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Duan S, Zhang W, Li Y, Li Y, Zhao Y, Jin W, Liu Q, Li M, Sun W, Chen L, Xu H, Tang J, Hou J, Deng Z, Yang F, Ma S, He Z. Coxsackievirus B3 HFMD animal models in Syrian hamster and rhesus monkey. Virol Sin 2024; 39:290-300. [PMID: 38331038 DOI: 10.1016/j.virs.2024.02.001] [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: 05/05/2023] [Accepted: 01/31/2024] [Indexed: 02/10/2024] Open
Abstract
Coxsackievirus B3 (CVB3) is the pathogen causing hand, foot and mouth disease (HFMD), which manifests across a spectrum of clinical severity from mild to severe. However, CVB3-infected mouse models mainly demonstrate viral myocarditis and pancreatitis, failing to replicate human HFMD symptoms. Although several enteroviruses have been evaluated in Syrian hamsters and rhesus monkeys, there is no comprehensive data on CVB3. In this study, we have first tested the susceptibility of Syrian hamsters to CVB3 infection via different routes. The results showed that Syrian hamsters were successfully infected with CVB3 by intraperitoneal injection or nasal drip, leading to nasopharyngeal colonization, acute severe pathological injury, and typical HFMD symptoms. Notably, the nasal drip group exhibited a longer viral excretion cycle and more severe pathological damage. In the subsequent study, rhesus monkeys infected with CVB3 through nasal drips also presented signs of HFMD symptoms, viral excretion, serum antibody conversion, viral nucleic acids and antigens, and the specific organ damages, particularly in the heart. Surprisingly, there were no significant differences in myocardial enzyme levels, and the clinical symptoms resembled those often associated with common, mild infections. In summary, the study successfully developed severe Syrian hamsters and mild rhesus monkey models for CVB3-induced HFMD. These models could serve as a basis for understanding the disease pathogenesis, conducting pre-trial prevention and evaluation, and implementing post-exposure intervention.
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Affiliation(s)
- Suqin Duan
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Wei Zhang
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Yongjie Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Yanyan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Yuan Zhao
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Weihua Jin
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Quan Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Mingxue Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Wenting Sun
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Lixiong Chen
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Hongjie Xu
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Jie Tang
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Jinghan Hou
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Zijun Deng
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China
| | - Fengmei Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China.
| | - Shaohui Ma
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China.
| | - Zhanlong He
- Institute of Medical Biology, Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, China.
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Song JM. Experimental animal models for development of human enterovirus vaccine. Clin Exp Vaccine Res 2023; 12:291-297. [PMID: 38025911 PMCID: PMC10655152 DOI: 10.7774/cevr.2023.12.4.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 08/26/2023] [Accepted: 08/26/2023] [Indexed: 12/01/2023] Open
Abstract
Enterovirus infections induce infectious diseases in young children, such as hand, foot, and mouth disease which is characterized by highly contagious rashes or blisters around the hands, feet, buttocks, and mouth. This predominantly arises from enterovirus A71 or coxsackievirus A16 infections and in severe cases, they can lead to encephalitis, paralysis, pulmonary edema, or even fatality, representing a global health threat. Due to the absence of effective therapeutic strategies for these infections, various experimental animal models are being investigated for the development of vaccines. During the early stages of research on enterovirus infections, non-human primate infections exhibited symptoms like those in humans, leading to their utilization as model animals. However, due to economic and ethical considerations, their current usage is limited. While enterovirus infections do not readily occur in mice, an infection model with mouse-adapted strain in neonatal mice has been employed. Cellular receptors have been identified in human cells, and genetically modified mice expressing these receptors have been used. Most recently, the utilization of Mongolian gerbil model is actively being considered and should be pursued for further animal model development. So, herein, we provide a summarized overview of the current portfolio of available enterovirus infection models, emphasizing their respective advantages and limitations.
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Affiliation(s)
- Jae Min Song
- School of Biopharmaceutical and Medical Sciences, Sungshin Women’s University, Seoul, Korea
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3
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Coxsackievirus A6 Infection Causes Neurogenic Pathogenesis in a Neonatal Murine Model. Viruses 2023; 15:v15020511. [PMID: 36851724 PMCID: PMC9960737 DOI: 10.3390/v15020511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/03/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023] Open
Abstract
Coxsackievirus A6 (CVA6), a member of species A enterovirus, is associated with outbreaks of hand-foot-and-mouth disease and causes a large nationwide burden of disease. However, the molecular pathogenesis of CVA6 remains unclear. In the present study, we established a suckling Institute of Cancer Research (ICR) mouse infection model to explore the neural pathogenicity of CVA6. Five-day-old mice infected with CVA6 strain F219 showed lethargy and paralysis, and died 5 or 6 days after infection via IM injection. Cerebral edema and neuronal cell swelling were observed in the infected brain tissue, and we found that the CVA6 VP1 antigen could co-localize with GFAP-positive astrocytes in infected mouse brain using an immunofluorescence assay. CVA6 strain F219 can also infect human glioma (U251) cells. Transcriptome analysis of brain tissues from infected mice and infected U251 cells showed that significantly differentially expressed genes were enriched in antiviral and immune response and neurological system processes. These results indicate that CVA6 could cause neural pathogenesis and provide basic data for exploring the mechanism of how host-cell interactions affect viral replication and pathogenesis. Importance: Coxsackievirus A6 (CVA6) surpasses the two main pathogens, enterovirus 71 (EV-A71) and coxsackievirus A16 (CVA16), which are the leading pathogens causing HFMD in many provinces of China. In our study, CVA6 infection caused neurogenic pathogenesis in a neonatal murine model, manifesting as cerebral edema and neuronal cell swelling, CVA6 VP1 antigen could co-localize with GFAP-positive astrocytes in the infected mouse brain. Based on CVA6-infected brain tissue and U251 cell transcriptome analysis, we found upregulated antiviral and immune response-related genes such as Zbp1, Usp18, Oas2, Irf7, Ddx60, Ifit3, Ddx58, and Isg15, while the neurological system process-related genes were downregulated, including Fcrls, Ebnrb, Cdk1, and Anxa5.
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Xing J, Wang K, Wang G, Li N, Zhang Y. Recent advances in enterovirus A71 pathogenesis: a focus on fatal human enterovirus A71 infection. Arch Virol 2022; 167:2483-2501. [PMID: 36171507 DOI: 10.1007/s00705-022-05606-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 08/05/2022] [Indexed: 12/14/2022]
Abstract
Enterovirus A71 (EV-A71) is one of the major pathogens responsible for hand, foot, and mouth disease (HFMD). Many HFMD outbreaks have been reported throughout the world in the past decades. Compared with other viruses, EV-A71 infection is more frequently associated with severe neurological complications and even death in children. EV-A71 can also infect adults and cause severe complications and death, although such cases are very uncommon. Although fatal cases of EV-A71 infection have been reported, the underlying mechanisms of EV-A71 infection, especially the mode of viral spread into the central nervous system (CNS) and mechanisms of pulmonary edema, which is considered to be the direct cause of death, have not yet been fully clarified, and more studies are needed. Here, we first summarize the pathological findings in various systems of patients with fatal EV-A71 infections, focussing in detail on gross changes, histopathological examination, tissue distribution of viral antigens and nucleic acids, systemic inflammatory cell infiltration, and tissue distribution of viral receptors and their co-localization with viral antigens. We then present our conclusions about viral dissemination, neuropathogenesis, and the mechanism of pulmonary edema in EV-A71 infection, based on pathological findings.
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Affiliation(s)
- Jingjun Xing
- Zhejiang Key Laboratory of Pathophysiology, School of Basic Medical Science, School of Medicine, Ningbo University, No. 818 Fenghua Road, Jiangbei District, Ningbo, 315211, Zhejiang Province, P. R. China
| | - Ke Wang
- The Affiliated Hospital of Medical School, Ningbo University, No. 247 Renmin Road, Jiangbei District, Ningbo, 315020, Zhejiang Province, P. R. China
| | - Geng Wang
- Zhejiang Key Laboratory of Pathophysiology, School of Basic Medical Science, School of Medicine, Ningbo University, No. 818 Fenghua Road, Jiangbei District, Ningbo, 315211, Zhejiang Province, P. R. China
| | - Na Li
- Zhejiang Key Laboratory of Pathophysiology, School of Basic Medical Science, School of Medicine, Ningbo University, No. 818 Fenghua Road, Jiangbei District, Ningbo, 315211, Zhejiang Province, P. R. China
| | - Yanru Zhang
- Zhejiang Key Laboratory of Pathophysiology, School of Basic Medical Science, School of Medicine, Ningbo University, No. 818 Fenghua Road, Jiangbei District, Ningbo, 315211, Zhejiang Province, P. R. China.
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Allegra A, Mirabile G, Ettari R, Pioggia G, Gangemi S. The Impact of Curcumin on Immune Response: An Immunomodulatory Strategy to Treat Sepsis. Int J Mol Sci 2022; 23:ijms232314710. [PMID: 36499036 PMCID: PMC9738113 DOI: 10.3390/ijms232314710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/12/2022] [Accepted: 11/22/2022] [Indexed: 11/27/2022] Open
Abstract
Primary and secondary immunodeficiencies cause an alteration in the immune response which can increase the rate of infectious diseases and worsened prognoses. They can also alter the immune response, thus, making the infection even worse. Curcumin is the most biologically active component of the turmeric root and appears to be an antimicrobial agent. Curcumin cooperates with various cells such as macrophages, dendritic cells, B, T, and natural killer cells to modify the body's defence capacity. Curcumin also inhibits inflammatory responses by suppressing different metabolic pathways, reduces the production of inflammatory cytokines, and increases the expression of anti-inflammatory cytokines. Curcumin may also affect oxidative stress and the non-coding genetic material. This review analyses the relationships between immunodeficiency and the onset of infectious diseases and discusses the effects of curcumin and its derivatives on the immune response. In addition, we analyse some of the preclinical and clinical studies that support its possible use in prophylaxis or in the treatment of infectious diseases. Lastly, we examine how nanotechnologies can enhance the clinical use of curcumin.
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Affiliation(s)
- Alessandro Allegra
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood “Gaetano Barresi”, University of Messina, 98125 Messina, Italy
- Correspondence:
| | - Giuseppe Mirabile
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood “Gaetano Barresi”, University of Messina, 98125 Messina, Italy
| | - Roberta Ettari
- Department of Chemical, Biological, Pharmaceutical and Environmental Chemistry, University of Messina, 98100 Messina, Italy
| | - Giovanni Pioggia
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), 98164 Messina, Italy
| | - Sebastiano Gangemi
- Allergy and Clinical Immunology Unit, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy
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6
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Zhang G, Li J, Sun Q, Zhang K, Xu W, Zhang Y, Wu G. Pathological Features of Echovirus-11-Associated Brain Damage in Mice Based on RNA-Seq Analysis. Viruses 2021; 13:v13122477. [PMID: 34960747 PMCID: PMC8707869 DOI: 10.3390/v13122477] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/07/2021] [Accepted: 12/07/2021] [Indexed: 01/22/2023] Open
Abstract
Echovirus 11 (E11) is a neurotropic virus that occasionally causes fatal neurological diseases in infected children. However, the molecular mechanism underlying the disease and pathological spectrum of E11 infection remains unclear. Therefore, we modelled E11 infection in 2-day-old type I interferon receptor knockout (IFNAR−/−) mice, which are susceptible to enteroviruses, with E11, and identified symptoms consistent with the clinical signs observed in human cases. All organs of infected suckling mice were found to show viral replication and pathological changes; the muscle tissue showed the highest viral replication, whereas the brain and muscle tissues showed the most obvious pathological changes. Brain tissues showed oedema and a large number of dead nerve cells; RNA-Seq analysis of the brain and hindlimb muscle tissues revealed differentially expressed genes to be abundantly enriched in immune response-related pathways, with changes in the Guanylate-binding protein (GBP) and MHC class genes, causing aseptic meningitis-related symptoms. Furthermore, human glioma U251 cell was identified as sensitive target cells for E11 infection. Overall, these results provide new insights into the pathogenesis and progress of aseptic meningitis caused by E11.
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MESH Headings
- Animals
- Animals, Newborn
- Brain/metabolism
- Brain/pathology
- Brain/virology
- Cell Line, Tumor
- Disease Models, Animal
- Echovirus Infections/genetics
- Echovirus Infections/pathology
- Echovirus Infections/virology
- Enterovirus B, Human/physiology
- Humans
- Meningitis, Aseptic/genetics
- Meningitis, Aseptic/pathology
- Meningitis, Aseptic/virology
- Mice
- Mice, Knockout
- Muscle, Skeletal/pathology
- Muscle, Skeletal/virology
- RNA-Seq
- Receptor, Interferon alpha-beta/genetics
- Transcriptome
- Viral Load
- Virus Replication
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Affiliation(s)
- Guoyan Zhang
- WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China; (G.Z.); (J.L.); (Q.S.); (K.Z.); (W.X.)
- Biosafety Level-3 Laboratory, National Health Commission Key Laboratory for Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China
| | - Jichen Li
- WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China; (G.Z.); (J.L.); (Q.S.); (K.Z.); (W.X.)
- Department of Medical Microbiology, Weifang Medical University, Weifang 261053, China
| | - Qiang Sun
- WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China; (G.Z.); (J.L.); (Q.S.); (K.Z.); (W.X.)
| | - Keyi Zhang
- WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China; (G.Z.); (J.L.); (Q.S.); (K.Z.); (W.X.)
- Biosafety Level-3 Laboratory, National Health Commission Key Laboratory for Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China
| | - Wenbo Xu
- WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China; (G.Z.); (J.L.); (Q.S.); (K.Z.); (W.X.)
- Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, China
| | - Yong Zhang
- WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China; (G.Z.); (J.L.); (Q.S.); (K.Z.); (W.X.)
- Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, China
- Correspondence: (Y.Z.); (G.W.); Tel.: +86-58-900-183 (Y.Z.); +86-58-900-656 (G.W.)
| | - Guizhen Wu
- Biosafety Level-3 Laboratory, National Health Commission Key Laboratory for Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Beijing 102206, China
- Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, China
- Correspondence: (Y.Z.); (G.W.); Tel.: +86-58-900-183 (Y.Z.); +86-58-900-656 (G.W.)
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Immunological evaluation of an inactivated SARS-CoV-2 vaccine in rhesus macaques. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2021; 23:108-118. [PMID: 34462721 PMCID: PMC8387130 DOI: 10.1016/j.omtm.2021.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 08/10/2021] [Indexed: 12/05/2022]
Abstract
Because of the relatively limited understanding of coronavirus disease 2019 (COVID-19) pathogenesis, immunological analysis for vaccine development is needed. Mice and macaques were immunized with an inactivated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine prepared by two inactivators. Various immunological indexes were tested, and viral challenges were performed on day 7 or 150 after booster immunization in monkeys. This inactivated SARS-CoV-2 vaccine was produced by sequential inactivation with formaldehyde followed by propiolactone. The various antibody responses and specific T cell responses to different viral antigens elicited in immunized animals were maintained for longer than 150 days. This comprehensive immune response could effectively protect vaccinated macaques by inhibiting viral replication in macaques and substantially alleviating immunopathological damage, and no clinical manifestation of immunopathogenicity was observed in immunized individuals during viral challenge. This candidate inactivated vaccine was identified as being effective against SARS-CoV-2 challenge in rhesus macaques.
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Yoshida S, Inaba H, Nomura R, Murakami M, Yasuda H, Nakano K, Matsumoto-Nakano M. Efficacy of FimA antibody and clindamycin in silkworm larvae stimulated with Porphyromonas gulae. J Oral Microbiol 2021; 13:1914499. [PMID: 33968314 PMCID: PMC8079003 DOI: 10.1080/20002297.2021.1914499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Objective: Porphyromonas gulae, a major periodontal pathogen in animals, possesses fimbriae that have been classified into three genotypes (A, B, C) based on the diversity of fimA genes encoding fimbrillin protein (FimA). P. gulae strains with type C fimbriae were previously shown to be more virulent than other types. In this study, we further examined the host toxicity mediated by P. gulae fimbriae by constructing recombinant FimA (rFimA) expression vectors for each genotype and raised antibodies to the purified proteins. Methods and Results: All larvae died within 204 h following infection with P. gulae type C at the low-dose infection, whereas type A and B did not. Among fimA types, the survival rates of the larvae injected with rFimA type C were remarkably decreased, while the survival rates of the larvae injected with rFimA type A and type B were greater than 50%. Clindamycin treatment inhibited the growth of type C strains in a dose-dependent manner, resulting in an increased rate of silkworm survival. Finally, type C rFimA-specific antiserum prolonged the survival of silkworm larvae stimulated by infection with P. gulae type C strain or injection of rFimA type C protein. Conclusion: These results suggested that type C fimbriae have high potential for enhancement of bacterial pathogenesis, and that both clindamycin and anti-type C rFimA-specific antibodies are potent inhibitors of type C fimbriae-induced toxicity. This is the first report to establish a silkworm infection model using P. gulae for toxicity assessment.
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Affiliation(s)
- Sho Yoshida
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiroaki Inaba
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Ryota Nomura
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Masaru Murakami
- Departments of Pharmacology, Veterinary Public Health II and Molecular Biology, School of Veterinary Medicine, Azabu University, Kanagawa, Japan
| | | | - Kazuhiko Nakano
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Michiyo Matsumoto-Nakano
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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From Monovalent to Multivalent Vaccines, the Exploration for Potential Preventive Strategies Against Hand, Foot, and Mouth Disease (HFMD). Virol Sin 2020; 36:167-175. [PMID: 32997323 PMCID: PMC7525078 DOI: 10.1007/s12250-020-00294-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022] Open
Abstract
Hand, foot, and mouth disease (HFMD) recently emerged as a global public threat. The licensure of inactivated enterovirus A71 (EV-A71) vaccine was the first step in using a vaccine to control HFMD. New challenges arise from changes in the pathogen spectrum while vaccines directed against other common serotypes are in the preclinical stage. The mission of a broad-spectrum prevention strategy clearly favors multivalent vaccines. The development of multivalent vaccines was attempted via the simple combination of potent monovalent vaccines or the construction of chimeric vaccines comprised of epitopes derived from different virus serotypes. The present review summarizes recent advances in HFMD vaccine development and discusses the next steps toward a safe and effective HFMD vaccine that is capable of establishing a cross-protective antibody response.
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10
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Hooi YT, Ong KC, Tan SH, Perera D, Wong KT. A novel orally infected hamster model for Coxsackievirus A16 hand-foot-and-mouth disease and encephalomyelitis. J Transl Med 2020; 100:1262-1275. [PMID: 32601355 DOI: 10.1038/s41374-020-0456-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 06/06/2020] [Accepted: 06/11/2020] [Indexed: 12/26/2022] Open
Abstract
Coxsackievirus A16 (CV-A16) is one of the major causes of mild and self-limiting hand-foot-and-mouth disease (HFMD) in young children, which may occasionally leads to serious neurological complications. In this study, we had developed a novel, consistent, orally infected CV-A16 HFMD hamster model with encephalomyelitis. Four groups of 7-day-old hamsters in a kinetic study were orally infected with mouse-adapted CV-A16 strains and sacrificed at 1-4 days post infection (dpi), respectively. Tissues were studied by light microscopy, immunohistochemistry to detect viral antigens, in situ hybridization to detect viral RNA, and by viral titration. In a separate transmission experiment, orally infected index hamsters were housed together with contact hamsters to investigate oral and fecal viral shedding by virus culture and reverse transcription polymerase chain reaction (RT-PCR). At severe infection/death endpoints, index and contact hamster infection were also histopathologically analyzed. In the kinetic study, infected hamsters developed signs of infection at 4 dpi. Viral antigens/RNA were localized to brainstem (medulla/pons; reticular formation and motor trigeminal nucleus) and spinal cord anterior horn neurons, oral squamous epithelia and epidermis from 3 to 4 dpi. Salivary and lacrimal glands, myocardium, brown adipose tissue, intestinal smooth muscle, and skeletal muscle infection was also demonstrated. Viremia at 1 dpi and increasing viral titers in various tissues were observed from 2 dpi. In the transmission study, all contact hamsters developed disease 3-5 days later than index hamsters, but demonstrated similar histopathological findings at endpoint. Viral culture and RT-PCR positive oral washes and feces confirmed viral shedding. Our hamster model, orally infected by the natural route for human infection, confirmed CV-A16 neurotropism and demonstrated squamous epitheliotropism reminiscent of HFMD, attributes not found in other animal models. It should be useful to investigate neuropathogenesis, model person-to-person transmission, and for testing antiviral drugs and vaccines.
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Affiliation(s)
- Yuan Teng Hooi
- Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kien Chai Ong
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Soon Hao Tan
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - David Perera
- Institute of Health & Community Medicine, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
| | - Kum Thong Wong
- Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
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11
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Chen C, Xia Y, Zhu S, Xu F, Sun Y, Lu H, Gao M, Yang Z, Mao Z, Ge Q, Miao Z, Zhu H, Yao P. Muscle destruction caused by coxsackievirus A10 in gerbils: Construction of a novel animal model for antiviral evaluation. Virus Res 2020; 286:198067. [PMID: 32553610 DOI: 10.1016/j.virusres.2020.198067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/13/2020] [Accepted: 06/13/2020] [Indexed: 12/20/2022]
Abstract
The morbidity and mortality of coxsackievirus A10 (CVA10)-associated hand, foot, and mouth disease (HFMD) have been increasing in recent years, while few studies on the vaccine and animal model of CVA10 have been reported. Here, we first established a CVA10-infected gerbil model and employed it to evaluate the immunoprotective effect of an inactivated CVA10 vaccine. The results showed that gerbils up to the age of 14 days were fully susceptible to CVA10, and all died within five days post-infection by intraperitoneal inoculation. Lethargy, wasting, hind-limb paralysis, and even death could be observed in the CVA10-infected gerbils. Pathological examination suggested that CVA10 has a strong tropism toward muscle tissue, and muscle bundle fracture and muscular fibers necrosis were observed in the limb muscles. Additionally, active immunization results showed that gerbils immunized with the inactivated CVA10 vaccine were 100 % protected from lethal CVA10 challenge. The antisera from vaccinated gerbils also showed high neutralizing titers against CVA10. Based on these results, the CVA10-infected gerbil model was a suitable tool for analyzing the pathogenesis of CVA10 and assessing the protective efficacy of CVA10 candidate vaccines.
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Affiliation(s)
- Chen Chen
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Yong Xia
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Shuirong Zhu
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Fang Xu
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Yisheng Sun
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Hangjing Lu
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Meng Gao
- Zhejiang Pukang Biotechnology Co., LTD., Hangzhou, China
| | - Zhangnv Yang
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Zian Mao
- Zhejiang Pukang Biotechnology Co., LTD., Hangzhou, China
| | - Qiong Ge
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Ziping Miao
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - HanPing Zhu
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
| | - Pingping Yao
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
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12
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Hooi YT, Ong KC, Tan SH, Perera D, Wong KT. Coxsackievirus A16 in a 1-Day-Old Mouse Model of Central Nervous System Infection Shows Lower Neurovirulence than Enterovirus A71. J Comp Pathol 2020; 176:19-32. [PMID: 32359633 DOI: 10.1016/j.jcpa.2020.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/28/2020] [Accepted: 02/03/2020] [Indexed: 02/06/2023]
Abstract
Coxsackievirus A16 (CV-A16) and enterovirus A71 (EV-A71) are the major causes of hand, foot and mouth disease in young children. Although less so with CV-A16, both viruses are associated with serious neurological syndromes, but the differences between their central nervous system infections remain unclear. We conducted a comparative infection study using clinically-isolated CV-A16 and EV-A71 strains in a 1-day-old mouse model to better understand the neuropathology and neurovirulence of the viruses. New serotype-specific probes for in situ hybridization were developed and validated to detect CV-A16 and EV-A71 RNA in infected tissues. Demonstration of CV-A16 virus antigens/RNA, mainly in the brainstem and spinal cord neurons, confirmed neurovirulence, but showed lower densities than in EV-A71 infected animals. A higher lethal dose50 for CV-A16 suggested that CV-A16 is less neurovirulent. Focal virus antigens/RNA in the anterior horn white matter and adjacent efferent motor nerves suggested that neuroinvasion is possibly via retrograde axonal transport in peripheral motor nerves.
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Affiliation(s)
- Y T Hooi
- Department of Pathology, University of Malaya, Kuala Lumpur, Malaysia
| | - K C Ong
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - S H Tan
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - D Perera
- Institute of Health and Community Medicine, Universiti Malaysia Sarawak, Sarawak, Malaysia
| | - K T Wong
- Department of Pathology, University of Malaya, Kuala Lumpur, Malaysia.
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13
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Zhang Z, Zhang X, Carr MJ, Zhou H, Li J, Liu S, Liu T, Xing W, Shi W. A neonatal murine model of coxsackievirus A4 infection for evaluation of vaccines and antiviral drugs. Emerg Microbes Infect 2020; 8:1445-1455. [PMID: 31595827 PMCID: PMC6792045 DOI: 10.1080/22221751.2019.1673135] [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] [Indexed: 12/13/2022]
Abstract
Coxsackievirus A4 (CVA4) infection can cause hand, foot and mouth disease (HFMD), an epidemic illness affecting neonatal and paediatric cohorts, which can develop to severe neurological disease with high mortality. In this study, we established the first ICR mouse model of CVA4 infection for the evaluation of inactivated vaccines and antiviral drug screening. The CVA4 YT226R strain was selected to infect the neonatal mice and three infectious factors were optimized to establish the infection model. The 3-day-old neonatal mice exhibited clinical symptoms such as hind limb paralysis and death. The severe inflammatory reactions were closely related to the abnormal expression of the acute phase response proinflammatory cytokine IL-6 and an imbalance in the IFN-γ/IL-4 ratio. Importantly, the inactivated CVA4 whole-virus vaccine induced humoral immune responses in adult females and the maternal antibodies afforded mice complete protection against lethal dose challenges of homologous or heterologous CVA4 strains. Both IFN-α2a and antiserum inhibited the replication of CVA4 and increased the survival rates of neonatal mice during the early stages of infection. This neonatal murine model of CVA4 infection will be useful for the development of prophylactic and therapeutic vaccines and for screening of antiviral drugs targeting CVA4 to decrease morbidity and mortality.
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Affiliation(s)
- Zhenjie Zhang
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
| | - Xingcheng Zhang
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China.,School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
| | - Michael J Carr
- National Virus Reference Laboratory, School of Medicine, University College Dublin , Dublin , Ireland.,Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University , Sapporo , Japan
| | - Hong Zhou
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
| | - Juan Li
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
| | - Shaoqiong Liu
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
| | - Tao Liu
- Department of Obstetrics and Gynecology, Central Hospital of Taian , Taian , People's Republic of China
| | - Weijia Xing
- School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
| | - Weifeng Shi
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences , Taian , People's Republic of China
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14
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Mechanism for the lethal effect of enterovirus A71 intracerebral injection in neonatal mice. J Transl Med 2020; 100:596-605. [PMID: 31857694 PMCID: PMC7096333 DOI: 10.1038/s41374-019-0351-5] [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: 03/20/2019] [Revised: 10/31/2019] [Accepted: 11/03/2019] [Indexed: 11/09/2022] Open
Abstract
Enterovirus A71 (EV-A71) infection is primarily responsible for fatal hand, foot, and mouth disease (HFMD) cases. Infants and younger children are more likely to suffer central nervous system damage as a result of EV-A71 infection, but this virus mostly does not affect older children and adults. This study investigated the possible mechanism underlying the age-dependent lethal effect of EV-A71 infection by comparing neonatal and adult mouse models of EV-A71 infection. Although viral proliferation is absent in both neonatal and adult mice, we observed that EV-A71, as a stimulus for astrocytes, elevates the levels of cytokines and monoamine neurotransmitters in neonatal mice. Then, we selected IL-6 and adrenaline as targets in a pharmacological approach to further validate the roles of these factors in mediating the mortality of neonatal mice after EV-A71 infection. Intracerebral injection of IL-6 and adrenaline enhanced the severity of EV-A71 infection, while treatment with an anti-IL-6-neutralizing antibody or the adrenergic-antagonist phenoxybenzamine reversed the lethal effect of EV-A71 in neonatal mice. These results suggest that the central nervous system (CNS) damage in neonatal cases of EV-A71 infection might be caused by an activated fetal cerebral immune response to the virus, including the disruption of brainstem function through increased levels of cytokines and neurotransmitters, rather than the typical cytopathic effect (CPE) of viral infection.
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15
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Sun YS, Yang ZN, Xu F, Chen C, Lu HJ, Jiang JM, Zhang YJ, Zhu HP, Yao PP. Global Gene Expression Analysis of the Brainstem in EV71- and CVA16-Infected Gerbils. Viruses 2019; 12:v12010046. [PMID: 31906004 PMCID: PMC7019476 DOI: 10.3390/v12010046] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/16/2019] [Accepted: 12/26/2019] [Indexed: 12/16/2022] Open
Abstract
Enterovirus 71 (EV71) and coxsackievirus A16 (CVA16) are the two most important pathogens of hand, foot, and mouth disease (HFMD). However, the neuropathogenesis of EV71 and CVA16 has not been elucidated. In our previous study, we established gerbils as a useful model for both EV71 and CVA16 infection. In this work, we used RNA-seq technology to analyze the global gene expression of the brainstem of EV71- and CVA16-infected gerbils. We found that 3434 genes were upregulated while 916 genes were downregulated in EV71-infected gerbils. In CVA16-infected gerbils, 1039 genes were upregulated, and 299 genes were downregulated. We also found significant dysregulation of cytokines, such as IP-10 and CXCL9, in the brainstem of gerbils. The expression levels of 10 of the most upregulated genes were confirmed by real-time RT-PCR, and the upregulated tendency of most genes was in accordance with the differential gene expression (DGE) results. Our work provided global gene expression analysis of virus-infected gerbils and laid a solid foundation for elucidating the neuropathogenesis mechanisms of EV71 and CVA16.
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Affiliation(s)
| | | | | | | | | | | | | | - Han-Ping Zhu
- Correspondence: (H.-P.Z.); (P.-P.Y.); Tel.: +86-571-8711-5316 (H.-P.Z.); +86-571-8711-5312 (P.-P.Y.)
| | - Ping-Ping Yao
- Correspondence: (H.-P.Z.); (P.-P.Y.); Tel.: +86-571-8711-5316 (H.-P.Z.); +86-571-8711-5312 (P.-P.Y.)
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16
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Li H, Li H, Wang J, Guo L, Fan H, Zheng H, Yang Z, Huang X, Chu M, Yang F, He Z, Li N, Yang J, Wu Q, Shi H, Liu L. The altered gut virome community in rhesus monkeys is correlated with the gut bacterial microbiome and associated metabolites. Virol J 2019; 16:105. [PMID: 31426820 PMCID: PMC6700990 DOI: 10.1186/s12985-019-1211-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 08/05/2019] [Indexed: 12/13/2022] Open
Abstract
Background The gut microbiome is closely associated with the health of the host; although the interaction between the bacterial microbiome and the whole virome has rarely been studied, it is likely of medical importance. Examination of the interactions between the gut bacterial microbiome and virome of rhesus monkey would significantly contribute to revealing the gut microbiome composition. Methods Here, we conducted a metagenomic analysis of the gut microbiome of rhesus monkeys in a longitudinal cohort treated with an antibiotic cocktail, and we documented the interactions between the bacterial microbiome and virome. The depletion of viral populations was confirmed at the species level by real-time PCR. We also detected changes in the gut metabolome by GC-MS and LC-MS. Results A majority of bacteria were depleted after treatment with antibiotics, and the Shannon diversity index decreased from 2.95 to 0.22. Furthermore, the abundance-based coverage estimator (ACE) decreased from 104.47 to 33.84, and the abundance of eukaryotic viruses also changed substantially. In the annotation, 6 families of DNA viruses and 1 bacteriophage family were present in the normal monkeys but absent after gut bacterial microbiome depletion. Intriguingly, we discovered that changes in the gut bacterial microbiome composition may promote changes in the gut virome composition, and tryptophan, arginine, and quinone may play roles in the interaction between the bacterial microbiome and virome. Conclusion Our results indicated that the clearly altered composition of the virome was correlated with depletion in the bacterial community and that metabolites produced by bacteria possibly play important roles in the interaction. Electronic supplementary material The online version of this article (10.1186/s12985-019-1211-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Heng Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Hongzhe Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Jingjing Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Lei Guo
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Haitao Fan
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Huiwen Zheng
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Zening Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Xing Huang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Manman Chu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Fengmei Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China
| | - Zhanlong He
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China
| | - Nan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Jinxi Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Qiongwen Wu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China.,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China
| | - Haijing Shi
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China. .,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China.
| | - Longding Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming, 650118, China. .,Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming, China.
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17
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Wells AI, Coyne CB. Enteroviruses: A Gut-Wrenching Game of Entry, Detection, and Evasion. Viruses 2019; 11:E460. [PMID: 31117206 PMCID: PMC6563291 DOI: 10.3390/v11050460] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/08/2019] [Accepted: 05/19/2019] [Indexed: 12/13/2022] Open
Abstract
Enteroviruses are a major source of human disease, particularly in neonates and young children where infections can range from acute, self-limited febrile illness to meningitis, endocarditis, hepatitis, and acute flaccid myelitis. The enterovirus genus includes poliovirus, coxsackieviruses, echoviruses, enterovirus 71, and enterovirus D68. Enteroviruses primarily infect by the fecal-oral route and target the gastrointestinal epithelium early during their life cycles. In addition, spread via the respiratory tract is possible and some enteroviruses such as enterovirus D68 are preferentially spread via this route. Once internalized, enteroviruses are detected by intracellular proteins that recognize common viral features and trigger antiviral innate immune signaling. However, co-evolution of enteroviruses with humans has allowed them to develop strategies to evade detection or disrupt signaling. In this review, we will discuss how enteroviruses infect the gastrointestinal tract, the mechanisms by which cells detect enterovirus infections, and the strategies enteroviruses use to escape this detection.
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Affiliation(s)
- Alexandra I Wells
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
- Center for Microbial Pathogenesis, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Carolyn B Coyne
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
- Center for Microbial Pathogenesis, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA.
- Richard K. Mellon Institute for Pediatric Research, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA.
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18
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Lim PY, Cardosa MJ. Development of a sandwich ELISA to detect virus-like-particles in enterovirus A71 vaccines. J Virol Methods 2019; 270:113-119. [PMID: 31100287 DOI: 10.1016/j.jviromet.2019.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 02/14/2019] [Accepted: 05/13/2019] [Indexed: 01/04/2023]
Abstract
The goal of this paper was to develop a sandwich ELISA that can detect intact human enterovirus A71 (EV-A71) virus-like particles (VLPs) in vaccines. This assay specifically detected EV-A71 viruses from different sub-genogroups as well as EV-A71 VLPs, and treatment of VLPs with high heat and low pH reduced or completely abolished detection of the VLPs suggesting that the ELISA detected assembled particles. Using a purified VLP as a reference standard, a quantitative sandwich ELISA (Q-ELISA) was established which was used to monitor the yield and purity of the VLPs during manufacturing. Coupled with immunogenicity studies, the Q-ELISA was used to evaluate the performance of the VLPs and formalin-inactivated EV-A71 vaccine. This assay has the potential to play an important role in the development of an efficient process to produce and purify the VLPs and in examining the quality of EV-A71 vaccines.
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Affiliation(s)
- Pei-Yin Lim
- Sentinext Therapeutics Sdn Bhd, Suite 12A, Level 12, Menara Northam, 55 Jalan Sultan Ahmad Shah, Penang, 10050, Malaysia.
| | - Mary Jane Cardosa
- Sentinext Therapeutics Sdn Bhd, Suite 12A, Level 12, Menara Northam, 55 Jalan Sultan Ahmad Shah, Penang, 10050, Malaysia
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19
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Zhu J, Chen N, Zhou S, Zheng K, Sun L, Zhang Y, Cao L, Zhang X, Xiang Q, Chen Z, Wang C, Fan C, He Q. Severity of enterovirus A71 infection in a human SCARB2 knock-in mouse model is dependent on infectious strain and route. Emerg Microbes Infect 2018; 7:205. [PMID: 30518755 PMCID: PMC6281673 DOI: 10.1038/s41426-018-0201-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 09/10/2018] [Accepted: 10/25/2018] [Indexed: 11/30/2022]
Abstract
Enterovirus A71 (EV-A71) is a major etiological agent of human hand, foot and mouth disease, and it can cause severe neurological complications. Although several genotypes of EV-A71 strains are prevalent in different regions of the world, the genotype C4 has circulated in mainland China for more than 20 years. The pathogenicity of different EV-A71 clinical isolates varies and needs to be explored. In this study, hSCARB2 knock-in mice (N = 181) with a wide range of ages were tested for their susceptibility to two EV-A71 strains with the subgenotypes C4 and C2, and two infection routes (intracranial and venous) were compared. The clinical manifestations and pathology and their relationship to the measured viral loads in different tissues were monitored. We observed that 3 weeks is a crucial age, as mice younger than 3-week-old that were infected became extremely ill. However, mice older than 3 weeks displayed diverse clinical symptoms. Significant differences were observed in the pathogenicity of the two strains with respect to clinical signs, disease incidence, survival rate, and body weight change. We concluded that hSCARB2 knock-in mice are a sensitive model for investigating the clinical outcomes resulting from infection by different EV-A71 strains. The intracranial infection model appears to be suitable for evaluating EV-A71 neurovirulence, whereas the venous infection model is appropriate for studying the pathogenicity of EV-A71.
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Affiliation(s)
- Junping Zhu
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Ning Chen
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Shuya Zhou
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Kai Zheng
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Lin Sun
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Yuxiao Zhang
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Lina Cao
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Xiaoyan Zhang
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Qiaoyan Xiang
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Zhiyun Chen
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China
| | - Chenfei Wang
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Changfa Fan
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China.
| | - Qiushui He
- Department of Medical Microbiology, Capital Medical University, Beijing, 100069, China.
- Department of Medical Microbiology and Immunology, University of Turku, Turku, 20520, Finland.
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20
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Sun S, Bian L, Gao F, Du R, Hu Y, Fu Y, Su Y, Wu X, Mao Q, Liang Z. A neonatal mouse model of Enterovirus D68 infection induces both interstitial pneumonia and acute flaccid myelitis. Antiviral Res 2018; 161:108-115. [PMID: 30503887 DOI: 10.1016/j.antiviral.2018.11.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 11/01/2018] [Accepted: 11/26/2018] [Indexed: 02/08/2023]
Abstract
Enterovirus D68 (EV-D68) is a causative agent of recent outbreaks of severe respiratory illness, pneumonia and acute flaccid myelitis (AFM) worldwide. The study of the pathogenesis, vaccines and anti-viral drugs for EV-D68 infection has been reported. Given the previously described mouse model of EV-D68, we sought to establish a neonatal mice model inducing both pneumonia and AFM. The neonatal BALB/c mice were inoculated intraperitoneally with the EV-D68 strain (named15296-virus) which was produced by the reverse genetics method. The infected mice displayed limb paralysis, tachypnea and even death, which were similar to the clinical symptoms of human infections. Moreover, the results of histopathologic examination and immunohistochemical staining showed acidophilic necrosis in the muscle, the spinal cord and alveolar wall thickening in the lung, indicating that EV-D68 exhibited strong tropism to the muscles, spinal cord and lung. Furthermore, the results of real-time PCR also suggested that the viral loads in the blood, spinal cord, muscles and lung were higher than those in other tissues at different time points post-infection. Additionally, the neonatal mouse model was used for evaluating the EV-D68 infection. The results of the anti-serum passive and maternal antibody protection indicated that the neonatal mice could be protected against the EV-D68 challenge, and displayed that both the serum of 15296-virus and prototype-virus (Fermon) were performing a certain cross-protective activity against the 15296-virus challenge. In summary, the above results proved that our neonatal mouse model possessed not only the interstitial pneumonia and AFM simultaneously but also a potentiality to evaluate the protective effects of EV-D68 vaccines and anti-viral drugs in the future.
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Affiliation(s)
- Shiyang Sun
- Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences, Peking Union Medical College (PUMC), Beijing, China; National Institute for Food and Drug Control, Beijing, China.
| | - Lianlian Bian
- National Institute for Food and Drug Control, Beijing, China.
| | - Fan Gao
- National Institute for Food and Drug Control, Beijing, China.
| | - Ruixiao Du
- National Institute for Food and Drug Control, Beijing, China.
| | - Yalin Hu
- Hualan Biological Engineering Inc, Xinxiang, China.
| | - Ying Fu
- National Institute for Food and Drug Control, Beijing, China.
| | - Yao Su
- National Institute for Food and Drug Control, Beijing, China.
| | - Xing Wu
- National Institute for Food and Drug Control, Beijing, China.
| | - Qunying Mao
- National Institute for Food and Drug Control, Beijing, China.
| | - Zhenglun Liang
- National Institute for Food and Drug Control, Beijing, China.
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Zheng H, Wang J, Li B, Guo L, Li H, Song J, Yang Z, Li H, Fan H, Huang X, Long H, Cheng C, Chu M, He Z, Yu W, Li J, Gao Y, Ning R, Li N, Yang J, Wu Q, Shi H, Sun M, Liu L. A Novel Neutralizing Antibody Specific to the DE Loop of VP1 Can Inhibit EV-D68 Infection in Mice. THE JOURNAL OF IMMUNOLOGY 2018; 201:2557-2569. [PMID: 30282753 DOI: 10.4049/jimmunol.1800655] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/30/2018] [Indexed: 12/23/2022]
Abstract
Enterovirus D68 (EV-D68) belongs to the picornavirus family and was first isolated in CA, USA, in 1962. EV-D68 can cause severe cranial nerve system damage such as flaccid paralysis and acute respiratory diseases such as pneumonia. There are currently no efficient therapeutic methods or effective prophylactics. In this study, we isolated the mAb A6-1 from an EV-D68-infected rhesus macaque (Macaca mulatta) and found that the Ab provided effective protection in EV-D68 intranasally infected suckling mice. We observed that A6-1 bound to the DE loop of EV-D68 VP1 and interfered with the interaction between the EV-D68 virus and α2,6-linked sialic acids of the host cell. The production of A6-1 and its Ab properties present a bridging study for EV-D68 vaccine design and provide a tool for analyzing the process by which Abs can inhibit EV-D68 infection.
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Affiliation(s)
- Huiwen Zheng
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Jingjing Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Bingxiang Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Lei Guo
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Heng Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Jie Song
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Zening Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Hongzhe Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Haitao Fan
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Xing Huang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Haiting Long
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Chen Cheng
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Manman Chu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Zhanlong He
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Wenhai Yu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Jiaqi Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - You Gao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Ruotong Ning
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Nan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Jinxi Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Qiongwen Wu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Haijing Shi
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Ming Sun
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
| | - Longding Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China; and Key Laboratory of Systemic Innovative Research on Virus Vaccine, Chinese Academy of Medical Sciences, Kunming 650118, China
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Zhang Y, Li J, Li Q. Immune Evasion of Enteroviruses Under Innate Immune Monitoring. Front Microbiol 2018; 9:1866. [PMID: 30154774 PMCID: PMC6102382 DOI: 10.3389/fmicb.2018.01866] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/25/2018] [Indexed: 12/16/2022] Open
Abstract
As a major component of immunological defense against a great variety of pathogens, innate immunity is capable of activating the adaptive immune system. Viruses are a type of pathogen that proliferate parasitically in cells and have multiple strategies to escape from host immune pressure. Here, we review recent studies of the strategies and mechanisms by which enteroviruses evade innate immune monitoring.
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Affiliation(s)
- Ying Zhang
- Institute of Medical Biology, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Jingyan Li
- Institute of Medical Biology, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
| | - Qihan Li
- Institute of Medical Biology, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
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23
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Li R, Zanin M, Xia X, Yang Z. The tree shrew as a model for infectious diseases research. J Thorac Dis 2018; 10:S2272-S2279. [PMID: 30116606 DOI: 10.21037/jtd.2017.12.121] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Despite major advances in medicine, infectious diseases still pose a significant threat to humanity. Mammalian models of disease have proved extremely useful in adding to the understanding of infectious diseases and the development of prophylactic and/or therapeutic interventions. Arguably the most important considerations of any animal model are (I) the similarity of the model to humans with respect to anatomy, physiology, immunology and disease progression, and (II) the expense of conducting experiments using the model organism. Often the choice of a model represents a compromise between these factors. Here we review the Northern Tree shrew (Tupaia belangeri), or tupaia, as a useful model for the study of infectious diseases. Tupaias are non-human primates similar in size to squirrels that are indigenous to Asia. Their genome has been sequenced and, overall, shows relatively high similarity to humans. There is also a close homology of many aspects of tupaia biology with human biology. Importantly, from an infectious diseases viewpoint, tupaias are susceptible to infection with unadapted human pathogens and manifest clinical signs akin to human infections. Overall, the relatively small size of the tupaia, their homology to humans and their susceptibility to human pathogens make them a useful model for the study of infectious diseases.
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Affiliation(s)
- Runfeng Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, First Affiliated Hospital of Guagnzhou Medical University, Guangzhou 510120, China
| | - Mark Zanin
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Xueshan Xia
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650031, China
| | - Zifeng Yang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, First Affiliated Hospital of Guagnzhou Medical University, Guangzhou 510120, China
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Abstract
Epidemiological data indicate that coxsackievirus A10 (CVA10) has become one of the main causative agents of hand, foot and mouth disease (HFMD) and in recent years has often been found to co-circulate with other enteroviruses, which poses a challenge for the prevention and control of HFMD. Although most CVA10-associated HFMD cases present mild symptoms, severe manifestations and even death can also occur. However, the study of the pathogenesis and the development of drugs and vaccines for CVA10 infection are still far from complete. In this study, we established a neonatal mouse model for anti-viral evaluation and characterized the pathology of CVA10 infection. To develop the mouse model, both inbred and outbred mouse strains were used to compare their sensitivity to CVA10 infection; then, one-day-old BALB/c mice were selected and inoculated intraperitoneally with a CVA10 clinical strain, CVA10-FJ-01. Clinical symptoms, such as wasting, hind-limb paralysis and even death were observed in the CVA10-infected mice. Moreover, pathological examination and immunohistochemistry staining showed that severe myonecrosis with inflammatory infiltration was observed in CVA10-infected mice, indicating that CVA10 exhibited strong tropism to muscle tissue. Using real-time PCR, we also found that the viral load in the blood and muscle was higher than that in other organs/tissues at different time points post-infection, suggesting that CVA10 had a strong tropism to mice muscle and that viremic spread may also contribute to the death of the CVA10-infected mice. Additionally, to evaluate the neonatal mouse model of CVA10 infection, female mice were immunized with formalin-inactivated CVA10 and then allowed to mate after the third immunization. The results showed that maternal antibodies could protect mice against CVA10 infection. In summary, the results demonstrated that the neonatal mice model was a useful tool for evaluating the protective effects of CVA10 vaccines and anti-viral reagents.
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25
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Zhao T, Zhang Z, Zhang Y, Feng M, Fan S, Wang L, Liu L, Wang X, Wang Q, Zhang X, Wang J, Liao Y, He Z, Lu S, Yang H, Li Q. Dynamic Interaction of Enterovirus 71 and Dendritic Cells in Infected Neonatal Rhesus Macaques. Front Cell Infect Microbiol 2017; 7:171. [PMID: 28540257 PMCID: PMC5423916 DOI: 10.3389/fcimb.2017.00171] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 04/19/2017] [Indexed: 11/13/2022] Open
Abstract
Enterovirus 71 (EV71) is one of the main pathogens responsible for hand, foot, and mouth disease (HFMD). Infection with EV71 can lead to severe clinical disease via extensive infections of either the respiratory or alimentary tracts in children. Based on the previous pathological study of EV71 infections in neonatal rhesus macaques, our work using this animal model and an EV71 chimera that expresses enhanced green fluorescent protein (EGFP-EV71) primarily explored where EV71 localizes and proliferates, and the subsequent initiation of the pathological process. The chimeric EGFP-EV71 we constructed was similar to the wild-type EV71 (WT-EV71) virus in its biological characteristics. Similar clinical manifestations and histo-pathologic features were equally displayed in neonatal rhesus macaques infected with either WT-EV71 or EGFP-EV71 via the respiratory route. Fluorescent signal tracing in tissues from the animals infected with EGFP-EV71 showed that EV71 proliferated primarily in the respiratory tract epithelium and the associated lymphoid tissues. Immunofluorescence and flow cytometry analyses revealed that EV71 was able to enter a pre-conventional dendritic cell (DC) population at the infection sites. The viremia identified in the macaques infected by WT-EV71 or EGFP-EV71 was present even in the artificial presence of a specific antibody against the virus. Our results suggest that EV71 primarily proliferates in the respiratory tract epithelium followed by subsequent entry into a pre-cDC population of DCs. These cells are then hijacked by the virus and they can potentially transmit the virus from local sites to other organs through the blood circulation during the infection process. Our results suggest that the EV71 infection process in this DC population does not interfere with the induction of an independent immune response against the EV71 infection in the neonatal macaques.
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Affiliation(s)
- Ting Zhao
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Zhixiao Zhang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Ying Zhang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Min Feng
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Shengtao Fan
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Lichun Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Longding Liu
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Xi Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Qinglin Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Xiaolong Zhang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Jingjing Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Yun Liao
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Zhanlong He
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Shuaiyao Lu
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Huai Yang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
| | - Qihan Li
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunming, China
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Nasal Infection of Enterovirus D68 Leading to Lower Respiratory Tract Pathogenesis in Ferrets (Mustela putorius furo). Viruses 2017; 9:v9050104. [PMID: 28489053 PMCID: PMC5454417 DOI: 10.3390/v9050104] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 04/30/2017] [Accepted: 05/05/2017] [Indexed: 12/25/2022] Open
Abstract
Data from EV-D68-infected patients demonstrate that pathological changes in the lower respiratory tract are principally characterized by severe respiratory illness in children and acute flaccid myelitis. However, lack of a suitable animal model for EV-D68 infection has limited the study on the pathogenesis of this critical pathogen, and the development of a vaccine. Ferrets have been widely used to evaluate respiratory virus infections. In the current study, we used EV-D68-infected ferrets as a potential animal to identify impersonal indices, involving clinical features and histopathological changes in the upper and lower respiratory tract (URT and LRT). The research results demonstrate that the EV-D68 virus leads to minimal clinical symptoms in ferrets. According to the viral load detection in the feces, nasal, and respiratory tracts, the infection and shedding of EV-D68 in the ferret model was confirmed, and these results were supported by the EV-D68 VP1 immunofluorescence confocal imaging with α2,6-linked sialic acid (SA) in lung tissues. Furthermore, we detected the inflammatory cytokine/chemokine expression level, which implied high expression levels of interleukin (IL)-1a, IL-8, IL-5, IL-12, IL-13, and IL-17a in the lungs. These data indicate that systemic observation of responses following infection with EV-D68 in ferrets could be used as a model for EV-D68 infection and pathogenesis.
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Yi EJ, Shin YJ, Kim JH, Kim TG, Chang SY. Enterovirus 71 infection and vaccines. Clin Exp Vaccine Res 2017; 6:4-14. [PMID: 28168168 PMCID: PMC5292356 DOI: 10.7774/cevr.2017.6.1.4] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/02/2016] [Accepted: 10/30/2016] [Indexed: 01/15/2023] Open
Abstract
Hand, foot and mouth disease (HFMD) is a highly contagious viral infection affecting young children during the spring to fall seasons. Recently, serious outbreaks of HFMD were reported frequently in the Asia-Pacific region, including China and Korea. The symptoms of HFMD are usually mild, comprising fever, loss of appetite, and a rash with blisters, which do not need specific treatment. However, there are uncommon neurological or cardiac complications such as meningitis and acute flaccid paralysis that can be fatal. HFMD is most commonly caused by infection with coxsackievirus A16, and secondly by enterovirus 71 (EV71). Many other strains of coxsackievirus and enterovirus can also cause HFMD. Importantly, HFMD caused by EV71 tends to be associated with fatal complications. Therefore, there is an urgent need to protect against EV71 infection. Development of vaccines against EV71 would be the most effective approach to prevent EV71 outbreaks. Here, we summarize EV71 infection and development of vaccines, focusing on current scientific and clinical progress.
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Affiliation(s)
- Eun-Je Yi
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, Korea
| | - Yun-Ju Shin
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, Korea
| | - Jeong-Hwan Kim
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, Korea
| | - Tae-Gyun Kim
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, Korea
| | - Sun-Young Chang
- Laboratory of Microbiology, College of Pharmacy, Ajou University, Suwon, Korea.; Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon, Korea
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Feng M, Guo S, Fan S, Zeng X, Zhang Y, Liao Y, Wang J, Zhao T, Wang L, Che Y, Wang J, Ma N, Liu L, Yue L, Li Q. The Preferential Infection of Astrocytes by Enterovirus 71 Plays a Key Role in the Viral Neurogenic Pathogenesis. Front Cell Infect Microbiol 2016; 6:192. [PMID: 28066727 PMCID: PMC5174126 DOI: 10.3389/fcimb.2016.00192] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 12/07/2016] [Indexed: 02/06/2023] Open
Abstract
The pathological manifestations of fatal cases of human hand, foot, and mouth disease (HFMD) caused by enterovirus 71 (EV71) are characterized by inflammatory damage to the central nervous system (CNS). Here, the dynamic distribution of EV71 in the CNS and the subsequent pathological characteristics within different regions of neonatal rhesus macaque brain tissue were studied using a chimeric EV71 expressing green fluorescence protein. The results were compared with brain tissue obtained from the autopsies of deceased EV71-infected HFMD patients. These observations suggested that the virus was prevalent in areas around the blood vessels and nerve nuclei in the brain stem and showed a preference for astrocytes in the CNS. Interestingly, infected astrocytes within the in vivo and in vitro human and macaque systems exhibited increased expression of excitatory neurotransmitters and cytokines that also stimulated the neuronal secretion of the excitatory neurotransmitters noradrenalin and adrenalin, and this process most likely plays a role in the pathophysiological events that occur during EV71 infection.
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Affiliation(s)
- Min Feng
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Sujie Guo
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Shengtao Fan
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Xiaofeng Zeng
- School of Forensic Medicine, Kunming Medical University Kunming, China
| | - Ying Zhang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Yun Liao
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Jianbin Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Ting Zhao
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Lichun Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Yanchun Che
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Jingjing Wang
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Na Ma
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Longding Liu
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Lei Yue
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
| | - Qihan Li
- Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College Kunming, China
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Xu Y, Ma S, Zhu L, Huang Z, Chen L, Xu Y, Yin H, Peng T, Wang Y. Clinically isolated enterovirus A71 subgenogroup C4 strain with lethal pathogenicity in 14-day-old mice and the application as an EV-A71 mouse infection model. Antiviral Res 2016; 137:67-75. [PMID: 27864074 DOI: 10.1016/j.antiviral.2016.11.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 11/07/2016] [Accepted: 11/08/2016] [Indexed: 11/25/2022]
Abstract
The Enterovirus A71 (EV-A71) subgenogroup C4 is prevalent in China. EV-A71 causes hand, foot and mouth disease (HFMD) in children and may lead to severe neurological diseases. The development of antiviral and protective vaccines against EV-A71 is significantly hindered by the lack of suitable animal models to recapitulate human neurological symptoms. In this study, GZ-CII, a highly virulent EV-A71 subgenogroup C4 strain, was isolated from hospitalized children with HFMD. Intraperitoneal infections of GZ-CII resulted in progressive neurological disease in mice as old as 14 days. Administration of an inactivated EV-A71 vaccine or an anti-EV-A71 immune serum protected the mice against the GZ-CII infection. This demonstrated that a mouse model with EV-A71 GZ-CII could be used to evaluate potential vaccine candidates and therapeutics for subgenogroup C4. Comparing the genome sequence of GZ-CII with that of the avirulent EV-A71 subgenogroup C4 strain revealed unique mutations in GZ-CII. When mutation VP2-K149I was introduced into the nonpathogenic EV-A71 subgenogroup C4 strain, the variant similar to GZ-CII significantly increased viral replication and virulence in mice. These results indicated that the VP2-K149I mutation played an important role in enhancing the virulence of the EV-A71 subgenogroup C4 strain in mice, and that mice infected with the GZ-CII strain are a promising model for evaluating vaccines and therapeutics against the EV-A71 subgenogroup C4.
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Affiliation(s)
- Yi Xu
- Guangzhou Women and Children's Medical Center, Guangzhou Medical University Guangzhou, China
| | - Shuzhi Ma
- Guangdong South China United Vaccine Institute, Guangzhou, China; Sino-French Hoffmann Institute of Immunology, State Key Laboratory of Respiratory Disease, College of Basic Medical Science, Guangzhou Medical University, Guangzhou, China
| | - Limeng Zhu
- Sino-French Hoffmann Institute of Immunology, State Key Laboratory of Respiratory Disease, College of Basic Medical Science, Guangzhou Medical University, Guangzhou, China
| | - Zhiqiu Huang
- Guangdong South China United Vaccine Institute, Guangzhou, China
| | - Liyun Chen
- Guangdong South China United Vaccine Institute, Guangzhou, China
| | - Yuhua Xu
- Guangdong South China United Vaccine Institute, Guangzhou, China; Sino-French Hoffmann Institute of Immunology, State Key Laboratory of Respiratory Disease, College of Basic Medical Science, Guangzhou Medical University, Guangzhou, China
| | - Haibin Yin
- Guangdong South China United Vaccine Institute, Guangzhou, China
| | - Tao Peng
- Guangdong South China United Vaccine Institute, Guangzhou, China; Sino-French Hoffmann Institute of Immunology, State Key Laboratory of Respiratory Disease, College of Basic Medical Science, Guangzhou Medical University, Guangzhou, China.
| | - Yi Wang
- Guangdong South China United Vaccine Institute, Guangzhou, China; The First Affiliated Hospital, Guangdong Pharmaceutical University, Guangzhou, China.
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30
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Wang J, Zhang Y, Zhang X, Hu Y, Dong C, Liu L, Yang E, Che Y, Pu J, Wang X, Song J, Liao Y, Feng M, Liang Y, Zhao T, Jiang L, He Z, Lu S, Wang L, Li Y, Fan S, Guo L, Li Q. Pathologic and immunologic characteristics of coxsackievirus A16 infection in rhesus macaques. Virology 2016; 500:198-208. [PMID: 27829175 DOI: 10.1016/j.virol.2016.10.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 10/02/2016] [Accepted: 10/31/2016] [Indexed: 11/26/2022]
Abstract
Coxsackievirus A16 (CV-A16) causes human hand, foot and mouth disease, but its pathogenesis is unclear. In rhesus macaques, CV-A16 infection causes characteristic vesicles in the oral mucosa and limbs as well as viremia and positive viral loads in the tissues, suggesting that these animals reflect the pathologic process of the infection. An immunologic analysis indicated a defective immune response, which included undetectable neutralizing antibodies and IFN-γ-specific memory T-cells in macaques infected with CV-A16. Furthermore, existing neutralizing antibodies in macaques immunized with the inactivated vaccine were surprisingly unable to protect against a viral challenge despite the presence of a positive T-cell memory response against viral antigens. The virus was capable of infecting pre-conventional dendritic cells and replicating within them, which may correlate with the immunological characteristics observed in the animals.
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Affiliation(s)
- Jingjing Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Ying Zhang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Xiaolong Zhang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Yajie Hu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Chenghong Dong
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Longding Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Erxia Yang
- Jiangsu Convac Biotechnology Co., Ltd., Taizhou, Jiangsu, China
| | - Yanchun Che
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Jing Pu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Xi Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Jie Song
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Yun Liao
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Min Feng
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Yan Liang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Ting Zhao
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Li Jiang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China; Jiangsu Convac Biotechnology Co., Ltd., Taizhou, Jiangsu, China
| | - Zhanlong He
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Shuaiyao Lu
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Lichun Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Yanyan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Shengtao Fan
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Lei Guo
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China
| | - Qihan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, Yunnan, China.
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31
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Victorio CBL, Xu Y, Ng Q, Meng T, Chow VTK, Chua KB. Cooperative effect of the VP1 amino acids 98E, 145A and 169F in the productive infection of mouse cell lines by enterovirus 71 (BS strain). Emerg Microbes Infect 2016; 5:e60. [PMID: 27329847 PMCID: PMC4932649 DOI: 10.1038/emi.2016.56] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 02/10/2016] [Accepted: 03/22/2016] [Indexed: 12/21/2022]
Abstract
Enterovirus 71 (EV71) is a neurotrophic virus that causes hand, foot and mouth disease (HFMD) and occasional neurological infection among children. It infects primate cells but not rodent cells, primarily due to the incompatibility between the virus and the expressed form of its receptor, scavenger receptor class B member 2 (SCARB2) protein, on rodent cells (mSCARB2). We previously generated adapted strains (EV71:TLLm and EV71:TLLmv) that were shown to productively infect primate and rodent cell lines and whose genomes exhibited a multitude of non-synonymous mutations compared with the EV71:BS parental virus. In this study, we aimed to identify mutations that are necessary for productive infection of murine cells by EV71:BS. Using reverse genetics and site-directed mutagenesis, we constructed EV71 infectious clones with specific mutations that generated amino acid substitutions in the capsid VP1 and VP2 proteins. We subsequently assessed the infection induced by clone-derived viruses (CDVs) in mouse embryonic fibroblast NIH/3T3 and murine neuroblastoma Neuro-2a cell lines. We found that the CDV:BS-VP1(K98E,E145A,L169F) with three substitutions in the VP1 protein-K98E, E145A and L169F-productively infected both mouse cell lines for at least three passages of the virus in murine cells. Moreover, the virus gained the ability to utilize the mSCARB2 protein to infect murine cell lines. These results demonstrate that the three VP1 residues cooperate to effectively interact with the mSCARB2 protein on murine cells and permit the virus to infect murine cells. Gain-of-function studies similar to the present work provide valuable insight into the mutational trajectory required for EV71 to infect new host cells previously non-susceptible to infection.
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Affiliation(s)
- Carla Bianca Luena Victorio
- Temasek Lifesciences Laboratory, National University of Singapore, Singapore 117604, Singapore
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Yishi Xu
- Temasek Lifesciences Laboratory, National University of Singapore, Singapore 117604, Singapore
| | - Qimei Ng
- Temasek Lifesciences Laboratory, National University of Singapore, Singapore 117604, Singapore
| | - Tao Meng
- Temasek Lifesciences Laboratory, National University of Singapore, Singapore 117604, Singapore
| | - Vincent TK Chow
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore
| | - Kaw Bing Chua
- Temasek Lifesciences Laboratory, National University of Singapore, Singapore 117604, Singapore
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32
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Zhou S, Liu Q, Wu X, Chen P, Wu X, Guo Y, Liu S, Liang Z, Fan C, Wang Y. A safe and sensitive enterovirus A71 infection model based on human SCARB2 knock-in mice. Vaccine 2016; 34:2729-36. [PMID: 27102822 DOI: 10.1016/j.vaccine.2016.04.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 01/10/2016] [Accepted: 04/08/2016] [Indexed: 11/24/2022]
Abstract
Enterovirus A71 infection has become a severe threat for global public health. Vaccines for controlling and preventing Enterovirus A71 epidemics are highly demanded, however, vaccine evaluation has been hindered by the lack of suitable Enterovirus A71 infection animal models. Here we established an hSCARB2 knockin mouse model for real-time monitoring of enterovirus A71 infection in vivo. This model was sensitive to the infection of both replication-competent virus rEV71(FY)-EGFP and single round pseudotype virus pEV71(FY)-Luc. The intensity of bioluminescence correlated well with viral loads in infected tissues (R=0.86, P<0.01). Pathological changes recapitulated human infectious and clinical features of enterovirus A71, including both general characteristics of "hand foot and mouth" and the severe symptoms in the CNS. A formalin-inactivated enterovirus A71 vaccine can elicit antibodies in R26-hSCARB2 mice, which play effective roles in protecting knockin mice against enterovirus A71 infection as indicated by bioluminescence. Therefore, this work provides a safe, sensitive and visualizing model for exploring mechanisms of enterovirus A71 infection and examining human enterovirus A71 vaccines and antiviral therapies.
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MESH Headings
- Animals
- Antibodies, Neutralizing/blood
- Antibodies, Viral/blood
- Disease Models, Animal
- Enterovirus A, Human
- Female
- Gene Knock-In Techniques
- Hand, Foot and Mouth Disease/immunology
- Hand, Foot and Mouth Disease/pathology
- Humans
- Luminescent Measurements
- Lysosomal Membrane Proteins/genetics
- Male
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Transgenic
- Mutagenesis, Insertional
- Receptors, Scavenger/genetics
- Vaccines, Inactivated/immunology
- Viral Load
- Viral Vaccines/immunology
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Affiliation(s)
- Shuya Zhou
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Qiang Liu
- Division of HIV/AIDS and Sex-transmitted Virus Vaccines, Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Xing Wu
- Division of Hepatitis Vaccine, Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Pan Chen
- Division of Hepatitis Vaccine, Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Xi Wu
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Yanan Guo
- Biocytogen Co., Ltd., Beijing, 101111, China
| | - Susu Liu
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Zhenglun Liang
- Division of Hepatitis Vaccine, Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Changfa Fan
- Division of Animal Model Research, Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, 100050, China
| | - Youchun Wang
- Division of HIV/AIDS and Sex-transmitted Virus Vaccines, Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes for Food and Drug Control, Beijing, 100050, China.
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Li ZH, Yue YY, Li P, Song NN, Li B, Zhang Y, Meng H, Jiang GS, Qin L. MA104 Cell line presents characteristics suitable for enterovirus A71 isolation and proliferation. Microbiol Immunol 2016; 59:477-82. [PMID: 26138857 DOI: 10.1111/1348-0421.12281] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 06/09/2015] [Accepted: 06/28/2015] [Indexed: 11/27/2022]
Abstract
Enterovirus A71 (EV-A71), one of the most important causative agents of hand, foot and mouth disease (HFMD) in children, can lead to severe clinical outcomes, even death. However, the infection spectrum of EV-A71 in different cell lines remains unknown. Therefore, in this study, the biological characteristics of EV-A71 Subgroup C4 in different cell lines were investigated. To this end, the infectivity of EV-A71Jinan1002 isolated from children with severe HFMD was assessed in 18 different host cell lines. It was found that the MA104 cell line displayed biological characteristics suitable for EV-A71 Subgroup C4 strain isolation and proliferation; indeed, it was found that a broad spectrum of cell lines can be infected by EV-A71Jinan1002. Among the screened cells, four cell lines (HEK293, RD, MA104 and Marc145) produced high 50% tissue culture infective dose (TCID50 ) values calculated in viral proliferations (ranged from 10(7.6) to 10(7.8) ); the TCID50 being negatively associated with the time to appearance of CPE. Proliferation curves demonstrated that EV-A71Jinan1002 amplifies more efficiently in MA104, Hep-2 and RD cells. Remarkably, the virus isolation rate was much higher in MA104 cells than in RD cells. Thus this study, to our knowledge, is for the first to explore the infection spectrum of EV-A71 subgroup C4 in such a large number of different cell lines. Our data provide useful reference data for facilitating further study of EV-A71.
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Affiliation(s)
- Zhi-Hui Li
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Ying-Ying Yue
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Peng Li
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Nan-Nan Song
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Bingqing Li
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Ying Zhang
- Jinan Infectious Disease Hospital, 22029 Jingshi Road, Jinan 250021, China
| | - Hong Meng
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Guo-Sheng Jiang
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
| | - Lizeng Qin
- Department of Microbiology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Key Laboratory of Rare and Uncommon Diseases, 18877 Jingshi Road, Jinan 250062
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34
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Phyu WK, Ong KC, Wong KT. A Consistent Orally-Infected Hamster Model for Enterovirus A71 Encephalomyelitis Demonstrates Squamous Lesions in the Paws, Skin and Oral Cavity Reminiscent of Hand-Foot-and-Mouth Disease. PLoS One 2016; 11:e0147463. [PMID: 26815859 PMCID: PMC4729525 DOI: 10.1371/journal.pone.0147463] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 12/31/2015] [Indexed: 11/26/2022] Open
Abstract
Enterovirus A71 (EV-A71) causes self-limiting, hand-foot-and-mouth disease (HFMD) that may rarely be complicated by encephalomyelitis. Person-to-person transmission is usually by fecal-oral or oral-oral routes. To study viral replication sites in the oral cavity and other tissues, and to gain further insights into virus shedding and neuropathogenesis, we developed a consistent, orally-infected, 2-week-old hamster model of HFMD and EV-A71 encephalomyelitis. Tissues from orally-infected, 2-week-old hamsters were studied by light microscopy, immunohistochemistry and in situ hybridization to detect viral antigens and RNA, respectively, and by virus titration. Hamsters developed the disease and died after 4–8 days post infection; LD50 was 25 CCID50. Macroscopic cutaneous lesions around the oral cavity and paws were observed. Squamous epithelium in the lip, oral cavity, paw, skin, and esophagus, showed multiple small inflammatory foci around squamous cells that demonstrated viral antigens/RNA. Neurons (brainstem, spinal cord, sensory ganglia), acinar cells (salivary gland, lacrimal gland), lymphoid cells (lymph node, spleen), and muscle fibres (skeletal, cardiac and smooth muscles), liver and gastric epithelium also showed varying amounts of viral antigens/RNA. Intestinal epithelium, Peyer’s patches, thymus, pancreas, lung and kidney were negative. Virus was isolated from oral washes, feces, brain, spinal cord, skeletal muscle, serum, and other tissues. Our animal model should be useful to study squamous epitheliotropism, neuropathogenesis, oral/fecal shedding in EV-A71 infection, person-to-person transmission, and to test anti-viral drugs and vaccines.
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Affiliation(s)
- Win Kyaw Phyu
- Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kien Chai Ong
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kum Thong Wong
- Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
- * E-mail:
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35
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Zhongping X, Hua L, Ting Y, Zhengling L, Min F, Tianhong X, Runxiang L, Dong S, Guangju J, Lei Y, Rong Y, Fangyu L, Qihan L. Biological characteristics of different epidemic enterovirus 71 strains and their pathogeneses in neonatal mice and rhesus monkeys. Virus Res 2015; 213:82-89. [PMID: 26555165 DOI: 10.1016/j.virusres.2015.11.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/01/2015] [Accepted: 11/04/2015] [Indexed: 11/19/2022]
Abstract
Hand, foot and mouth disease (HFMD) has been prevalent in China since 2008. Enterovirus 71 (EV71) is a common causative agent of HFMD, and various strains of EV71 are prevalent worldwide. The EV71C4 subgenotype is the most endemic strain in China. However, few studies investigating the biological characteristics and pathogeneses of different C4 strains have been reported. Therefore, the current study investigated 19 clinical EV71 strains in neonatal ICR mice and neonatal rhesus monkeys by comparing pathogenicity; the virulence of different viral passages, dosages, and routes of infection; and the effects produced by subject animal age. These 19 clinical EV71 strains, which were of the same subtype, displayed varying pathogenic effects. Three strains (HE31, 231 and 262) induced limb paralysis in neonatal ICR mice. In addition, the degree of virulence was largely dependent upon the dose, route of infection, and number of passages of the challenge virus, as well as the ages of the infected animals. The present study provides valuable basic data to enable further research into EV71 pathogenesis and to facilitate the development of new drugs and vaccines.
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Affiliation(s)
- Xie Zhongping
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Li Hua
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Yang Ting
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Liu Zhengling
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Feng Min
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Xie Tianhong
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Long Runxiang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Shen Dong
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Jiang Guangju
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Yue Lei
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Yang Rong
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Luo Fangyu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China
| | - Li Qihan
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, 650118, China.
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36
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Zhang Y, Wang L, Liao Y, Liu L, Ma K, Yang E, Wang J, Che Y, Jiang L, Pu J, Guo L, Feng M, Liang Y, Cui W, Yang H, Li Q. Similar protective immunity induced by an inactivated enterovirus 71 (EV71) vaccine in neonatal rhesus macaques and children. Vaccine 2015; 33:6290-7. [PMID: 26419198 DOI: 10.1016/j.vaccine.2015.09.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/15/2015] [Accepted: 09/17/2015] [Indexed: 12/16/2022]
Abstract
During the development of enterovirus 71 (EV71) inactivated vaccine for preventing human hand, foot and mouth diseases (HFMD) by EV71 infection, an effective animal model is presumed to be significant and necessary. Our previous study demonstrated that the vesicles in oral regions and limbs potentially associated with viremia, which are the typical manifestations of HFMD, and remarkable pathologic changes were identified in various tissues of neonatal rhesus macaque during EV71 infection. Although an immune response in terms of neutralizing antibody and T cell memory was observed in animals infected by the virus or stimulated by viral antigen, whether such a response could be considered as an indicator to justify the immune response in individuals vaccinated or infected in a pandemic needs to be investigated. Here, a comparative analysis of the neutralizing antibody response and IFN-γ-specific T cell response in vaccinated neonatal rhesus macaques and a human clinical trial with an EV71 inactivated vaccine was performed, and the results showed the identical tendency and increased level of neutralizing antibody and the IFN-γ-specific T cell response stimulated by the EV71 antigen peptide. Importantly, the clinical protective efficacy against virus infection by the elicited immune response in the immunized population compared with the placebo control and the up-modulated gene profile associated with immune activation were similar to those in infected macaques. Further safety verification of this vaccine in neonatal rhesus macaques and children confirmed the potential use of the macaque as a reliable model for the evaluation of an EV71 candidate vaccine.
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Affiliation(s)
- Ying Zhang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Lichun Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Yun Liao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Longding Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Kaili Ma
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Erxia Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China; Jiangsu Convac Biotechnology Co., Ltd., Taizhou, Jiangsu 225300, China
| | - Jingjing Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Yanchun Che
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Li Jiang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China; Jiangsu Convac Biotechnology Co., Ltd., Taizhou, Jiangsu 225300, China
| | - Jing Pu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Lei Guo
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Min Feng
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Yan Liang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Wei Cui
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China; Jiangsu Convac Biotechnology Co., Ltd., Taizhou, Jiangsu 225300, China
| | - Huai Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Qihan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, China.
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37
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Lim PY, Hickey AC, Jamiluddin MF, Hamid S, Kramer J, Santos R, Bossart KN, Cardosa MJ. Immunogenicity and performance of an enterovirus 71 virus-like-particle vaccine in nonhuman primates. Vaccine 2015; 33:6017-24. [PMID: 26271825 DOI: 10.1016/j.vaccine.2015.05.108] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 05/17/2015] [Indexed: 11/29/2022]
Abstract
A vaccine against human enterovirus 71 (EV-A71) is urgently needed to combat outbreaks of EV-A71 and in particular, the serious neurological complications that manifest during these outbreaks. In this study, an EV-A71 virus-like-particle (VLP) based on a B5 subgenogroup (EV-A71-B5 VLP) was generated using an insect cell/baculovirus platform. Biochemical analysis demonstrated that the purified VLP had a highly native procapsid structure and initial studies in vivo demonstrated that the VLPs were immunogenic in mice. The impact of VLP immunization on infection was examined in non-human primates using a VLP prime-boost strategy prior to EV-A71 challenge. Rhesus macaques were immunized on day 0 and day 21 with VLPs (100 μg/dose) containing adjuvant or with adjuvant alone (controls), and were challenged with EV-A71 on day 42. Complete blood counts, serum chemistry, magnetic resonance imaging (MRI) scans, and histopathology results were mostly normal in vaccinated and control animals after virus challenge demonstrating that the fatal EV-A71-B3 clinical isolate used in this study was not highly virulent in rhesus macaques. Viral genome and/or infectious virus were detected in blood, spleen or brain of two of three control animals, but not in any specimens from the vaccinated animals, indicating that VLP immunization prevented systemic spread of EV-A71 in rhesus macaques. High levels of IgM and IgG were detected in VLP-vaccinated animals and these responses were highly specific for EV-A71 particles and capsid proteins. Serum from vaccinated animals also exhibited similar neutralizing activity against different subgenogroups of EV-A71 demonstrating that the VLPs induced cross-neutralizing antibodies. In conclusion, our EV-A71-B5 VLP is safe, highly immunogenic, and prevents systemic EV-A71-B3 infection in nonhuman primates making it a viable attractive vaccine candidate for EV-A71.
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Affiliation(s)
- Pei-Yin Lim
- Sentinext Therapeutics Sdn Bhd, Suite 19H Menara Northam, 55 Jalan Sultan Ahmad Shah, Penang 10050, Malaysia
| | - Andrew C Hickey
- Commissioned Corps, United States Public Health Service, 1101 Wooton Parway, Rockville, MD 20852, USA; Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, 4301 Jones Bridger Road, Bethesda, MD 20814, USA
| | - Mohamad F Jamiluddin
- Sentinext Therapeutics Sdn Bhd, Suite 19H Menara Northam, 55 Jalan Sultan Ahmad Shah, Penang 10050, Malaysia
| | - Sharifah Hamid
- Sentinext Therapeutics Sdn Bhd, Suite 19H Menara Northam, 55 Jalan Sultan Ahmad Shah, Penang 10050, Malaysia
| | - Joshua Kramer
- Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, 9000 Rockville Pike, Bethesda, MD 20892, USA
| | - Rosemary Santos
- Department of Animal Medicine, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA
| | - Katharine N Bossart
- Integrated Research Associates, 4050 Redwood Highway, San Rafael, CA 94903, USA.
| | - M Jane Cardosa
- Sentinext Therapeutics Sdn Bhd, Suite 19H Menara Northam, 55 Jalan Sultan Ahmad Shah, Penang 10050, Malaysia
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Cao L, Mao F, Pang Z, Yi Y, Qiu F, Tian R, Meng Q, Jia Z, Bi S. Protective effect of enterovirus‑71 (EV71) virus‑like particle vaccine against lethal EV71 infection in a neonatal mouse model. Mol Med Rep 2015; 12:2473-80. [PMID: 25936344 PMCID: PMC4464482 DOI: 10.3892/mmr.2015.3680] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 03/16/2015] [Indexed: 01/01/2023] Open
Abstract
Enterovirus-71 (EV71) is a viral pathogen that causes severe cases of hand, foot and mouth disease (HFMD) among young children, with significant mortality. Effective vaccines against HFMD are urgently required. Several EV71 virus-like particle (VLP) vaccine candidates were found to be protective in the neonatal mouse EV71 challenge model. However, to what extent the VLP vaccine protects susceptible organs against EV71 infection in vivo has remained elusive. In the present study, the comprehensive immunogenicity of a potential EV71 vaccine candidate based on VLPs was evaluated in a neonatal mouse model. Despite lower levels of neutralizing antibodies to EV71 in the sera of VLP-immunized mice compared with those in mice vaccinated with inactivated EV71, the VLP-based vaccine was shown to be able to induce immunoglobulin (Ig)G and IgA memory-associated cellular immune responses to EV71. Of note, the EV71 VLP vaccine candidate was capable of inhibiting viral proliferation in cardiac muscle, skeletal muscle, lung and intestine of immunized mice and provided effective protection against the pathological damage caused by viral attack. In particular, the VLP vaccine was able to inhibit the transportation of EV71 from the central nervous system to the muscle tissue and greatly protected muscle tissue from infection, along with recovery from the viral infection. This led to nearly 100% immunoprotective efficacy, enabling neonatal mice delivered by VLP-immunized female adult mice to survive and grow with good health. The present study provided valuable additional knowledge of the specific protective efficacy of the EV71 VLP vaccine in vivo, which also indicated that it is a promising potential candidate for being developed into an EV71 vaccine.
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Affiliation(s)
- Lei Cao
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Fengfeng Mao
- Laboratory Animal Center, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Zheng Pang
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Yao Yi
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Feng Qiu
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Ruiguang Tian
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Qingling Meng
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Zhiyuan Jia
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
| | - Shengli Bi
- Department of Viral Hepatitis, National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, P.R. China
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Zhang XL, Pang W, Hu XT, Li JL, Yao YG, Zheng YT. Experimental primates and non-human primate (NHP) models of human diseases in China: current status and progress. DONG WU XUE YAN JIU = ZOOLOGICAL RESEARCH 2014; 35:447-64. [PMID: 25465081 PMCID: PMC4790274 DOI: 10.13918/j.issn.2095-8137.2014.6.447] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 08/15/2014] [Indexed: 12/16/2022]
Abstract
Non-human primates (NHPs) are phylogenetically close to humans, with many similarities in terms of physiology, anatomy, immunology, as well as neurology, all of which make them excellent experimental models for biomedical research. Compared with developed countries in America and Europe, China has relatively rich primate resources and has continually aimed to develop NHPs resources. Currently, China is a leading producer and a major supplier of NHPs on the international market. However, there are some deficiencies in feeding and management that have hampered China's growth in NHP research and materials. Nonetheless, China has recently established a number of primate animal models for human diseases and achieved marked scientific progress on infectious diseases, cardiovascular diseases, endocrine diseases, reproductive diseases, neurological diseases, and ophthalmic diseases, etc. Advances in these fields via NHP models will undoubtedly further promote the development of China's life sciences and pharmaceutical industry, and enhance China's position as a leader in NHP research. This review covers the current status of NHPs in China and other areas, highlighting the latest developments in disease models using NHPs, as well as outlining basic problems and proposing effective countermeasures to better utilize NHP resources and further foster NHP research in China.
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Affiliation(s)
- Xiao-Liang Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China;Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming Yunnan 650500, China
| | - Wei Pang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Xin-Tian Hu
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China;Kunming Primate Research Center of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Jia-Li Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China;Kunming Primate Research Center of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Yong-Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China;Kunming Primate Research Center of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Yong-Tang Zheng
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China;Kunming Primate Research Center of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China;Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming Yunnan 650500, China.
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Jiao XY, Guo L, Huang DY, Chang XL, Qiu QC. Distribution of EV71 receptors SCARB2 and PSGL-1 in human tissues. Virus Res 2014; 190:40-52. [PMID: 24997419 DOI: 10.1016/j.virusres.2014.05.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 05/08/2014] [Accepted: 05/08/2014] [Indexed: 02/05/2023]
Abstract
The aim of this study was to investigate the distribution of Enterovirus 71 (EV71) receptors SCARB2 and PSGL-1 in human tissues. The samples were chosen from archived specimens, and the profiles of two receptors were detected in the gastrointestinal tract, lung, and brain in situ by immunohistochemistry. SCARB2 was detected in all the tissues studied, and strong staining was observed in the gastric fundus gland, mucosal and glandular epithelia of the intestine. Similar expression was found in bronchial epithelia and pneumocytes. In addition, SCARB2 was observed in the esophagus/gastric mucosal epithelia, neuron, glial cells, and blood vessels and the perivascular tissues of the brain. By comparison, PSGL-1 was expressed weakly in the mucosal and glandular epithelia of the small intestine and colon. PSGL-1 was expressed in a few bronchial epithelia, and weak staining was observed in the pneumocytes. However, PSGL-1 was found easily in the lamina propria of all the tissues studied, and strong staining of PSGL-1 was also observed in the neurons and glial cells. The distribution of the SCARB2 and PSGL-1 in human gastrointestinal tract, lung, and brain tissues correlated with the distribution of pathological changes seen in EV71 infection. The widespread prevalence of these receptors may help explain the multiple organ involvement in infection with EV71.
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Affiliation(s)
- Xiao-Yang Jiao
- Department of Cell Biology and Genetics, Shantou University Medical College, 22 Xinling Road, Shantou 515041, China; Department of Pathology, The First Affiliated Hospital of Shantou University Medical College, Changpin Road, Shantou 515041, China.
| | - Li Guo
- Department of Cell Biology and Genetics, Shantou University Medical College, 22 Xinling Road, Shantou 515041, China
| | - Dong-Yang Huang
- Department of Cell Biology and Genetics, Shantou University Medical College, 22 Xinling Road, Shantou 515041, China
| | - Xiao-Lan Chang
- Department of Cell Biology and Genetics, Shantou University Medical College, 22 Xinling Road, Shantou 515041, China
| | - Qian-Cheng Qiu
- Department of Pathology, The First Affiliated Hospital of Shantou University Medical College, Changpin Road, Shantou 515041, China.
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The approved pediatric drug suramin identified as a clinical candidate for the treatment of EV71 infection-suramin inhibits EV71 infection in vitro and in vivo. Emerg Microbes Infect 2014; 3:e62. [PMID: 26038755 PMCID: PMC4185360 DOI: 10.1038/emi.2014.60] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 06/26/2014] [Accepted: 06/27/2014] [Indexed: 01/17/2023]
Abstract
Enterovirus 71 (EV71) causes severe central nervous system infections, leading to cardiopulmonary complications and death in young children. There is an urgent unmet medical need for new pharmaceutical agents to control EV71 infections. Using a multidisciplinary approach, we found that the approved pediatric antiparasitic drug suramin blocked EV71 infectivity by a novel mechanism of action that involves binding of the naphtalentrisulonic acid group of suramin to the viral capsid. Moreover, we demonstrate that when suramin is used in vivo at doses equivalent to or lower than the highest dose already used in humans, it significantly decreased mortality in mice challenged with a lethal dose of EV71 and peak viral load in adult rhesus monkeys. Thus, suramin inhibits EV71 infection by neutralizing virus particles prior to cell attachment. Consequently, these findings identify suramin as a clinical candidate for further development as a therapeutic or prophylactic treatment for severe EV71 infection.
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Hsiao HB, Chou AH, Lin SI, Lien SP, Liu CC, Chong P, Chen CY, Tao MH, Liu SJ. Delivery of human EV71 receptors by adeno-associated virus increases EV71 infection-induced local inflammation in adult mice. BIOMED RESEARCH INTERNATIONAL 2014; 2014:878139. [PMID: 25243194 PMCID: PMC4163470 DOI: 10.1155/2014/878139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/22/2014] [Accepted: 07/28/2014] [Indexed: 11/17/2022]
Abstract
Enterovirus71 (EV71) is now recognized as an emerging neurotropic virus in Asia and one major causative agent of hand-foot-mouth diseases (HFMD). However potential animal models for vaccine development are limited to young mice. In this study, we used an adeno-associated virus (AAV) vector to introduce the human EV71 receptors P-selectin glycoprotein ligand-1 (hPSGL1) or a scavenger receptor class-B member-2 (hSCARB2) into adult ICR mice to change their susceptibility to EV71 infection. Mice were administered AAV-hSCARB2 or AAV-hPSGL1 through intravenous and oral routes. After three weeks, expression of human SCARB2 and PSGL1 was detected in various organs. After infection with EV71, we found that the EV71 viral load in AAV-hSCARB2- or AAV-hPSGL1-transduced mice was higher than that of the control mice in both the brain and intestines. The presence of EV71 viral particles in tissues was confirmed using immunohistochemistry analysis. Moreover, inflammatory cytokines were induced in the brain and intestines of AAV-hSCARB2- or AAV-hPSGL1-transduced mice after EV71 infection but not in wild-type mice. However, neurological disease was not observed in these animals. Taken together, we successfully infected adult mice with live EV71 and induced local inflammation using an AAV delivery system.
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Affiliation(s)
- Hung-Bo Hsiao
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
| | - Ai-Hsiang Chou
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
| | - Su-I Lin
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
| | - Shu-Pei Lien
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
| | - Chia-Chyi Liu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
| | - Pele Chong
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
- Graduate Institute of Immunology, China Medical University, Taichung 40402, Taiwan
| | - Chih-Yeh Chen
- Institutes of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
- Graduate Institute of Microbiology, National Taiwan University, Taipei 10051, Taiwan
| | - Mi-Hua Tao
- Institutes of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Shih-Jen Liu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan
- Graduate Institute of Immunology, China Medical University, Taichung 40402, Taiwan
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Lee YR, Wang PS, Wang JR, Liu HS. Enterovirus 71-induced autophagy increases viral replication and pathogenesis in a suckling mouse model. J Biomed Sci 2014; 21:80. [PMID: 25139436 PMCID: PMC4237791 DOI: 10.1186/s12929-014-0080-4] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 08/11/2014] [Indexed: 11/10/2022] Open
Abstract
Background We previously reported that Enterovirus 71 (EV71) infection activates autophagy, which promotes viral replication both in vitro and in vivo. In the present study we further investigated whether EV71 infection of neuronal SK-N-SH cells induces an autophagic flux. Furthermore, the effects of autophagy on EV71-related pathogenesis and viral load were evaluated after intracranial inoculation of mouse-adapted EV71 (MP4 strain) into 6-day-old ICR suckling mice. Results We demonstrated that in EV71-infected SK-N-SH cells, EV71 structural protein VP1 and nonstructural protein 2C co-localized with LC3 and mannose-6-phosphate receptor (MPR, endosome marker) proteins by immunofluorescence staining, indicating amphisome formation. Together with amphisome formation, EV71 induced an autophagic flux, which could be blocked by NH4Cl (inhibitor of acidification) and vinblastine (inhibitor of fusion), as demonstrated by Western blotting. Suckling mice intracranially inoculated with EV71 showed EV71 VP1 protein expression (representing EV71 infection) in the cerebellum, medulla, and pons by immunohistochemical staining. Accompanied with these infected brain tissues, increased expression of LC3-II protein as well as formation of LC3 aggregates, autophagosomes and amphisomes were detected. Amphisome formation, which was confirmed by colocalization of EV71-VP1 protein or LC3 puncta and the endosome marker protein MPR. Thus, EV71-infected suckling mice (similar to EV71-infected SK-N-SH cells) also show an autophagic flux. The physiopathological parameters of EV71-MP4 infected mice, including body weight loss, disease symptoms, and mortality were increased compared to those of the uninfected mice. We further blocked EV71-induced autophagy with the inhibitor 3-methyladenine (3-MA), which attenuated the disease symptoms and decreased the viral load in the brain tissues of the infected mice. Conclusions In this study, we reveal that EV71 infection of suckling mice induces an amphisome formation accompanied with the autophagic flux in the brain tissues. Autophagy induced by EV71 promotes viral replication and EV71-related pathogenesis.
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Affiliation(s)
| | | | | | - Hsiao-Sheng Liu
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Qin Y, Lin L, Chen Y, Wu S, Si X, Wu H, Zhai X, Wang Y, Tong L, Pan B, Zhong X, Wang T, Zhao W, Zhong Z. Curcumin inhibits the replication of enterovirus 71 in vitro. Acta Pharm Sin B 2014; 4:284-94. [PMID: 26579397 PMCID: PMC4629085 DOI: 10.1016/j.apsb.2014.06.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 06/06/2014] [Accepted: 06/20/2014] [Indexed: 11/16/2022] Open
Abstract
Human enterovirus 71 (EV71) is the main causative pathogen of hand, foot, and mouth disease (HFMD) in children. The epidemic of HFMD has been a public health problem in Asia-Pacific region for decades, and no vaccine and effective antiviral medicine are available. Curcumin has been used as a traditional medicine for centuries to treat a diversity of disorders including viral infections. In this study, we demonstrated that curcumin showed potent antiviral effect again EV71. In Vero cells infected with EV71, the addition of curcumin significantly suppressed the synthesis of viral RNA, the expression of viral protein, and the overall production of viral progeny. Similar with the previous reports, curcumin reduced the production of ROS induced by viral infection. However, the antioxidant property of curcumin did not contribute to its antiviral activity, since N-acetyl-l-cysteine, the potent antioxidant failed to suppress viral replication. This study also showed that extracellular signal-regulated kinase (ERK) was activated by either viral infection or curcumin treatment, but the activated ERK did not interfere with the antiviral effect of curcumin, indicating ERK is not involved in the antiviral mechanism of curcumin. Unlike the previous reports that curcumin inhibited protein degradation through ubiquitin–proteasome system (UPS), we found that curcumin had no impact on UPS in control cells. However, curcumin did reduce the activity of proteasomes which was increased by viral infection. In addition, the accumulation of the short-lived proteins, p53 and p21, was increased by the treatment of curcumin in EV71-infected cells. We further probed the antiviral mechanism of curcumin by examining the expression of GBF1 and PI4KB, both of which are required for the formation of viral replication complex. We found that curcumin significantly reduced the level of both proteins. Moreover, the decreased expression of either GBF1 or PI4KB by the application of siRNAs was sufficient to suppress viral replication. We also demonstrated that curcumin showed anti-apoptotic activity at the early stage of viral infection. The results of this study provide solid evidence that curcumin has potent anti-EV71 activity. Whether or not the down-regulated GBF1 and PI4KB by curcumin contribute to its antiviral effect needs further studies.
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Key Words
- Apoptosis
- CVB, coxsackieviurs B
- Curcumin
- DCFH-DA, dichloro-dihydro-fluorescein diacetate
- ERK, extracellular signal-regulated kinase
- EV71, enterovirus 71
- Enterovirus 71
- GBF1
- GBF1, Golgi brefeldin A resistant guanine nucleotide exchange factor 1
- GEF, guanine nucleotide exchange factor
- HBV, hepatitis B virus
- HCV, hepatitis C virus
- HFMD, hand, foot, and mouth disease
- HIV, human immunodeficiency virus
- HPV, human papillomavirus
- NAC, N-acetyl-l-cysteine
- PARP-1, poly(ADP-ribose) polymerase
- PGC-1α, peroxisome proliferator-activated receptor-gamma co-activator 1 alpha
- PI4KB
- PI4KB, phosphatidylinositol 4-kinase class III catalytic subunit β
- PI4P, phosphatidylinositol 4-phosphate
- ROS, reactive oxygen species
- SLLVY-AMC, succinyl-Leu-Leu-Val-Tyr-7-amino-4-methylcoumarin
- UPS, ubiquitin–proteasome system
- Ubiquitin–proteasome system
- Viral replication
- p.i., post-infection
- siRNA, small interfering RNA
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Coxsackievirus A 16 infection does not interfere with the specific immune response induced by an enterovirus 71 inactivated vaccine in rhesus monkeys. Vaccine 2014; 32:4436-4442. [DOI: 10.1016/j.vaccine.2014.06.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/30/2014] [Accepted: 06/11/2014] [Indexed: 02/01/2023]
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Wang YF, Yu CK. Animal models of enterovirus 71 infection: applications and limitations. J Biomed Sci 2014; 21:31. [PMID: 24742252 PMCID: PMC4013435 DOI: 10.1186/1423-0127-21-31] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 04/11/2014] [Indexed: 01/06/2023] Open
Abstract
Human enterovirus 71 (EV71) has emerged as a neuroinvasive virus that is responsible for several outbreaks in the Asia-Pacific region over the past 15 years. Appropriate animal models are needed to understand EV71 neuropathogenesis better and to facilitate the development of effective vaccines and drugs. Non-human primate models have been used to characterize and evaluate the neurovirulence of EV71 after the early outbreaks in late 1990s. However, these models were not suitable for assessing the neurovirulence level of the virus and were associated with ethical and economic difficulties in terms of broad application. Several strategies have been applied to develop mouse models of EV71 infection, including strategies that employ virus adaption and immunodeficient hosts. Although these mouse models do not closely mimic human disease, they have been applied to determine the pathogenesis of and treatment and prevention of the disease. EV71 receptor-transgenic mouse models have recently been developed and have significantly advanced our understanding of the biological features of the virus and the host-parasite interactions. Overall, each of these models has advantages and disadvantages, and these models are differentially suited for studies of EV71 pathogenesis and/or the pre-clinical testing of antiviral drugs and vaccines. In this paper, we review the characteristics, applications and limitation of these EV71 animal models, including non-human primate and mouse models.
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Affiliation(s)
| | - Chun-Keung Yu
- Center of Infectious Disease and Signaling Research, Collage of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Attenuation of human enterovirus 71 high-replication-fidelity variants in AG129 mice. J Virol 2014; 88:5803-15. [PMID: 24623423 DOI: 10.1128/jvi.00289-14] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
UNLABELLED In a screen for ribavirin resistance, a novel high-fidelity variant of human enterovirus 71 (EV71) with the single amino acid change L123F in its RNA-dependent RNA polymerase (RdRp or 3D) was identified. Based on the crystal structure of EV71 RdRp, L123 locates at the entrance of the RNA template binding channel, which might form a fidelity checkpoint. EV71 RdRp-L123F variants generated less progeny in a guanidine resistance assay and virus populations with lower mutation frequencies in cell culture passage due to their higher replication fidelity. However, compared with wild-type viruses, they did not show growth defects. In vivo infections further revealed that high-fidelity mutations L123F and G64R (previously reported) negatively impacted EV71 fitness and greatly reduced viral pathogenicity alone or together in AG129 mice. Interestingly, a variant with double mutations, RG/B4-G64R/L123F (where RG/B4 is an EV71 genotype B4 virus constructed by reverse genetics [RG])showed higher fidelity in vitro and less virulence in vivo than any one of the above two single mutants. The 50% lethal dose (LD50) of the double mutant increased more than 500 times compared with the LD50 of wild-type RG/B4 in mice. The results indicated that these high-fidelity variants exhibited an attenuated pathogenic phenotype in vivo and offer promise as a live attenuated EV71 vaccine. IMPORTANCE The error-prone nature of the RNA-dependent RNA polymerase (RdRp) of RNA viruses during replication results in quasispecies and aids survival of virus populations under a wide range of selective pressures. Virus variants with higher replication fidelity exhibit lower genetic diversity and attenuated pathogenicity in vivo. Here, we identified a novel high-fidelity mutation L123F in the RdRp of human enterovirus 71 (EV71). We further elucidated that EV71 variants with the RdRp-L123F mutation and/or the previously identified high-fidelity mutation RdRp-G64R were attenuated in an AG129 mouse model. As EV71 has emerged as a serious worldwide health threat, especially in developing countries in the Asia-Pacific region, we urgently need EV71 vaccines. Learning from the poliovirus vaccination, we prefer live attenuated EV71 vaccines to inactivated EV71 vaccines in order to effectively control EV71 outbreaks at low cost. Our results imply a new means of attenuating EV71 and reducing its mutation rate at the same time.
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Zhang Y, Yang E, Pu J, Liu L, Che Y, Wang J, Liao Y, Wang L, Ding D, Zhao T, Ma N, Song M, Wang X, Shen D, Tang D, Huang H, Zhang Z, Chen D, Feng M, Li Q. The gene expression profile of peripheral blood mononuclear cells from EV71-infected rhesus infants and the significance in viral pathogenesis. PLoS One 2014; 9:e83766. [PMID: 24392094 PMCID: PMC3879270 DOI: 10.1371/journal.pone.0083766] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 11/07/2013] [Indexed: 12/03/2022] Open
Abstract
Enterovirus 71 (EV71) is the major pathogen responsible for fatal hand, foot and mouth disease (HFMD). Our previous work reported on an EV71-infected rhesus monkey infant model that presented with histo-pathologic changes of the central nervous system (CNS) and lungs. This study is focused on the correlated modulation of gene expression in the peripheral blood mononuclear cells (PBMCs) from EV71-infected rhesus monkey infants. The expression of more than 500 functional genes associated with multiple pathways was modulated. The expression of genes associated with immune inflammatory responses was up-regulated during the period from days 4 to 10 post-infection. The expression of two genes (TAC1 and IL17A), which play major roles in inflammatory reactions, was remarkably up-regulated during the infection period. Furthermore, a higher expression level of the TAC1 gene was identified in the CNS compared to the lungs, but a high expression level of the IL-17A gene was observed in the lungs and not in the CNS. The results of this study suggest at least two facts about EV71 infection, which are that: the TAC1 gene that encodes substance P and neurokinin-A is present in both PBMCs and the hypothalamus; and the up-regulation of IL-17A is sustained in the peripheral blood.
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Affiliation(s)
- Ying Zhang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Erxia Yang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Jing Pu
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Longding Liu
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Yanchun Che
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Jingjing Wang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Yun Liao
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Lichun Wang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Dong Ding
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Ting Zhao
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Na Ma
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Ming Song
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Xi Wang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Dong Shen
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Donghong Tang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Hongtai Huang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Zhixiao Zhang
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
| | - Dai Chen
- Department of Bioinformatic analyses, Novel Bioinformatics Co., Ltd, Shanghai, China
| | - Mingfei Feng
- Department of Bioinformatic analyses, Novel Bioinformatics Co., Ltd, Shanghai, China
| | - Qihan Li
- Yunnan Key Laboratory of Vaccine Research & Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, Kunming, China
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49
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Liang ZL, Mao QY, Wang YP, Zhu FC, Li JX, Yao X, Gao F, Wu X, Xu M, Wang JZ. Progress on the research and development of inactivated EV71 whole-virus vaccines. Hum Vaccin Immunother 2013; 9:1701-5. [PMID: 23744508 PMCID: PMC3906269 DOI: 10.4161/hv.24949] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 05/06/2013] [Indexed: 12/12/2022] Open
Abstract
The prevalence of diseases caused by EV71 infection has become a serious public health problem in the Western Pacific region. Due to a lack of effective treatment options, controlling EV71 epidemics has mainly focused on the research and development (R&D) of EV71 vaccines. Thus far, five organizations have completed pre-clinical studies focused on the development of inactivated EV71 whole-virus vaccines, including vaccine strain screening, process optimization, safety and immunogenicity evaluation, and are in different stages of clinical trials. Among these organizations, three companies in Mainland China [Beijing Vigoo Biological Co., Ltd. (Vigoo), Sinovac Biotech Ltd. (Sinovac) and Institute of Medical Biology, Chinese Academy of Medical Science (CAMS)] have recently completed Phase III trials for the vaccines they developed. In addition, the other two vaccines, developed by National Health Research Institutes (NHRI) of Taiwan and Inviragen Pte., Ltd (Inviragen), of Singapore, have also completed Phase I clinical trials. Published clinical trial results indicate that the inactivated EV71 vaccines have good safety and immunogenicity in the target population (infants) and confer a relatively high rate of protection against EV71 infection-related diseases. The results of clinical trials suggest a promising future for the clinical use of EV71 vaccines. Here, we review and highlight the recent progress on the R&D of inactivated EV71 whole-virus vaccines.
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Affiliation(s)
- Zheng-Lun Liang
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Qun-Ying Mao
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Yi-Ping Wang
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Feng-Cai Zhu
- Jiangsu Provincial Center for Disease Control and Prevention; Nanjing, P.R. China
| | - Jing-Xin Li
- Jiangsu Provincial Center for Disease Control and Prevention; Nanjing, P.R. China
| | - Xin Yao
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Fan Gao
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Xing Wu
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Miao Xu
- National Institutes for Food and Drug Control; Beijing, P.R. China
| | - Jun-Zhi Wang
- National Institutes for Food and Drug Control; Beijing, P.R. China
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50
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Wang J, Pu J, Huang H, Zhang Y, Liu L, Yang E, Zhou X, Ma N, Zhao H, Wang L, Xie Z, Tang D, Li Q. EV71-infected CD14(+) cells modulate the immune activity of T lymphocytes in rhesus monkeys. Emerg Microbes Infect 2013; 2:e44. [PMID: 26038477 PMCID: PMC3820984 DOI: 10.1038/emi.2013.44] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 05/15/2013] [Accepted: 06/14/2013] [Indexed: 12/23/2022]
Abstract
Preliminary studies of the major pathogen enterovirus 71 (EV71), a member of the Picornaviridae family, have suggested that EV71 may be a major cause of fatal hand, foot and mouth disease cases. Currently, the role of the pathological changes induced by EV71 infection in the immunopathogenic response remains unclear. Our study focused on the interaction between this virus and immunocytes and indicated that this virus has the ability to replicate in CD14+ cells. Furthermore, these EV71-infected CD14+ cells have the capacity to stimulate the proliferation of T cells and to enhance the release of certain functional cytokines. An adaptive immune response induced by the back-transfusion of EV71-infected CD14+ cells was observed in donor neonatal rhesus monkeys. Based on these observations, the proposed hypothesis is that CD14+ cells infected by the EV71 virus might modulate the anti-EV71 adaptive immune response by inducing simultaneous T-cell activation.
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Affiliation(s)
- Jingjing Wang
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Jing Pu
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Hongtai Huang
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Ying Zhang
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Longding Liu
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Erxia Yang
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Xiaofang Zhou
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Na Ma
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Hongling Zhao
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Lichun Wang
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Zhenfeng Xie
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Donghong Tang
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
| | - Qihan Li
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, , Kunming 650118, China
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