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Jiang T, Huang C, Ruan Q, Huang X, Liang C, Chen Z, Yu X, Peng Y, Liu Z, Cheng G, Dai J, Sun J. Envelope domain III E 324, E 351, and E 380 mutations lever adaptive evolution of DENV-1 genotype I. J Virol 2024:e0118324. [PMID: 39230303 DOI: 10.1128/jvi.01183-24] [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: 07/05/2024] [Accepted: 08/08/2024] [Indexed: 09/05/2024] Open
Abstract
Dengue virus (DENV) gains genetic mutations during continuous transmission and evolution, making the virus more adaptive and virulent. The clade of DENV-1 genotype I has expanded and become the predominant genotype in Asia and the Pacific areas, but the underlying mechanisms are unclear. A combined analysis of nonsynonymous mutations in domain III of the envelope protein and their biological effects on virus pathogenesis and transmission was evaluated. Phylogenetic analyses found three nonsynonymous mutations (V324I, V351L, and V380I) in domain III of the envelope protein, which emerged in 1970s-1990s and stably inherited and expanded in contemporary strains after 2000. We generated reverse-mutated viruses (I324V, L351V, and I380V) based on an infectious clone of an epidemic DENV-1 strain (NIID02-20), and the results suggested that the infectivity of the contemporary epidemic virus (wild type, WT) has increased compared to the reverse mutant viruses in mammalian hosts but not mosquito vectors. The WT virus showed a higher binding affinity to host cells and increased virion stability. In addition, weaker immunogenicity and higher resistance to neutralizing antibodies of the WT virus indicated a trend of immune escape. The data suggested that nonsynonymous mutations of the E protein (V324I, V351L, and V380I) promote infectivity and immune evasion of DENV-1 genotype I, which may facilitate its onward transmission on a global scale. IMPORTANCE We provide evidence that minor sequence variation among dengue virus (DENV) strains can result in increased adaptability and virulence, impacting both the biology of the virus and the antiviral immune response. The genetic mutations of DENV-1 gained during continuous transmission and evolution will offer new clues for the design of novel vaccines against flaviviruses.
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Affiliation(s)
- Tao Jiang
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Chenxiao Huang
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Qianqian Ruan
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
- School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Xiaorong Huang
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Chumin Liang
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Zhiqiang Chen
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Xi Yu
- Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Yihao Peng
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, the Chinese University of Hong Kong (Shenzhen), Shenzhen, China
| | - Zheng Liu
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, the Chinese University of Hong Kong (Shenzhen), Shenzhen, China
| | - Gong Cheng
- Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Jianfeng Dai
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Jiufeng Sun
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
- School of Public Health, Sun Yat-Sen University, Guangzhou, China
- School of Public Health, Nanfang Medical University, Guangzhou, China
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, China
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2
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Sobczak JM, Barkovska I, Balke I, Rothen DA, Mohsen MO, Skrastina D, Ogrina A, Martina B, Jansons J, Bogans J, Vogel M, Bachmann MF, Zeltins A. Identifying Key Drivers of Efficient B Cell Responses: On the Role of T Help, Antigen-Organization, and Toll-like Receptor Stimulation for Generating a Neutralizing Anti-Dengue Virus Response. Vaccines (Basel) 2024; 12:661. [PMID: 38932390 PMCID: PMC11209419 DOI: 10.3390/vaccines12060661] [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: 03/18/2024] [Revised: 05/14/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
T help (Th), stimulation of toll-like receptors (pathogen-associated molecular patterns, PAMPs), and antigen organization and repetitiveness (pathogen-associated structural patterns, PASPs) were shown numerous times to be important in driving B-cell and antibody responses. In this study, we dissected the individual contributions of these parameters using newly developed "Immune-tag" technology. As model antigens, we used eGFP and the third domain of the dengue virus 1 envelope protein (DV1 EDIII), the major target of virus-neutralizing antibodies. The respective proteins were expressed alone or genetically fused to the N-terminal fragment of the cucumber mosaic virus (CMV) capsid protein-nCMV, rendering the antigens oligomeric. In a step-by-step manner, RNA was attached as a PAMP, and/or a universal Th-cell epitope was genetically added for additional Th. Finally, a PASP was added to the constructs by displaying the antigens highly organized and repetitively on the surface of CMV-derived virus-like particles (CuMV VLPs). Sera from immunized mice demonstrated that each component contributed stepwise to the immunogenicity of both proteins. All components combined in the CuMV VLP platform induced by far the highest antibody responses. In addition, the DV1 EDIII induced high levels of DENV-1-neutralizing antibodies only if displayed on VLPs. Thus, combining multiple cues typically associated with viruses results in optimal antibody responses.
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Affiliation(s)
- Jan M. Sobczak
- Department of Immunology, University Clinic of Rheumatology and Immunology, Inselspital, CH-3010 Bern, Switzerland; (D.A.R.); (M.O.M.); (M.V.); (M.F.B.)
- Department of BioMedical Research, University of Bern, CH-3008 Bern, Switzerland
| | - Irena Barkovska
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
| | - Ina Balke
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
| | - Dominik A. Rothen
- Department of Immunology, University Clinic of Rheumatology and Immunology, Inselspital, CH-3010 Bern, Switzerland; (D.A.R.); (M.O.M.); (M.V.); (M.F.B.)
- Department of BioMedical Research, University of Bern, CH-3008 Bern, Switzerland
| | - Mona O. Mohsen
- Department of Immunology, University Clinic of Rheumatology and Immunology, Inselspital, CH-3010 Bern, Switzerland; (D.A.R.); (M.O.M.); (M.V.); (M.F.B.)
- Department of BioMedical Research, University of Bern, CH-3008 Bern, Switzerland
| | - Dace Skrastina
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
| | - Anete Ogrina
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
| | - Byron Martina
- Artemis Bioservices, 2629 JD Delft, The Netherlands;
- Protinhi Therapeutics, 6534 AT Nijmegen, The Netherlands
| | - Juris Jansons
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
| | - Janis Bogans
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
| | - Monique Vogel
- Department of Immunology, University Clinic of Rheumatology and Immunology, Inselspital, CH-3010 Bern, Switzerland; (D.A.R.); (M.O.M.); (M.V.); (M.F.B.)
- Department of BioMedical Research, University of Bern, CH-3008 Bern, Switzerland
| | - Martin F. Bachmann
- Department of Immunology, University Clinic of Rheumatology and Immunology, Inselspital, CH-3010 Bern, Switzerland; (D.A.R.); (M.O.M.); (M.V.); (M.F.B.)
- Department of BioMedical Research, University of Bern, CH-3008 Bern, Switzerland
- Nuffield Department of Medicine, The Jenner Institute, University of Oxford, Oxford OX3 7BN, UK
| | - Andris Zeltins
- Latvian Biomedical Research and Study Centre, LV-1067 Riga, Latvia; (I.B.); (I.B.); (D.S.); (A.O.); (J.J.); (J.B.); (A.Z.)
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Peng ZY, Yang S, Lu HZ, Wang LM, Li N, Zhang HT, Xing SY, Du YN, Deng SQ. A review on Zika vaccine development. Pathog Dis 2024; 82:ftad036. [PMID: 38192053 PMCID: PMC10901608 DOI: 10.1093/femspd/ftad036] [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: 07/19/2023] [Revised: 12/15/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024] Open
Abstract
Zika virus (ZIKV), which belongs to the Flavivirus family, is mainly transmitted via the bite of Aedes mosquitoes. In newborns, ZIKV infection can cause severe symptoms such as microcephaly, while in adults, it can lead to Guillain‒Barré syndrome (GBS). Due to the lack of specific therapeutic methods against ZIKV, the development of a safe and effective vaccine is extremely important. Several potential ZIKV vaccines, such as live attenuated, inactivated, nucleic acid, viral vector, and recombinant subunit vaccines, have demonstrated promising outcomes in clinical trials involving human participants. Therefore, in this review, the recent developmental progress, advantages and disadvantages of these five vaccine types are examined, and practical recommendations for future development are provided.
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Affiliation(s)
- Zhe-Yu Peng
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Song Yang
- Institute of Agro-products Processing, Anhui Academy of Agricultural Sciences, Hefei 230031, Anhui, China
| | - Hong-Zheng Lu
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Lin-Min Wang
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Ni Li
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Hai-Ting Zhang
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Si-Yu Xing
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Yi-Nan Du
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Sheng-Qun Deng
- The Key Laboratory of Microbiology and Parasitology of Anhui Province, the Key Laboratory of Zoon-oses of High Institutions in Anhui, Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
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Chauhan S, Khasa YP. Challenges and Opportunities in the Process Development of Chimeric Vaccines. Vaccines (Basel) 2023; 11:1828. [PMID: 38140232 PMCID: PMC10747103 DOI: 10.3390/vaccines11121828] [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: 05/31/2023] [Revised: 07/22/2023] [Accepted: 08/04/2023] [Indexed: 12/24/2023] Open
Abstract
Vaccines are integral to human life to protect them from life-threatening diseases. However, conventional vaccines often suffer limitations like inefficiency, safety concerns, unavailability for non-culturable microbes, and genetic variability among pathogens. Chimeric vaccines combine multiple antigen-encoding genes of similar or different microbial strains to protect against hyper-evolving drug-resistant pathogens. The outbreaks of dreadful diseases have led researchers to develop economical chimeric vaccines that can cater to a large population in a shorter time. The process development begins with computationally aided omics-based approaches to design chimeric vaccines. Furthermore, developing these vaccines requires optimizing upstream and downstream processes for mass production at an industrial scale. Owing to the complex structures and complicated bioprocessing of evolving pathogens, various high-throughput process technologies have come up with added advantages. Recent advancements in high-throughput tools, process analytical technology (PAT), quality-by-design (QbD), design of experiments (DoE), modeling and simulations, single-use technology, and integrated continuous bioprocessing have made scalable production more convenient and economical. The paradigm shift to innovative strategies requires significant attention to deal with major health threats at the global scale. This review outlines the challenges and emerging avenues in the bioprocess development of chimeric vaccines.
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Affiliation(s)
| | - Yogender Pal Khasa
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India;
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5
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Jain S, Vimal N, Angmo N, Sengupta M, Thangaraj S. Dengue Vaccination: Towards a New Dawn of Curbing Dengue Infection. Immunol Invest 2023; 52:1096-1149. [PMID: 37962036 DOI: 10.1080/08820139.2023.2280698] [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: 11/15/2023]
Abstract
Dengue is an infectious disease caused by dengue virus (DENV) and is a serious global burden. Antibody-dependent enhancement and the ability of DENV to infect immune cells, along with other factors, lead to fatal Dengue Haemorrhagic Fever and Dengue Shock Syndrome. This necessitates the development of a robust and efficient vaccine but vaccine development faces a number of hurdles. In this review, we look at the epidemiology, genome structure and cellular targets of DENV and elaborate upon the immune responses generated by human immune system against DENV infection. The review further sheds light on various challenges in development of a potent vaccine against DENV which is followed by presenting a current account of different vaccines which are being developed or have been licensed.
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Affiliation(s)
- Sidhant Jain
- Independent Researcher, Institute for Globally Distributed Open Research and Education (IGDORE), Rewari, India
| | - Neha Vimal
- Bhaskaracharya College of Applied Sciences, University of Delhi, Delhi, India
| | - Nilza Angmo
- Maitreyi College, University of Delhi, Delhi, India
| | - Madhumita Sengupta
- Janki Devi Bajaj Government Girls College, University of Kota, Kota, India
| | - Suraj Thangaraj
- Swami Ramanand Teerth Rural Government Medical College, Maharashtra University of Health Sciences, Ambajogai, India
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6
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Jagtap S, Pattabiraman C, Sankaradoss A, Krishna S, Roy R. Evolutionary dynamics of dengue virus in India. PLoS Pathog 2023; 19:e1010862. [PMID: 37011104 PMCID: PMC10101646 DOI: 10.1371/journal.ppat.1010862] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 04/13/2023] [Accepted: 03/17/2023] [Indexed: 04/05/2023] Open
Abstract
More than a hundred thousand dengue cases are diagnosed in India annually, and about half of the country's population carries dengue virus-specific antibodies. Dengue propagates and adapts to the selection pressures imposed by a multitude of factors that can lead to the emergence of new variants. Yet, there has been no systematic analysis of the evolution of the dengue virus in the country. Here, we present a comprehensive analysis of all DENV gene sequences collected between 1956 and 2018 from India. We examine the spatio-temporal dynamics of India-specific genotypes, their evolutionary relationship with global and local dengue virus strains, interserotype dynamics and their divergence from the vaccine strains. Our analysis highlights the co-circulation of all DENV serotypes in India with cyclical outbreaks every 3-4 years. Since 2000, genotype III of DENV-1, cosmopolitan genotype of DENV-2, genotype III of DENV-3 and genotype I of DENV-4 have been dominating across the country. Substitution rates are comparable across the serotypes, suggesting a lack of serotype-specific evolutionary divergence. Yet, the envelope (E) protein displays strong signatures of evolution under immune selection. Apart from drifting away from its ancestors and other contemporary serotypes in general, we find evidence for recurring interserotype drift towards each other, suggesting selection via cross-reactive antibody-dependent enhancement. We identify the emergence of the highly divergent DENV-4-Id lineage in South India, which has acquired half of all E gene mutations in the antigenic sites. Moreover, the DENV-4-Id is drifting towards DENV-1 and DENV-3 clades, suggesting the role of cross-reactive antibodies in its evolution. Due to the regional restriction of the Indian genotypes and immunity-driven virus evolution in the country, ~50% of all E gene differences with the current vaccines are focused on the antigenic sites. Our study shows how the dengue virus evolution in India is being shaped in complex ways.
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Affiliation(s)
- Suraj Jagtap
- Department of Chemical Engineering, Indian Institute of Science, Bengaluru, Karnataka, India
| | | | - Arun Sankaradoss
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, Karnataka, India
| | - Sudhir Krishna
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, Karnataka, India
- School of Interdisciplinary Life Sciences, Indian Institute of Technology Goa, Ponda, India
| | - Rahul Roy
- Department of Chemical Engineering, Indian Institute of Science, Bengaluru, Karnataka, India
- Center for BioSystems Science and Engineering, Indian Institute of Science, Bengaluru, Karnataka, India
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7
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Seesen M, Jearanaiwitayakul T, Limthongkul J, Midoeng P, Sunintaboon P, Ubol S. A bivalent form of nanoparticle-based dengue vaccine stimulated responses that potently eliminate both DENV-2 particles and DENV-2-infected cells. Vaccine 2023; 41:1638-1648. [PMID: 36740559 DOI: 10.1016/j.vaccine.2023.01.062] [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: 07/28/2022] [Revised: 11/03/2022] [Accepted: 01/25/2023] [Indexed: 02/05/2023]
Abstract
Dengue is the most prevalent mosquito-borne viral disease and continues to be a global public health concern. Although a licensed dengue vaccine is available, its efficacy and safety profile are not satisfactory. Hence, there remains a need for a safe and effective dengue vaccine. We are currently developing a bivalent dengue vaccine candidate. This vaccine candidate is composed of a C-terminus truncated non-structural protein 1 (NS11-279) and envelope domain III (EDIII) of DENV-2 encapsidated in the nanocarriers, N, N, N-trimethyl chitosan nanoparticles (TMC NPs). The immunogenicity of this bivalent vaccine candidate was investigated in the present study using BALB/c mice. In this work, we demonstrate that NS1 + EDIII TMC NP-immunized mice strongly elicited antigen-specific antibody responses (anti-NS1 and anti-EDIII IgG) and T-cell responses (NS1- and EDIII-specific-CD4+ and CD8+ T cells). Importantly, the antibody response induced by NS1 + EDIII TMC NPs provided antiviral activities against DENV-2, including serotype-specific neutralization and antibody-mediated complement-dependent cytotoxicity. Moreover, the significant upregulation of Th1- and Th2-associated cytokines, as well as the increased levels of antigen-specific IgG2a and IgG1, indicated a balanced Th1/Th2 response. Collectively, our findings suggest that NS1 + EDIII TMC NPs induced protective responses that can not only neutralize infectious DENV-2 but also eliminate DENV-2-infected cells.
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Affiliation(s)
- Mathurin Seesen
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Tuksin Jearanaiwitayakul
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand; Department of Clinical Pathology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand
| | - Jitra Limthongkul
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Panuwat Midoeng
- Division of Pathology, Army Institute of Pathology, Phramongkutklao Hospital, Bangkok, Thailand
| | - Panya Sunintaboon
- Department of Chemistry, Faculty of Science, Mahidol University, Salaya, Nakornpatom, Thailand
| | - Sukathida Ubol
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand.
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8
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Srivastava V, Nand KN, Ahmad A, Kumar R. Yeast-Based Virus-like Particles as an Emerging Platform for Vaccine Development and Delivery. Vaccines (Basel) 2023; 11:vaccines11020479. [PMID: 36851356 PMCID: PMC9965603 DOI: 10.3390/vaccines11020479] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/06/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023] Open
Abstract
Virus-like particles (VLPs) are empty, nanoscale structures morphologically resembling viruses. Internal cavity, noninfectious, and particulate nature with a high density of repeating epitopes, make them an ideal platform for vaccine development and drug delivery. Commercial use of Gardasil-9 and Cervarix showed the usefulness of VLPs in vaccine formulation. Further, chimeric VLPs allow the raising of an immune response against different immunogens and thereby can help reduce the generation of medical or clinical waste. The economically viable production of VLPs significantly impacts their usage, application, and availability. To this end, several hosts have been used and tested. The present review will discuss VLPs produced using different yeasts as fermentation hosts. We also compile a list of studies highlighting the expression and purification of VLPs using a yeast-based platform. We also discuss the advantages of using yeast to generate VLPs over other available systems. Further, the issues or limitations of yeasts for producing VLPs are also summarized. The review also compiles a list of yeast-derived VLP-based vaccines that are presently in public use or in different phases of clinical trials.
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Affiliation(s)
- Vartika Srivastava
- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa
| | - Kripa N. Nand
- Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Aijaz Ahmad
- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa
- Infection Control, Charlotte Maxeke Johannesburg Academic Hospital, National Health Laboratory Service, Johannesburg 2193, South Africa
| | - Ravinder Kumar
- Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Correspondence:
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9
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Shukla R, Rajpoot RK, Poddar A, Ahuja R, Beesetti H, Shanmugam RK, Chaturvedi S, Nayyar K, Singh D, Singamaneni V, Gupta P, Gupta AP, Gairola S, Kumar P, Bedi YS, Jain T, Vashishta B, Patil R, Madan H, Madan S, Kalra R, Sood R, Vishwakarma RA, Reddy DS, Lal AA, Arora U, Khanna N. Cocculus hirsutus-Derived Phytopharmaceutical Drug Has Potent Anti-dengue Activity. Front Microbiol 2021; 12:746110. [PMID: 34912307 PMCID: PMC8667597 DOI: 10.3389/fmicb.2021.746110] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/04/2021] [Indexed: 01/26/2023] Open
Abstract
Dengue is a serious public health concern worldwide, with ∼3 billion people at risk of contracting dengue virus (DENV) infections, with some suffering severe consequences of disease and leading to death. Currently, there is no broad use vaccine or drug available for the prevention or treatment of dengue, which leaves only anti-mosquito strategies to combat the dengue menace. The present study is an extension of our earlier study aimed at determining the in vitro and in vivo protective effects of a plant-derived phytopharmaceutical drug for the treatment of dengue. In our previous report, we had identified a methanolic extract of aerial parts of Cissampelos pareira to exhibit in vitro and in vivo anti-dengue activity against all the four DENV serotypes. The dried aerial parts of C. pareira supplied by local vendors were often found to be mixed with aerial parts of another plant of the same Menispermaceae family, Cocculus hirsutus, which shares common homology with C. pareira. In the current study, we have found C. hirsutus to have more potent anti-dengue activity as compared with C. pareira. The stem part of C. hirsutus was found to be more potent (∼25 times) than the aerial part (stem and leaf) irrespective of the extraction solvent used, viz., denatured spirit, hydro-alcohol (50:50), and aqueous. Moreover, the anti-dengue activity of stem extract in all the solvents was comparable. Hence, an aqueous extract of the stem of C. hirsutus (AQCH) was selected due to greater regulatory compliance. Five chemical markers, viz., Sinococuline, 20-Hydroxyecdysone, Makisterone-A, Magnoflorine, and Coniferyl alcohol, were identified in fingerprinting analysis. In a test of primary dengue infection in the AG129 mice model, AQCH extract at 25 mg/kg body weight exhibited protection when administered four and three times a day. The AQCH was also protective in the secondary DENV-infected AG129 mice model at 25 mg/kg/dose when administered four and three times a day. Additionally, the AQCH extract reduced serum viremia and small intestinal pathologies, viz., viral load, pro-inflammatory cytokines, and vascular leakage. Based on these findings, we have undertaken the potential preclinical development of C. hirsutus-based phytopharmaceutical, which could be studied further for its clinical development for treating dengue.
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Affiliation(s)
- Rahul Shukla
- Translational Health Group, Molecular Medicine Division, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | | | - Ankur Poddar
- Translational Health Group, Molecular Medicine Division, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Richa Ahuja
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | | | - Rajgokul K Shanmugam
- Translational Health Group, Molecular Medicine Division, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Shivam Chaturvedi
- Translational Health Group, Molecular Medicine Division, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | | | - Deepika Singh
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Venugopal Singamaneni
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Prasoon Gupta
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Ajai Prakash Gupta
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Sumeet Gairola
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Pankaj Kumar
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Y S Bedi
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Tapesh Jain
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | | | | | - Harish Madan
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | - Sumit Madan
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | - Rinku Kalra
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | - Ruchi Sood
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | - Ram A Vishwakarma
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - D Srinivasa Reddy
- Council of Scientific and Industrial Research (CSIR)-Indian Institute of Integrative Medicine, Jammu, India
| | - Altaf A Lal
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | - Upasana Arora
- Sun Pharmaceutical Industries Limited, Gurugram, India
| | - Navin Khanna
- Translational Health Group, Molecular Medicine Division, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
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10
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Cuevas-Juárez E, Pando-Robles V, Palomares LA. Flavivirus vaccines: Virus-like particles and single-round infectious particles as promising alternatives. Vaccine 2021; 39:6990-7000. [PMID: 34753613 DOI: 10.1016/j.vaccine.2021.10.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/21/2021] [Indexed: 10/19/2022]
Abstract
The genus flavivirus of the Flaviridae family includes several human pathogens, like dengue, Zika, Japanese encephalitis, and yellow fever virus. These viruses continue to be a significant threat to human health. Vaccination remains the most useful approach to reduce the impact of flavivirus fever. However, currently available vaccines can induce severe side effects or have low effectiveness. An alternative is the use of recombinant vaccines, of which virus-like particles (VLP) and single-round infectious particles (SRIP) are of especial interest. VLP consist of the virus structural proteins produced in a heterologous system that self-assemble in a structure almost identical to the native virus. They are highly immunogenic and have been effective vaccines for other viruses for over 30 years. SRIP are promising vaccine candidates, as they induce both cellular and humoral responses, as viral proteins are expressed. Here, the state of the art to produce both types of particles and their use as vaccines against flaviviruses are discussed. We summarize the different approaches used for the design and production of flavivirus VLP and SRIP, the evidence for their safety and efficacy, and the main challenges for their use as commercial vaccines.
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Affiliation(s)
- Esmeralda Cuevas-Juárez
- Departamento de Medicina Molecular y Bioprocesos. Instituto de Biotecnología. Universidad Nacional Autónoma de México, Ave. Universidad 2001, Cuernavaca, Morelos 62210, México.
| | - Victoria Pando-Robles
- Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Ave. Universidad 655. Cuernavaca, Morelos 62100. México.
| | - Laura A Palomares
- Departamento de Medicina Molecular y Bioprocesos. Instituto de Biotecnología. Universidad Nacional Autónoma de México, Ave. Universidad 2001, Cuernavaca, Morelos 62210, México.
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11
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Imagawa T, Ito M, Matsuda M, Nakashima K, Tokunaga Y, Ohta I, Li TC, Suzuki R, Suzuki T. Virus-like particles with FLAG-tagged envelope protein as a tetravalent dengue vaccine candidate. Sci Rep 2021; 11:17542. [PMID: 34475493 PMCID: PMC8413300 DOI: 10.1038/s41598-021-97038-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 08/17/2021] [Indexed: 11/13/2022] Open
Abstract
The global incidence of dengue, which is caused by dengue virus (DENV) infection, has grown dramatically in recent decades and secondary infection with heterologous serotype of the virus may cause severe symptoms. Efficacious dengue vaccines should be able to provide long-lasting immunity against all four DENV serotypes simultaneously. In this study, we constructed a novel vaccine platform based on tetravalent dengue virus-like particles (DENV-LPs) in which envelope (E) protein carried a FLAG tag sequence at the position located not only in the exterior loop on the protruding domain but outside of dimerization interface of the protein. We demonstrated an effective strategy to produce the DENV-LPs by transient transfection with expression plasmids for pre-membrane and E proteins of DENV-1 to DENV-4 in mammalian cells and to concentrate and purify them with one-step affinity chromatography. Characteristic features of VLPs such as particle size, shape and density were comparable to flavivirus-like particles reported. The neutralizing activity against all four DENV serotypes was successfully induced by immunization with the purified tetravalent VLPs in mice. Simple, one-step purification systems for VLP vaccine platforms using epitope-tagging strategy should be advantageous for vaccine development not only for dengue but for emerging pandemics in the future.
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Affiliation(s)
- Toshifumi Imagawa
- Department of Virology and Parasitology, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Masahiko Ito
- Department of Virology and Parasitology, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Mami Matsuda
- Department of Virology II, National Institute for Infectious Disease, Musashi-murayama, Tokyo, 208-0011, Japan
| | - Kenji Nakashima
- Department of Virology and Parasitology, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Yuhei Tokunaga
- Advanced Research Facilities and Services, Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Isao Ohta
- Advanced Research Facilities and Services, Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Tian-Cheng Li
- Department of Virology II, National Institute for Infectious Disease, Musashi-murayama, Tokyo, 208-0011, Japan
| | - Ryosuke Suzuki
- Department of Virology II, National Institute for Infectious Disease, Musashi-murayama, Tokyo, 208-0011, Japan
| | - Tetsuro Suzuki
- Department of Virology and Parasitology, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan.
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12
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Shukla R, Shanmugam RK, Ramasamy V, Arora U, Batra G, Acklin JA, Krammer F, Lim JK, Swaminathan S, Khanna N. Zika virus envelope nanoparticle antibodies protect mice without risk of disease enhancement. EBioMedicine 2021; 54:102738. [PMID: 32305868 PMCID: PMC7186774 DOI: 10.1016/j.ebiom.2020.102738] [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: 04/28/2019] [Revised: 02/26/2020] [Accepted: 03/12/2020] [Indexed: 12/11/2022] Open
Abstract
Background Zika virus (ZIKV), an arbovirus capable of causing neurological abnormalities, is a recognised human pathogen, for which a vaccine is required. As ZIKV antibodies can mediate antibody-dependent enhancement (ADE) of dengue virus (DENV) infection, a ZIKV vaccine must not only protect against ZIKV but must also not sensitise vaccinees to severe dengue. Methods The N-terminal 80% of ZIKV envelope protein (80E) was expressed in Pichia pastoris and its capacity to self-assemble into particulate structures evaluated using dynamic light scattering and electron microscopy. Antigenic integrity of the 80E protein was evaluated using ZIKV-specific monoclonal antibodies. Its immunogenicity and protective efficacy were assessed in BALB/c and C57BL/6 Stat2−/− mice, respectively. Its capacity to enhance DENV and ZIKV infection was assessed in AG129 and C57BL/6 Stat2−/− mice, respectively. Findings ZIKV-80E protein self-assembled into discrete nanoparticles (NPs), which preserved the antigenic integrity of neutralising epitopes on E domain III (EDIII) and elicited potent ZIKV-neutralising antibodies predominantly against this domain in BALB/c mice. These antibodies conferred statistically significant protection in vivo (p = 0.01, Mantel–Cox test), and did not exacerbate sub-lethal DENV-2 or ZIKV challenges in vivo. Interpretation Yeast-expressed ZIKV-80E, which forms highly immunogenic EDIII-displaying NPs, elicits ZIKV EDIII-specific antibodies capable of offering significant protection in vivo, without the potential risk of ADE upon subsequent DENV-2 or ZIKV infection. This offers a promising vaccine candidate for further development. Funding This study was supported partly by ICGEB, India, and by NIAID, USA.
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Affiliation(s)
- Rahul Shukla
- Recombinant Gene Products Group, Molecular Medicine Division, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Rajgokul K Shanmugam
- Recombinant Gene Products Group, Molecular Medicine Division, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Viswanathan Ramasamy
- Recombinant Gene Products Group, Molecular Medicine Division, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Upasana Arora
- Recombinant Gene Products Group, Molecular Medicine Division, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Gaurav Batra
- Translational Health Science & Technology Institute, NCR Biotech Science Cluster, Faridabad, India
| | - Joshua A Acklin
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Jean K Lim
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, United States
| | - Sathyamangalam Swaminathan
- Recombinant Gene Products Group, Molecular Medicine Division, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India.
| | - Navin Khanna
- Recombinant Gene Products Group, Molecular Medicine Division, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India; Translational Health Science & Technology Institute, NCR Biotech Science Cluster, Faridabad, India.
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13
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Dengue Vaccines: The Promise and Pitfalls of Antibody-Mediated Protection. Cell Host Microbe 2021; 29:13-22. [PMID: 33444553 DOI: 10.1016/j.chom.2020.12.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/12/2020] [Accepted: 12/10/2020] [Indexed: 01/16/2023]
Abstract
More than 390 million human dengue virus (DENV) infections occur each year, worldwide. Dengvaxia, a live-virus tetravalent vaccine from Sanofi Pasteur, was recently approved for human clinical use, although vaccine performance against the four DENV serotypes is highly variable. Other dengue vaccines in advanced clinical testing also demonstrate variability in efficacy. In this review, we outline the benefits and challenges of developing a safe, effective, and balanced DENV vaccine that can provide uniform protection against all four serotypes. Even though T cell biology plays an important role in establishing protective immunity, this review focuses on B cell responses. We discuss the leading dengue vaccine candidates and review the specificity of antibody responses and the known immune correlates of protection against DENV infection. A better understanding of immune correlates of protection against DENV infection will inform the development of a vaccine that can provide long-term, uniform protection.
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14
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Zhang N, Li C, Jiang S, Du L. Recent Advances in the Development of Virus-Like Particle-Based Flavivirus Vaccines. Vaccines (Basel) 2020; 8:vaccines8030481. [PMID: 32867194 PMCID: PMC7565697 DOI: 10.3390/vaccines8030481] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 01/07/2023] Open
Abstract
Flaviviruses include several medically important viruses, such as Zika virus (ZIKV), Dengue virus (DENV), West Nile virus (WNV) and Japanese encephalitis virus (JEV). They have expanded in geographic distribution and refocused international attention in recent years. Vaccination is one of the most effective public health strategies for combating flavivirus infections. In this review, we summarized virus-like particle (VLP)-based vaccines against the above four mentioned flaviviruses. Potential strategies to improve the efficacy of VLP-based flavivirus vaccines were also illustrated. The applications of flavivirus VLPs as tools for viral detection and antiviral drug screening were finally proposed.
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Affiliation(s)
- Naru Zhang
- Department of Clinical Medicine, School of Medicine, Zhejiang University City College, Hangzhou 310015, China; (N.Z.); (C.L.)
| | - Chaoqun Li
- Department of Clinical Medicine, School of Medicine, Zhejiang University City College, Hangzhou 310015, China; (N.Z.); (C.L.)
| | - Shibo Jiang
- School of Basic Medical Sciences, Fudan University, Shanghai 200433, China
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA
- Correspondence: (S.J.); (L.D.)
| | - Lanying Du
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA
- Correspondence: (S.J.); (L.D.)
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15
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Chen RE, Diamond MS. Dengue mouse models for evaluating pathogenesis and countermeasures. Curr Opin Virol 2020; 43:50-58. [PMID: 32950933 PMCID: PMC7774505 DOI: 10.1016/j.coviro.2020.09.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 09/01/2020] [Indexed: 12/14/2022]
Abstract
Dengue virus (DENV) causes the most prevalent arbovirus illness worldwide and is responsible for many debilitating epidemics. The four circulating DENV serotypes infect humans and can cause asymptomatic, mild, moderate, or severe Dengue. Because of the global morbidity and mortality due to Dengue, deployment of a safe and effective tetravalent vaccine has been a high priority, and to date, a partially realized goal. The study of pathogenesis and development of DENV therapeutics and vaccines has been limited by few animal models that recapitulate key features of human disease. Over the past two decades, mouse models of DENV infection have evolved with increasing success. Here, we review the utilization and limitations of mice for studying DENV pathogenesis and evaluating countermeasures.
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Affiliation(s)
- Rita E Chen
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael S Diamond
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA; The Andrew M. and Jane M. Bursky Center for Human Immunology & Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO 63110, USA.
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16
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Izmirly AM, Alturki SO, Alturki SO, Connors J, Haddad EK. Challenges in Dengue Vaccines Development: Pre-existing Infections and Cross-Reactivity. Front Immunol 2020; 11:1055. [PMID: 32655548 PMCID: PMC7325873 DOI: 10.3389/fimmu.2020.01055] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/01/2020] [Indexed: 12/31/2022] Open
Abstract
Dengue is one of the most frequently transmitted mosquito-borne diseases in the world, which creates a significant public health concern globally, especially in tropical and subtropical countries. It is estimated that more than 390 million people are infected with dengue virus each year and around 96 million develop clinical pathologies. Dengue infections are not only a health problem but also a substantial economic burden. To date, there are no effective antiviral therapies and there is only one licensed dengue vaccine that only demonstrated protection in the seropositive (Immune), naturally infected with dengue, but not dengue seronegative (Naïve) vaccines. In this review, we address several immune components and their interplay with the dengue virus. Additionally, we summarize the literature pertaining to current dengue vaccine development and advances. Moreover, we review some of the factors affecting vaccine responses, such as the pre-vaccination environment, and provide an overview of the significant challenges that face the development of an efficient/protective dengue vaccine including the presence of multiple serotypes, antibody-dependent enhancement (ADE), as well as cross-reactivity with other flaviviruses. Finally, we discuss targeting T follicular helper cells (Tfh), a significant cell population that is essential for the production of high-affinity antibodies, which might be one of the elements needed to be specifically targeted to enhance vaccine precision to dengue regardless of dengue serostatus.
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Affiliation(s)
- Abdullah M Izmirly
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Medical Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sana O Alturki
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Medical Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sawsan O Alturki
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Medical Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jennifer Connors
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Elias K Haddad
- Division of Infectious Diseases and HIV Medicine, Department of Medicine, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States
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17
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Wilken L, Rimmelzwaan GF. Adaptive Immunity to Dengue Virus: Slippery Slope or Solid Ground for Rational Vaccine Design? Pathogens 2020; 9:pathogens9060470. [PMID: 32549226 PMCID: PMC7350362 DOI: 10.3390/pathogens9060470] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 12/15/2022] Open
Abstract
The four serotypes of dengue virus are the most widespread causes of arboviral disease, currently placing half of the human population at risk of infection. Pre-existing immunity to one dengue virus serotype can predispose to severe disease following secondary infection with a different serotype. The phenomenon of immune enhancement has complicated vaccine development and likely explains the poor long-term safety profile of a recently licenced dengue vaccine. Therefore, alternative vaccine strategies should be considered. This review summarises studies dissecting the adaptive immune responses to dengue virus infection and (experimental) vaccination. In particular, we discuss the roles of (i) neutralising antibodies, (ii) antibodies to non-structural protein 1, and (iii) T cells in protection and pathogenesis. We also address how these findings could translate into next-generation vaccine approaches that mitigate the risk of enhanced dengue disease. Finally, we argue that the development of a safe and efficacious dengue vaccine is an attainable goal.
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18
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Marques RF, Gimenez AM, Aliprandini E, Novais JT, Cury DP, Watanabe IS, Dominguez MR, Silveira ELV, Amino R, Soares IS. Protective Malaria Vaccine in Mice Based on the Plasmodium vivax Circumsporozoite Protein Fused with the Mumps Nucleocapsid Protein. Vaccines (Basel) 2020; 8:vaccines8020190. [PMID: 32325874 PMCID: PMC7348950 DOI: 10.3390/vaccines8020190] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/16/2020] [Accepted: 04/16/2020] [Indexed: 11/22/2022] Open
Abstract
Plasmodium vivax is the most common species of human malaria parasite found outside Africa, with high endemicity in Asia, Central and South America, and Oceania. Although Plasmodium falciparum causes the majority of deaths, P. vivax can lead to severe malaria and result in significant morbidity and mortality. The development of a protective vaccine will be a major step toward malaria elimination. Recently, a formulation containing the three allelic variants of the P. vivax circumsporozoite protein (PvCSP—All epitopes) showed partial protection in mice after a challenge with the hybrid Plasmodium berghei (Pb) sporozoite, in which the PbCSP central repeats were replaced by the VK210 PvCSP repeats (Pb/Pv sporozoite). In the present study, the chimeric PvCSP allelic variants (VK210, VK247, and P. vivax-like) were fused with the mumps virus nucleocapsid protein in the absence (NLP-CSPR) or presence of the conserved C-terminal (CT) domain of PvCSP (NLP-CSPCT). To elicit stronger humoral and cellular responses, Pichia pastoris yeast was used to assemble them as nucleocapsid-like particles (NLPs). Mice were immunized with each recombinant protein adjuvanted with Poly (I:C) and presented a high frequency of antigen-specific antibody-secreting cells (ASCs) on days 5 and 30, respectively, in the spleen and bone marrow. Moreover, high IgG titers against all PvCSP variants were detected in the sera. Later, these immunized mice with NLP-CSPCT were challenged with Pb/Pv sporozoites. Sterile protection was observed in 30% of the challenged mice. Therefore, this vaccine formulation use has the potential to be a good candidate for the development of a universal vaccine against P. vivax malaria.
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Affiliation(s)
- Rodolfo F. Marques
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (R.F.M.); (A.M.G.); (J.T.N.); (M.R.D.); (E.L.V.S.)
| | - Alba Marina Gimenez
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (R.F.M.); (A.M.G.); (J.T.N.); (M.R.D.); (E.L.V.S.)
- Center of Cellular and Molecular Therapy, Federal University of São Paulo, São Paulo 04044-010 SP, Brazil
| | - Eduardo Aliprandini
- Unit of Malaria Infection & Immunity, Institut Pasteur, 75015 Paris, France; (E.A.); (R.A.)
| | - Janaina T. Novais
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (R.F.M.); (A.M.G.); (J.T.N.); (M.R.D.); (E.L.V.S.)
| | - Diego P. Cury
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (D.P.C.); (I.-S.W.)
| | - Ii-Sei Watanabe
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (D.P.C.); (I.-S.W.)
| | - Mariana R. Dominguez
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (R.F.M.); (A.M.G.); (J.T.N.); (M.R.D.); (E.L.V.S.)
| | - Eduardo L. V. Silveira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (R.F.M.); (A.M.G.); (J.T.N.); (M.R.D.); (E.L.V.S.)
| | - Rogerio Amino
- Unit of Malaria Infection & Immunity, Institut Pasteur, 75015 Paris, France; (E.A.); (R.A.)
| | - Irene S. Soares
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000 SP, Brazil; (R.F.M.); (A.M.G.); (J.T.N.); (M.R.D.); (E.L.V.S.)
- Correspondence:
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19
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Hurtado-Monzón AM, Cordero-Rivera CD, Farfan-Morales CN, Osuna-Ramos JF, De Jesús-González LA, Reyes-Ruiz JM, Del Ángel RM. The role of anti-flavivirus humoral immune response in protection and pathogenesis. Rev Med Virol 2020; 30:e2100. [PMID: 32101633 DOI: 10.1002/rmv.2100] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 12/15/2022]
Abstract
Flavivirus infections are a public health threat in the world that requires the development of safe and effective vaccines. Therefore, the understanding of the anti-flavivirus humoral immune response is fundamental to future studies on flavivirus pathogenesis and the design of anti-flavivirus therapeutics. This review aims to provide an overview of the current understanding of the function and involvement of flavivirus proteins in the humoral immune response as well as the ability of the anti-envelope (anti-E) antibodies to interfere (neutralizing antibodies) or not (non-neutralizing antibodies) with viral infection, and how they can, in some circumstances enhance dengue virus infection on Fc gamma receptor (FcγR) bearing cells through a mechanism known as antibody-dependent enhancement (ADE). Thus, the dual role of the antibodies against E protein poses a formidable challenge for vaccine development. Also, we discuss the roles of antibody binding stoichiometry (the concentration, affinity, or epitope recognition) in the neutralization of flaviviruses and the "breathing" of flavivirus virions in the humoral immune response. Finally, the relevance of some specific antibodies in the design and improvement of effective vaccines is addressed.
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Affiliation(s)
- Arianna Mahely Hurtado-Monzón
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
| | - Carlos Daniel Cordero-Rivera
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
| | - Carlos Noe Farfan-Morales
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
| | - Juan Fidel Osuna-Ramos
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
| | - Luis Adrián De Jesús-González
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
| | - José Manuel Reyes-Ruiz
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
| | - Rosa María Del Ángel
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Ciudad de Mexico, Mexico
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20
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Park J, Lee HY, Khai LT, Thuy NTT, Mai LQ, Jang YS. Addition of Partial Envelope Domain II into Envelope Domain III of Dengue Virus Antigen Potentiates the Induction of Virus-Neutralizing Antibodies and Induces Protective Immunity. Vaccines (Basel) 2020; 8:vaccines8010088. [PMID: 32075300 PMCID: PMC7157711 DOI: 10.3390/vaccines8010088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/05/2020] [Accepted: 02/10/2020] [Indexed: 12/13/2022] Open
Abstract
Dengue virus (DENV) comprises four serotypes in the family Flaviviridae and is a causative agent of dengue-related diseases, including dengue fever. Dengue fever is generally a self-limited febrile illness. However, secondary infection of patients with a suboptimal antibody (Ab) response provokes life-threatening severe dengue hemorrhagic fever or dengue shock syndrome. To develop a potent candidate subunit vaccine against DENV infection, we developed the EDII-cEDIII antigen, which contains partial envelope domain II (EDII) including the fusion loop and BC loop epitopes together with consensus envelope domain III (cEDIII) of all four serotypes of DENV. We purified Ab from mice after immunization with EDII-cEDIII or cEDIII and compared their virus neutralization and Ab-dependent enhancement of DENV infection. Anti-EDII-cEDIII Ab showed stronger neutralizing activity and lower Ab-dependent peak enhancement of DENV infection compared with anti-cEDIII Ab. Following injection of Ab-treated DENV into AG129 mice, anti-EDII-cEDIII Ab ameliorated DENV infection in tissues with primary and secondary infection more effectively than anti-cEDIII Ab. In addition, anti-EDII-cEDIII Ab protected against DENV1, 2, and 4 challenge. We conclude that EDII-cEDIII induces neutralizing and protective Abs, and thus, shows promise as a candidate subunit vaccine for DENV infection.
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Affiliation(s)
- Jisang Park
- Department of Bioactive Material Sciences and Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea
| | - Hyun-Young Lee
- Department of Bioactive Material Sciences and Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea
| | - Ly Tuan Khai
- Department of Hematology, 108 Military Central Hospital, Hanoi 113601, Vietnam
| | | | - Le Quynh Mai
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Yong-Suk Jang
- Department of Bioactive Material Sciences and Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea
- Department of Molecular Biology and The Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju 54896, Korea
- Correspondence:
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Deng SQ, Yang X, Wei Y, Chen JT, Wang XJ, Peng HJ. A Review on Dengue Vaccine Development. Vaccines (Basel) 2020; 8:E63. [PMID: 32024238 PMCID: PMC7159032 DOI: 10.3390/vaccines8010063] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 12/11/2022] Open
Abstract
Dengue virus (DENV) has become a global health threat with about half of the world's population at risk of infection. Although the disease caused by DENV is self-limiting in the first infection, the antibody-dependent enhancement (ADE) effect increases the mortality in the second infection with a heterotypic virus. Since there is no specific efficient medicine in treatment, it is urgent to develop vaccines to prevent infection and disease progression. Currently, only a live attenuated vaccine, chimeric yellow fever 17D-tetravalent dengue vaccine (CYD-TDV), has been licensed for clinical use in some countries, and many candidate vaccines are still under research and development. This review discusses the progress, strengths, and weaknesses of the five types of vaccines including live attenuated vaccine, inactivated virus vaccine, recombinant subunit vaccine, viral vectored vaccine, and DNA vaccine.
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Affiliation(s)
- Sheng-Qun Deng
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China; (S.-Q.D.); (X.Y.); (Y.W.); (J.-T.C.)
| | - Xian Yang
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China; (S.-Q.D.); (X.Y.); (Y.W.); (J.-T.C.)
| | - Yong Wei
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China; (S.-Q.D.); (X.Y.); (Y.W.); (J.-T.C.)
| | - Jia-Ting Chen
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China; (S.-Q.D.); (X.Y.); (Y.W.); (J.-T.C.)
| | - Xiao-Jun Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Guangdong Medical University, Dongguan 523808, China;
| | - Hong-Juan Peng
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China; (S.-Q.D.); (X.Y.); (Y.W.); (J.-T.C.)
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Virus-Like Particle Systems for Vaccine Development against Viruses in the Flaviviridae Family. Vaccines (Basel) 2019; 7:vaccines7040123. [PMID: 31547131 PMCID: PMC6963367 DOI: 10.3390/vaccines7040123] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/07/2019] [Accepted: 09/13/2019] [Indexed: 01/07/2023] Open
Abstract
Viruses in the Flaviviridae family are important human and animal pathogens that impose serious threats to global public health. This family of viruses includes emerging and re-emerging viruses, most of which are transmitted by infected mosquito or tick bites. Currently, there is no protective vaccine or effective antiviral treatment against the majority of these viruses, and due to their growing spread, several strategies have been employed to manufacture prophylactic vaccines against these infectious agents including virus-like particle (VLP) subunit vaccines. VLPs are genomeless viral particles that resemble authentic viruses and contain critical repetitive conformational structures on their surface that can trigger the induction of both humoral and cellular responses, making them safe and ideal vaccine candidates against these viruses. In this review, we focus on the potential of the VLP platform in the current vaccine development against the medically important viruses in the Flaviviridae family.
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Krol E, Brzuska G, Szewczyk B. Production and Biomedical Application of Flavivirus-like Particles. Trends Biotechnol 2019; 37:1202-1216. [PMID: 31003718 DOI: 10.1016/j.tibtech.2019.03.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/14/2019] [Accepted: 03/20/2019] [Indexed: 01/13/2023]
Abstract
Many viruses belonging to the Flaviviridae family are transmitted by invertebrate vectors. Among those transmitted by mosquitos, there are many human pathogens of great medical importance, such as Japanese encephalitis virus, West Nile virus, dengue virus, Zika virus, or yellow fever virus. Millions of people contract mosquito-borne diseases each year, leading to thousands of deaths. Co-circulation of genetically similar flaviviruses in the same areas result in the generation of crossreactive antibodies, which is of serious concern for the development of effective vaccines and diagnostic tests. This review provides comprehensive insight into the potential use of virus-like particles as safe and effective antigens in both diagnostics tests, as well as in the development of vaccines against several mosquito-borne flaviviruses.
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Affiliation(s)
- Ewelina Krol
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland
| | - Gabriela Brzuska
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland
| | - Boguslaw Szewczyk
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307 Gdansk, Poland.
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Shukla R, Ramasamy V, Rajpoot RK, Arora U, Poddar A, Ahuja R, Beesetti H, Swaminathan S, Khanna N. Next generation designer virus-like particle vaccines for dengue. Expert Rev Vaccines 2019; 18:105-117. [PMID: 30587054 DOI: 10.1080/14760584.2019.1562909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION A safe and efficacious vaccine for dengue continues to be an unmet public health need. The recent licensing of a dengue vaccine (Dengvaxia) developed by Sanofi has brought to the fore the safety issue of vaccine-induced infection enhancement. AREAS COVERED This article focuses on two new yeast-produced tetravalent dengue envelope domain III-displaying virus-like particulate vaccine candidates reported in early 2018 and reviews the rationale underlying their design, and pre-clinical data which suggest that these may offer promising alternate options. EXPERT COMMENTARY These are the only vaccine candidates so far to have demonstrated the induction of primarily serotype-specific neutralizing antibodies to all dengue virus serotypes in experimental animals. Interestingly, these antibodies lack infection-enhancing potential when evaluated using the AG129 mouse model.
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Affiliation(s)
- Rahul Shukla
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Viswanathan Ramasamy
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Ravi Kant Rajpoot
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Upasana Arora
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Ankur Poddar
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Richa Ahuja
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Hemalatha Beesetti
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Sathyamangalam Swaminathan
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India
| | - Navin Khanna
- a Recombinant Gene Products Group, Molecular Medicine Division , International Centre for Genetic Engineering & Biotechnology , New Delhi , India.,b NCR Biotech Science Cluster , Translational Health Science & Technology Institute , Faridabad , India
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Tripathi NK, Shrivastava A. Recent Developments in Recombinant Protein-Based Dengue Vaccines. Front Immunol 2018; 9:1919. [PMID: 30190720 PMCID: PMC6115509 DOI: 10.3389/fimmu.2018.01919] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/03/2018] [Indexed: 12/11/2022] Open
Abstract
Recombinant proteins are gaining enormous importance these days due to their wide application as biopharmaceutical products and proven safety record. Various recombinant proteins of therapeutic and prophylactic importance have been successfully produced in microbial and higher expression host systems. Since there is no specific antiviral therapy available against dengue, the prevention by vaccination is the mainstay in reducing the disease burden. Therefore, efficacious vaccines are needed to control the spread of dengue worldwide. Dengue is an emerging viral disease caused by any of dengue virus 1-4 serotypes that affects the human population around the globe. Dengue virus is a single stranded RNA virus encoding three structural proteins (capsid protein, pre-membrane protein, and envelope protein) and seven non-structural proteins (NS1, NS2a, NS2b, NS3, NS4a, NS4b, NS5). As the only licensed dengue vaccine (Dengvaxia) is unable to confer balanced protection against all the serotypes, therefore various approaches for development of dengue vaccines including tetravalent live attenuated, inactivated, plasmid DNA, virus-vectored, virus-like particles, and recombinant subunit vaccines are being explored. These candidates are at different stages of vaccine development and have their own merits and demerits. The promising subunit vaccines are mainly based on envelope or its domain and non-structural proteins of dengue virus. These proteins have been produced in different hosts and are being investigated for development of a successful dengue vaccine. Novel immunogens have been designed employing various strategies like protein engineering and fusion of antigen with various immunostimulatory motif to work as self-adjuvant. Moreover, recombinant proteins can be formulated with novel adjuvants to enhance the immunogenicity and thus conferring better protection to the vaccinees. With the advent of newer and safer host systems, these recombinant proteins can be produced in a cost effective manner at large scale for vaccine studies. In this review, we summarize recent developments in recombinant protein based dengue vaccines that could lead to a good number of efficacious vaccine candidates for future human use and ultimately alternative dengue vaccine candidates.
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Affiliation(s)
- Nagesh K. Tripathi
- Bioprocess Scale Up Facility, Defence Research and Development Establishment, Gwalior, India
| | - Ambuj Shrivastava
- Division of Virology, Defence Research and Development Establishment, Gwalior, India
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