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Knobel DL, Jackson AC, Bingham J, Ertl HCJ, Gibson AD, Hughes D, Joubert K, Mani RS, Mohr BJ, Moore SM, Rivett-Carnac H, Tordo N, Yeates JW, Zambelli AB, Rupprecht CE. A One Medicine Mission for an Effective Rabies Therapy. Front Vet Sci 2022; 9:867382. [PMID: 35372555 PMCID: PMC8967983 DOI: 10.3389/fvets.2022.867382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 02/14/2022] [Indexed: 11/13/2022] Open
Abstract
Despite the disease's long history, little progress has been made toward a treatment for rabies. The prognosis for patient recovery remains dire. For any prospect of survival, patients require aggressive critical care, which physicians in rabies endemic areas may be reluctant or unable to provide given the cost, clinical expertise required, and uncertain outcome. Systematic clinical research into combination therapies is further hampered by sporadic occurrence of cases. In this Perspective, we examine the case for a One Medicine approach to accelerate development of an effective therapy for rabies through the veterinary care and investigational treatment of naturally infected dogs in appropriate circumstances. We review the pathogenesis of rabies virus in humans and dogs, including recent advances in our understanding of the molecular basis for the severe neurological dysfunction. We propose that four categories of disease process need to be managed in patients: viral propagation, neuronal degeneration, inflammation and systemic compromise. Compassionate critical care and investigational treatment of naturally infected dogs receiving supportive therapy that mimics the human clinical scenario could increase opportunities to study combination therapies that address these processes, and to identify biomarkers for prognosis and therapeutic response. We discuss the safety and ethics of this approach, and introduce the Canine Rabies Treatment Initiative, a non-profit organization with the mission to apply a One Medicine approach to the investigation of diagnostic, prognostic, and therapeutic options for rabies in naturally infected dogs, to accelerate transformation of rabies into a treatable disease for all patients.
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Affiliation(s)
- Darryn L. Knobel
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, Basseterre, Saint Kitts and Nevis
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
- Canine Rabies Treatment Initiative, Salt Rock, South Africa
- *Correspondence: Darryn L. Knobel ;
| | - Alan C. Jackson
- Department of Medicine, Northern Consultation Centre, Thompson General Hospital, Thompson, MB, Canada
- Department of Medicine, Lake of the Woods District Hospital, Kenora, ON, Canada
| | - John Bingham
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Australian Animal Health Laboratory at the Australian Centre for Disease Preparedness, Geelong, VIC, Australia
| | | | - Andrew D. Gibson
- Division of Genetics and Genomics, Easter Bush Veterinary Centre, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Roslin, United Kingdom
| | - Daniela Hughes
- Canine Rabies Treatment Initiative, Salt Rock, South Africa
| | - Kenneth Joubert
- Veterinary Anaesthesia, Analgesia and Critical Care Services, Lonehill, South Africa
| | - Reeta S. Mani
- Department of Neurovirology, WHO Collaborating Centre for Reference and Research in Rabies, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Bert J. Mohr
- Canine Rabies Treatment Initiative, Salt Rock, South Africa
- Centre for Animal Research, Faculty of Health Sciences, University of Cape Town, Observatory, South Africa
| | - Susan M. Moore
- Veterinary Medical Diagnostic Laboratory, University of Missouri, Columbia, MO, United States
| | | | - Noël Tordo
- Institut Pasteur de Guinée, Conakry, Guinea
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Brito CVB, Rodrigues ÉDL, Martins FMS, Tavares LD, Lima ALDSN, Ferreira LC, Santana CJL, de Brito JAGDSM, Casseb LMN, Diniz JAP. Immunological impact of tetrahydrobiopterin on the central nervous system in a murine model of rabies virus infection. Rev Inst Med Trop Sao Paulo 2021; 63:e28. [PMID: 33852711 PMCID: PMC8046507 DOI: 10.1590/s1678-9946202163028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 03/15/2021] [Indexed: 11/21/2022] Open
Abstract
Currently, the Milwaukee protocol presents healing results in human beings affected by the rabies virus. However, there are many points to clarify on the action of drugs and the immune mechanism involved in the evolution of the disease. One of the drugs used is biopterin, which is an important cofactor for nitric oxide, important for preventing vasospasm. Thus, we describe the effect of biopterin on some inflammatory factors in a rabies virus infection developed in an animal model. The immunological mediators studied in animals infected with rabies virus submitted to doses of sapropterin were Anti-RABV, IL-6, IL-2, IL-17a, INF-gamma and Anti-iNOS. It is suggested that the medication in the context of a RABV infection already installed, had the effect of modulating the inflammatory mechanisms mainly linked to the permeability of the blood-brain barrier and the migration of cytotoxic cells.
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Affiliation(s)
| | - Érika Dayane Leal Rodrigues
- Universidade Federal do Pará, Programa de Biologia e Agente
Infeciosos e Parasitários, Ananindeua, Pará, Brazil
| | | | - Lavinia Dias Tavares
- Instituto Evandro Chagas, Programa de Iniciação Científica,
Ananindeua, Pará, Brazil
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Sundaramoorthy V, Godde N, J. Farr R, Green D, M. Haynes J, Bingham J, O’Brien CM, Dearnley M. Modelling Lyssavirus Infections in Human Stem Cell-Derived Neural Cultures. Viruses 2020; 12:E359. [PMID: 32218146 PMCID: PMC7232326 DOI: 10.3390/v12040359] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 03/02/2020] [Accepted: 03/20/2020] [Indexed: 12/20/2022] Open
Abstract
Rabies is a zoonotic neurological infection caused by lyssavirus that continues to result in devastating loss of human life. Many aspects of rabies pathogenesis in human neurons are not well understood. Lack of appropriate ex-vivo models for studying rabies infection in human neurons has contributed to this knowledge gap. In this study, we utilize advances in stem cell technology to characterize rabies infection in human stem cell-derived neurons. We show key cellular features of rabies infection in our human neural cultures, including upregulation of inflammatory chemokines, lack of neuronal apoptosis, and axonal transmission of viruses in neuronal networks. In addition, we highlight specific differences in cellular pathogenesis between laboratory-adapted and field strain lyssavirus. This study therefore defines the first stem cell-derived ex-vivo model system to study rabies pathogenesis in human neurons. This new model system demonstrates the potential for enabling an increased understanding of molecular mechanisms in human rabies, which could lead to improved control methods.
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Affiliation(s)
- Vinod Sundaramoorthy
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory (AAHL), East Geelong, VIC 3219, Australia; (V.S.); (N.G.); (R.J.F.); (D.G.); (J.B.)
| | - Nathan Godde
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory (AAHL), East Geelong, VIC 3219, Australia; (V.S.); (N.G.); (R.J.F.); (D.G.); (J.B.)
| | - Ryan J. Farr
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory (AAHL), East Geelong, VIC 3219, Australia; (V.S.); (N.G.); (R.J.F.); (D.G.); (J.B.)
| | - Diane Green
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory (AAHL), East Geelong, VIC 3219, Australia; (V.S.); (N.G.); (R.J.F.); (D.G.); (J.B.)
| | - John M. Haynes
- Monash Institute of Pharmaceutical Sciences, 399 Royal Parade, Parkville, VIC 3052, Australia;
| | - John Bingham
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory (AAHL), East Geelong, VIC 3219, Australia; (V.S.); (N.G.); (R.J.F.); (D.G.); (J.B.)
| | - Carmel M. O’Brien
- CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3168, Australia
| | - Megan Dearnley
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory (AAHL), East Geelong, VIC 3219, Australia; (V.S.); (N.G.); (R.J.F.); (D.G.); (J.B.)
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4
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Long T, Zhang B, Fan R, Wu Y, Mo M, Luo J, Chang Y, Tian Q, Mei M, Jiang H, Luo Y, Guo X. Phosphoprotein Gene of Wild-Type Rabies Virus Plays a Role in Limiting Viral Pathogenicity and Lowering the Enhancement of BBB Permeability. Front Microbiol 2020; 11:109. [PMID: 32153520 PMCID: PMC7045047 DOI: 10.3389/fmicb.2020.00109] [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: 09/16/2019] [Accepted: 01/17/2020] [Indexed: 12/14/2022] Open
Abstract
Enhancement of blood–brain barrier (BBB) permeability is necessary for clearing virus in the central nervous system (CNS). It has been reported that only laboratory-attenuated rabies virus (RABV) induces inflammatory response to lead BBB transient breakdown rather than wild-type (wt) strains. As a component of ribonucleoprotein (RNP), phosphoprotein (P) of RABV plays a key role in viral replication and pathogenicity. To our knowledge, the function of RABV P gene during RABV invasion was unclear so far. In order to determine the role of RABV P gene during RABV infection, we evaluated the BBB permeability in vivo after infection with wt RABV strain (GD-SH-01), a lab-attenuated RABV strain (HEP-Flury), and a chimeric RABV strain (rHEP-SH-P) whose P gene cloned from GD-SH-01 was expressed in the genomic backbone of HEP-Flury. We found that rHEP-SH-P caused less enhancement of BBB permeability and was less pathogenic to adult mice than GD-SH-01 and HEP-Flury. In an effort to investigate the mechanism, we found that the replication of rHEP-SH-P has been limited due to the suppressed P protein expression and induced less response to maintain BBB integrity. Our data indicated that the P gene of wt RABV was a potential determinant in hampering viral replication in vivo, which kept BBB integrity. These findings provided an important foundation for understanding the viral invasion and development of novel vaccine.
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Affiliation(s)
- Teng Long
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Boyue Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Ruqi Fan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yuting Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Meijun Mo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Jun Luo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yiran Chang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Qin Tian
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Mingzhu Mei
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - He Jiang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yongwen Luo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Xiaofeng Guo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
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5
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Martina BEE, Smreczak M, Orlowska A, Marzec A, Trebas P, Roose JM, Zmudzinski J, Gerhauser I, Wohlsein P, Baumgärtner W, Osterhaus ADME, Koraka P. Combination drug treatment prolongs survival of experimentally infected mice with silver-haired bat rabies virus. Vaccine 2019; 37:4736-4742. [PMID: 29843998 DOI: 10.1016/j.vaccine.2018.05.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 04/24/2018] [Accepted: 05/12/2018] [Indexed: 01/06/2023]
Abstract
Rabies is a lethal disease in humans and animals, killing approximately 60,000 people every year. Currently, there is no treatment available, except post-exposure prophylaxis (PEP) that can be administered whenever exposure to a rabid animal took place. Here we describe the beneficial effects of a combination treatment initiated at day 4 post infection, containing anti-viral drugs and immune modulators in infected mice. Combination therapy resulted in significant increase in survival time (P < 0.05) and significantly lowers viral RNA in the brain and spinal cord (P < 0.05). Furthermore, treatment influenced markers of pyroptosis and apoptosis and early inflammatory response as measured by the levels of TNF-α. Morphological lesions were absent in rabies virus infected mice with few signs of inflammation. However, these were not significant between the different groups.
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Affiliation(s)
- Byron E E Martina
- Artemis One Health Research Foundation, Delft, The Netherlands; Erasmus Medical Centre Rotterdam, The Netherlands
| | - Marcin Smreczak
- Department of Virology, National Veterinary Research Institute, Partyzantów 57 Avenue, 24-100 Puławy, Poland
| | - Anna Orlowska
- Department of Virology, National Veterinary Research Institute, Partyzantów 57 Avenue, 24-100 Puławy, Poland
| | - Anna Marzec
- Department of Virology, National Veterinary Research Institute, Partyzantów 57 Avenue, 24-100 Puławy, Poland
| | - Pawel Trebas
- Department of Virology, National Veterinary Research Institute, Partyzantów 57 Avenue, 24-100 Puławy, Poland
| | - Jouke M Roose
- Artemis One Health Research Foundation, Delft, The Netherlands
| | - Jan Zmudzinski
- Department of Virology, National Veterinary Research Institute, Partyzantów 57 Avenue, 24-100 Puławy, Poland
| | - Ingo Gerhauser
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Peter Wohlsein
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Wolfgang Baumgärtner
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany; Center for Systems Neuroscience (ZSN), Hannover, Germany
| | - Albert D M E Osterhaus
- Artemis One Health Research Foundation, Delft, The Netherlands; Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine, Hannover, Germany
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Farahtaj F, Alizadeh L, Gholami A, Tahamtan A, Shirian S, Fazeli M, Nejad ASM, Gorji A, Niknam HM, Ghaemi A. Natural Infection with Rabies Virus: A Histopathological and Immunohistochemical Study of Human Brains. Osong Public Health Res Perspect 2019; 10:6-11. [PMID: 30847265 PMCID: PMC6396821 DOI: 10.24171/j.phrp.2019.10.1.03] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Objectives Despite all the efforts and increased knowledge of rabies, the exact mechanisms of infection and mortality from the rabies virus are not well understood. To understand the mechanisms underlying the pathogenicity of rabies virus infection, it is crucial to study the tissue that the rabies virus naturally infects in humans. Methods Cerebellum brain tissue from 9 human post mortem cases from Iran, who had been infected with rabies virus, were examined histopathologically and immunohistochemically to evaluate the innate immune responses against the rabies virus. Results Histopathological examination revealed inflammation of the infected cerebellum and immunohistochemical analyses showed an increased immunoreactivity of heat shock protein 70, interleukin-6, interleukin-1, tumor necrosis factor-alpha, caspase-3, caspase-9, toll-like receptor3 and toll-like receptor4 in the infected brain tissue. Conclusion These results indicated the involvement of innate immunity in rabies infected human brain tissue, which may aggravate the progression of this deadly disease.
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Affiliation(s)
- Firouzeh Farahtaj
- Collaborating Center for Reference and Research on Rabies, Pasteur Institute of Iran, Tehran, Iran
| | - Leila Alizadeh
- Shefa Neuroscience Research Center, Khatam Alanbia Hospital, Tehran, Iran
| | - Alireza Gholami
- Collaborating Center for Reference and Research on Rabies, Pasteur Institute of Iran, Tehran, Iran
| | - Alireza Tahamtan
- Department of Virology, Golestan University of Medical Sciences, Gorgan, Iran
| | - Sadegh Shirian
- Department of Pathology, School of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
| | - Maryam Fazeli
- Collaborating Center for Reference and Research on Rabies, Pasteur Institute of Iran, Tehran, Iran
| | - Amir Sasan Mozaffari Nejad
- Molecular Research Center, Student Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ali Gorji
- Shefa Neuroscience Research Center, Khatam Alanbia Hospital, Tehran, Iran.,Department of Neurosurgery and Neurology, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | | | - Amir Ghaemi
- Department of Virology, Pasteur Institute of Iran, Tehran, Iran
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7
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Immunological aspects of rabies: a literature review. Arch Virol 2017; 162:3251-3268. [PMID: 28726129 DOI: 10.1007/s00705-017-3484-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/27/2017] [Indexed: 02/08/2023]
Abstract
Rabies is a lethal disease caused by the neurotropic virus rabies virus (RABV), and it remains an important public health problem globally. It is known that the host immune response is important for control of viral infection and promoting viral clearance. In this context, it is well documented that, in addition to RABV neutralizing antibody, interferons and cell-mediated immunity also have an important role in preventing the establishment of disease. On the other hand, RABV suppresses host immunity through different mechanisms, for example, direct inhibition of host gene expression, sequestration of pathogen-associated molecular patterns, or modification of cytokine signalling pathways, which hinder the protective host immune responses to RABV infection. Here, we review the immunological aspects of rabies, highlighting innate and adaptive immunity, as well as the host evasion immune mechanisms used by the virus. Finally, we briefly discuss how this knowledge can direct new research and be harnessed for future therapeutic strategies.
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Abstract
Human rabies encephalitis is rare in Canada, with only five cases reported in the past 30 years. The first and only patient who contracted rabies encephalitis in British Columbia died in 2003. Here we provide the first detailed clinical and pathological description of that case, which had several unusual features, including preexisting immunosuppression, paralytic presentation, prolonged survival, focal lesions on neuroimaging and severe neuropathology with focal necrosis, intense inflammation, and abundant viral inclusion bodies.
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Huang CT, Li Z, Huang Y, Zhang G, Zhou M, Chai Q, Wu H, Fu ZF. Enhancement of blood-brain barrier permeability is required for intravenously administered virus neutralizing antibodies to clear an established rabies virus infection from the brain and prevent the development of rabies in mice. Antiviral Res 2014; 110:132-41. [PMID: 25108172 PMCID: PMC4171353 DOI: 10.1016/j.antiviral.2014.07.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 07/21/2014] [Accepted: 07/23/2014] [Indexed: 02/06/2023]
Abstract
Rabies virus (RABV) is a neurotropic virus that causes fatal disease in humans and animals. Currently there is no cure for rabies once clinical signs appear. It is believed that once RABV enters the central nervous system (CNS), virus neutralizing antibodies (VNAs) in the periphery cannot pass through the blood-brain barrier (BBB) and into the CNS. Furthermore, it has been hypothesized that VNAs produced in the CNS by invading B cells, rather than those produced in the periphery and then transported into the CNS, are important in clearing RABV from the CNS. In the present study, mouse serum containing VNA was administered intravenously into mice after infection with wild-type RABV. Our studies demonstrate that exogenous administration of VNAs is crucial in the clearance of RABV from the brain and prevent the development of rabies in both immunocompetent and immunocompromised mice as long as the BBB permeability remains enhanced. This present study therefore provides a foundation for the possibility of developing VNA therapy for clinical rabies in humans.
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Affiliation(s)
- Chien-Tsun Huang
- Department of Pathology, University of Georgia, Athens, GA 30602, USA
| | - Zhenguang Li
- Department of Pathology, University of Georgia, Athens, GA 30602, USA; State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, Jilin 130122, China
| | - Ying Huang
- Department of Pathology, University of Georgia, Athens, GA 30602, USA
| | - Guoqing Zhang
- Department of Pathology, University of Georgia, Athens, GA 30602, USA
| | - Ming Zhou
- Department of Pathology, University of Georgia, Athens, GA 30602, USA
| | - Qingqing Chai
- Department of Pathology, University of Georgia, Athens, GA 30602, USA
| | - Hua Wu
- State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, Jilin 130122, China
| | - Zhen F Fu
- Department of Pathology, University of Georgia, Athens, GA 30602, USA; State Key Laboratory of Agricultural Microbiology, Key Laboratory of Development of Veterinary Diagnostic Products, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China.
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10
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Survival from rabies encephalitis. J Neurol Sci 2014; 339:8-14. [PMID: 24582283 DOI: 10.1016/j.jns.2014.02.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 01/29/2014] [Accepted: 02/14/2014] [Indexed: 12/25/2022]
Abstract
Rabies is a major public health problem in Asia and Africa, with nearly 60,000 deaths every year, and represents a substantial economic burden. Neurologists frequently encounter atypical cases, and need to make informed decisions regarding diagnosis and management. No therapy has been shown to unequivocally improve survival in rabies till date. Despite the overwhelmingly fatal nature of this disease, a small number of patients have been reported to survive acute rabies encephalitis with varying degrees of neurological sequelae. This paper presents the eleventh documented case of survival from rabies, which developed after being bitten by a stray dog, albeit with severe neurological residua. Similar to patients in previous reports, this man demonstrated a robust immune response as indicated by peripheral viral clearance and very high serum and cerebrospinal fluid antibody titres. Immunologically-mediated virus clearance therefore appears to be a prerequisite for survival. A detailed review of previously reported survivors, as well as descriptions of the host response and viral clearance in human rabies, current therapy for this disease and future directions in improving the currently dismal prognosis are provided.
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11
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Papaneri AB, Wirblich C, Marissen WE, Schnell MJ. Alanine scanning of the rabies virus glycoprotein antigenic site III using recombinant rabies virus: implication for post-exposure treatment. Vaccine 2013; 31:5897-902. [PMID: 24120673 DOI: 10.1016/j.vaccine.2013.09.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/13/2013] [Accepted: 09/18/2013] [Indexed: 12/25/2022]
Abstract
The safety and availability of the human polyclonal sera that is currently utilized for post-exposure treatment (PET) of rabies virus (RABV) infection remain a concern. Recombinant monoclonal antibodies have been postulated as suitable alternatives by WHO. To this extent, CL184, the RABV human antibody combination comprising monoclonal antibodies (mAbs) CR57 and CR4098, has been developed and has delivered promising clinical data to support its use for RABV PET. For this fully human IgG1 cocktail, mAbs CR57 and CR4098 are produced in the PER.C6 human cell line and combined in equal amounts in the final product. During preclinical evaluation, CR57 was shown to bind to antigenic site I whereas CR4098 neutralization was influenced by a mutation of position 336 (N336) located within antigenic site III. Here, alanine scanning was used to analyze the influence of mutations within the potential binding site for CR4098, antigenic site III, in order to evaluate the possibility of mutated rabies viruses escaping neutralization. For this approach, twenty flanking amino acids (10 upstream and 10 downstream) of the RABV glycoprotein (G) asparagine (N336) were exchanged to alanine (or serine, if already alanine) by site-directed mutagenesis. Analysis of G expression revealed four of the twenty mutant Gs to be non-functional, as shown by their lack of cell surface expression, which is a requirement for the production of infectious RABV. Therefore, these mutants were excluded from further study. The remaining sixteen mutants were introduced in an infectious clone of RABV, and recombinant RABVs (rRABVs) were recovered and utilized for in vitro neutralization assays. All of the viruses were effectively neutralized by CR4098 as well as by CR57, indicating that single amino acid exchanges in this region does not affect the broad neutralizing capability of the CL184 mAb combination.
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Affiliation(s)
- Amy B Papaneri
- Department of Microbiology and Immunology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA
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13
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Davis AD, Gordy PA, Bowen RA. Unique characteristics of bat rabies viruses in big brown bats (Eptesicus fuscus). Arch Virol 2012. [PMID: 23208279 DOI: 10.1007/s00705-012-1551-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Rabies virus infection has been documented in several North American bat species, including Eptesicus fuscus. The virus-host relationship between bats and rabies virus (RV) is not well understood. The incidence of non-lethal RV exposure, based on the presence of viral neutralizing antibodies, demonstrates that exposure to RV does not always lead to clinical infection in bats. It is unknown how the route of exposure, rabies virus variant, or health of the bat affects the outcome following exposure. This paper describes the pathogenesis of two big brown bat RV variants in homologous host species. Our study demonstrates that RV variants obtained from the same species of bat from similar geographical areas may result in a diverse clinical progression of disease.
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Affiliation(s)
- April D Davis
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80524, USA.
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14
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Evidence for a 4-dose vaccine schedule for human rabies post-exposure prophylaxis in previously non-vaccinated individuals. Vaccine 2009; 27:7141-8. [DOI: 10.1016/j.vaccine.2009.09.029] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2009] [Accepted: 09/03/2009] [Indexed: 11/18/2022]
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15
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Hooper DC, Phares TW, Fabis MJ, Roy A. The production of antibody by invading B cells is required for the clearance of rabies virus from the central nervous system. PLoS Negl Trop Dis 2009; 3:e535. [PMID: 19806203 PMCID: PMC2754506 DOI: 10.1371/journal.pntd.0000535] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Accepted: 09/24/2009] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND The pathogenesis of rabies is associated with the inability to deliver immune effectors across the blood-brain barrier and to clear virulent rabies virus from CNS tissues. However, the mechanisms that facilitate immune effector entry into CNS tissues are induced by infection with attenuated rabies virus. METHODOLOGY/PRINCIPAL FINDINGS Infection of normal mice with attenuated rabies virus but not immunization with killed virus can promote the clearance of pathogenic rabies virus from the CNS. T cell activity in B cell-deficient mice can control the replication of attenuated virus in the CNS, but viral mRNA persists. Low levels of passively administered rabies virus-neutralizing antibody reach infected cells in the cerebellum of B cell-deficient mice but are not sufficient to mediate virus clearance. Production of rabies virus-specific antibody by B cells invading CNS tissues is required for this process, and a substantial proportion of the B cells that accumulate in the CNS of mice infected with attenuated rabies virus produce virus-specific antibodies. CONCLUSIONS/SIGNIFICANCE The mechanisms required for immune effectors to enter rabies virus-infected tissues are induced by infection with attenuated rabies virus but not by infection with pathogenic rabies viruses or immunization with killed virus. T cell activities can inhibit rabies virus replication, but the production of rabies virus-specific antibodies by infiltrating B cells, as opposed to the leakage of circulating antibody across the BBB, is critical to elimination of the virus. These findings suggest that a pathogenic rabies virus infection may be treatable after the virus has reached the CNS tissues, providing that the appropriate immune effectors can be targeted to the infected tissues.
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Affiliation(s)
- D Craig Hooper
- Center for Neurovirology, Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.
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Zandi F, Eslami N, Soheili M, Fayaz A, Gholami A, Vaziri B. Proteomics analysis of BHK-21 cells infected with a fixed strain of rabies virus. Proteomics 2009; 9:2399-407. [PMID: 19322775 DOI: 10.1002/pmic.200701007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Rabies is a neurotropic virus that causes a life threatening acute viral encephalitis. The complex relationship of rabies virus (RV) with the host leads to its replication and spreading toward the neural network, where viral pathogenic effects appeared as neuronal dysfunction. In order to better understand the molecular basis of this relationship, a proteomics study on baby hamster kidney cells infected with challenge virus standard strain of RV was performed. This cell line is an in vitro model for rabies infection and is commonly used for viral seed preparation. The direct effect of the virus on cellular protein machinery was investigated by 2-DE proteome mapping of infected versus control cells followed by LC-MS/MS identification. This analysis revealed significant changes in expression of 14 proteins, seven of these proteins were viral and the remaining were host proteins with different known functions: cytoskeletal (capping protein, vimentin), anti-oxidative stress (superoxide dismutase), regulatory (Stathmin), and protein synthesis (P0). Despite of limited changes appeared upon rabies infection, they present a set of interesting biochemical pathways for further investigation on viral-host interaction.
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Affiliation(s)
- Fatemeh Zandi
- Protein Chemistry Unit, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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Frymus T, Addie D, Belák S, Boucraut-Baralon C, Egberink H, Gruffydd-Jones T, Hartmann K, Hosie MJ, Lloret A, Lutz H, Marsilio F, Pennisi MG, Radford AD, Thiry E, Truyen U, Horzinek MC. Feline Rabies: ABCD Guidelines on Prevention and Management. J Feline Med Surg 2009; 11:585-93. [DOI: 10.1016/j.jfms.2009.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Overview Rabies virus belongs to the genus Lyssavirus, together with European bat lyssaviruses 1 and 2. In clinical practice, rabies virus is easily inactivated by detergent-based disinfectants. Infection Rabid animals are the only source of infection. Virus is shed in the saliva some days before the onset of clinical signs and transmitted through a bite or a scratch to the skin or mucous membranes. The average incubation period in cats is 2 months, but may vary from 2 weeks to several months, or even years. Disease signs Any unexplained aggressive behaviour or sudden behavioural change in cats must be considered suspicious. Two disease manifestations have been identified in cats: the furious and the dumb form. Death occurs after a clinical course of 1–10 days. Diagnosis A definitive rabies diagnosis is obtained by post-mortem laboratory investigation. However, serological tests are used for post-vaccinal control, especially in the context of international movements. Disease management Post-exposure vaccination of cats depends on the national public health regulations, and is forbidden in many countries.
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Saxena S, Dahiya SS, Sonwane AA, Patel CL, Saini M, Rai A, Gupta PK. A sindbis virus replicon-based DNA vaccine encoding the rabies virus glycoprotein elicits immune responses and complete protection in mice from lethal challenge. Vaccine 2009; 26:6592-601. [PMID: 18848857 DOI: 10.1016/j.vaccine.2008.09.055] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2008] [Revised: 09/14/2008] [Accepted: 09/15/2008] [Indexed: 11/17/2022]
Abstract
A sindbis virus replicon-based DNA vaccine encoding rabies virus glycoprotein (G) was developed by subcloning rabies G gene into a sindbis virus replicon-based vaccine vector (pAlpha). The self-amplification of RNA transcripts and translation efficiency of rabies G was analyzed in pAlpha-Rab-G-transfected mammalian cells using RT-PCR, SDS-PAGE and Western blot analysis. The transfected cells also showed induction of apoptosis which is an important event in the enhancement of immune responses. Further, immune responses induced with replicon-based rabies DNA vaccine (pAlpha-Rab-G) was compared with conventional rabies DNA vaccine and commercial cell culture vaccine (Rabipur) in intramuscularly injected mice. The mice immunized with replicon-based rabies DNA vaccine induced humoral and cell mediated immune responses better than conventional rabies DNA vaccine however, comparable to Rabipur vaccine. On challenge with rabies virus CVS strain, replicon-based rabies DNA vaccine conferred complete protection similar to Rabipur. These results demonstrate that replicon-based rabies DNA vaccine is effective in inducing both humoral and cellular immune responses and can be considered as effective vaccine against rabies.
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Affiliation(s)
- Sonal Saxena
- Division of Animal Biotechnology, Indian Veterinary Research Institute, Izatnagar 243122, India
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Induction of immune responses and protection in mice against rabies using a self-replicating RNA vaccine encoding rabies virus glycoprotein. Vet Microbiol 2009; 136:36-44. [DOI: 10.1016/j.vetmic.2008.10.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Revised: 10/19/2008] [Accepted: 10/28/2008] [Indexed: 11/23/2022]
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Rabies vaccines. Vaccines (Basel) 2008. [DOI: 10.1016/b978-1-4160-3611-1.50031-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
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Vuaillat C, Varrin-Doyer M, Bernard A, Sagardoy I, Cavagna S, Chounlamountri I, Lafon M, Giraudon P. High CRMP2 expression in peripheral T lymphocytes is associated with recruitment to the brain during virus-induced neuroinflammation. J Neuroimmunol 2007; 193:38-51. [PMID: 18006081 DOI: 10.1016/j.jneuroim.2007.09.033] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 09/10/2007] [Accepted: 09/28/2007] [Indexed: 12/25/2022]
Abstract
Collapsin Response Mediator Protein (CRMP)-2 is involved in T-cell polarization and migration. To address the role of CRMP2 in neuroinflammation, we analyzed its involvement in lymphocyte recruitment to the central nervous system in mouse infected with neurotropic and non-neurotropic virus strains (RABV, CDV). A sub-population of early-activated CD69+CD3+ T lymphocytes highly expressing CRMP2 (CRMP2hi) peaked in the blood, lymph nodes and brain of mice infected with neurotropic viruses, and correlated with severity of disease. They displayed high migratory properties reduced by CRMP2 blocking antibody. These data point out the potential use of CRMP2 as a peripheral indicator of neuroinflammation.
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Abstract
Despite increases in our understanding of rabies pathogenesis, it remains an inevitably fatal disease. Lack of awareness, low level of political commitment to rabies control, and failure to recognize and correlate clinical, laboratory, and neuroimaging features contribute to continuing deaths. Clinical symptomatology, once believed to be unique, may be variable, even in patients associated with lyssaviruses of the same genotype. This article discusses virus transport, the role of virus and host response mechanisms in relation to protean clinical manifestations, and mechanisms responsible for relative intactness of consciousness in human rabies. Differential involvement of the anterior horn cell in furious rabies and the peripheral nerve in paralytic rabies is summarized. Escape mechanisms from host defenses explain why a fatal outcome is unavoidable regardless of therapy. Neuroprotective treatment, using a coma-induction regimen, proves not to be beneficial. Survival of patients with excellent recovery relies on early innate and adaptive immunity plus adequate intensive care support.
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Affiliation(s)
- Thiravat Hemachudha
- Neurology Division, Department of Medicine, Chulalongkorn University Hospital, Rama 4 Road, Bangkok 10330, Thailand.
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Moore SM, Wilkerson MJ, Davis RD, Wyatt CR, Briggs DJ. Detection of cellular immunity to rabies antigens in human vaccinees. J Clin Immunol 2006; 26:533-45. [PMID: 16964551 DOI: 10.1007/s10875-006-9044-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Accepted: 08/23/2006] [Indexed: 01/11/2023]
Abstract
A nonradioactive multi-parameter flow cytometry assay was developed to identify antigen-specific lymphocytes in human subjects previously vaccinated against rabies virus and was subsequently compared to the standard tritiated thymidine method. A cell tracking dye, carboxyfluorescein succinimidyl ester, was used in combination with surface label for CD4 and CD8 cells in order to determine the response of lymphocytes to killed rabies virus in an antigen recall assay. The rabies virus-specific lymphocyte response was compared to the humoral immune response in each of ten vaccinated and five non-vaccinated subjects. Lymphocyte responses to rabies virus were observed in all ten vaccinated subjects; some noted as early as 3 days after stimulation while others were not until 7 days after stimulation. There was good agreement between the proliferation index of the CFSE assay and the simulation index of the [3H]thymidine assay (kappa statistic=0.73). An inverse relationship was detected between the level of rabies virus neutralizing antibody (RVNA) and the lymphocyte response to inactivated rabies virus in the vaccinated subjects. The association between cytokines production and level of humoral and cellular response was investigated in four representative subjects. Two vaccinated subjects with high proliferation indices and low RVNA titers produced Th1 type cytokines to rabies virus stimulation, whereas two vaccinated individuals with low proliferation indices and high RVNA titers responses did not produce these cytokines.
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Affiliation(s)
- Susan M Moore
- Department of Diagnostic Medicine, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506, USA.
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Muhamuda K, Madhusudana SN, Ravi V, Desai A. Presence of rabies specific immune complexes in cerebro-spinal fluid can help in ante-mortem diagnosis of human paralytic rabies. J Clin Virol 2006; 37:162-7. [PMID: 16931137 DOI: 10.1016/j.jcv.2006.06.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2006] [Revised: 06/27/2006] [Accepted: 06/30/2006] [Indexed: 02/06/2023]
Abstract
BACKGROUND Human rabies presents in two clinical forms, viz. furious or encephalitic and paralytic. Clinical diagnosis of paralytic form is difficult and requires laboratory confirmation. Presently available diagnostic techniques are not very sensitive for ante-mortem confirmation of rabies. OBJECTIVE In the present study, we investigated whether presence of rabies specific immune complexes in cerebro-spinal fluid (CSF) of paralytic rabies patients could help in ante-mortem diagnosis of rabies. STUDY DESIGN A capture ELISA based on monoclonal antibodies to rabies nucleoprotein (N) and glycoprotein (G) was developed to detect immune complexes to rabies N and G proteins. We studied CSF samples collected ante-mortem from 30 suspected paralytic rabies patients in whom diagnosis was later confirmed by autopsy. We included 30 CSF samples from people undergoing spinal anesthesia as negative controls and 30 CSF samples from other viral encephalitis as disease controls. RESULTS Twenty-three out of 30 CSF samples (76.6%) showed presence of immune complexes to both rabies N and G proteins. None of the negative controls and CSFs from other confirmed viral infections were positive. Thus, the results were 100% specific and the sensitivity of this test was 76.6%. CONCLUSIONS Detection of immune complexes to rabies antigens may be used as one of the techniques for rapid ante-mortem diagnosis of human rabies.
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Affiliation(s)
- K Muhamuda
- Department of Neurovirology, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore 560029, India
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