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Liu R, Lv Y, Sun W, Li M, Ge N, Zhu C, Ding Y, Liu Z, Ma R, Huang Y, Hou S, Ying Q, Gu T, Wang F, Nie L, Wang Y, Huang W, Shu J, Wu X. Investigation of a subunit protein vaccine for HFRS based on a consensus sequence between envelope glycoproteins of HTNV and SEOV. Virus Res 2023; 334:199149. [PMID: 37329903 PMCID: PMC10410520 DOI: 10.1016/j.virusres.2023.199149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 06/01/2023] [Accepted: 06/07/2023] [Indexed: 06/19/2023]
Abstract
Due to the global resurgence of hemorrhagic fever with renal syndrome (HFRS), more attention is being focused on this dangerous illness. In China and Korea, the only vaccines available are the virus-inactivated vaccine against Hantaan virus (HTNV) or Seoul virus (SEOV), but their efficacy and safety are inadequate. Therefore, it is important to develop new vaccines that are safer and more efficient to neutralize and regulate areas with a high prevalence of HFRS. We employed bioinformatics methods to design a recombinant protein vaccine based on conserved regions of protein consensus sequences in HTNV and SEOV membranes. The S2 Drosophila expression system was utilized to enhance protein expression, solubility and immunogenicity. After the Gn and Gc proteins of HTNV and SEOV were successfully expressed, mice were immunized, and the humoral immunity, cellular immunity, and in vivo protection of the HFRS universal subunit vaccine were systematically evaluated in mouse models. These results indicated that the HFRS subunit vaccine generated elevated levels of binding and neutralizing antibodies, particularly IgG1, compared to that of the traditional inactivated HFRS vaccine. Additionally, the spleen cells of immunized mice secreted IFN-r and IL-4 cytokines effectively. Moreover, the HTNV-Gc protein vaccine successfully protected suckling mice from HTNV infection and stimulated GC responses. In this research, a new scientific approach is investigated to develop a universal HFRS subunit protein vaccine that is capable of producing effective humoral and cellular immunity in mice. The results suggest that this vaccine could be a promising candidate for preventing HFRS in humans.
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Affiliation(s)
- Rongrong Liu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Yunhua Lv
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Wenjie Sun
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China; Northwest University, Xi'an, China
| | - Min Li
- Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Ningning Ge
- Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Cheng Zhu
- Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, China
| | - Yaxin Ding
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China; Northwest University, Xi'an, China
| | - Ziyu Liu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Ruixue Ma
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Yuxiao Huang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Shiyuan Hou
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Qikang Ying
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Tianle Gu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Fang Wang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Lingling Nie
- Division of HIV/AIDS and Sex-transmitted Virus Vaccines, Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC) and WHO Collaborating Center for Standardization and Evaluation of Biologicals, Beijing, China
| | - Youchun Wang
- Division of HIV/AIDS and Sex-transmitted Virus Vaccines, Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC) and WHO Collaborating Center for Standardization and Evaluation of Biologicals, Beijing, China
| | - Weijin Huang
- Division of HIV/AIDS and Sex-transmitted Virus Vaccines, Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC) and WHO Collaborating Center for Standardization and Evaluation of Biologicals, Beijing, China.
| | - Jiayi Shu
- Clinical Center for Biotherapy, Zhongshan Hospital & Zhongshan Hospital (Xiamen), Fudan University, Shanghai, China.
| | - Xingan Wu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China.
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Ma Y, Tang K, Zhang Y, Zhang C, Cheng L, Zhang F, Zhuang R, Jin B, Zhang Y. Protective CD8 + T-cell response against Hantaan virus infection induced by immunization with designed linear multi-epitope peptides in HLA-A2.1/K b transgenic mice. Virol J 2020; 17:146. [PMID: 33028368 PMCID: PMC7538842 DOI: 10.1186/s12985-020-01421-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 09/28/2020] [Indexed: 12/30/2022] Open
Abstract
Background An effective vaccine that prevents disease caused by hantaviruses is a global public health priority, but up to now, no vaccine has been approved for worldwide use. Therefore, novel vaccines with high prophylaxis efficacy are urgently needed. Methods Herein, we designed and synthesized Hantaan virus (HTNV) linear multi-epitope peptide consisting of HLA-A*02-restricted HTNV cytotoxic T cell (CTL) epitope and pan HLA-DR-binding epitope (PADRE), and evaluated the immunogenicity, as well as effectiveness, of multi-epitope peptides in HLA-A2.1/Kb transgenic mice with interferon (IFN)-γ enzyme-linked immunospot assay, cytotoxic mediator detection, proliferation assay and HTNV-challenge test. Results The results showed that a much higher frequency of specific IFN-γ-secreting CTLs, high levels of granzyme B production, and a strong proliferation capacity of specific CTLs were observed in splenocytes of mice immunized with multi-epitope peptide than in those of a single CTL epitope. Moreover, pre-immunization of multi-epitope peptide could reduce the levels of HTNV RNA loads in the liver, spleen and kidneys of mice, indicating that specific CTL responses induced by multi-epitope peptide could reduce HTNV RNA loads in vivo. Conclusions This study may provide an important foundation for the development of novel peptide vaccines for HTNV prophylaxis.
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Affiliation(s)
- Ying Ma
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China.
| | - Kang Tang
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Yusi Zhang
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Chunmei Zhang
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Linfeng Cheng
- Department of Microbiology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Fanglin Zhang
- Department of Microbiology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Ran Zhuang
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Boquan Jin
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Yun Zhang
- Department of Immunology, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China.
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3
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Neukirch L, Fougeroux C, Andersson AMC, Holst PJ. The potential of adenoviral vaccine vectors with altered antigen presentation capabilities. Expert Rev Vaccines 2020; 19:25-41. [PMID: 31889453 DOI: 10.1080/14760584.2020.1711054] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Introduction: Despite their appeal as vaccine vectors, adenoviral vectors are yet unable to induce protective immune responses against some weakly immunogenic antigens. Additionally, the maximum doses of adenovirus-based vaccines are limited by vector-induced toxicity, causing vector elimination and diminished immune responses against the target antigen. In order to increase immune responses to the transgene, while maintaining a moderate vector dose, new technologies for improved transgene presentation have been developed for adenoviral vaccine vectors.Areas covered: This review provides an overview of different genetic-fusion adjuvants that aim to improve antigen presentation in the context of adenoviral vector-based vaccines. The influence on both T cell and B cell responses are discussed, with a main focus on two technologies: MHC class II-associated invariant chain and virus-like-vaccines.Expert opinion: Different strategies have been tested to improve adenovirus-based vaccinations with varying degrees of success. The reviewed genetic adjuvants were designed to increase antigen processing and MHC presentation, or promote humoral immune responses with an improved conformational antigen display. While none of the introduced technologies is universally applicable, this review shall give an overview to identify potential improvements for future vaccination approaches.
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Affiliation(s)
- Lasse Neukirch
- Clinical Cooperation Unit "Applied Tumor Immunity", National Center for Tumor Diseases and German Cancer Research Center, Heidelberg, Germany.,Center for Medical Parasitology, Department of International Health, Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Cyrielle Fougeroux
- Center for Medical Parasitology, Department of International Health, Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Anne-Marie Carola Andersson
- Center for Medical Parasitology, Department of International Health, Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark.,InProTher ApS, Copenhagen, Denmark
| | - Peter Johannes Holst
- Center for Medical Parasitology, Department of International Health, Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark.,InProTher ApS, Copenhagen, Denmark
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Ye C, Wang D, Liu H, Ma H, Dong Y, Yao M, Wang Y, Zhang H, Zhang L, Cheng L, Xu Z, Lei Y, Zhang F, Ye W. An Improved Enzyme-Linked Focus Formation Assay Revealed Baloxavir Acid as a Potential Antiviral Therapeutic Against Hantavirus Infection. Front Pharmacol 2019; 10:1203. [PMID: 31680975 PMCID: PMC6807675 DOI: 10.3389/fphar.2019.01203] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 09/17/2019] [Indexed: 12/18/2022] Open
Abstract
Hantaviruses, etiologic pathogens responsible for two severe human diseases, exist in areas ranging from Eurasia to America and remain global public health concerns. Conventionally, plaque formation assays have been used for hantavirus titering. However, hantaviruses replicate slowly within cells and produce minimal cytopathic effects, making this technique difficult to master. The improved enzyme-linked immunosorbent assay-based antigen detection method is easier to perform but is still time consuming. Here, we established an enzyme-linked focus formation assay (FFA) for Hantaan virus titering that is twice as fast as traditional assays. Moreover, using this method, we evaluated the effects of favipiravir (T-705) and another influenza virus drug, baloxavir acid (BXA), on hantavirus replication. We found that the endonuclease inhibitor BXA exerted similar anti-hantavirus effects as T-705. Overall, we developed a time-saving method for hantavirus titering and suggest BXA as a potential treatment choice for hantavirus-exposed individuals.
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Affiliation(s)
- Chuantao Ye
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China.,Department of Infectious Diseases, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Dan Wang
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, China
| | - He Liu
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Hongwei Ma
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Yangchao Dong
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Min Yao
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Yuan Wang
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Hui Zhang
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Liang Zhang
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Linfeng Cheng
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Zhikai Xu
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Yingfeng Lei
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Fanglin Zhang
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
| | - Wei Ye
- Department of Microbiology, School of Preclinical Medicine, Fourth Military Medical University, Xi'an, China
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5
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Lei Y, Zhao F, Shao J, Li Y, Li S, Chang H, Zhang Y. Application of built-in adjuvants for epitope-based vaccines. PeerJ 2019; 6:e6185. [PMID: 30656066 PMCID: PMC6336016 DOI: 10.7717/peerj.6185] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/29/2018] [Indexed: 12/21/2022] Open
Abstract
Several studies have shown that epitope vaccines exhibit substantial advantages over conventional vaccines. However, epitope vaccines are associated with limited immunity, which can be overcome by conjugating antigenic epitopes with built-in adjuvants (e.g., some carrier proteins or new biomaterials) with special properties, including immunologic specificity, good biosecurity and biocompatibility, and the ability to vastly improve the immune response of epitope vaccines. When designing epitope vaccines, the following types of built-in adjuvants are typically considered: (1) pattern recognition receptor ligands (i.e., toll-like receptors); (2) virus-like particle carrier platforms; (3) bacterial toxin proteins; and (4) novel potential delivery systems (e.g., self-assembled peptide nanoparticles, lipid core peptides, and polymeric or inorganic nanoparticles). This review primarily discusses the current and prospective applications of these built-in adjuvants (i.e., biological carriers) to provide some references for the future design of epitope-based vaccines.
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Affiliation(s)
- Yao Lei
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Furong Zhao
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Junjun Shao
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Yangfan Li
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Shifang Li
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Huiyun Chang
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Yongguang Zhang
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
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6
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Tang K, Cheng L, Zhang C, Zhang Y, Zheng X, Zhang Y, Zhuang R, Jin B, Zhang F, Ma Y. Novel Identified HLA-A*0201-Restricted Hantaan Virus Glycoprotein Cytotoxic T-Cell Epitopes Could Effectively Induce Protective Responses in HLA-A2.1/K b Transgenic Mice May Associate with the Severity of Hemorrhagic Fever with Renal Syndrome. Front Immunol 2017; 8:1797. [PMID: 29312318 PMCID: PMC5732971 DOI: 10.3389/fimmu.2017.01797] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/30/2017] [Indexed: 12/15/2022] Open
Abstract
Hantaan virus (HTNV) infections can cause severe hemorrhagic fever with renal syndrome (HFRS) in humans, which is associated with high fatality rates. Cytotoxic T cell (CTL) responses contribute to virus elimination; however, to date, HLA class I allele-restricted HTNV glycoprotein (GP) epitopes recognized by CTLs have not been reported, limiting our understanding of CTL responses against HTNV infection in humans. In this study, 34 HTNV GP nine-mer epitopes that may bind to HLA-A*0201 molecules were predicted using the BIMAS and SYFPEITHI database. Seven of the epitopes were demonstrated to bind to HLA-A*0201 molecules with high affinity via the T2 cell binding assay and were successfully used to synthesize peptide/HLA-A*0201 tetramers. The results of tetramer staining showed that the frequencies of each epitope-specific CTL were higher in patients with milder HFRS, which indicated that the epitopes may induce protective CTL responses after HTNV infection. IFN-γ-enzyme-linked immunospot analysis further confirmed the immunoreactivity of epitopes by eliciting epitope-specific IFN-γ-producing CTL responses. In an HTNV challenge trial, significant inhibition of HTNV replication characterized by lower levels of antigens and RNA loads was observed in major target organs (liver, spleen, and kidneys) of HLA-A2.1/Kb transgenic mice pre-vaccinated with nonapeptides VV9 (aa8–aa16, VMASLVWPV), SL9 (aa996–aa1004, SLTECPTFL) and LL9 (aa358–aa366, LIWTGMIDL). Importantly, LL9 exhibited the best ability to induce protective CTL responses and showed a prominent effect on the kidneys, potentially preventing kidney injury after HTNV infection. Taken together, our results highlight that HTNV GP-derived HLA-A*0201-restricted epitopes could elicit protective CTL responses against the virus, and that epitope LL9 functions as an immunodominant protective epitope that may advance the design of safe and effective CTL-based HTNV peptide vaccines for humans.
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Affiliation(s)
- Kang Tang
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
| | - Linfeng Cheng
- Department of Microbiology, The Fourth Military Medical University, Xi'an, China
| | - Chunmei Zhang
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
| | - Yusi Zhang
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
| | - Xuyang Zheng
- Department of Infectious Diseases, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | - Yun Zhang
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
| | - Ran Zhuang
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
| | - Boquan Jin
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
| | - Fanglin Zhang
- Department of Microbiology, The Fourth Military Medical University, Xi'an, China
| | - Ying Ma
- Department of Immunology, The Fourth Military Medical University, Xi'an, China
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Ma HW, Ye W, Chen HS, Nie TJ, Cheng LF, Zhang L, Han PJ, Wu XA, Xu ZK, Lei YF, Zhang FL. In-Cell Western Assays to Evaluate Hantaan Virus Replication as a Novel Approach to Screen Antiviral Molecules and Detect Neutralizing Antibody Titers. Front Cell Infect Microbiol 2017; 7:269. [PMID: 28676847 PMCID: PMC5476785 DOI: 10.3389/fcimb.2017.00269] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 06/06/2017] [Indexed: 12/11/2022] Open
Abstract
Hantaviruses encompass rodent-borne zoonotic pathogens that cause severe hemorrhagic fever disease with high mortality rates in humans. Detection of infectious virus titer lays a solid foundation for virology and immunology researches. Canonical methods to assess viral titers rely on visible cytopathic effects (CPE), but Hantaan virus (HTNV, the prototype hantavirus) maintains a relatively sluggish life cycle and does not produce CPE in cell culture. Here, an in-cell Western (ICW) assay was utilized to rapidly measure the expression of viral proteins in infected cells and to establish a novel approach to detect viral titers. Compared with classical approaches, the ICW assay is accurate and time- and cost-effective. Furthermore, the ICW assay provided a high-throughput platform to screen and identify antiviral molecules. Potential antiviral roles of several DExD/H box helicase family members were investigated using the ICW assay, and the results indicated that DDX21 and DDX60 reinforced IFN responses and exerted anti-hantaviral effects, whereas DDX50 probably promoted HTNV replication. Additionally, the ICW assay was also applied to assess NAb titers in patients and vaccine recipients. Patients with prompt production of NAbs tended to have favorable disease outcomes. Modest NAb titers were found in vaccinees, indicating that current vaccines still require improvements as they cannot prime host humoral immunity with high efficiency. Taken together, our results indicate that the use of the ICW assay to evaluate non-CPE Hantaan virus titer demonstrates a significant improvement over current infectivity approaches and a novel technique to screen antiviral molecules and detect NAb efficacies.
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Affiliation(s)
- Hong-Wei Ma
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Wei Ye
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - He-Song Chen
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Tie-Jian Nie
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical UniversityXi'an, China
| | - Lin-Feng Cheng
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Liang Zhang
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Pei-Jun Han
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Xing-An Wu
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Zhi-Kai Xu
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Ying-Feng Lei
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
| | - Fang-Lin Zhang
- Department of Microbiology, Fourth Military Medical UniversityXi'an, China
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8
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Ma H, Han P, Ye W, Chen H, Zheng X, Cheng L, Zhang L, Yu L, Wu X, Xu Z, Lei Y, Zhang F. The Long Noncoding RNA NEAT1 Exerts Antihantaviral Effects by Acting as Positive Feedback for RIG-I Signaling. J Virol 2017; 91:e02250-16. [PMID: 28202761 PMCID: PMC5391460 DOI: 10.1128/jvi.02250-16] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 02/07/2017] [Indexed: 11/20/2022] Open
Abstract
Hantavirus infection, which causes zoonotic diseases with a high mortality rate in humans, has long been a global public health concern. Over the past decades, accumulating evidence suggests that long noncoding RNAs (lncRNAs) play key regulatory roles in innate immunity. However, the involvement of host lncRNAs in hantaviral control remains uncharacterized. In this study, we identified the lncRNA NEAT1 as a vital antiviral modulator. NEAT1 was dramatically upregulated after Hantaan virus (HTNV) infection, whereas its downregulation in vitro or in vivo delayed host innate immune responses and aggravated HTNV replication. Ectopic expression of NEAT1 enhanced beta interferon (IFN-β) production and suppressed HTNV infection. Further investigation suggested that NEAT1 served as positive feedback for RIG-I signaling. HTNV infection activated NEAT1 transcription through the RIG-I-IRF7 pathway, whereas NEAT1 removed the transcriptional inhibitory effects of the splicing factor proline- and glutamine-rich protein (SFPQ) by relocating SFPQ to paraspeckles, thus promoting the expression of RIG-I and DDX60. RIG-I and DDX60 had synergic effects on IFN production. Taken together, our findings demonstrate that NEAT1 modulates the innate immune response against HTNV infection, providing another layer of information about the role of lncRNAs in controlling viral infections.IMPORTANCE Hantaviruses have attracted worldwide attention as archetypal emerging pathogens. Recently, increasing evidence has highlighted long noncoding RNAs (lncRNAs) as key regulators of innate immunity; however, their roles in hantavirus infection remain unknown. In the present work, a new unexplored function of lncRNA NEAT1 in controlling HTNV replication was found. NEAT1 promoted interferon (IFN) responses by acting as positive feedback for RIG-I signaling. This lncRNA was induced by HTNV through the RIG-I-IRF7 pathway in a time- and dose-dependent manner and promoted HTNV-induced IFN production by facilitating RIG-I and DDX60 expression. Intriguingly, NEAT1 relocated SFPQ and formed paraspeckles after HTNV infection, which might reverse inhibitive effects of SFPQ on the transcription of RIG-I and DDX60. To the best of our knowledge, this is the first study to address the regulatory role of the lncRNA NEAT1 in host innate immunity after HTNV infection. In summary, our findings provide additional insights regarding the role of lncRNAs in controlling viral infections.
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Affiliation(s)
- Hongwei Ma
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Peijun Han
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Wei Ye
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Hesong Chen
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Xuyang Zheng
- Center of Infectious Diseases, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Linfeng Cheng
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Liang Zhang
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Lan Yu
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Xing'an Wu
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Zhikai Xu
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Yingfeng Lei
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
| | - Fanglin Zhang
- Department of Microbiology, Fourth Military Medical University, Xi'an, China
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9
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Jiang DB, Sun LJ, Cheng LF, Zhang JP, Xiao SB, Sun YJ, Yang SY, Wang J, Zhang FL, Yang K. Recombinant DNA vaccine of Hantavirus Gn and LAMP1 induced long-term immune protection in mice. Antiviral Res 2017; 138:32-39. [PMID: 27923570 DOI: 10.1016/j.antiviral.2016.12.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Prophylaxis is widely adopted the best choice against Hemorrhagic fever with renal syndrome (HFRS) caused by Hantavirus. However, loss of memory immune response maintenance remains as major shortcoming in current HFRS vaccine. A recombinant DNA vaccine, pVAX-LAMP/Gn was previously proved efficient, requiring long-term evaluations. METHODS & RESULTS Immune responses of Balb/c mice were assessed by specific and neutralizing antibodies, interferon-γ ELISpot assay, and cytotoxic T-lymphocyte cytotoxicity assay. HTNV-challenge assay identified long-term protection. Safety was confirmed by histological and behavioral analysis. Epitope-spreading phenomenon was noted, revealing two sets of dominant T-cell epitopes cross-species. CONCLUSION pVAX-LAMP/Gn established memory responses within a long-term protection. Lysosome-targeted strategy showed promise on Gn-based DNA vaccine and further investigations are warranted in other immunogenic Hantaviral antigens.
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Affiliation(s)
- Dong-Bo Jiang
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Li-Juan Sun
- Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Lin-Feng Cheng
- Department of Microbiology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Jin-Peng Zhang
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Shao-Bo Xiao
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Yuan-Jie Sun
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Shu-Ya Yang
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Jing Wang
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China
| | - Fang-Lin Zhang
- Department of Microbiology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China.
| | - Kun Yang
- Department of Immunology, Fourth Military Medical University, No.169, Changle W. Rd., Xi'an, 710032, China.
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10
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Cheng LF, Wang F, Zhang L, Yu L, Ye W, Liu ZY, Ying QK, Wu XA, Xu ZK, Zhang FL. Incorporation of GM-CSF or CD40L Enhances the Immunogenicity of Hantaan Virus-Like Particles. Front Cell Infect Microbiol 2016; 6:185. [PMID: 28066721 PMCID: PMC5167722 DOI: 10.3389/fcimb.2016.00185] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/29/2016] [Indexed: 12/22/2022] Open
Abstract
A safe and effective Hantaan virus (HTNV) vaccine is highly desirable because HTNV causes an acute and often fatal disease (hemorrhagic fever with renal syndrome, HFRS). Since the immunity of the inactivated vaccine is weak and the safety is poor, HTNV virus-like particles (VLPs) offer an attractive and safe alternative. These particles lack the viral genome but are perceived by the immune system as virus particles. We hypothesized that adding immunostimulatory signals to VLPs would enhance their efficacy. To accomplish this enhancement, we generated chimeric HTNV VLPs containing glycosylphosphatidylinositol (GPI)-anchored granulocyte macrophage colony-stimulating factor (GM-CSF) or CD40 ligand (CD40L) and investigated their biological activity in vitro. The immunization of mice with chimeric HTNV VLPs containing GM-CSF or CD40L induced stronger humoral immune responses and cellular immune responses compared to the HTNV VLPs and Chinese commercial inactivated hantavirus vaccine. Chimeric HTNV VLPs containing GM-CSF or CD40L also protected mice from an HTNV challenge. Altogether, our results suggest that anchoring immunostimulatory molecules into HTNV VLPs can be a potential approach for the control and prevention of HFRS.
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Affiliation(s)
- Lin-Feng Cheng
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Fang Wang
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Liang Zhang
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Lan Yu
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Wei Ye
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Zi-Yu Liu
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Qi-Kang Ying
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Xing-An Wu
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Zhi-Kai Xu
- Department of Microbiology, Fourth Military Medical University Xi'an, China
| | - Fang-Lin Zhang
- Department of Microbiology, Fourth Military Medical University Xi'an, China
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11
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Ma RX, Cheng LF, Ying QK, Liu RR, Ma TJ, Zhang XX, Liu ZY, Zhang L, Ye W, Zhang FL, Xu ZK, Wang F, Wu XA. Screening and Identification of an H-2K b-Restricted CTL Epitope within the Glycoprotein of Hantaan Virus. Front Cell Infect Microbiol 2016; 6:151. [PMID: 27933274 PMCID: PMC5122572 DOI: 10.3389/fcimb.2016.00151] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Accepted: 10/31/2016] [Indexed: 12/12/2022] Open
Abstract
The cytotoxic T lymphocyte (CTL) response plays a key role in controlling viral infection, but only a few epitopes within the HTNV glycoprotein (GP) that are recognized by CTLs have been reported. In this study, we identified one murine HTNV GP-derived H2-Kb-restricted CTL epitope in C57BL/6 mice, which could be used to design preclinical studies of vaccines for HTNV infection. First, 15 8-mer peptides were selected from the HTNV GP amino acid sequence based on a percentile rank of <=1% by IEDB which is the most comprehensive collection of epitope prediction and analysis tool. A lower percentile rank indicates higher affinity and higher immune response. In the case of the consensus method, we also evaluated the binding score of peptide-binding affinity by the BIMAS software to confirm that all peptides were able to bind H2-Kb. Second, one novel GP-derived CTL epitope, GP6 aa456-aa463 (ITSLFSLL), was identified in the splenocytes of HTNV-infected mice using the IFN-γ ELISPOT assay. Third, a single peptide vaccine was administered to C57BL/6 mice to evaluate the immunogenic potential of the identified peptides. ELISPOT and cell-mediated cytotoxicity assays showed that this peptide vaccine induced a strong IFN-γ response and potent cytotoxicity in immunized mice. Last, we demonstrated that the peptide-vaccinated mice had partial protection from challenge with HTNV. In conclusion, we identified an H2-Kb-restricted CTL epitope with involvement in the host immune response to HTNV infection.
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Affiliation(s)
- Rui-Xue Ma
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Lin-Feng Cheng
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Qi-Kang Ying
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Rong-Rong Liu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Tie-Jun Ma
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Xiao-Xiao Zhang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Zi-Yu Liu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Liang Zhang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Wei Ye
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Fang-Lin Zhang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Zhi-Kai Xu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Fang Wang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Xing-An Wu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
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12
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Ma Y, Cheng L, Yuan B, Zhang Y, Zhang C, Zhang Y, Tang K, Zhuang R, Chen L, Yang K, Zhang F, Jin B. Structure and Function of HLA-A*02-Restricted Hantaan Virus Cytotoxic T-Cell Epitope That Mediates Effective Protective Responses in HLA-A2.1/K(b) Transgenic Mice. Front Immunol 2016; 7:298. [PMID: 27551282 PMCID: PMC4976285 DOI: 10.3389/fimmu.2016.00298] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 07/22/2016] [Indexed: 12/11/2022] Open
Abstract
Hantavirus infections cause severe emerging diseases in humans and are associated with high mortality rates; therefore, they have become a global public health concern. Our previous study showed that the CD8(+) T-cell epitope aa129-aa137 (FVVPILLKA, FA9) of the Hantaan virus (HTNV) nucleoprotein (NP), restricted by human leukocyte antigen (HLA)-A*02, induced specific CD8(+) T-cell responses that controlled HTNV infection in humans. However, the in vivo immunogenicity of peptide FA9 and the effect of FA9-specific CD8(+) T-cell immunity remain unclear. Here, based on a detailed structural analysis of the peptide FA9/HLA-A*0201 complex and functional investigations using HLA-A2.1/K(b) transgenic (Tg) mice, we found that the overall structure of the peptide FA9/HLA-A*0201 complex displayed a typical MHC class I fold with Val2 and Ala9 as primary anchor residues and Val3 and Leu7 as secondary anchor residues that allow peptide FA9 to bind tightly with an HLA-A*0201 molecule. Residues in the middle portion of peptide FA9 extruding out of the binding groove may be the sites that allow for recognition by T-cell receptors. Immunization with peptide FA9 in HLA-A2.1/K(b) Tg mice induced FA9-specific cytotoxic T-cell responses characterized by the induction of high expression levels of interferon-γ, tumor necrosis factor-α, granzyme B, and CD107a. In an HTNV challenge trial, significant reductions in the levels of both the antigens and the HTNV RNA loads were observed in the liver, spleen, and kidneys of Tg mice pre-vaccinated with peptide FA9. Thus, our findings highlight the ability of HTNV epitope-specific CD8(+) T-cell immunity to control HTNV and support the possibility that the HTNV-NP FA9 peptide, naturally processed in vivo in an HLA-A*02-restriction manner, may be a good candidate for the development HTNV peptide vaccines.
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Affiliation(s)
- Ying Ma
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Linfeng Cheng
- Department of Microbiology, The Fourth Military Medical University , Xi'an , China
| | - Bin Yuan
- Institute of Orthopaedics of Xijing Hospital, The Fourth Military Medical University , Xi'an , China
| | - Yusi Zhang
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Chunmei Zhang
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Yun Zhang
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Kang Tang
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Ran Zhuang
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Lihua Chen
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Kun Yang
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
| | - Fanglin Zhang
- Department of Microbiology, The Fourth Military Medical University , Xi'an , China
| | - Boquan Jin
- Department of Immunology, The Fourth Military Medical University , Xi'an , China
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13
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Animal Models for the Study of Rodent-Borne Hemorrhagic Fever Viruses: Arenaviruses and Hantaviruses. BIOMED RESEARCH INTERNATIONAL 2015; 2015:793257. [PMID: 26266264 PMCID: PMC4523679 DOI: 10.1155/2015/793257] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 06/14/2015] [Indexed: 11/20/2022]
Abstract
Human pathogenic hantaviruses and arenaviruses are maintained in nature by persistent infection of rodent carrier populations. Several members of these virus groups can cause significant disease in humans that is generically termed viral hemorrhagic fever (HF) and is characterized as a febrile illness with an increased propensity to cause acute inflammation. Human interaction with rodent carrier populations leads to infection. Arenaviruses are also viewed as potential biological weapons threat agents. There is an increased interest in studying these viruses in animal models to gain a deeper understating not only of viral pathogenesis, but also for the evaluation of medical countermeasures (MCM) to mitigate disease threats. In this review, we examine current knowledge regarding animal models employed in the study of these viruses. We include analysis of infection models in natural reservoirs and also discuss the impact of strain heterogeneity on the susceptibility of animals to infection. This information should provide a comprehensive reference for those interested in the study of arenaviruses and hantaviruses not only for MCM development but also in the study of viral pathogenesis and the biology of these viruses in their natural reservoirs.
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14
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Jiang DB, Sun YJ, Cheng LF, Zhang GF, Dong C, Jin BQ, Song CJ, Ma Y, Zhang FL, Yang K. Construction and evaluation of DNA vaccine encoding Hantavirus glycoprotein N-terminal fused with lysosome-associated membrane protein. Vaccine 2015; 33:3367-76. [PMID: 26027907 DOI: 10.1016/j.vaccine.2015.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 04/10/2015] [Accepted: 05/05/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND Hantaviral diseases can have a high case fatality rate within the absence of broadly effective antiviral treatments or vaccines. We developed a DNA vaccine targeting the Hantavirus glycoprotein N-terminal (Gn) to major histocompatibility complex class II compartment by fusing the antigen with lysosome-associated membrane protein 1 (LAMP1), which altered antigen presenting pathway and activated the CD4+ T cells. METHODS The segments of Gn and LAMP1 were cloned into vector pVAX1, and recombinant plasmid was constructed by inserting Gn sequence into LAMP1, between luminal and the transmembrane/cytoplasmic domains. Subsequently, the protein expression was identified through immunoprecipitation, western blot and Immunofluorescent assay. Adaptive immune responses were assessed by the presence of specific and neutralizing antibodies, interferon (ELISpot results, and cytotoxic T-lymphocyte (CTL) cytotoxicity. Epitope mapping was performed to study the T-cell epitopes. Protective immunity in vivo was evaluated using a novel HTNV-challenging model, and safety evaluation was based on histological and behavioral observations. RESULTS Native or LAMP1 targeting HTNV Gn was successfully identified. Humoral immune responses were enhanced, featuring with satisfying titers of specific and neutralizing antibody production. The boosted activities of IFN-γ and CTL cytotoxicity witnessed enhanced cellular immune responses. Effective protection against HTNV in vivo was conferred in all three vaccine groups by the challenge model. Safety was confirmed and one dominant T-cell epitope screened from immunized mice overlapped the specific T-cell hot spot in HFRS patients. CONCLUSION LAMP1 targeting strategy successfully enhanced the efficacy of HTNV Gn-based vaccine, which is highly immunogenic and safe, showing promise for immunoprophylaxis against HFRS. Further investigations are warranted in the future.
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MESH Headings
- Animals
- Antibodies, Neutralizing/blood
- Antibodies, Viral/blood
- Cytotoxicity Tests, Immunologic
- Disease Models, Animal
- Enzyme-Linked Immunosorbent Assay
- Enzyme-Linked Immunospot Assay
- Female
- Glycoproteins/genetics
- Glycoproteins/immunology
- Hantavirus Infections/immunology
- Hantavirus Infections/prevention & control
- Interferons/metabolism
- Lysosomal Membrane Proteins/genetics
- Lysosomal Membrane Proteins/immunology
- Mice, Inbred BALB C
- Neutralization Tests
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/immunology
- Survival Analysis
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/adverse effects
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/adverse effects
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Viral Proteins/genetics
- Viral Proteins/immunology
- Viral Vaccines/administration & dosage
- Viral Vaccines/adverse effects
- Viral Vaccines/genetics
- Viral Vaccines/immunology
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Affiliation(s)
- Dong-Bo Jiang
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China; Brigade of Cadet, Fourth Military Medical University, Xi'an 710032, China
| | - Yuan-Jie Sun
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China
| | - Lin-Feng Cheng
- Department of Microbiology, Fourth Military Medical University, Xi'an 710032, China
| | - Ge-Fei Zhang
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China; Brigade of Cadet, Fourth Military Medical University, Xi'an 710032, China
| | - Chen Dong
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China; Department of Microbiology, Fourth Military Medical University, Xi'an 710032, China
| | - Bo-Quan Jin
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China
| | - Chao-Jun Song
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China
| | - Ying Ma
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China
| | - Fang-Lin Zhang
- Department of Microbiology, Fourth Military Medical University, Xi'an 710032, China.
| | - Kun Yang
- Department of Immunology, Fourth Military Medical University, Xi'an 710032, China.
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15
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Ye W, Lei Y, Yu M, Xu Y, Cao M, Yu L, Zhang L, Li P, Bai W, Xu Z, Zhang F. NLRP3 inflammasome is responsible for Hantavirus inducing interleukin-1β in THP-1 cells. Int J Mol Med 2015; 35:1633-40. [PMID: 25847326 DOI: 10.3892/ijmm.2015.2162] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 03/18/2015] [Indexed: 11/05/2022] Open
Abstract
Persistent high fever is one typical clinical symptom of hemorrhagic fever with renal syndrome (HFRS) and circulating interleukin-1β (IL-1β) is elevated throughout HFRS. The mechanisms responsible for viral induction of IL-1β secretion are unknown. In the present study, Hantaan virus (HTNV) induced the secretion of IL-1β in the human monocytic cell line THP-1. Induction of IL-1β by HTNV relies on the activation of caspase-1. Small hairpin RNA knockdown in HTNV-infected THP-1 cells indicated that nucleotide-binding domain, leucine-rich repeat containing protein 3 (NLRP3) recruits the adaptor apoptosis-associated speck-like protein and caspase-1 to form an NLRP3 inflammasome complex, crucial for the induction of IL-1β. In HTNV-infected THP-1 cells, reactive oxygen species release, but not extracellular adenosine triphosphate, was crucial for IL-1β production. In conclusion, Hantavirus induces the formation of the NLRP3 inflammasome in THP-1 cells and this may be responsible for the elevated IL-1β levels in HFRS patients.
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Affiliation(s)
- Wei Ye
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Yingfeng Lei
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Mengmeng Yu
- Health Drug and Instrument Control, General Logistics Department of the Ministry, Beijing 100071, P.R. China
| | - Yongni Xu
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Mengyuan Cao
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Lan Yu
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Liang Zhang
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Puyuan Li
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Wentao Bai
- Department of Minimally Invasive Surgery, General Surgery Center, General Hospital of Chengdu Military Region, Chengdu, Sichuan 610083, P.R. China
| | - Zhikai Xu
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fanglin Zhang
- Department of Microbiology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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16
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Maity HK, Dey S, Mohan CM, Khulape SA, Pathak DC, Vakharia VN. Protective efficacy of a DNA vaccine construct encoding the VP2 gene of infectious bursal disease and a truncated HSP70 of Mycobacterium tuberculosis in chickens. Vaccine 2015; 33:1033-9. [PMID: 25596458 DOI: 10.1016/j.vaccine.2015.01.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 12/04/2014] [Accepted: 01/05/2015] [Indexed: 12/14/2022]
Abstract
Infectious bursal disease (IBD) is an acute, infectious, immunosuppressive disease affecting young chicken worldwide. The etiological agent IBD virus (IBDV) is a double stranded RNA virus with outer capsid protein VP2 of IBDV is the major antigenic determinant capable of inducing neutralizing antibody. DNA vaccines encoding VP2 has been extensively studied achieving only partial protection. However, the efficacy of DNA vaccines against IBDV can be augmented by choosing a potential molecular adjuvant. The goal of the present study is to evaluate the immune response and protective efficacy of a DNA vaccine encoding the C-terminal domain of the heat shock protein 70 (cHSP70) of Mycobacterium tuberculosis gene genetically fused with the full length VP2 gene of IBDV (pCIVP2-cHSP70) in comparison to a 'DNA prime-protein boost' approach and a DNA vaccine encoding the VP2 gene (pCIVP2) alone. The results indicate that both pCIVP2-cHSP70 and 'DNA prime-protein boost' elicited humoral as well as cellular immune responses. Chickens in the pCIVP2-cHSP70 and 'DNA prime-protein boost' groups developed significantly higher levels of ELISA titer to IBDV antigen compared to the group immunized with pCIVP2 alone (p<0.01). However, significantly higher levels of lymphocyte proliferative response, IL-12 and IFN-γ production were found in the pCIVP2-cHSP70 group compared to 'DNA prime-protein boost' group. Additionally, chickens immunized with pCIVP2-cHSP70 and 'DNA prime-protein boost' vaccines were completely protected against the vvIBDV whereas pCIVP2 DNA vaccine alone was able to protect only 70%. These findings suggest that the truncated C-terminal HSP70 mediated DNA vaccine genetically fused with the VP2 gene construct stimulated both humoral and cell mediated immune responses and conferred complete protection against IBDV. This novel strategy is perhaps a seminal concept in utilizing HSP70 as an adjuvant molecule to elicit an immune response against IBD affecting chickens.
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Affiliation(s)
- Hemanta Kumar Maity
- Recombinant DNA Lab, Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly 243 122, India
| | - Sohini Dey
- Recombinant DNA Lab, Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly 243 122, India.
| | - C Madhan Mohan
- Recombinant DNA Lab, Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly 243 122, India
| | - Sagar A Khulape
- Recombinant DNA Lab, Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly 243 122, India
| | - Dinesh C Pathak
- Recombinant DNA Lab, Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly 243 122, India
| | - Vikram N Vakharia
- Department of Marine Biotechnology, University of Maryland, Baltimore County, 701, East Pratt Street, Baltimore, MD 21202, USA
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17
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Hantaan virus can infect human keratinocytes and activate an interferon response through the nuclear translocation of IRF-3. INFECTION GENETICS AND EVOLUTION 2015; 29:146-55. [DOI: 10.1016/j.meegid.2014.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 11/09/2014] [Accepted: 11/11/2014] [Indexed: 12/11/2022]
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