines against hepatitis B and E viruses, human papillomavirus, and malaria have been commercialized. As evidenced by the accelerated production of vaccines against COVID-19, these new approaches are important tools for vaccinology and for generating rapid responses against pathogens and emerging pandemic threats.
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Affiliation(s)
- Ruth Henríquez
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Edificio Departamental Lab.106. Plaza Doctores de la Reina S/n, 37007, Salamanca, Spain
| | - Isabel Muñoz-Barroso
- Departamento de Bioquímica y Biología Molecular, Universidad de Salamanca, Edificio Departamental Lab.106. Plaza Doctores de la Reina S/n, 37007, Salamanca, Spain
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6
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Mendoza-Ramírez NJ, García-Cordero J, Shrivastava G, Cedillo-Barrón L. The Key to Increase Immunogenicity of Next-Generation COVID-19 Vaccines Lies in the Inclusion of the SARS-CoV-2 Nucleocapsid Protein. J Immunol Res 2024; 2024:9313267. [PMID: 38939745 PMCID: PMC11208798 DOI: 10.1155/2024/9313267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 05/06/2024] [Accepted: 05/09/2024] [Indexed: 06/29/2024] Open
Abstract
Vaccination is one of the most effective prophylactic public health interventions for the prevention of infectious diseases such as coronavirus disease (COVID-19). Considering the ongoing need for new COVID-19 vaccines, it is crucial to modify our approach and incorporate more conserved regions of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to effectively address emerging viral variants. The nucleocapsid protein is a structural protein of SARS-CoV-2 that is involved in replication and immune responses. Furthermore, this protein offers significant advantages owing to the minimal accumulation of mutations over time and the inclusion of key T-cell epitopes critical for SARS-CoV-2 immunity. A novel strategy that may be suitable for the new generation of vaccines against COVID-19 is to use a combination of antigens, including the spike and nucleocapsid proteins, to elicit robust humoral and potent cellular immune responses, along with long-lasting immunity. The strategic use of multiple antigens aims to enhance vaccine efficacy and broaden protection against viruses, including their variants. The immune response against the nucleocapsid protein from other coronavirus is long-lasting, and it can persist up to 11 years post-infection. Thus, the incorporation of nucleocapsids (N) into vaccine design adds an important dimension to vaccination efforts and holds promise for bolstering the ability to combat COVID-19 effectively. In this review, we summarize the preclinical studies that evaluated the use of the nucleocapsid protein as antigen. This study discusses the use of nucleocapsid alone and its combination with spike protein or other proteins of SARS-CoV-2.
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Affiliation(s)
- Noe Juvenal Mendoza-Ramírez
- Departamento de Biomedicina MolecularCINVESTAV IPN, Av. IPN # 2508 Col, San Pedro Zacatenco, Mexico City 07360, Mexico
| | - Julio García-Cordero
- Departamento de Biomedicina MolecularCINVESTAV IPN, Av. IPN # 2508 Col, San Pedro Zacatenco, Mexico City 07360, Mexico
| | - Gaurav Shrivastava
- Laboratory of Malaria and Vector ResearchNational Institute of Allergy and Infectious DiseasesNational Institutes of Health, Rockville, MD, USA
| | - Leticia Cedillo-Barrón
- Departamento de Biomedicina MolecularCINVESTAV IPN, Av. IPN # 2508 Col, San Pedro Zacatenco, Mexico City 07360, Mexico
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7
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Zhang H, Liu H, Wei J, Dang Y, Wang Y, Yang Q, Zhang L, Ye C, Wang B, Jin X, Cheng L, Ma H, Dong Y, Li Y, Bai Y, Lv X, Lei Y, Xu Z, Ye W, Zhang F. Single dose recombinant VSV based vaccine elicits robust and durable neutralizing antibody against Hantaan virus. NPJ Vaccines 2024; 9:28. [PMID: 38341504 DOI: 10.1038/s41541-024-00814-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/11/2024] [Indexed: 02/12/2024] Open
Abstract
Hantaan virus (HTNV) is a pathogenic orthohantavirus prevalent in East Asia that is known to cause hemorrhagic fever with severe renal syndrome (HFRS), which has a high fatality rate. However, a Food and Drug Administration (FDA)-approved vaccine is not currently available against this virus. Although inactivated vaccines have been certified and used in endemic regions for decades, the neutralizing antibody (NAb) titer induced by inactivated vaccines is low and the immunization schedule is complicated, requiring at least three injections spanning approximately 6 months to 1 year. Replication-competent vesicular stomatitis virus (VSV)-based vaccines provide prolonged protection after a single injection. In this study, we successfully engineered the HTNV glycoprotein (GP) in the VSV genome by replacing the VSV-G open reading frame. The resulting recombinant (r) rVSV-HTNV-GP was rescued, and the immunogenicity of GP was similar to that of HTNV. BALB/c mice immunized with rVSV-HTNV-GP showed a high titer of NAb against HTNV after a single injection. Notably, the cross-reactive NAb response induced by rVSV-HTNV-GP against Seoul virus (an orthohantavirus) was higher than that induced by three sequential injections of inactivated vaccines. Upon challenge with HTNV, rVSV-HTNV-GP-immunized mice showed a profoundly reduced viral burden in multiple tissues, and inflammation in the lungs and liver was nearly undetectable. Moreover, a single injection of rVSV-HTNV-GP established a prolonged immunological memory status as the NAbs were sustained for over 1 year and provided long-term protection against HTNV infection. The findings of our study can support further development of an rVSV-HTNV-GP-based HTNV vaccine with a simplified immunization schedule.
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Affiliation(s)
- Hui Zhang
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - He Liu
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Jing Wei
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
- Center for Disease Control and Prevention of Shaanxi Province, Xi'an, Shaanxi, China
| | - Yamei Dang
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Yuan Wang
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Qiqi Yang
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Liang Zhang
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Chuantao Ye
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Bin Wang
- Center of Clinical Aerospace Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Xiaolei Jin
- Student Brigade, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Linfeng Cheng
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Hongwei Ma
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Yangchao Dong
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Yinghui Li
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Yinlan Bai
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Xin Lv
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Yingfeng Lei
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China
| | - Zhikai Xu
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China.
| | - Wei Ye
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China.
| | - Fanglin Zhang
- Department of Microbiology, School of Preclinical Medicine, Airforce Medical University: Fourth Military Medical University, Xi' an, Shaanxi, China.
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8
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Boulton S, Poutou J, Gill R, Alluqmani N, He X, Singaravelu R, Crupi MJ, Petryk J, Austin B, Angka L, Taha Z, Teo I, Singh S, Jamil R, Marius R, Martin N, Jamieson T, Azad T, Diallo JS, Ilkow CS, Bell JC. A T cell-targeted multi-antigen vaccine generates robust cellular and humoral immunity against SARS-CoV-2 infection. Mol Ther Methods Clin Dev 2023; 31:101110. [PMID: 37822719 PMCID: PMC10562195 DOI: 10.1016/j.omtm.2023.101110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/13/2023] [Indexed: 10/13/2023]
Abstract
SARS-CoV-2, the etiological agent behind the coronavirus disease 2019 (COVID-19) pandemic, has continued to mutate and create new variants with increased resistance against the WHO-approved spike-based vaccines. With a significant portion of the worldwide population still unvaccinated and with waning immunity against newly emerging variants, there is a pressing need to develop novel vaccines that provide broader and longer-lasting protection. To generate broader protective immunity against COVID-19, we developed our second-generation vaccinia virus-based COVID-19 vaccine, TOH-VAC-2, encoded with modified versions of the spike (S) and nucleocapsid (N) proteins as well as a unique poly-epitope antigen that contains immunodominant T cell epitopes from seven different SARS-CoV-2 proteins. We show that the poly-epitope antigen restimulates T cells from the PBMCs of individuals formerly infected with SARS-CoV-2. In mice, TOH-VAC-2 vaccination produces high titers of S- and N-specific antibodies and generates robust T cell immunity against S, N, and poly-epitope antigens. The immunity generated from TOH-VAC-2 is also capable of protecting mice from heterologous challenge with recombinant VSV viruses that express the same SARS-CoV-2 antigens. Altogether, these findings demonstrate the effectiveness of our versatile vaccine platform as an alternative or complementary approach to current vaccines.
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Affiliation(s)
- Stephen Boulton
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Joanna Poutou
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Rida Gill
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Nouf Alluqmani
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Xiaohong He
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Ragunath Singaravelu
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Mathieu J.F. Crupi
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Julia Petryk
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Bradley Austin
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Leonard Angka
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Zaid Taha
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Iris Teo
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Pathology and Laboratory Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Siddarth Singh
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Rameen Jamil
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Ricardo Marius
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Nikolas Martin
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Taylor Jamieson
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Taha Azad
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Faculty of Medicine and Health Sciences, Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, QC J1E 4K8, Canada
- Centre de Recherche du CHUS, Sherbrooke, QC J1H 5N4, Canada
| | - Jean-Simon Diallo
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Carolina S. Ilkow
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - John C. Bell
- Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
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9
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Beitari S, Agbayani G, Hewitt M, Duque D, Bavananthasivam J, Sandhu JK, Akache B, Hadžisejdić I, Tran A. Effectiveness of VSV vectored SARS-CoV-2 spike when administered through intranasal, intramuscular or a combination of both. Sci Rep 2023; 13:21390. [PMID: 38049498 PMCID: PMC10695950 DOI: 10.1038/s41598-023-48397-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/26/2023] [Indexed: 12/06/2023] Open
Abstract
A critical feature of the VSV vector platform is the ability to pseudotype the virus with different glycoproteins from other viruses, thus altering cellular tropism of the recombinant virus. The route of administration is critical in triggering local and systemic immune response and protection. Most of the vaccine platforms used at the forefront are administered by intramuscular injection. However, it is not known at what level ACE2 is expressed on the surface of skeletal muscle cells, which will have a significant impact on the efficiency of a VSV-SARS-CoV-2 spike vaccine to mount a protective immune response when administered intramuscularly. In this study, we investigate the immunogenicity and efficacy of a prime-boost immunization regimen administered intranasally (IN), intramuscularly (IM), or combinations of the two. We determined that the prime-boost combinations of IM followed by IN immunization (IM + IN) or IN followed by IN immunization (IN + IN) exhibited strong spike-specific IgG, IgA and T cell response in vaccinated K18 knock-in mice. Hamsters vaccinated with two doses of VSV expressing SARS-CoV-2 spike, both delivered by IN or IM + IN, showed strong protection against SARS-CoV-2 variants of concern Alpha and Delta. This protection was also observed in aged hamsters. Our study underscores the highly crucial role immunization routes have with the VSV vector platform to elicit a strong and protective immune response.
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Affiliation(s)
- Saina Beitari
- Infectious Diseases, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Gerard Agbayani
- Immunomodulation, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Melissa Hewitt
- Preclinical Imaging, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Diana Duque
- Infectious Diseases, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Jegarubee Bavananthasivam
- Infectious Diseases, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Jagdeep K Sandhu
- Preclinical Imaging, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Bassel Akache
- Immunomodulation, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Ita Hadžisejdić
- Clinical Department of Pathology and Cytology Clinical Hospital Center Rijeka, University of Rijeka, Rijeka, Croatia
| | - Anh Tran
- Infectious Diseases, Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada.
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10
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Rak A, Isakova-Sivak I, Rudenko L. Overview of Nucleocapsid-Targeting Vaccines against COVID-19. Vaccines (Basel) 2023; 11:1810. [PMID: 38140214 PMCID: PMC10747980 DOI: 10.3390/vaccines11121810] [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: 11/04/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
The new SARS-CoV-2 coronavirus, which emerged in late 2019, is a highly variable causative agent of COVID-19, a contagious respiratory disease with potentially severe complications. Vaccination is considered the most effective measure to prevent the spread and complications of this infection. Spike (S) protein-based vaccines were very successful in preventing COVID-19 caused by the ancestral SARS-CoV-2 strain; however, their efficacy was significantly reduced when coronavirus variants antigenically different from the original strain emerged in circulation. This is due to the high variability of this major viral antigen caused by escape from the immunity caused by the infection or vaccination with spike-targeting vaccines. The nucleocapsid protein (N) is a much more conserved SARS-CoV-2 antigen than the spike protein and has therefore attracted the attention of scientists as a promising target for broad-spectrum vaccine development. Here, we summarized the current data on various N-based COVID-19 vaccines that have been tested in animal challenge models or clinical trials. Despite the high conservatism of the N protein, escape mutations gradually occurring in the N sequence can affect its protective properties. During the three years of the pandemic, at least 12 mutations have arisen in the N sequence, affecting more than 40 known immunogenic T-cell epitopes, so the antigenicity of the N protein of recent SARS-CoV-2 variants may be altered. This fact should be taken into account as a limitation in the development of cross-reactive vaccines based on N-protein.
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Affiliation(s)
- Alexandra Rak
- Department of Virology, Institute of Experimental Medicine, St. Petersburg 197022, Russia; (I.I.-S.); (L.R.)
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11
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Primard C, Monchâtre-Leroy E, Del Campo J, Valsesia S, Nikly E, Chevandier M, Boué F, Servat A, Wasniewski M, Picard-Meyer E, Courant T, Collin N, Salguero FJ, Le Vert A, Guyon-Gellin D, Nicolas F. OVX033, a nucleocapsid-based vaccine candidate, provides broad-spectrum protection against SARS-CoV-2 variants in a hamster challenge model. Front Immunol 2023; 14:1188605. [PMID: 37409116 PMCID: PMC10319154 DOI: 10.3389/fimmu.2023.1188605] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/19/2023] [Indexed: 07/07/2023] Open
Abstract
Spike-based COVID-19 vaccines induce potent neutralizing antibodies but their efficacy against SARS-CoV-2 variants decreases. OVX033 is a recombinant protein composed of the full-length nucleocapsid (N) protein of SARS-CoV-2 genetically fused to oligoDOM®, a self-assembling domain which improves antigen immunogenicity. OVX033 including N as an antigenic target is proposed as new vaccine candidate providing broad-spectrum protection against sarbecoviruses. OVX033 demonstrated its ability to trigger cross-reactive T cell responses and cross-protection against three variants of SARS-CoV-2 (B.1 Europe, Delta B.1.617.2, and Omicron B.1.1.529) in a hamster challenge model, as evidenced by lower weight loss, lower lung viral loads, and reduced lung histopathological lesions.
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Affiliation(s)
| | | | | | | | | | | | - Franck Boué
- ANSES, Laboratory for Rabies and Wildlife, Malzéville, France
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12
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Cacciottolo M, Nice JB, Li Y, LeClaire MJ, Twaddle R, Mora CL, Adachi SY, Chin ER, Young M, Angeles J, Elliott K, Sun M. Exosome-Based Multivalent Vaccine: Achieving Potent Immunization, Broadened Reactivity, and Strong T-Cell Responses with Nanograms of Proteins. Microbiol Spectr 2023; 11:e0050323. [PMID: 37093009 PMCID: PMC10269692 DOI: 10.1128/spectrum.00503-23] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/03/2023] [Indexed: 04/25/2023] Open
Abstract
Currently approved vaccines against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have focused solely on the spike protein to provide immunity. The first vaccines were developed rapidly using spike mRNA delivered by lipid nanoparticles but required ultralow-temperature storage and have had limited immunity against variations in spike. Subsequently, protein-based vaccines were developed, which offer broader immunity but require significant time for development and the use of an adjuvant to boost the immune response. Here, exosomes were used to deliver a bivalent protein-based vaccine in which two independent viral proteins were used. Exosomes were engineered to express either SARS-CoV-2 delta spike (Stealth X-Spike [STX-S]) or the more conserved nucleocapsid (Stealth X-Nucleocapsid [STX-N]) protein on the surface. When administered as a single product (STX-S or STX-N) or in combination (STX-S+N), both STX-S and STX-N induced strong immunization with the production of potent humoral and cellular immune responses. Interestingly, these results were obtained with the administration of only nanograms of protein and without an adjuvant. In two independent animal models (mouse and rabbit), the administration of nanograms of the STX-S+N vaccine resulted in increased antibody production, potent neutralizing antibodies with cross-reactivity to other variants of spike, and strong T-cell responses. Importantly, no competition of immune responses was observed, allowing the delivery of nucleocapsid with spike to offer improved SARS-CoV-2 immunity. These data show that the StealthX exosome platform has the enormous potential to revolutionize vaccinology by combining the advantages of mRNA and recombinant protein vaccines into a superior, rapidly generated, low-dose vaccine resulting in potent, broader immunity. IMPORTANCE The pandemic emergency has brought to light the need for a new generation of rapidly developed vaccines that induce longer-lasting, potent, and broader immune responses. While the mRNA vaccines played a critical role during the emergency in reducing SARS-CoV-2 hospitalization rates and deaths, more efficient approaches are needed. A multivalent, protein-based vaccine delivered by exosomes could meet this urgent need due to the high speed of development, manufacturability, and the ability to produce a strong antibody response, with neutralizing antibodies and a strong T-cell response able to broadly combat viral infection with a minimum number of injections.
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Affiliation(s)
| | - Justin B Nice
- Capricor Therapeutics, Inc., San Diego, California, USA
| | - Yujia Li
- Capricor Therapeutics, Inc., San Diego, California, USA
| | | | - Ryan Twaddle
- Capricor Therapeutics, Inc., San Diego, California, USA
| | - Ciana L. Mora
- Capricor Therapeutics, Inc., San Diego, California, USA
| | | | | | | | - Jenna Angeles
- Capricor Therapeutics, Inc., San Diego, California, USA
| | | | - Minghao Sun
- Capricor Therapeutics, Inc., San Diego, California, USA
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13
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Bonam SR, Hu H. Next-Generation Vaccines Against COVID-19 Variants: Beyond the Spike Protein. ZOONOSES (BURLINGTON, MASS.) 2023; 3:10.15212/zoonoses-2023-0003. [PMID: 38031548 PMCID: PMC10686570 DOI: 10.15212/zoonoses-2023-0003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Vaccines are among the most effective medical countermeasures against infectious diseases. The current Coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has spurred the scientific strategies to fight against the disease. Since 2020, a great number of vaccines based on different platforms have been in development in response to the pandemic, among which mRNA, adenoviral vector, and subunit vaccines have been clinically approved for use in humans. These first-generation COVID-19 vaccines largely target the viral spike (S) protein and aim for eliciting potent neutralizing antibodies. With the emergence of SARS-CoV-2 variants, especially the highly transmissible Omicron strains, the S-based vaccine strategies have been faced constant challenges due to strong immune escape by the variants. The coronavirus nucleocapsid (N) is one of the viral proteins that induces strong T-cell immunity and is more conserved across different SARS-CoV-2 variants. Inclusion of N in the development of COVID-19 vaccines has been reported. Here, we briefly reviewed and discussed COVID-19 disease, current S-based vaccine strategies, and focused on the immunobiology of N protein in SARS-CoV-2 host immunity, as well as the next-generation vaccine strategies involving N protein, to combat current and emerging SARS-CoV-2 variants.
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Affiliation(s)
- Srinivasa Reddy Bonam
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA 77555
| | - Haitao Hu
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA 77555
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA 77555
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX, USA 77555
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14
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Hasanpourghadi M, Novikov M, Ambrose R, Chekaoui A, Newman D, Ding J, Giles-Davis W, Xiang Z, Zhou XY, Liu Q, Swagata K, Ertl HCJ. Heterologous chimpanzee adenovirus vector immunizations for SARS-CoV-2 spike and nucleocapsid protect hamsters against COVID-19. Microbes Infect 2022; 25:105082. [PMID: 36539010 PMCID: PMC9758783 DOI: 10.1016/j.micinf.2022.105082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/30/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Available COVID-19 vaccine only provide protection for a limited time due in part to the rapid emergence of viral variants with spike protein mutations, necessitating the generation of new vaccines to combat SARS-CoV-2. Two serologically distinct replication-defective chimpanzee-origin adenovirus (Ad) vectors (AdC) called AdC6 and AdC7 expressing early SARS-CoV-2 isolate spike (S) or nucleocapsid (N) proteins, the latter expressed as a fusion protein within herpes simplex virus glycoprotein D (gD), were tested individually or as a mixture in a hamster COVID-19 SARS-CoV-2 challenge model. The S protein expressing AdC (AdC-S) vectors induced antibodies including those with neutralizing activity that in part cross-reacted with viral variants. Hamsters vaccinated with the AdC-S vectors were protected against serious disease and showed accelerated recovery upon SARS-CoV-2 challenge. Protection was enhanced if AdC-S vectors were given together with the AdC vaccines that expressed the gD N fusion protein (AdC-gDN). In contrast hamsters that just received the AdC-gDN vaccines showed only marginal lessening of symptoms compared to control animals. These results indicate that immune response to the N protein that is less variable than the S protein may potentiate and prolong protection achieved by the currently used S protein based genetic COVID-19 vaccines.
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Affiliation(s)
| | - Mikhail Novikov
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Robert Ambrose
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Arezki Chekaoui
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Dakota Newman
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Jianyi Ding
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | | | - Zhiquan Xiang
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Xiang Yang Zhou
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Qin Liu
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Kar Swagata
- Bioqual Inc., 9600 Medical Center Dr #101, Rockville, MD 20850
| | - Hildegund CJ. Ertl
- The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA,Corresponding author. Tel.: +1 215-898-3863
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