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Xu Y, Sun F, Bai Z, Bian C, Wang X, Zhao Z, Yang P. Cold-adapted influenza-vectored RSV vaccine protects BALB/c mice and cotton rats from RSV challenge. J Med Virol 2024; 96:e29308. [PMID: 39007405 DOI: 10.1002/jmv.29308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 11/03/2023] [Accepted: 11/27/2023] [Indexed: 07/16/2024]
Abstract
Respiratory syncytial virus (RSV) remains the primary cause of lower respiratory tract infections, particularly in infants and the elderly. In this study, we employed reverse genetics to generate a chimeric influenza virus expressing neuraminidase-3F protein conjugate with three repeats of the RSV F protein protective epitope inserted into the NA gene of A/California/7/2009 ca (CA/AA ca), resulting in rFlu/RSV/NA-3F (hereafter, rFRN3). The expression of NA-3F protein was confirmed by Western blotting. The morphology and temperature-sensitive phenotype of rFRN3 were similar to CA/AA ca. Its immunogenicity and protective efficiency were evaluated in BALB/c mice and cotton rats. Intranasal administration of rFRN3 elicited robust humoral, cellular, and to some extent, mucosal immune responses. Compared to controls, rFRN3 protected animals from RSV infection, attenuated lung injury, and reduced viral titers in the nose and lungs post-RSV challenge. These results demonstrate that rFRN3 can trigger RSV-specific immune responses and thus exhibits potent protective efficacy. The "dual vaccine" approach of a cold-adapted influenza vector RSV vaccine will improve the prophylaxis of influenza and RSV infection. rFRN3 thus warrants further clinical investigations as a candidate RSV vaccine.
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Affiliation(s)
- Yongru Xu
- The First Medical Center of Chinese PLA General Hospital, Beijing, China
- Faculty of Hepato-Pancreato-Biliary Surgery, Chinese PLA General Hospital, Beijing, China
- Key Laboratory of Digital Hepatobiliary Surgery, PLA, Institute of Hepatobiliary Surgery of Chinese PLA, Beijing, China
| | - Fang Sun
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Zhifang Bai
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Chengrong Bian
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xiliang Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Zhongpeng Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Penghui Yang
- The First Medical Center of Chinese PLA General Hospital, Beijing, China
- Faculty of Hepato-Pancreato-Biliary Surgery, Chinese PLA General Hospital, Beijing, China
- Key Laboratory of Digital Hepatobiliary Surgery, PLA, Institute of Hepatobiliary Surgery of Chinese PLA, Beijing, China
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Bergeron HC, Murray J, Arora A, Nuñez Castrejon AM, DuBois RM, Anderson LJ, Kauvar LM, Tripp RA. Immune Prophylaxis Targeting the Respiratory Syncytial Virus (RSV) G Protein. Viruses 2023; 15:1067. [PMID: 37243153 PMCID: PMC10221658 DOI: 10.3390/v15051067] [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: 04/06/2023] [Revised: 04/21/2023] [Accepted: 04/26/2023] [Indexed: 05/28/2023] Open
Abstract
The respiratory syncytial virus (RSV) causes significant respiratory disease in young infants and the elderly. Immune prophylaxis in infants is currently limited to palivizumab, an anti-RSV fusion (F) protein monoclonal antibody (mAb). While anti-F protein mAbs neutralize RSV, they are unable to prevent aberrant pathogenic responses provoked by the RSV attachment (G) protein. Recently, the co-crystal structures of two high-affinity anti-G protein mAbs that bind the central conserved domain (CCD) at distinct non-overlapping epitopes were solved. mAbs 3D3 and 2D10 are broadly neutralizing and block G protein CX3C-mediated chemotaxis by binding antigenic sites γ1 and γ2, respectively, which is known to reduce RSV disease. Previous studies have established 3D3 as a potential immunoprophylactic and therapeutic; however, there has been no similar evaluation of 2D10 available. Here, we sought to determine the differences in neutralization and immunity to RSV Line19F infection which recapitulates human RSV infection in mouse models making it useful for therapeutic antibody studies. Prophylactic (24 h prior to infection) or therapeutic (72 h post-infection) treatment of mice with 3D3, 2D10, or palivizumab were compared to isotype control antibody treatment. The results show that 2D10 can neutralize RSV Line19F both prophylactically and therapeutically, and can reduce disease-causing immune responses in a prophylactic but not therapeutic context. In contrast, 3D3 was able to significantly (p < 0.05) reduce lung virus titers and IL-13 in a prophylactic and therapeutic regimen suggesting subtle but important differences in immune responses to RSV infection with mAbs that bind distinct epitopes.
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Affiliation(s)
- Harrison C. Bergeron
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Jackelyn Murray
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Aakash Arora
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
| | - Ana M. Nuñez Castrejon
- Department of Biomolecular Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA; (A.M.N.C.)
| | - Rebecca M. DuBois
- Department of Biomolecular Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA; (A.M.N.C.)
| | - Larry J. Anderson
- Division of Pediatric Infectious Disease, Emory University School of Medicine, Atlanta, GA 30322, USA;
| | | | - Ralph A. Tripp
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
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Nian X, Zhang J, Huang S, Duan K, Li X, Yang X. Development of Nasal Vaccines and the Associated Challenges. Pharmaceutics 2022; 14:1983. [PMID: 36297419 PMCID: PMC9609876 DOI: 10.3390/pharmaceutics14101983] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/16/2022] [Accepted: 09/16/2022] [Indexed: 02/02/2024] Open
Abstract
Viruses, bacteria, fungi, and several other pathogenic microorganisms usually infect the host via the surface cells of respiratory mucosa. Nasal vaccination could provide a strong mucosal and systemic immunity to combat these infections. The intranasal route of vaccination offers the advantage of easy accessibility over the injection administration. Therefore, nasal immunization is considered a promising strategy for disease prevention, particularly in the case of infectious diseases of the respiratory system. The development of a nasal vaccine, particularly the strategies of adjuvant and antigens design and optimization, enabling rapid induction of protective mucosal and systemic responses against the disease. In recent times, the development of efficacious nasal vaccines with an adequate safety profile has progressed rapidly, with effective handling and overcoming of the challenges encountered during the process. In this context, the present report summarizes the most recent findings regarding the strategies used for developing nasal vaccines as an efficient alternative to conventional vaccines.
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Affiliation(s)
- Xuanxuan Nian
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
- Wuhan Institute of Biological Products Co., Ltd., Wuhan 430207, China
| | - Jiayou Zhang
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
- Wuhan Institute of Biological Products Co., Ltd., Wuhan 430207, China
| | - Shihe Huang
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
- Wuhan Institute of Biological Products Co., Ltd., Wuhan 430207, China
| | - Kai Duan
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
- Wuhan Institute of Biological Products Co., Ltd., Wuhan 430207, China
| | - Xinguo Li
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
- Wuhan Institute of Biological Products Co., Ltd., Wuhan 430207, China
| | - Xiaoming Yang
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
- Wuhan Institute of Biological Products Co., Ltd., Wuhan 430207, China
- China National Biotech Group Company Limited, Beijing 100029, China
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Carascal MB, Pavon RDN, Rivera WL. Recent Progress in Recombinant Influenza Vaccine Development Toward Heterosubtypic Immune Response. Front Immunol 2022; 13:878943. [PMID: 35663997 PMCID: PMC9162156 DOI: 10.3389/fimmu.2022.878943] [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: 02/18/2022] [Accepted: 04/20/2022] [Indexed: 12/15/2022] Open
Abstract
Flu, a viral infection caused by the influenza virus, is still a global public health concern with potential to cause seasonal epidemics and pandemics. Vaccination is considered the most effective protective strategy against the infection. However, given the high plasticity of the virus and the suboptimal immunogenicity of existing influenza vaccines, scientists are moving toward the development of universal vaccines. An important property of universal vaccines is their ability to induce heterosubtypic immunity, i.e., a wide immune response coverage toward different influenza subtypes. With the increasing number of studies and mounting evidence on the safety and efficacy of recombinant influenza vaccines (RIVs), they have been proposed as promising platforms for the development of universal vaccines. This review highlights the current progress and advances in the development of RIVs in the context of heterosubtypic immunity induction toward universal vaccine production. In particular, this review discussed existing knowledge on influenza and vaccine development, current hemagglutinin-based RIVs in the market and in the pipeline, other potential vaccine targets for RIVs (neuraminidase, matrix 1 and 2, nucleoprotein, polymerase acidic, and basic 1 and 2 antigens), and deantigenization process. This review also provided discussion points and future perspectives in looking at RIVs as potential universal vaccine candidates for influenza.
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Affiliation(s)
- Mark B Carascal
- Pathogen-Host-Environment Interactions Research Laboratory, Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines.,Clinical and Translational Research Institute, The Medical City, Pasig City, Philippines
| | - Rance Derrick N Pavon
- Pathogen-Host-Environment Interactions Research Laboratory, Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines
| | - Windell L Rivera
- Pathogen-Host-Environment Interactions Research Laboratory, Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines
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Feng F, Wen Z, Chen J, Yuan Y, Wang C, Sun C. Strategies to Develop a Mucosa-Targeting Vaccine against Emerging Infectious Diseases. Viruses 2022; 14:v14030520. [PMID: 35336927 PMCID: PMC8952777 DOI: 10.3390/v14030520] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 02/27/2022] [Accepted: 03/01/2022] [Indexed: 02/06/2023] Open
Abstract
Numerous pathogenic microbes, including viruses, bacteria, and fungi, usually infect the host through the mucosal surfaces of the respiratory tract, gastrointestinal tract, and reproductive tract. The mucosa is well known to provide the first line of host defense against pathogen entry by physical, chemical, biological, and immunological barriers, and therefore, mucosa-targeting vaccination is emerging as a promising strategy for conferring superior protection. However, there are still many challenges to be solved to develop an effective mucosal vaccine, such as poor adhesion to the mucosal surface, insufficient uptake to break through the mucus, and the difficulty in avoiding strong degradation through the gastrointestinal tract. Recently, increasing efforts to overcome these issues have been made, and we herein summarize the latest findings on these strategies to develop mucosa-targeting vaccines, including a novel needle-free mucosa-targeting route, the development of mucosa-targeting vectors, the administration of mucosal adjuvants, encapsulating vaccines into nanoparticle formulations, and antigen design to conjugate with mucosa-targeting ligands. Our work will highlight the importance of further developing mucosal vaccine technology to combat the frequent outbreaks of infectious diseases.
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Affiliation(s)
- Fengling Feng
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (F.F.); (Z.W.); (J.C.); (Y.Y.); (C.W.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Ziyu Wen
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (F.F.); (Z.W.); (J.C.); (Y.Y.); (C.W.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Jiaoshan Chen
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (F.F.); (Z.W.); (J.C.); (Y.Y.); (C.W.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Yue Yuan
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (F.F.); (Z.W.); (J.C.); (Y.Y.); (C.W.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Congcong Wang
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (F.F.); (Z.W.); (J.C.); (Y.Y.); (C.W.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Caijun Sun
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; (F.F.); (Z.W.); (J.C.); (Y.Y.); (C.W.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
- Correspondence:
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Bergeron HC, Tripp RA. Immunopathology of RSV: An Updated Review. Viruses 2021; 13:2478. [PMID: 34960746 PMCID: PMC8703574 DOI: 10.3390/v13122478] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 12/14/2022] Open
Abstract
RSV is a leading cause of respiratory tract disease in infants and the elderly. RSV has limited therapeutic interventions and no FDA-approved vaccine. Gaps in our understanding of virus-host interactions and immunity contribute to the lack of biological countermeasures. This review updates the current understanding of RSV immunity and immunopathology with a focus on interferon responses, animal modeling, and correlates of protection.
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Affiliation(s)
| | - Ralph A. Tripp
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA;
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