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White CL, Glover MA, Gandhapudi SK, Richards KA, Sant AJ. Flublok Quadrivalent Vaccine Adjuvanted with R-DOTAP Elicits a Robust and Multifunctional CD4 T Cell Response That Is of Greater Magnitude and Functional Diversity Than Conventional Adjuvant Systems. Vaccines (Basel) 2024; 12:281. [PMID: 38543915 PMCID: PMC10975948 DOI: 10.3390/vaccines12030281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/20/2024] [Accepted: 02/29/2024] [Indexed: 04/01/2024] Open
Abstract
It is clear that new approaches are needed to promote broadly protective immunity to viral pathogens, particularly those that are prone to mutation and escape from antibody-mediated immunity. CD4+ T cells, known to target many viral proteins and highly conserved peptide epitopes, can contribute greatly to protective immunity through multiple mechanisms. Despite this potential, CD4+ T cells are often poorly recruited by current vaccine strategies. Here, we have analyzed a promising new adjuvant (R-DOTAP), as well as conventional adjuvant systems AddaVax with or without an added TLR9 agonist CpG, to promote CD4+ T cell responses to the licensed vaccine Flublok containing H1, H3, and HA-B proteins. Our studies, using a preclinical mouse model of vaccination, revealed that the addition of R-DOTAP to Flublok dramatically enhances the magnitude and functionality of CD4+ T cells specific for HA-derived CD4+ T cell epitopes, far outperforming conventional adjuvant systems based on cytokine EliSpot assays and multiparameter flow cytometry. The elicited CD4+ T cells specific for HA-derived epitopes produce IL-2, IFN-γ, IL-4/5, and granzyme B and have multifunctional potential. Hence, R-DOTAP, which has been verified safe by human studies, can offer exciting opportunities as an immune stimulant for next-generation prophylactic recombinant protein-based vaccines.
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Affiliation(s)
- Chantelle L. White
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester, Rochester, NY 14642, USA; (C.L.W.); (M.A.G.); (K.A.R.)
| | - Maryah A. Glover
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester, Rochester, NY 14642, USA; (C.L.W.); (M.A.G.); (K.A.R.)
| | - Siva K. Gandhapudi
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky School of Medicine, Lexington, KY 40508, USA;
| | - Katherine A. Richards
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester, Rochester, NY 14642, USA; (C.L.W.); (M.A.G.); (K.A.R.)
| | - Andrea J. Sant
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester, Rochester, NY 14642, USA; (C.L.W.); (M.A.G.); (K.A.R.)
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Tan C, Wang N, Deng S, Wu X, Yue C, Jia X, Lyu Y. The development and application of pseudoviruses: assessment of SARS-CoV-2 pseudoviruses. PeerJ 2023; 11:e16234. [PMID: 38077431 PMCID: PMC10710176 DOI: 10.7717/peerj.16234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 09/14/2023] [Indexed: 12/18/2023] Open
Abstract
Although most Coronavirus disease (COVID-19) patients can recover fully, the disease remains a significant cause of morbidity and mortality. In addition to the consequences of acute infection, a proportion of the population experiences long-term adverse effects associated with SARS-CoV-2. Therefore, it is still critical to comprehend the virus's characteristics and how it interacts with its host to develop effective drugs and vaccines against COVID-19. SARS-CoV-2 pseudovirus, a replication-deficient recombinant glycoprotein chimeric viral particle, enables investigations of highly pathogenic viruses to be conducted without the constraint of high-level biosafety facilities, considerably advancing virology and being extensively employed in the study of SARS-CoV-2. This review summarizes three methods of establishing SARS-CoV-2 pseudovirus and current knowledge in vaccine development, neutralizing antibody research, and antiviral drug screening, as well as recent progress in virus entry mechanism and susceptible cell screening. We also discuss the potential advantages and disadvantages.
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Affiliation(s)
- Conglian Tan
- Key Laboratory of Microbial Drugs Innovation and Transformation, Medical College, Yan’an University, Yan’an, Shaanxi, China
- Non-coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China
| | - Nian Wang
- Chengdu Medical College, Chengdu, Sichuan, China
| | - Shanshan Deng
- Non-coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China
| | - Xiaoheng Wu
- Key Laboratory of Microbial Drugs Innovation and Transformation, Medical College, Yan’an University, Yan’an, Shaanxi, China
- Non-coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China
| | - Changwu Yue
- Key Laboratory of Microbial Drugs Innovation and Transformation, Medical College, Yan’an University, Yan’an, Shaanxi, China
| | - Xu Jia
- Non-coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China
| | - Yuhong Lyu
- Key Laboratory of Microbial Drugs Innovation and Transformation, Medical College, Yan’an University, Yan’an, Shaanxi, China
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Laotee S, Duangkaew M, Jivapetthai A, Tharakhet K, Kaewpang P, Prompetchara E, Phumiamorn S, Sapsutthipas S, Trisiriwanich S, Somsaard T, Roytrakul S, Duangkhae P, Ongpipattanakul B, Limpikirati P, Pornputtapong N, Arunmanee W. CHO-produced RBD-Fc subunit vaccines with alternative adjuvants generate immune responses against SARS-CoV-2. PLoS One 2023; 18:e0288486. [PMID: 37450510 PMCID: PMC10348575 DOI: 10.1371/journal.pone.0288486] [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: 01/26/2023] [Accepted: 06/28/2023] [Indexed: 07/18/2023] Open
Abstract
Subunit vaccines feature critical advantages over other vaccine platforms such as stability, price, and minimal adverse effects. To maximize immunological protection of subunit vaccines, adjuvants are considered as main components that are formulated within the subunit vaccine. They can modulate adverse effects and enhance immune outcomes. However, the most suitable formulation providing the best immunological outcomes and safety are still under investigation. In this report, we combined recombinant RBD with human IgG1 Fc to create an RBD dimer. This fusion protein was expressed in CHO and formulated with alternative adjuvants with different immune activation including Montanide ISA51, Poly (I:C), and MPLA/Quil-A® as potential vaccine candidate formulations. Using the murine model, a potent induction of anti-RBD IgG antibodies in immunized mice sera were observed. IgG subclass analyses (IgG1/IgG2a) illustrated that all adjuvanted formulations could stimulate both Th1 and Th2-type immune responses in particular Poly (I:C) and MPLA/Quil-A®, eliciting greater balance. In addition, Montanide ISA51-formulated RBD-Fc vaccination provided a promising level of neutralizing antibodies against live wild-type SARS-CoV-2 in vitro followed by Poly (I:C) and MPLA/Quil-A®, respectively. Also, mice sera from adjuvanted formulations could strongly inhibit RBD:ACE2 interaction. This study offers immunogenicity profiles, forecasted safety based on Vaccine-associated enhanced disease (VAED) caused by Th1-skewed immunity, and neutralizing antibody analysis of candidates of RBD-Fc-based subunit vaccine formulations to obtain an alternative subunit vaccine formulation against SARS-CoV-2.
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Affiliation(s)
- Sedthawut Laotee
- Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Methawee Duangkaew
- Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Araya Jivapetthai
- Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Kittipan Tharakhet
- Center of Excellence in Vaccine Research and Development (Chula Vaccine Research Center, Chula VRC), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Laboratory Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Papatsara Kaewpang
- Center of Excellence in Vaccine Research and Development (Chula Vaccine Research Center, Chula VRC), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Eakachai Prompetchara
- Center of Excellence in Vaccine Research and Development (Chula Vaccine Research Center, Chula VRC), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Laboratory Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Integrated Frontier Biotechnology for Emerging Disease, Chulalongkorn University, Bangkok, Thailand
| | - Supaporn Phumiamorn
- Institute of Biological Products, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Sompong Sapsutthipas
- Institute of Biological Products, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Sakalin Trisiriwanich
- Institute of Biological Products, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Thitiporn Somsaard
- Institute of Biological Products, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Sittiruk Roytrakul
- Functional Proteomics Technology Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology for Development Agency, Pathumthani, Thailand
| | - Parichat Duangkhae
- Viral Vaccine Unit, Biologics Research Group, Research and Development Institute, The Government Pharmaceutical Organization, Bangkok, Thailand
| | - Boonsri Ongpipattanakul
- Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Patanachai Limpikirati
- Department of Food and Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Natapol Pornputtapong
- Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Wanatchaporn Arunmanee
- Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence in Cancer Cell and Molecular Biology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
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