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Kembou-Ringert JE, Hotio FN, Steinhagen D, Thompson KD, Surachetpong W, Rakus K, Daly JM, Goonawardane N, Adamek M. Knowns and unknowns of TiLV-associated neuronal disease. Virulence 2024; 15:2329568. [PMID: 38555518 PMCID: PMC10984141 DOI: 10.1080/21505594.2024.2329568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/07/2024] [Indexed: 04/02/2024] Open
Abstract
Tilapia Lake Virus (TiLV) is associated with pathological changes in the brain of infected fish, but the mechanisms driving the virus's neuropathogenesis remain poorly characterized. TiLV establishes a persistent infection in the brain of infected fish even when the virus is no longer detectable in the peripheral organs, rendering therapeutic interventions and disease management challenging. Moreover, the persistence of the virus in the brain may pose a risk for viral reinfection and spread and contribute to ongoing tissue damage and neuroinflammatory processes. In this review, we explore TiLV-associated neurological disease. We discuss the possible mechanism(s) used by TiLV to enter the central nervous system (CNS) and examine TiLV-induced neuroinflammation and brain immune responses. Lastly, we discuss future research questions and knowledge gaps to be addressed to significantly advance this field.
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Affiliation(s)
- Japhette E. Kembou-Ringert
- Department of infection, immunity and Inflammation, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Fortune N. Hotio
- Department of Animal Biology, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Dieter Steinhagen
- Fish Disease Research Unit, Institute for parasitology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Kim D. Thompson
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, UK
| | - Win Surachetpong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Krzysztof Rakus
- Department of Evolutionary Immunology, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Krakow, Poland
| | - Janet M. Daly
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK
| | - Niluka Goonawardane
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Mikolaj Adamek
- Fish Disease Research Unit, Institute for parasitology, University of Veterinary Medicine Hannover, Hannover, Germany
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2
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Dell’Aquila M, Cafiero C, Micera A, Stigliano E, Ottaiano MP, Benincasa G, Schiavone B, Guidobaldi L, Santacroce L, Pisconti S, Arena V, Palmirotta R. SARS-CoV-2-Related Olfactory Dysfunction: Autopsy Findings, Histopathology, and Evaluation of Viral RNA and ACE2 Expression in Olfactory Bulbs. Biomedicines 2024; 12:830. [PMID: 38672185 PMCID: PMC11048640 DOI: 10.3390/biomedicines12040830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 03/29/2024] [Accepted: 04/04/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND The COVID-19 pandemic has been a health emergency with a significant impact on the world due to its high infectiousness. The disease, primarily identified in the lower respiratory tract, develops with numerous clinical symptoms affecting multiple organs and displays a clinical finding of anosmia. Several authors have investigated the pathogenetic mechanisms of the olfactory disturbances caused by SARS-CoV-2 infection, proposing different hypotheses and showing contradictory results. Since uncertainties remain about possible virus neurotropism and direct damage to the olfactory bulb, we investigated the expression of SARS-CoV-2 as well as ACE2 receptor transcripts in autoptic lung and olfactory bulb tissues, with respect to the histopathological features. METHODS Twenty-five COVID-19 olfactory bulbs and lung tissues were randomly collected from 200 initial autopsies performed during the COVID-19 pandemic. Routine diagnosis was based on clinical and radiological findings and were confirmed with post-mortem swabs. Real-time RT-PCR for SARS-CoV-2 and ACE2 receptor RNA was carried out on autoptic FFPE lung and olfactory bulb tissues. Histological staining was performed on tissue specimens and compared with the molecular data. RESULTS While real-time RT-PCR for SARS-CoV-2 was positive in 23 out of 25 lung samples, the viral RNA expression was absent in olfactory bulbs. ACE2-receptor RNA was present in all tissues examined, being highly expressed in lung samples than olfactory bulbs. CONCLUSIONS Our finding suggests that COVID-19 anosmia is not only due to neurotropism and the direct action of SARS-CoV-2 entering the olfactory bulb. The mechanism of SARS-CoV-2 neuropathogenesis in the olfactory bulb requires a better elucidation and further research studies to mitigate the olfactory bulb damage associated with virus action.
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Affiliation(s)
- Marco Dell’Aquila
- Anatomic Pathology Unit, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (M.D.); (E.S.); (V.A.)
- Pathology Unit, Belcolle Hospital, ASL Viterbo, 01100 Viterbo, Italy
| | - Concetta Cafiero
- Medical Oncology, SG Moscati Hospital, 74010 Statte, Italy;
- Anatomic Pathology Unit, Fabrizio Spaziani Hospital, 03100 Frosinone, Italy
| | - Alessandra Micera
- Research and Development Laboratory for Biochemical, Molecular and Cellular Applications in Ophthalmological Science, IRCCS–Fondazione Bietti, 00184 Rome, Italy
| | - Egidio Stigliano
- Anatomic Pathology Unit, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (M.D.); (E.S.); (V.A.)
| | - Maria Pia Ottaiano
- Department of Clinical Pathology and Molecular Biology, Pineta Grande Hospital, 81030 Castel Volturno, Italy; (M.P.O.); (G.B.); (B.S.)
| | - Giulio Benincasa
- Department of Clinical Pathology and Molecular Biology, Pineta Grande Hospital, 81030 Castel Volturno, Italy; (M.P.O.); (G.B.); (B.S.)
| | - Beniamino Schiavone
- Department of Clinical Pathology and Molecular Biology, Pineta Grande Hospital, 81030 Castel Volturno, Italy; (M.P.O.); (G.B.); (B.S.)
| | - Leo Guidobaldi
- Cytodiagnostic Unit, Section of Pathology Sandro Pertini Hospital, ASL Rm2, 00157 Rome, Italy;
| | - Luigi Santacroce
- Section of Microbiology and Virology, Interdisciplinary Department of Medicine, School of Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy;
| | | | - Vincenzo Arena
- Anatomic Pathology Unit, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (M.D.); (E.S.); (V.A.)
| | - Raffaele Palmirotta
- Section of Sciences and Technologies of Laboratory Medicine, Interdisciplinary Department of Medicine, School of Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy;
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Rangel MV, Bourguet FA, Hall CI, Weilhammer DR. Evaluation of Inactivation Methods for Rift Valley Fever Virus in Mouse Microglia. Pathogens 2024; 13:159. [PMID: 38392897 PMCID: PMC10892077 DOI: 10.3390/pathogens13020159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/30/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Rift Valley fever phlebovirus (RVFV) is a highly pathogenic mosquito-borne virus with bioweapon potential due to its ability to be spread by aerosol transmission. Neurological symptoms are among the worst outcomes of infection, and understanding of pathogenesis mechanisms within the brain is limited. RVFV is classified as an overlap select agent by the CDC and USDA; therefore, experiments involving fully virulent strains of virus are tightly regulated. Here, we present two methods for inactivation of live virus within samples derived from mouse microglia cells using commercially available kits for the preparation of cells for flow cytometry and RNA extraction. Using the flow cytometry protocol, we demonstrate key differences in the response of primary murine microglia to infection with fully virulent versus attenuated RVFV.
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Affiliation(s)
- Margarita V. Rangel
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA; (M.V.R.); (F.A.B.)
| | - Feliza A. Bourguet
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA; (M.V.R.); (F.A.B.)
| | - Carolyn I. Hall
- Environment, Safety & Health, Biosafety & Biogovernance Functional Area, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;
| | - Dina R. Weilhammer
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA; (M.V.R.); (F.A.B.)
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4
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Wang Q, Jiang Y, Bao G, Yao W, Yang Q, Chen S, Wang G. Duck Tembusu virus induces incomplete autophagy via the ERK/mTOR and AMPK/mTOR signalling pathways to promote viral replication in neuronal cells. Vet Res 2023; 54:103. [PMID: 37936178 PMCID: PMC10631066 DOI: 10.1186/s13567-023-01235-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 09/13/2023] [Indexed: 11/09/2023] Open
Abstract
Duck Tembusu virus (DTMUV) is a neurotropic virus in the genus Flavivirus that causes massive economic losses to the poultry industry in China and neighbouring countries. Autophagy is pivotal in cellular responses to pathogens and in viral pathogenesis. However, little is known about the roles of autophagy in DTMUV replication and viral pathogenesis, especially in neuropathogenesis. In this study, mouse neuroblastoma cells (Neuro-2a) were used to establish a cell model of DTMUV infection. Our experiments indicated that DTMUV infection induced incomplete autophagy in Neuro-2a cells. Then, we used different autophagy regulators to alter the autophagy induced by DTMUV and found that incomplete autophagy promoted DTMUV replication. Furthermore, we showed that DTMUV infection activated the ERK and AMPK pathways, resulting in decreased phosphorylation of the autophagy repressor mTOR, subsequently leading to autophagic induction. In addition, we utilized ICR mice in an animal model of DTMUV infection to evaluate the autophagic responses in brain tissues and investigate the effects of autophagy on viral replication and tissue lesions. Our results confirmed that DTMUV induced incomplete autophagy in mouse brain tissues and that autophagy inducer treatment promoted DTMUV replication and aggravated DTMUV-induced lesions, whereas autophagy inhibitor treatment had the opposite effects. In summary, DTMUV infection induced incomplete autophagy through the ERK/mTOR and AMPK/mTOR signalling pathways to promote viral replication in mouse neuronal cells, and DTMUV-induced incomplete autophagy contributed to the neuropathogenesis of DTMUV.
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Affiliation(s)
- Qing Wang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yaqian Jiang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Guangbin Bao
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Weiping Yao
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Qing Yang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Shuyue Chen
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Guijun Wang
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.
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Lohitthai S, Rungruengkitkun A, Jitprasutwit N, Kong-Ngoen T, Duangurai T, Tandhavanant S, Sukphopetch P, Chantratita N, Indrawattana N, Pumirat P. Type VI Secretion System Accessory Protein TagAB-5 Promotes Burkholderia pseudomallei Pathogenicity in Human Microglia. Biomedicines 2023; 11:2927. [PMID: 38001928 PMCID: PMC10669256 DOI: 10.3390/biomedicines11112927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/26/2023] Open
Abstract
Central nervous system (CNS) melioidosis caused by Burkholderia pseudomallei is being increasingly reported. Because of the high mortality associated with CNS melioidosis, understanding the underlying mechanism of B. pseudomallei pathogenesis in the CNS needs to be intensively investigated to develop better therapeutic strategies against this deadly disease. The type VI secretion system (T6SS) is a multiprotein machine that uses a spring-like mechanism to inject effectors into target cells to benefit the infection process. In this study, the role of the T6SS accessory protein TagAB-5 in B. pseudomallei pathogenicity was examined using the human microglial cell line HCM3, a unique resident immune cell of the CNS acting as a primary mediator of inflammation. We constructed B. pseudomallei tagAB-5 mutant and complementary strains by the markerless allele replacement method. The effects of tagAB-5 deletion on the pathogenicity of B. pseudomallei were studied by bacterial infection assays of HCM3 cells. Compared with the wild type, the tagAB-5 mutant exhibited defective pathogenic abilities in intracellular replication, multinucleated giant cell formation, and induction of cell damage. Additionally, infection by the tagAB-5 mutant elicited a decreased production of interleukin 8 (IL-8) in HCM3, suggesting that efficient pathogenicity of B. pseudomallei is required for IL-8 production in microglia. However, no significant differences in virulence in the Galleria mellonella model were observed between the tagAB-5 mutant and the wild type. Taken together, this study indicated that microglia might be an important intracellular niche for B. pseudomallei, particularly in CNS infection, and TagAB-5 confers B. pseudomallei pathogenicity in these cells.
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Affiliation(s)
- Sanisa Lohitthai
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
| | - Amporn Rungruengkitkun
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
| | - Niramol Jitprasutwit
- Center for Vaccine Development, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom 73170, Thailand;
| | - Thida Kong-Ngoen
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
| | - Taksaon Duangurai
- Department of Companion Animal Clinical Sciences, Kasetsart University, Bangkok 10900, Thailand;
| | - Sarunporn Tandhavanant
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
- Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan
| | - Passanesh Sukphopetch
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
| | - Narisara Chantratita
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Nitaya Indrawattana
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
| | - Pornpan Pumirat
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (S.L.); (A.R.); (T.K.-N.); (S.T.); (P.S.); (N.C.); (N.I.)
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Rengifo AC, Rivera J, Álvarez-Díaz DA, Naizaque J, Santamaria G, Corchuelo S, Gómez CY, Torres-Fernández O. Morphological and Molecular Changes in the Cortex and Cerebellum of Immunocompetent Mice Infected with Zika Virus. Viruses 2023; 15:1632. [PMID: 37631975 PMCID: PMC10458311 DOI: 10.3390/v15081632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023] Open
Abstract
Zika virus (ZIKV) disease continues to be a threat to public health, and it is estimated that millions of people have been infected and that there have been more cases of serious complications than those already reported. Despite many studies on the pathogenesis of ZIKV, several of the genes involved in the malformations associated with viral infection are still unknown. In this work, the morphological and molecular changes in the cortex and cerebellum of mice infected with ZIKV were evaluated. Neonatal BALB/c mice were inoculated with ZIKV intraperitoneally, and the respective controls were inoculated with a solution devoid of the virus. At day 10 postinoculation, the mice were euthanized to measure the expression of the markers involved in cortical and cerebellar neurodevelopment. The infected mice presented morphological changes accompanied by calcifications, as well as a decrease in most of the markers evaluated in the cortex and cerebellum. The modifications found could be predictive of astrocytosis, dendritic pathology, alterations in the regulation systems of neuronal excitation and inhibition, and premature maturation, conditions previously described in other models of ZIKV infection and microcephaly.
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Affiliation(s)
- Aura Caterine Rengifo
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
| | - Jorge Rivera
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
| | - Diego Alejandro Álvarez-Díaz
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
- Genómica de Microorganismos Emergentes, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia
| | - Julián Naizaque
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
| | - Gerardo Santamaria
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
| | - Sheryll Corchuelo
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
| | - Claudia Yadira Gómez
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
| | - Orlando Torres-Fernández
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud (INS), Avenue 26 No. 51-20–Zone 6 CAN, Bogotá 111321, Colombia; (J.R.); (D.A.Á.-D.); (J.N.); (G.S.); (S.C.); (C.Y.G.); (O.T.-F.)
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Chandra PK, Braun SE, Maity S, Castorena-Gonzalez JA, Kim H, Shaffer JG, Cikic S, Rutkai I, Fan J, Guidry JJ, Worthylake DK, Li C, Abdel-Mageed AB, Busija DW. Circulating Plasma Exosomal Proteins of Either SHIV-Infected Rhesus Macaque or HIV-Infected Patient Indicates a Link to Neuropathogenesis. Viruses 2023; 15:794. [PMID: 36992502 PMCID: PMC10058833 DOI: 10.3390/v15030794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/31/2023] Open
Abstract
Despite the suppression of human immunodeficiency virus (HIV) replication by combined antiretroviral therapy (cART), 50-60% of HIV-infected patients suffer from HIV-associated neurocognitive disorders (HAND). Studies are uncovering the role of extracellular vesicles (EVs), especially exosomes, in the central nervous system (CNS) due to HIV infection. We investigated links among circulating plasma exosomal (crExo) proteins and neuropathogenesis in simian/human immunodeficiency virus (SHIV)-infected rhesus macaques (RM) and HIV-infected and cART treated patients (Patient-Exo). Isolated EVs from SHIV-infected (SHIV-Exo) and uninfected (CTL-Exo) RM were predominantly exosomes (particle size < 150 nm). Proteomic analysis quantified 5654 proteins, of which 236 proteins (~4%) were significantly, differentially expressed (DE) between SHIV-/CTL-Exo. Interestingly, different CNS cell specific markers were abundantly expressed in crExo. Proteins involved in latent viral reactivation, neuroinflammation, neuropathology-associated interactive as well as signaling molecules were expressed at significantly higher levels in SHIV-Exo than CTL-Exo. However, proteins involved in mitochondrial biogenesis, ATP production, autophagy, endocytosis, exocytosis, and cytoskeleton organization were significantly less expressed in SHIV-Exo than CTL-Exo. Interestingly, proteins involved in oxidative stress, mitochondrial biogenesis, ATP production, and autophagy were significantly downregulated in primary human brain microvascular endothelial cells exposed with HIV+/cART+ Patient-Exo. We showed that Patient-Exo significantly increased blood-brain barrier permeability, possibly due to loss of platelet endothelial cell adhesion molecule-1 protein and actin cytoskeleton structure. Our novel findings suggest that circulating exosomal proteins expressed CNS cell markers-possibly associated with viral reactivation and neuropathogenesis-that may elucidate the etiology of HAND.
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Affiliation(s)
- Partha K. Chandra
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Stephen E. Braun
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA
- Division of Immunology, Tulane National Primate Research Center, Covington, LA 70433, USA
| | - Sudipa Maity
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | | | - Hogyoung Kim
- Department of Urology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Jeffrey G. Shaffer
- Department of Biostatistics and Data Science, Tulane University, New Orleans, LA 70112, USA
| | - Sinisa Cikic
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Ibolya Rutkai
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Jia Fan
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Jessie J. Guidry
- Proteomics Core Facility, Louisiana State University, New Orleans, LA 70112, USA
| | - David K. Worthylake
- Proteomics Core Facility, Louisiana State University, New Orleans, LA 70112, USA
| | - Chenzhong Li
- Department of Biochemistry and Molecular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Asim B. Abdel-Mageed
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA
- Department of Urology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - David W. Busija
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA
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Bauer L, van Riel D. Do SARS-CoV-2 Variants Differ in Their Neuropathogenicity? mBio 2023; 14:e0292022. [PMID: 36651750 DOI: 10.1128/mbio.02920-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Neurological complications associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections are a huge societal problem. Although the neuropathogenicity of SARS-CoV-2 is not yet fully understood, there is evidence that SARS-CoV-2 can invade and infect cells of the central nervous system. Kong et al. (https://doi.org/10.1128/mbio.02308-22) shows that the mechanism of virus entry into astrocytes in brain organoids and primary astrocytes differs from entry into respiratory epithelial cells. However, how SARS-CoV-2 enters susceptible CNS cells and whether there are differences among SARS-CoV-2 variants is still unclear. In vivo and in vitro models are useful to study these important questions and may reveal important differences among SARS-CoV-2 variants in their neuroinvasive, neurotropic, and neurovirulent potential. In this commentary we address how this study contributes to the understanding of the neuropathology of SARS-CoV-2 and its variants.
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Jiang X, Liu S, Fu YR, Liu XJ, Li XJ, Yang B, Jiang HF, Shen ZZ, Alemu EA, Vazquez P, Tang Y, Kaarbø M, McVoy MA, Rayner S, Luo MH. Human cytomegalovirus infection perturbs neural progenitor cell fate via the expression of viral microRNAs. J Med Virol 2023; 95:e28574. [PMID: 36772841 DOI: 10.1002/jmv.28574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
Human cytomegalovirus (HCMV) preferentially targets neural progenitor cells (NPCs) in congenitally infected fetal brains, inducing neurodevelopmental disorders. While HCMV expresses several microRNAs (miRNAs) during infection, their roles in NPC infection are unclear. Here, we characterized expression of cellular and viral miRNAs in HCMV-infected NPCs during early infection by microarray and identified seven differentially expressed cellular miRNAs and six significantly upregulated HCMV miRNAs. Deep learning approaches were used to identify potential targets of significantly upregulated HCMV miRNAs against differentially expressed cellular messenger RNA (mRNAs), and the associations with miRNA-mRNA expression changes were observed. Gene ontology enrichment analysis indicated cellular gene targets were significantly enriched in pathways involved in neurodevelopment and cell-cycle processes. Viral modulation of selected miRNAs and cellular gene targets involved in neurodevelopmental processes were further validated by real-time quantitative reverse transcription polymerase chain reaction. Finally, a predicted 3' untranslated region target site of hcmv-miR-US25-1 in Jag1, a factor important for neurogenesis, was confirmed by mutagenesis. Reduction of Jag1 RNA and protein levels in NPCs was observed in response to transient expression of hcmv-miR-US25-1. A hcmv-miR-US25-1 mutant virus (ΔmiR-US25) displayed limited ability to downregulate Jag1 mRNA levels and protein levels during the early infection stage compared with the wild type virus. Our collective experimental and computational investigation of miRNAs and cellular mRNAs expression in HCMV-infected NPCs yields new insights into the roles of viral miRNAs in regulating NPC fate and their contributions to HCMV neuropathogenesis.
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Affiliation(s)
- Xuan Jiang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children Medical Center, Guangdong, China.,Department of Medical Genetics, Oslo University Hospital, University of Oslo, Oslo, Norway.,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Siqing Liu
- Department of Medical Genetics, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Ya-Ru Fu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.,University of Chinese Academy of Sciences, Beijing, China.,Institute of Surface Analysis and Chemical Biology, University of Jinan, Jinan, China
| | - Xi-Juan Liu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xiao-Jun Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Bo Yang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children Medical Center, Guangdong, China.,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Hai-Fei Jiang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Zhang-Zhou Shen
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.,Hubei Key Laboratory for Kidney Disease Pathogenesis and Intervention, Hubei Polytechnic University, Medical School, Huangshi, China
| | | | - Pavel Vazquez
- Department of Medical Genetics, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Yaping Tang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children Medical Center, Guangdong, China
| | - Mari Kaarbø
- Department of Microbiology, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Michael A McVoy
- Department of Pediatrics, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Simon Rayner
- Department of Medical Genetics, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Min-Hua Luo
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.,University of Chinese Academy of Sciences, Beijing, China
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10
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de Vries L, Harding AT. Mechanisms of Neuroinvasion and Neuropathogenesis by Pathologic Flaviviruses. Viruses 2023; 15. [PMID: 36851477 DOI: 10.3390/v15020261] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/07/2023] [Accepted: 01/14/2023] [Indexed: 01/19/2023] Open
Abstract
Flaviviruses are present on every continent and cause significant morbidity and mortality. In many instances, severe cases of infection with flaviviruses involve the invasion of and damage to the central nervous system (CNS). Currently, there are several mechanisms by which it has been hypothesized flaviviruses reach the brain, including the disruption of the blood-brain barrier (BBB) which acts as a first line of defense by blocking the entry of many pathogens into the brain, passing through the BBB without disruption, as well as travelling into the CNS through axonal transport from peripheral nerves. After flaviviruses have entered the CNS, they cause different neurological symptoms, leading to years of neurological sequelae or even death. Similar to neuroinvasion, there are several identified mechanisms of neuropathology, including direct cell lysis, blockage of the cell cycle, indication of apoptosis, as well as immune induced pathologies. In this review, we aim to summarize the current knowledge in the field of mechanisms of both neuroinvasion and neuropathogenesis during infection with a variety of flaviviruses and examine the potential contributions and timing of each discussed pathway.
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11
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Safiriyu AA, Mulchandani V, Anakkacheri MN, Pal D, Das Sarma J. Proline-Proline Dyad in the Fusion Peptide of the Murine β-Coronavirus Spike Protein's S2 Domain Modulates Its Neuroglial Tropism. Viruses 2023; 15:215. [PMID: 36680255 PMCID: PMC9865228 DOI: 10.3390/v15010215] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/04/2023] [Accepted: 01/10/2023] [Indexed: 01/14/2023] Open
Abstract
The β-Coronavirus mouse hepatitis virus (MHV-A59)-RSA59 has a patent stretch of fusion peptide (FP) containing two consecutive central prolines (PP) in the S2 domain of the Spike protein. Our previous studies compared the PP-containing fusogenic-demyelinating strain RSA59(PP) to its one proline-deleted mutant strain RSA59(P) and one proline-containing non-fusogenic non-demyelinating parental strain RSMHV2(P) to its one proline inserted mutant strain RSMHV2(PP). These studies highlighted the crucial role of PP in fusogenicity, hepato-neuropathogenesis, and demyelination. Computational studies combined with biophysical data indicate that PP at the center of the FP provides local rigidity while imparting global fluctuation to the Spike protein that enhances the fusogenic properties of RSA59(PP) and RSMHV2(PP). To elaborate on the understanding of the role of PP in the FP of MHV, the differential neuroglial tropism of the PP and P mutant strains was investigated. Comparative studies demonstrated that PP significantly enhances the viral tropism for neurons, microglia, and oligodendrocytes. PP, however, is not essential for viral tropism for either astroglial or oligodendroglial precursors or the infection of meningeal fibroblasts in the blood-brain and blood-CSF barriers. PP in the fusion domain is critical for promoting gliopathy, making it a potential region for designing antivirals for neuro-COVID therapy.
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Affiliation(s)
- Abass Alao Safiriyu
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Vaishali Mulchandani
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Mohammed Nahaf Anakkacheri
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Debnath Pal
- Department of Computational and Data Sciences, Indian Institute of Science, Bengaluru 560012, India
| | - Jayasri Das Sarma
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
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12
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Suzuki K, Zaunders J, Gates TM, Levert A, Butterly S, Liu Z, Ishida T, Palmer S, Rae CD, Jugé L, Cysique LA, Brew BJ. Elevation of cell-associated HIV-1 transcripts in CSF CD4+ T cells, despite effective antiretroviral therapy, is linked to brain injury. Proc Natl Acad Sci U S A 2022; 119:e2210584119. [PMID: 36413502 DOI: 10.1073/pnas.2210584119] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Antiretroviral therapy (ART) can attain prolonged undetectable HIV-1 in plasma and cerebrospinal fluid (CSF), but brain injury remains prevalent in people living with HIV-1 infection (PLHIV). We investigated cell-associated (CA)-HIV-1 RNA transcripts in cells in CSF and blood, using the highly sensitive Double-R assay, together with proton Magnetic Resonance Spectroscopy (1H MRS) of major brain metabolites, in sixteen PLHIV. 14/16 CSF cell samples had quantifiable CA-HIV-1 RNA, at levels significantly higher than in their PBMCs (median 9,266 vs 185 copies /106 CD4+ T-cells; p<0.0001). In individual PLHIV, higher levels of HIV-1 transcripts in CSF cells were associated with greater brain injury in the frontal white matter (Std β=-0.73; p=0.007) and posterior cingulate (Std β=-0.61; p=0.03). 18-colour flow cytometry revealed that the CSF cells were 91% memory T-cells, equally CD4+ and CD8+ T-cells, but fewer B cells (0.4 %), and monocytes (3.1%). CXCR3+CD49d+integrin β7-, CCR5+CD4+ T-cells were highly enriched in CSF, compared with PBMC (p <0.001). However, CA-HIV-1 RNA could not be detected in 10/16 preparations of highly purified monocytes from PBMC, and was extremely low in the other six. Our data show that elevated HIV-1 transcripts in CSF cells were associated with brain injury, despite suppressive ART. The cellular source is most likely memory CD4+ T cells from blood, rather than trafficking monocytes. Future research should focus on inhibitors of this transcription to reduce local production of potentially neurotoxic and inflammatory viral products.
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13
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Murphy AJ, Kelschenbach J, He H, Chao W, Kim BH, Volsky DJ, Berman JW. Buprenorphine reverses neurocognitive impairment in EcoHIV infected mice: A potential therapy for HIV-NCI. Front Immunol 2022; 13:1004985. [PMID: 36275760 PMCID: PMC9585248 DOI: 10.3389/fimmu.2022.1004985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 09/23/2022] [Indexed: 11/18/2022] Open
Abstract
Thirty-eight million people worldwide are living with HIV, PWH, a major public health problem. Antiretroviral therapy (ART) revolutionized HIV treatment and significantly increased the lifespan of PWH. However, approximately 15-50% of PWH develop HIV associated neurocognitive disorders (HIV-NCI), a spectrum of cognitive deficits, that negatively impact quality of life. Many PWH also have opioid use disorder (OUD), and studies in animal models of HIV infection as well as in PWH suggest that OUD can contribute to HIV-NCI. The synthetic opioid agonist, buprenorphine, treats OUD but its effects on HIV-NCI are unclear. We reported that human mature inflammatory monocytes express the opioid receptors MOR and KOR, and that buprenorphine reduces important steps in monocyte transmigration. Monocytes also serve as HIV reservoirs despite effective ART, enter the brain, and contribute to HIV brain disease. Using EcoHIV infected mice, an established model of HIV infection and HIV-NCI, we previously showed that pretreatment of mice prior to EcoHIV infection reduces mouse monocyte entry into the brain and prevents NCI. Here we show that buprenorphine treatment of EcoHIV infected mice with already established chronic NCI completely reverses the disease. Disease reversal was associated with a significant reduction in brain inflammatory monocytes and reversal of dendritic injury in the cortex and hippocampus. These results suggest that HIV-NCI persistence may require a continuing influx of inflammatory monocytes into the brain. Thus, we recommend buprenorphine as a potential therapy for mitigation of HIV brain disease in PWH with or without OUD.
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Affiliation(s)
- Aniella J. Murphy
- Laboratory of Dr. Joan W. Berman, Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Jennifer Kelschenbach
- Laboratory or Dr. David J. Volsky, Department of Medicine, Icahn School of Medicine at Mount Sinai, Manhattan, NY, United States
| | - Hongxia He
- Laboratory or Dr. David J. Volsky, Department of Medicine, Icahn School of Medicine at Mount Sinai, Manhattan, NY, United States
| | - Wei Chao
- Laboratory or Dr. David J. Volsky, Department of Medicine, Icahn School of Medicine at Mount Sinai, Manhattan, NY, United States
| | - Boe-Hyun Kim
- Laboratory or Dr. David J. Volsky, Department of Medicine, Icahn School of Medicine at Mount Sinai, Manhattan, NY, United States
| | - David J. Volsky
- Laboratory or Dr. David J. Volsky, Department of Medicine, Icahn School of Medicine at Mount Sinai, Manhattan, NY, United States
| | - Joan W. Berman
- Laboratory of Dr. Joan W. Berman, Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, United States
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14
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Aravamudhan P, Guzman-Cardozo C, Urbanek K, Welsh OL, Konopka-Anstadt JL, Sutherland DM, Dermody TS. The Murine Neuronal Receptor NgR1 Is Dispensable for Reovirus Pathogenesis. J Virol 2022; 96:e0005522. [PMID: 35353001 PMCID: PMC9044964 DOI: 10.1128/jvi.00055-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/07/2022] [Indexed: 11/20/2022] Open
Abstract
Engagement of host receptors is essential for viruses to enter target cells and initiate infection. Expression patterns of receptors in turn dictate host range, tissue tropism, and disease pathogenesis during infection. Mammalian orthoreovirus (reovirus) displays serotype-dependent patterns of tropism in the murine central nervous system (CNS) that are dictated by the viral attachment protein σ1. However, the receptor that mediates reovirus CNS tropism is unknown. Two proteinaceous receptors have been identified for reovirus, junctional adhesion molecule A (JAM-A) and Nogo-66 receptor 1 (NgR1). Engagement of JAM-A is required for reovirus hematogenous dissemination but is dispensable for neural spread and infection of the CNS. To determine whether NgR1 functions in reovirus neuropathogenesis, we compared virus replication and disease in wild-type (WT) and NgR1-/- mice. Genetic ablation of NgR1 did not alter reovirus replication in the intestine or transmission to the brain following peroral inoculation. Viral titers in neural tissues following intramuscular inoculation, which provides access to neural dissemination routes, also were comparable in WT and NgR1-/- mice, suggesting that NgR1 is dispensable for reovirus neural spread to the CNS. The absence of NgR1 also did not alter reovirus replication, neural tropism, and virulence following direct intracranial inoculation. In agreement with these findings, we found that the human but not the murine homolog of NgR1 functions as a receptor and confers efficient reovirus binding and infection of nonsusceptible cells in vitro. Thus, neither JAM-A nor NgR1 is required for reovirus CNS tropism in mice, suggesting that other unidentified receptors support this function. IMPORTANCE Viruses engage diverse molecules on host cell surfaces to navigate barriers, gain cell entry, and establish infection. Despite discovery of several reovirus receptors, host factors responsible for reovirus neurotropism are unknown. Human NgR1 functions as a reovirus receptor in vitro and is expressed in CNS neurons in a pattern overlapping reovirus tropism. We used mice lacking NgR1 to test whether NgR1 functions as a reovirus neural receptor. Following different routes of inoculation, we found that murine NgR1 is dispensable for reovirus dissemination to the CNS, tropism and replication in the brain, and resultant disease. Concordantly, expression of human but not murine NgR1 confers reovirus binding and infection of nonsusceptible cells in vitro. These results highlight species-specific use of alternate receptors by reovirus. A detailed understanding of species- and tissue-specific factors that dictate viral tropism will inform development of antiviral interventions and targeted gene delivery and therapeutic viral vectors.
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Affiliation(s)
- Pavithra Aravamudhan
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Camila Guzman-Cardozo
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Kelly Urbanek
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Olivia L. Welsh
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | | | - Danica M. Sutherland
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Terence S. Dermody
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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15
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Safiriyu AA, Singh M, Kishore A, Mulchandani V, Maity D, Behera A, Sinha B, Pal D, Das Sarma J. Two Consecutive Prolines in the Fusion Peptide of Murine β-Coronavirus Spike Protein Predominantly Determine Fusogenicity and May Be Essential but Not Sufficient to Cause Demyelination. Viruses 2022; 14:v14040834. [PMID: 35458565 PMCID: PMC9031231 DOI: 10.3390/v14040834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/13/2022] [Accepted: 04/14/2022] [Indexed: 11/16/2022] Open
Abstract
Combined in silico, in vitro, and in vivo comparative studies between isogenic-recombinant Mouse-Hepatitis-Virus-RSA59 and its proline deletion mutant, revealed a remarkable contribution of centrally located two consecutive prolines (PP) from Spike protein fusion peptide (FP) in enhancing virus fusogenic and hepato-neuropathogenic potential. To deepen our understanding of the underlying factors, we extend our studies to a non-fusogenic parental virus strain RSMHV2 (P) with a single proline in the FP and its proline inserted mutant, RSMHV2 (PP). Comparative in vitro and in vivo studies between virus strains RSA59(PP), RSMHV2 (P), and RSMHV2 (PP) in the FP demonstrate that the insertion of one proline significantly resulted in enhancing the virus fusogenicity, spread, and consecutive neuropathogenesis. Computational studies suggest that the central PP in Spike FP induces a locally ordered, compact, and rigid structure of the Spike protein in RSMHV2 (PP) compared to RSMHV2 (P), but globally the Spike S2-domain is akin to the parental strain RSA59(PP), the latter being the most flexible showing two potential wells in the energy landscape as observed from the molecular dynamics studies. The critical location of two central prolines of the FP is essential for fusogenicity and pathogenesis making it a potential site for designing antiviral.
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Affiliation(s)
- Abass Alao Safiriyu
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
| | - Manmeet Singh
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
| | - Abhinoy Kishore
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
| | - Vaishali Mulchandani
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
| | - Dibyajyoti Maity
- Department of Computational and Data Sciences, Indian Institute of Science, Bengaluru 560012, India; (D.M.); (D.P.)
| | - Amrutamaya Behera
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
| | - Bidisha Sinha
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
| | - Debnath Pal
- Department of Computational and Data Sciences, Indian Institute of Science, Bengaluru 560012, India; (D.M.); (D.P.)
| | - Jayasri Das Sarma
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India; (A.A.S.); (M.S.); (A.K.); (V.M.); (A.B.); (B.S.)
- Correspondence:
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16
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Gumbs SBH, Berdenis van Berlekom A, Kübler R, Schipper PJ, Gharu L, Boks MP, Ormel PR, Wensing AMJ, de Witte LD, Nijhuis M. Characterization of HIV-1 Infection in Microglia-Containing Human Cerebral Organoids. Viruses 2022; 14:v14040829. [PMID: 35458559 PMCID: PMC9032670 DOI: 10.3390/v14040829] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/07/2022] [Accepted: 04/14/2022] [Indexed: 12/21/2022] Open
Abstract
The achievement of an HIV cure is dependent on the eradication or permanent silencing of HIV-latent viral reservoirs, including the understudied central nervous system (CNS) reservoir. This requires a deep understanding of the molecular mechanisms of HIV’s entry into the CNS, latency establishment, persistence, and reversal. Therefore, representative CNS culture models that reflect the intercellular dynamics and pathophysiology of the human brain are urgently needed in order to study the CNS viral reservoir and HIV-induced neuropathogenesis. In this study, we characterized a human cerebral organoid model in which microglia grow intrinsically as a CNS culture model to study HIV infection in the CNS. We demonstrated that both cerebral organoids and isolated organoid-derived microglia (oMG), infected with replication-competent HIVbal reporter viruses, support productive HIV infection via the CCR5 co-receptor. Productive HIV infection was only observed in microglial cells. Fluorescence analysis revealed microglia as the only HIV target cell. Susceptibility to HIV infection was dependent on the co-expression of microglia-specific markers and the CD4 and CCR5 HIV receptors. Altogether, this model will be a valuable tool within the HIV research community to study HIV–CNS interactions, the underlying mechanisms of HIV-associated neurological disorders (HAND), and the efficacy of new therapeutic and curative strategies on the CNS viral reservoir.
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Affiliation(s)
- Stephanie B. H. Gumbs
- Translational Virology, Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (S.B.H.G.); (R.K.); (P.J.S.); (L.G.); (A.M.J.W.)
| | - Amber Berdenis van Berlekom
- Department of Psychiatry, University Medical Center Utrect Brain Center, Utrecht University, 3584 CG Utrecht, The Netherlands; (A.B.v.B.); (M.P.B.); (P.R.O.); (L.D.d.W.)
- Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Raphael Kübler
- Translational Virology, Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (S.B.H.G.); (R.K.); (P.J.S.); (L.G.); (A.M.J.W.)
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Pauline J. Schipper
- Translational Virology, Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (S.B.H.G.); (R.K.); (P.J.S.); (L.G.); (A.M.J.W.)
| | - Lavina Gharu
- Translational Virology, Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (S.B.H.G.); (R.K.); (P.J.S.); (L.G.); (A.M.J.W.)
| | - Marco P. Boks
- Department of Psychiatry, University Medical Center Utrect Brain Center, Utrecht University, 3584 CG Utrecht, The Netherlands; (A.B.v.B.); (M.P.B.); (P.R.O.); (L.D.d.W.)
| | - Paul R. Ormel
- Department of Psychiatry, University Medical Center Utrect Brain Center, Utrecht University, 3584 CG Utrecht, The Netherlands; (A.B.v.B.); (M.P.B.); (P.R.O.); (L.D.d.W.)
| | - Annemarie M. J. Wensing
- Translational Virology, Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (S.B.H.G.); (R.K.); (P.J.S.); (L.G.); (A.M.J.W.)
| | - Lot D. de Witte
- Department of Psychiatry, University Medical Center Utrect Brain Center, Utrecht University, 3584 CG Utrecht, The Netherlands; (A.B.v.B.); (M.P.B.); (P.R.O.); (L.D.d.W.)
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Monique Nijhuis
- Translational Virology, Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (S.B.H.G.); (R.K.); (P.J.S.); (L.G.); (A.M.J.W.)
- Correspondence:
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17
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Gaskill PJ, Fields JA, Langford DT, Stauch KL, Williams DW. Editorial: Advances in Understanding NeuroHIV Associated Changes in Neuroimmune Communication in the Combined Anti-retroviral Therapy (cART) Era. Front Neurol 2021; 12:763448. [PMID: 34675877 PMCID: PMC8523985 DOI: 10.3389/fneur.2021.763448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 09/08/2021] [Indexed: 12/04/2022] Open
Affiliation(s)
- Peter J Gaskill
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Jerel Adam Fields
- Department of Psychiatry, University of California San Diego, La Jolla, CA, United States
| | - Dianne T Langford
- Department of Neuroscience, Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Kelly L Stauch
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, United States
| | - Dionna W Williams
- Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, MD, United States
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18
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King EL, Irigoyen N. Zika Virus and Neuropathogenesis: The Unanswered Question of Which Strain Is More Prone to Causing Microcephaly and Other Neurological Defects. Front Cell Neurosci 2021; 15:695106. [PMID: 34658789 PMCID: PMC8514627 DOI: 10.3389/fncel.2021.695106] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 08/25/2021] [Indexed: 12/14/2022] Open
Abstract
Despite being perceived to be a relatively innocuous pathogen during its circulation in Africa in the 20th century, consequent outbreaks in French Polynesia and Latin America revealed the Zika virus (ZIKV) to be capable of causing severe neurological defects. Foetuses infected with the virus during pregnancy developed a range of pathologies including microcephaly, cerebral calcifications and macular scarring. These are now collectively known as Congenital Zika syndrome (CZS). It has been established that the neuropathogenesis of ZIKV results from infection of neural progenitor cells in the developing cerebral cortex. Following this, two main hypotheses have emerged: the virus causes either apoptosis or premature differentiation of neural progenitor cells, reducing the final number of mature neurons in the cerebral cortex. This review describes the cellular processes which could potentially cause virus induced apoptosis or premature differentiation, leading to speculation that a combination of the two may be responsible for the pathologies associated with ZIKV. The review also discusses which specific lineages of the ZIKV can employ these mechanisms. It has been unclear in the past whether the virus evolved its neurotropic capability following circulation in Africa, or if the virus has always caused microcephaly but public health surveillance in Africa had failed to detect it. Understanding the true neuropathogenesis of ZIKV is key to being prepared for further outbreaks in the future, and it will also provide insight into how neurotropic viruses can cause profound and life-long neurological defects.
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Affiliation(s)
- Emily Louise King
- Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Nerea Irigoyen
- Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
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19
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Dinh-Hung N, Sangpo P, Kruangkum T, Kayansamruaj P, Rung-Ruangkijkrai T, Senapin S, Rodkhum C, Dong HT. Dissecting the localization of Tilapia tilapinevirus in the brain of the experimentally infected Nile tilapia, Oreochromis niloticus (L.). J Fish Dis 2021; 44:1053-1064. [PMID: 33724491 DOI: 10.1111/jfd.13367] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 05/08/2023]
Abstract
Tilapia tilapinevirus or tilapia lake virus (TiLV) is an emerging virus that inflicts significant mortality on farmed tilapia globally. Previous studies reported detection of the virus in multiple organs of the infected fish; however, little is known about the in-depth localization of the virus in the central nervous system. Herein, we determined the distribution of TiLV in the entire brain of experimentally infected Nile tilapia. In situ hybridization (ISH) using TiLV-specific probes revealed that the virus was broadly distributed throughout the brain. The strongest positive signals were dominantly detected in the forebrain (responsible for learning, appetitive behaviour and attention) and the hindbrain (involved in controlling locomotion and basal physiology). The permissive cell zones for viral infection were observed mostly to be along the blood vessels and the ventricles. This indicates that the virus may productively enter into the brain through the circulatory system and widen broad regions, possibly through the cerebrospinal fluid along the ventricles, and subsequently induce the brain dysfunction. Understanding the pattern of viral localization in the brain may help elucidate the neurological disorders of the diseased fish. This study revealed the distribution of TiLV in the whole infected brain, providing new insights into fish-virus interactions and neuropathogenesis.
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Affiliation(s)
- Nguyen Dinh-Hung
- Fish Infectious Diseases Research Unit (FID RU), Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- The International Graduate Course of Veterinary Science and Technology (VST), Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Pattiya Sangpo
- Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Thanapong Kruangkum
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Pattanapon Kayansamruaj
- Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand
| | - Tilladit Rung-Ruangkijkrai
- Department of Veterinary Anatomy, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Saengchan Senapin
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Channarong Rodkhum
- Fish Infectious Diseases Research Unit (FID RU), Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- The International Graduate Course of Veterinary Science and Technology (VST), Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Ha Thanh Dong
- Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand
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20
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Abstract
Trypanosoma brucei is one of the protozoa parasites that can enter the brain and cause injury associated with toxic effects of parasite-derived molecules or with immune responses against infection. Other protozoa parasites with brain tropism include Toxoplasma, Plasmodium, Amoeba, and, eventually, other Trypanosomatids such as T. cruzi and Leishmania. Together, these parasites affect billions of people worldwide and are responsible for more than 500.000 deaths annually. Factors determining brain tropism, mechanisms of invasion as well as processes ongoing inside the brain are not well understood. But, they depend on the parasite involved. The pathogenesis caused by T. brucei initiates locally in the area of parasite inoculation, soon trypanosomes rich the blood, and the disease enters in the so-called early stage. The pathomechanisms in this phase have been described, even molecules used to combat the disease are effective during this period. Later, the disease evolves towards a late-stage, characterized by the presence of parasites in the central nervous system (CNS), the so-called meningo-encephalitic stage. This phase of the disease has not been sufficiently examined and remains a matter of investigation. Here, I stress the importance of delve into the study of the neuropathogenesis caused by T. brucei, which will enable the identification of pathways that may be targeted to overcome parasites that reached the CNS. Finally, I highlight the impact that the application of tools developed in the last years in the field of neuroscience will have on the study of neglected tropical diseases.
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Affiliation(s)
- Katherine Figarella
- Department of Neurophysiology, Institute of Physiology, University of Tübingen, Germany
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21
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Tee HK, Zainol MI, Sam IC, Chan YF. Recent advances in the understanding of enterovirus A71 infection: a focus on neuropathogenesis. Expert Rev Anti Infect Ther 2021; 19:733-747. [PMID: 33183118 DOI: 10.1080/14787210.2021.1851194] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Introduction: Hand, foot, and mouth disease caused by enterovirus A71 (EV-A71) is more frequently associated with neurological complications and deaths compared to other enteroviruses.Areas covered: The authors discuss current understanding of the neuropathogenesis of EV-A71 based on various clinical, human, and animal model studies. The authors discuss the important advancements in virus entry, virus dissemination, and neuroinvasion. The authors highlight the role of host immune system, host genetic factors, viral quasispecies, and heparan sulfate in EV-A71 neuropathogenesis.Expert opinion: Comparison of EV-A71 with EV-D68 and PV shows similarity in primary target sites and dissemination to the central nervous system. More research is needed to understand cellular tropisms, persistence of EV-A71, and other possible invasion routes. EV-A71 infection has varied clinical manifestations which may be attributed to multiple receptors usage. Future development of antivirals and vaccines should target neurotropic enteroviruses. Repurposing drug and immunomodulators used in combination could reduce the severity of EV-A71 infection. Only a few drugs have been tested in clinical trials, and in the absence of antiviral and vaccines (except China), active virus surveillance, good hand hygiene, and physical distancing should be advocated. A better understanding of EV-A71 neuropathogenesis is critical for antiviral and multivalent vaccines development.
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Affiliation(s)
- Han Kang Tee
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Izwan Zainol
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - I-Ching Sam
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Yoke Fun Chan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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22
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Peters CE, Carette JE. Return of the Neurotropic Enteroviruses: Co-Opting Cellular Pathways for Infection. Viruses 2021; 13:v13020166. [PMID: 33499355 PMCID: PMC7911124 DOI: 10.3390/v13020166] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/14/2021] [Accepted: 01/19/2021] [Indexed: 02/06/2023] Open
Abstract
Enteroviruses are among the most common human infectious agents. While infections are often mild, the severe neuropathogenesis associated with recent outbreaks of emerging non-polio enteroviruses, such as EV-A71 and EV-D68, highlights their continuing threat to public health. In recent years, our understanding of how non-polio enteroviruses co-opt cellular pathways has greatly increased, revealing intricate host-virus relationships. In this review, we focus on newly identified mechanisms by which enteroviruses hijack the cellular machinery to promote their replication and spread, and address their potential for the development of host-directed therapeutics. Specifically, we discuss newly identified cellular receptors and their contribution to neurotropism and spread, host factors required for viral entry and replication, and recent insights into lipid acquisition and replication organelle biogenesis. The comprehensive knowledge of common cellular pathways required by enteroviruses could expose vulnerabilities amenable for host-directed therapeutics against a broad spectrum of enteroviruses. Since this will likely include newly arising strains, it will better prepare us for future epidemics. Moreover, identifying host proteins specific to neurovirulent strains may allow us to better understand factors contributing to the neurotropism of these viruses.
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23
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Puccioni-Sohler M, Poton AR, Franklin M, da Silva SJ, Brindeiro R, Tanuri A. Current evidence of neurological features, diagnosis, and neuropathogenesis associated with COVID-19. Rev Soc Bras Med Trop 2020; 53:e20200477. [PMID: 33027418 PMCID: PMC7534972 DOI: 10.1590/0037-8682-0477-2020] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 07/31/2020] [Indexed: 01/08/2023] Open
Abstract
Recent reports indicate that besides respiratory and systemic symptoms among coronavirus disease (COVID-19) patients, the disease has a wide spectrum of neurological manifestations (encephalitis, meningitis, myelitis, acute disseminated encephalomyelitis, metabolic and acute hemorrhagic necrotizing encephalopathy, cerebrovascular diseases, Guillain-Barré syndrome, polyneuritis cranialis, dysautonomia, and myopathies). The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can spread from the respiratory system to the central nervous system, using transneuronal and hematogenous mechanisms. Although not every COVID-19 patient will test positive for the virus in the cerebrospinal fluid exam, the appearance of neurological symptoms associated with SARS-CoV-2 infection reveals the importance of understanding the neurologic manifestations and capacity for neural invasion associated with the pathogen. These aspects are relevant for correct diagnosis and treatment, and for the potential development of vaccines. This review highlights the latest evidence of SARS-CoV-2 infection with a focus on neurological involvement and potential neuropathogenesis mechanisms.
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Affiliation(s)
- Marzia Puccioni-Sohler
- Universidade Federal do Estado do Rio de Janeiro, Escola de Medicina e Cirurgia, Rio de Janeiro, RJ, Brasil
- Universidade Federal do Rio de Janeiro, Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Rio de Janeiro, RJ, Brasil
| | - André Rodrigues Poton
- Universidade Federal do Estado do Rio de Janeiro, Escola de Medicina e Cirurgia, Rio de Janeiro, RJ, Brasil
| | - Milena Franklin
- Universidade Federal do Estado do Rio de Janeiro, Escola de Medicina e Cirurgia, Rio de Janeiro, RJ, Brasil
| | - Samya Jezine da Silva
- Universidade Federal do Rio de Janeiro, Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Rio de Janeiro, RJ, Brasil
| | - Rodrigo Brindeiro
- Universidade Federal do Rio de Janeiro, Instituto de Biologia, Rio de Janeiro, RJ, Brasil
| | - Amilcar Tanuri
- Universidade Federal do Rio de Janeiro, Instituto de Biologia, Rio de Janeiro, RJ, Brasil
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24
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Abstract
The coronavirus disease-19 (COVID-19) pandemic has emerged as one of the major outbreaks to be mentioned in history in coming times. Like severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS), severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is a respiratory virus infecting the lungs with fever, dry cough, and acute pneumonia being the major symptoms. It infects epithelial cells expressing angiotensin converting enzyme 2 (ACE2) receptor, which is crucial for viral entry. Based on evolving clinical evidence, it is now unfitting to label SARS-CoV-2 as just a respiratory virus, as lately there are various reports that substantiate its pathogenicity in other organs of the body, including brain. In this review, we discuss the epidemiology of SARS-CoV-2 in comparison to SARS and MERS along with possibilities of viral entry into central nervous system (CNS) tissues. The review provides detailed information about the virulence, epidemiology, and insights into molecular pathways involved in the infectivity of the SARS-CoV-2 virus, along with an in-depth view of current concepts about the neurological significance of the SARS-CoV-2 virus and its neuropathological competence. The review also touches upon our current understanding of placental transmission of SARS-CoV-2, an important aspect of vertical transmission. Furthermore, the review provides a current update on strategies that have been used, are being used, or are under trial for treating the disease.
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Affiliation(s)
| | - Paritosh Jaiswal
- Cellular and Molecular Neuroscience, National Brain Research Centre, Manesar, Gurgaon, Haryana 122052, India
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25
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Salomão N, Rabelo K, Basílio-de-Oliveira C, Basílio-de-Oliveira R, Geraldo L, Lima F, dos Santos F, Nuovo G, Oliveira ERA, Paes M. Fatal Dengue Cases Reveal Brain Injury and Viral Replication in Brain-Resident Cells Associated with the Local Production of Pro-Inflammatory Mediators. Viruses 2020; 12:E603. [PMID: 32486462 PMCID: PMC7354550 DOI: 10.3390/v12060603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/06/2020] [Accepted: 04/16/2020] [Indexed: 12/14/2022] Open
Abstract
Dengue is an arboviral disease caused by dengue virus (DENV), which is transmitted to humans by Aedes aegypti mosquitoes. Infection by DENV most commonly results in a mild flu-like illness; however, the disease has been increasingly associated with neurological symptomatology. This association draws attention to further investigations on the impact of DENV infection in the host's central nervous system. Here, we analyzed brain samples of three fatal dengue cases that occurred in 2002 during an outbreak in Rio de Janeiro, Brazil. Brain tissues of these cases were marked by histopathological alterations, such as degenerated neurons, demyelination, hemorrhage, edema, and increased numbers of astrocytes and microglial cells. Samples were also characterized by lymphocytic infiltrates mainly composed of CD8 T cells. DENV replication was evidenced in neurons, microglia and endothelial cells through immunohistochemistry and in situ hybridization techniques. Pro-inflammatory cytokines, such as TNF-α and IFN-γ were detected in microglia, while endothelial cells were marked by the expression of RANTES/CCL5. Cytoplasmic HMGB1 and the production of nitric oxide were also found in neurons and microglial cells. This work highlights the possible participation of several local pro-inflammatory mediators in the establishment of dengue neuropathogenesis.
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Affiliation(s)
- Natália Salomão
- Interdisciplinary Medical Research Laboratory Rio de Janeiro, Oswaldo Cruz Foundation, 21040-900 Rio de Janeiro, Brazil;
| | - Kíssila Rabelo
- Ultrastructure and Tissue Biology Laboratory Rio de Janeiro, Rio de Janeiro State University, 20551-030 Rio de Janeiro, Brazil;
| | - Carlos Basílio-de-Oliveira
- Pathological Anatomy, Gaffrée Guinle University Hospital Rio de Janeiro, Federal University of the State of Rio de Janeiro, 20270-004 Rio de Janeiro, Brazil; (C.B.-d.-O.); (R.B.-d.-O.)
| | - Rodrigo Basílio-de-Oliveira
- Pathological Anatomy, Gaffrée Guinle University Hospital Rio de Janeiro, Federal University of the State of Rio de Janeiro, 20270-004 Rio de Janeiro, Brazil; (C.B.-d.-O.); (R.B.-d.-O.)
| | - Luiz Geraldo
- Glial Cell Biology Laboratory, Institute of Biomedical Sciences Rio de Janeiro, Federal University of Rio de Janeiro, 21941-590 Rio de Janeiro, Brazil; (L.G.); (F.L.)
| | - Flávia Lima
- Glial Cell Biology Laboratory, Institute of Biomedical Sciences Rio de Janeiro, Federal University of Rio de Janeiro, 21941-590 Rio de Janeiro, Brazil; (L.G.); (F.L.)
| | - Flávia dos Santos
- Viral Immunology Laboratory, Oswaldo Cruz Institute Rio de Janeiro, Oswaldo Cruz Foundation, 21040-900 Rio de Janeiro, Brazil;
| | - Gerard Nuovo
- Ohio State University Comprehensive Cancer Center, Ohio State University Foundation, Columbus, OH 43210, USA;
- Phylogeny Medical Laboratory Columbus, Ohio State University Foundation, Columbus, OH 43214, USA
| | - Edson R. A. Oliveira
- Department of Microbiology and Immunology Chicago, University of Illinois at Chicago, Chicago, IL 60612, USA;
| | - Marciano Paes
- Interdisciplinary Medical Research Laboratory Rio de Janeiro, Oswaldo Cruz Foundation, 21040-900 Rio de Janeiro, Brazil;
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26
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Burucúa MM, Pérez SE, Odeón AC, Cobo ER, Quintana S, Marin MS. Cathelicidin bovine myeloid antimicrobial peptide (BMAP) 28 is involved in the inflammatory response against alpha-herpesviruses in the bovine nervous system. Mol Immunol 2020; 122:148-155. [PMID: 32361417 DOI: 10.1016/j.molimm.2020.04.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/27/2020] [Accepted: 04/15/2020] [Indexed: 01/10/2023]
Abstract
The role of the local innate immune response in the neuropathogenesis of bovine herpesvirus (BoHV) type 1 and 5 remains largely unknown. This study determined the gene transcriptional expression of relevant bovine cathelicidins, TNFα and IFNβ in the nervous system of experimentally-infected cattle during the different stages of BoHV-1 and BoHV-5 infectious cycle. We studied the modulation of bovine myeloid antimicrobial peptide (BMAP) 27 and 28 by alpha-herpesviruses during acute infection of the central nervous system (CNS). However, BMAP28 was the main cathelicidin modulated. BoHV-5 supressed BMAP28 expression mainly in frontal cortex and cervical medulla whereas BoHV-1 slightly induced the expression of cathelicidins in the olfactory and posterior cortex. The differences in the regulation of the innate response are likely related to distinct replication rates of both alpha-herpesviruses in the CNS. During latency and reactivation, BoHV-1 and -5 decreased BMAP28 and BMAP27 expression, accompanied by high levels of TNFα and IFNβ transcripts in the posterior brain region and medulla during BoHV reactivation. In terms of cytokines, a remarkably overexpression of IFNβ was induced by BoHV-5 (133.8-fold). In trigeminal ganglion (TG) both alpha-herpesviruses induced cathelidicins gene expression at all stages of the infection cycle, while only acute BoHV-5 infection increased TNFα (129-fold) mRNA levels. This study suggests that the pronounced downregulation of BMAP28 in BoHV-5-acutely-infected CNS is due to a decreased immune stimulation during viral infection, favouring its establishment in the CNS with a low replication rate until latency. Thus, cathelicidins, together with IFNβ and TNFα, are differentially regulated by BoHV-5 and BoHV-1 infections and this regulation is dependent on the stage of virus infection in the bovine nervous system.
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Affiliation(s)
- M M Burucúa
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina; Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Balcarce, Ruta 226 Km 73.5 (7620), Balcarce, Buenos Aires, Argentina
| | - S E Pérez
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina; Facultad de Ciencias Veterinarias, CIVETAN, Universidad Nacional del Centro de la Provincia de Buenos Aires, Paraje Arroyo Seco S/N, Tandil 7000, Argentina
| | - A C Odeón
- Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta 226 Km 73.5 (7620), Balcarce, Buenos Aires, Argentina
| | - E R Cobo
- Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Canada
| | - S Quintana
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina; Centro de Investigación en Abejas Sociales, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, UNMDP, Funes, 3350, (7600) Mar del Plata, Buenos Aires, Argentina
| | - M S Marin
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina; Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Balcarce, Ruta 226 Km 73.5 (7620), Balcarce, Buenos Aires, Argentina.
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27
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Abstract
Pseudorabies virus (PRV) is an alphaherpesvirus related to varicella-zoster virus (VZV) and herpes simplex virus type 1 (HSV1). PRV is the causative agent of Aujeskzy’s disease in swine. PRV infects mucosal epithelium and the peripheral nervous system (PNS) of its host where it can establish a quiescent, latent infection. While the natural host of PRV is the swine, a broad spectrum of mammals, including rodents, cats, dogs, and cattle can be infected. Since the nineteenth century, PRV infection is known to cause a severe acute neuropathy, the so called “mad itch” in non-natural hosts, but surprisingly not in swine. In the past, most scientific efforts have been directed to eradicating PRV from pig farms by the use of effective marker vaccines, but little attention has been given to the processes leading to the mad itch. The main objective of this review is to provide state-of-the-art information on the mechanisms governing PRV-induced neuropathic itch in non-natural hosts. We highlight similarities and key differences in the pathogenesis of PRV infections between non-natural hosts and pigs that might explain their distinctive clinical outcomes. Current knowledge on the neurobiology and possible explanations for the unstoppable itch experienced by PRV-infected animals is also reviewed. We summarize recent findings concerning PRV-induced neuroinflammatory responses in mice and address the relevance of this animal model to study other alphaherpesvirus-induced neuropathies, such as those observed for VZV infection.
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28
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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29
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Abstract
The California serogroup of orthobunyaviruses comprises a group of mosquitoborne viruses, including La Crosse (LACV), snowshoe hare (SSHV), Tahyna (TAHV), Jamestown Canyon (JCV), and Inkoo (INKV) viruses, that cause neurologic disease in humans of differing ages with varying incidences. To determine how the pathogenesis of these viruses differs, we compared their ability to induce disease in mice and replicate and induce cell death in vitro. In mice, LACV, TAHV, and SSHV induced neurologic disease after intraperitoneal and intranasal inoculation, and JCV induced disease only after intranasal inoculation. INKV rarely induced disease, which correlated with less viral antigen in the brain than the other viruses. In vitro, all viruses replicated to high titers; however, LACV, SSHV, and TAHV induced high cell death, whereas JCV and INKV did not. Results demonstrated that CSG viruses differ in neuropathogenesis in vitro and in vivo, which correlates with the differences in pathogenesis reported in humans.
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MESH Headings
- Age Factors
- Animals
- Cells, Cultured
- Cluster Analysis
- Disease Models, Animal
- Encephalitis Virus, California/classification
- Encephalitis Virus, California/genetics
- Encephalitis Virus, California/pathogenicity
- Encephalitis, California/diagnosis
- Encephalitis, California/epidemiology
- Encephalitis, California/virology
- Genes, Viral
- Geography, Medical
- Global Health
- Humans
- Incidence
- Mice
- Public Health Surveillance
- Sequence Analysis, DNA
- Serogroup
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30
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Hixon AM, Frost J, Rudy MJ, Messacar K, Clarke P, Tyler KL. Understanding Enterovirus D68-Induced Neurologic Disease: A Basic Science Review. Viruses 2019; 11:E821. [PMID: 31487952 PMCID: PMC6783995 DOI: 10.3390/v11090821] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 12/28/2022] Open
Abstract
In 2014, the United States (US) experienced an unprecedented epidemic of enterovirus D68 (EV-D68)-induced respiratory disease that was temporally associated with the emergence of acute flaccid myelitis (AFM), a paralytic disease occurring predominantly in children, that has a striking resemblance to poliomyelitis. Although a definitive causal link between EV-D68 infection and AFM has not been unequivocally established, rapidly accumulating clinical, immunological, and epidemiological evidence points to EV-D68 as the major causative agent of recent seasonal childhood AFM outbreaks in the US. This review summarizes evidence, gained from in vivo and in vitro models of EV-D68-induced disease, which demonstrates that contemporary EV-D68 strains isolated during and since the 2014 outbreak differ from historical EV-D68 in several factors influencing neurovirulence, including their genomic sequence, their receptor utilization, their ability to infect neurons, and their neuropathogenicity in mice. These findings provide biological plausibility that EV-D68 is a causal agent of AFM and provide important experimental models for studies of pathogenesis and treatment that are likely to be difficult or impossible in humans.
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Affiliation(s)
- Alison M Hixon
- Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Joshua Frost
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Michael J Rudy
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Kevin Messacar
- Hospital Medicine and Pediatric Infectious Disease Sections, Department of Pediatrics, University of Colorado, Aurora, CO 80045, USA.
- Children's Hospital Colorado, Aurora, CO 80045, USA.
| | - Penny Clarke
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO 80045, USA.
| | - Kenneth L Tyler
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, USA
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO 80045, USA
- Division of Infectious Disease, Department of Medicine, University of Colorado School of Medicine, Aurora, CO 80045, USA
- Neurology Service, Rocky Mountain VA Medical Center, Aurora, CO 80045, USA
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31
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Wen X, Sun D, Guo J, Elgner F, Wang M, Hildt E, Cheng A. Multifunctionality of structural proteins in the enterovirus life cycle. Future Microbiol 2019; 14:1147-1157. [PMID: 31368347 DOI: 10.2217/fmb-2019-0127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Members of the genus Enterovirus have a significant effect on human health, especially in infants and children. Since the viral genome has limited coding capacity, Enteroviruses subvert a range of cellular processes for viral infection via the interaction of viral proteins and numerous cellular factors. Intriguingly, the capsid-receptor interaction plays a crucial role in viral entry and has significant implications in viral pathogenesis. Moreover, interactions between structural proteins and host factors occur directly or indirectly in multiple steps of viral replication. In this review, we focus on the current understanding of the multifunctionality of structural proteins in the viral life cycle, which may constitute valuable targets for antiviral and therapeutic interventions.
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Affiliation(s)
- Xingjian Wen
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, Sichuan, PR China.,Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | - Di Sun
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, Sichuan, PR China
| | - Jinlong Guo
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, Sichuan, PR China
| | - Fabian Elgner
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | - Mingshu Wang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, Sichuan, PR China
| | - Eberhard Hildt
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | - Anchun Cheng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, Sichuan, PR China
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Abas OM, Anwar S, Badr Y, Abd-Ellatieff H, Saleh AG, Nayel M, Rahman AAE, Fukushi H, Yanai T. Comparative Neuropathogenesis of Equine Herpesvirus 9 and its Mutant Clone (SP21) Inoculated Intranasally in a Hamster Model. J Comp Pathol 2019; 170:91-100. [PMID: 31375165 DOI: 10.1016/j.jcpa.2019.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/03/2019] [Accepted: 06/08/2019] [Indexed: 11/27/2022]
Abstract
The neuropathogenesis of equine herpesvirus 9 (EHV-9), a neurotropic herpesvirus, and its mutant clone (SP21) was studied experimentally in a hamster model. EHV-9-infected hamsters showed clinical signs of infection at 3 days post infection (dpi), while infection with SP21 resulted in clinical signs at 4 dpi. Clinical signs were more severe in the EHV-9-infected group than in the SP21-infected group. There was a significant difference in the time of anterograde transmission of EHV-9 and SP21 inside the brain. Viraemia was detected in the EHV-9-infected group at 4-5 dpi, while no viraemia was detected in the SP21-infected group. The serum concentration of tumour necrosis factor-α was significantly higher in EHV-9-infected animals than in those infected by SP21 group at 4-5 dpi, but there was no difference in the serum concentration of interferon-γ. The spatiotemporal profiles of viral replication and virus-associated histopathology were remarkably similar, were high in the olfactory bulb and cerebral hemispheres, and decreased progressively towards the medulla oblongata. The mean group scores of the histopathological changes for the entire brain were significantly higher in the EHV-9 group than in the SP21 group at all time points, starting from 3 dpi. These results suggest that the gene products of the open reading frame (ORF)19 and ORF14 play essential roles in the neuropathogenesis of EHV-9, as the two point-mutations detected in SP21 significantly altered the neuropathogenesis of the virus.
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Affiliation(s)
- O M Abas
- Laboratory of Veterinary Microbiology, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan; Department of Animal Medicine, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Sh Anwar
- Department of Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt; Neuroscience Laboratory, CHU Research Center, Faculty of Medicine, Laval University, Quebec City, Canada
| | - Y Badr
- Laboratory of Veterinary Microbiology, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan; Department of Animal Medicine, Faculty of Veterinary Medicine, Damanhour University, El-Beheira, Egypt
| | - H Abd-Ellatieff
- Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan; Department of Pathology and Parasitology, Faculty of Veterinary Medicine, Damanhour University, El-Beheira
| | - A G Saleh
- Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan; Department of Animal Medicine, Faculty of Veterinary Medicine, Damanhour University, El-Beheira, Egypt
| | - M Nayel
- Department of Animal Medicine and Infectious Diseases, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Menoufia, Egypt
| | - A Abd-El Rahman
- Department of Animal Medicine, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - H Fukushi
- Laboratory of Veterinary Microbiology, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - T Yanai
- Laboratory of Veterinary Pathology, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan.
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Chesnut M, Muñoz LS, Harris G, Freeman D, Gama L, Pardo CA, Pamies D. In vitro and in silico Models to Study Mosquito-Borne Flavivirus Neuropathogenesis, Prevention, and Treatment. Front Cell Infect Microbiol 2019; 9:223. [PMID: 31338335 PMCID: PMC6629778 DOI: 10.3389/fcimb.2019.00223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/11/2019] [Indexed: 01/07/2023] Open
Abstract
Mosquito-borne flaviviruses can cause disease in the nervous system, resulting in a significant burden of morbidity and mortality. Disease models are necessary to understand neuropathogenesis and identify potential therapeutics and vaccines. Non-human primates have been used extensively but present major challenges. Advances have also been made toward the development of humanized mouse models, but these models still do not fully represent human pathophysiology. Recent developments in stem cell technology and cell culture techniques have allowed the development of more physiologically relevant human cell-based models. In silico modeling has also allowed researchers to identify and predict transmission patterns and discover potential vaccine and therapeutic candidates. This review summarizes the research on in vitro and in silico models used to study three mosquito-borne flaviviruses that cause neurological disease in humans: West Nile, Dengue, and Zika. We also propose a roadmap for 21st century research on mosquito-borne flavivirus neuropathogenesis, prevention, and treatment.
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Affiliation(s)
- Megan Chesnut
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Laura S. Muñoz
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States,Neuroviruses Emerging in the Americas Study, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Georgina Harris
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Dana Freeman
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Lucio Gama
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States,Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, MD, United States
| | - Carlos A. Pardo
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States,Neuroviruses Emerging in the Americas Study, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - David Pamies
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States,Department of Physiology, University of Lausanne, Lausanne, Switzerland,*Correspondence: David Pamies
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Velay A, Paz M, Cesbron M, Gantner P, Solis M, Soulier E, Argemi X, Martinot M, Hansmann Y, Fafi-Kremer S. Tick-borne encephalitis virus: molecular determinants of neuropathogenesis of an emerging pathogen. Crit Rev Microbiol 2019; 45:472-493. [PMID: 31267816 DOI: 10.1080/1040841x.2019.1629872] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Tick-borne encephalitis virus (TBEV) is a zoonotic agent causing severe encephalitis. The transmission cycle involves the virus, the Ixodes tick vector, and a vertebrate reservoir, such as small mammals (rodents, or shrews). Humans are accidentally involved in this transmission cycle. Tick-borne encephalitis (TBE) has been a growing public health problem in Europe and Asia over the past 30 years. The mechanisms involved in the development of TBE are very complex and likely multifactorial, involving both host and viral factors. The purpose of this review is to provide an overview of the current literature on TBE neuropathogenesis in the human host and to demonstrate the emergence of common themes in the molecular pathogenesis of TBE in humans. We discuss and review data on experimental study models and on both viral (molecular genetics of TBEV) and host (immune response, and genetic background) factors involved in TBE neuropathogenesis in the context of human infection.
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Affiliation(s)
- Aurélie Velay
- Virology Laboratory, University Hospital of Strasbourg , Strasbourg , France.,INSERM, IRM UMR_S 1109 , Strasbourg , France
| | - Magali Paz
- Virology Laboratory, University Hospital of Strasbourg , Strasbourg , France
| | - Marlène Cesbron
- Virology Laboratory, University Hospital of Strasbourg , Strasbourg , France
| | - Pierre Gantner
- Virology Laboratory, University Hospital of Strasbourg , Strasbourg , France.,INSERM, IRM UMR_S 1109 , Strasbourg , France
| | - Morgane Solis
- Virology Laboratory, University Hospital of Strasbourg , Strasbourg , France.,INSERM, IRM UMR_S 1109 , Strasbourg , France
| | | | - Xavier Argemi
- Service des maladies infectieuses et tropicales, Hôpitaux Universitaires de Strasbourg , Strasbourg , France
| | - Martin Martinot
- Service de Médecine Interne et de Rhumatologie, Hôpitaux Civils de Colmar , Colmar , France
| | - Yves Hansmann
- Service des maladies infectieuses et tropicales, Hôpitaux Universitaires de Strasbourg , Strasbourg , France
| | - Samira Fafi-Kremer
- Virology Laboratory, University Hospital of Strasbourg , Strasbourg , France.,INSERM, IRM UMR_S 1109 , Strasbourg , France
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Abstract
The circulation of Zika virus (ZIKV) in nearly 80 countries and territories poses a significant global threat to public health. ZIKV is causally linked to severe developmental defects in the brain, recognized as congenital Zika syndrome (CZS), which includes microcephaly and other serious congenital neurological complications. Since the World Health Organization declared the ZIKV outbreak a public health emergency of international concern, remarkable progress has been made in the generation of different ZIKV infection animal models to gain insight into cellular targets and pathogenesis and to explore the associated underlying mechanisms. Here we focus on summarizing our current understanding of the effects of ZIKV on mammalian brain development in different developmental stages and discuss the potential underlying mechanisms of ZIKV-induced CZS, as well as future perspectives.
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Affiliation(s)
- Dan Xu
- College of Biological Science and Engineering, Institute of Life Sciences, Fuzhou University, Fuzhou 350108, China;
| | - Cui Li
- State Key Laboratory of Molecular Developmental Biology, CAS Center for Excellence in Brain Science and Intelligence Technology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China;
| | - Cheng-Feng Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China;
| | - Zhiheng Xu
- State Key Laboratory of Molecular Developmental Biology, CAS Center for Excellence in Brain Science and Intelligence Technology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; .,Parkinson's Disease Center, Beijing Institute for Brain Disorders, Beijing 100069, China
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36
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Abstract
Flaviviruses are major emerging human pathogens on a global scale. Some flaviviruses can infect the central nervous system of the host and therefore are regarded as neurotropic. The most clinically relevant classical neurotropic flaviviruses include Japanese encephalitis virus, West Nile virus, and tick-borne encephalitis virus. In this review, we focus on these flaviviruses and revisit the concepts of flaviviral neurotropism, neuropathogenicity, neuroinvasion, and resultant neuropathogenesis. We attempt to synthesize the current knowledge about interactions between the central nervous system and flaviviruses from the neuroanatomical and neuropathological perspectives and address some misconceptions and controversies. We hope that revisiting these neuropathological concepts will improve the understanding of flaviviral neuroinfections. This, in turn, may provide further guiding foundations for relevant studies of other emerging or geographically expanding flaviviruses with neuropathogenic potential, such as Zika virus and dengue virus, and pave the way for intelligent therapeutic strategies harnessing potentially beneficial, protective host responses to interfere with disease progression and outcome.
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Affiliation(s)
- Olga A Maximova
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA; ,
| | - Alexander G Pletnev
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA; ,
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37
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Ances BM, Letendre SL. CROI 2019: neurologic complications of HIV disease. Top Antivir Med 2019; 27:26-33. [PMID: 31137000 PMCID: PMC6550359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 03/28/2019] [Indexed: 06/09/2023]
Abstract
Investigators reported many new neuroHIV research findings at the 2019 Conference on Retroviruses and Opportunistic Infections (CROI). These findings included confirmation that HIV-associated neurocognitive disorder (HAND) remains common with an increasingly recognized role for comorbidities (eg, obesity) and neurodegenerative conditions (eg, Alzheimer's disease), especially as persons living with HIV (PLWH) advance into their seventh decade of life and beyond. HAND is increasingly recognized as a heterogeneous disorder that differs between individuals (eg, by sex) in the trajectory of specific neurocognitive abilities (eg, executive functioning). A more recent focus at this year's conference was toxicity of combination antiretroviral therapy: neurocognitive performance and neuroimaging data from several studies were presented but did not consistently support that integrase strand transfer inhibitors are associated with worse neurologic outcomes. Neuroimaging studies found that white matter changes reflect a combination of the effects of HIV and comorbidities (including cerebrovascular small vessel disease) and best correlate with blood markers of inflammation. The pathogenesis of HIV in the central nervous system (CNS) was the focus of a plenary lecture and numerous presentations on HIV compartmentalization in the CNS and cerebrospinal fluid viral escape. Novel findings were also presented on associations between HIV-associated neurologic complications and glycomics, neuron-derived exosomes, and DNA methylation in monocytes. This summary will review findings from CROI and identify new research and clinical opportunities.
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Affiliation(s)
- Beau M. Ances
- Daniel J Brennan Professor In Neurology at Washington University School of Medicine In St. Louis In St. Louis, Missouri
| | - Scott L. Letendre
- Send correspondence to Scott L. Letendre, MD, Professor of Medicine and Psychiatry, University of California San Diego, 220 Dickinson Street, Suite A, San Diego, CA 92103, or
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Juda MB, Brooks AK, Towers AE, Freund GG, McCusker RH, Steelman AJ. Indoleamine 2,3-dioxygenase 1 deletion promotes Theiler's virus-induced seizures in C57BL/6J mice. Epilepsia 2019; 60:626-635. [PMID: 30770561 DOI: 10.1111/epi.14675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/23/2019] [Accepted: 01/23/2019] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Viral encephalitis increases the risk for developing seizures and epilepsy. Indoleamine 2,3-dioxygenase 1 (Ido1) is induced by inflammatory cytokines and functions to metabolize tryptophan to kynurenine. Kynurenine can be further metabolized to produce kynurenic acid and the N-methyl-d-aspartate receptor agonist quinolinic acid (QuinA). In the present study, we sought to determine the role of Ido1 in promoting seizures in an animal model of viral encephalitis. METHODS C57BL/6J and Ido1 knockout mice (Ido1-KO) were infected with Theiler's murine encephalomyelitis virus (TMEV). Quantitative real-time polymerase chain reaction was used to evaluate hippocampal expression of proinflammatory cytokines, Ido1, and viral RNA. Body weights and seizure scores were recorded daily. Elevated zero maze was used to assess differences in behavior, and hippocampal pathology was determined by immunohistochemistry. RESULTS Infected C57BL/6J mice up-regulated proinflammatory cytokines, Ido1, and genes encoding the enzymatic cascade responsible for QuinA production in the kynurenine pathway prior to the onset of seizures. Seizure incidence was elevated in Ido1-KO compared to C57BL/6J mice. Infection increased locomotor activity in Ido1-KO compared to C57BL/6J mice. Furthermore, the occurrence of seizures was associated with hyperexcitability. Neither expression of proinflammatory cytokines nor viral RNA was altered as a result of genotype. Immunohistochemical analysis revealed increased hippocampal pathology in Ido1-KO mice. SIGNIFICANCE Our findings suggest that Ido1 deletion promotes seizures and neuropathogenesis during acute TMEV encephalitis.
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Affiliation(s)
- Michal B Juda
- Department of Animal Sciences, College of Agricultural, Consumer, and Environmental Sciences, Urbana, Illinois
| | - Alexandra K Brooks
- Neuroscience Program, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois
| | - Albert E Towers
- Division of Nutritional Sciences, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois
| | - Gregory G Freund
- Department of Animal Sciences, College of Agricultural, Consumer, and Environmental Sciences, Urbana, Illinois.,Division of Nutritional Sciences, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois.,Department of Pathology, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois
| | - Robert H McCusker
- Department of Animal Sciences, College of Agricultural, Consumer, and Environmental Sciences, Urbana, Illinois.,Neuroscience Program, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois.,Department of Pathology, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois
| | - Andrew J Steelman
- Department of Animal Sciences, College of Agricultural, Consumer, and Environmental Sciences, Urbana, Illinois.,Neuroscience Program, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois.,Division of Nutritional Sciences, College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois
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Abstract
Viral infection in the brain can be acute or chronic, with the responses often producing foci of increasingly cytotoxic inflammation. This can lead to effects beyond the central nervous system (CNS). To stimulate discussion, this commentary addresses four questions: What drives the development of human immunodeficiency virus (HIV)-associated neurocognitive disorders, does the phenotype of macrophages in the CNS spur development of HIV encephalitis (HIVE), does continual activation of astrocytes drive the development of HIV-associated neurocognitive disorders/subclinical disease, and neuroinflammation: friend or foe? A unifying theory that connects each question is the issue of continued activation of glial cells, even in the apparent absence of simian immunodeficiency virus/HIV in the CNS. As the CNS innate immune system is distinct from the rest of the body, it is likely there could be a number of activation profiles not observed elsewhere.
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Affiliation(s)
- Elizabeth C. Delery
- Tulane National Primate Research Center, Covington, Louisiana
- Tulane Program in Biomedical Sciences, Tulane Medical School, New Orleans, Louisiana
- Department of Microbiology and Immunology, Tulane Medical School, New Orleans, Louisiana
| | - Andrew G. MacLean
- Tulane National Primate Research Center, Covington, Louisiana
- Tulane Program in Biomedical Sciences, Tulane Medical School, New Orleans, Louisiana
- Department of Microbiology and Immunology, Tulane Medical School, New Orleans, Louisiana
- Tulane Brain Institute, Tulane University, New Orleans, Louisiana
- Center for Aging, School of Medicine, Tulane University, New Orleans, Louisiana
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40
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Dubé M, Le Coupanec A, Wong AHM, Rini JM, Desforges M, Talbot PJ. Axonal Transport Enables Neuron-to-Neuron Propagation of Human Coronavirus OC43. J Virol 2018; 92:e00404-18. [PMID: 29925652 DOI: 10.1128/JVI.00404-18] [Citation(s) in RCA: 300] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 06/08/2018] [Indexed: 02/08/2023] Open
Abstract
Human coronaviruses (HCoVs) are recognized respiratory pathogens for which accumulating evidence indicates that in vulnerable patients the infection can cause more severe pathologies. HCoVs are not always confined to the upper respiratory tract and can invade the central nervous system (CNS) under still unclear circumstances. HCoV-induced neuropathologies in humans are difficult to diagnose early enough to allow therapeutic interventions. Making use of our already described animal model of HCoV neuropathogenesis, we describe the route of neuropropagation from the nasal cavity to the olfactory bulb and piriform cortex and then the brain stem. We identified neuron-to-neuron propagation as one underlying mode of virus spreading in cell culture. Our data demonstrate that both passive diffusion of released viral particles and axonal transport are valid propagation strategies used by the virus. We describe for the first time the presence along axons of viral platforms whose static dynamism is reminiscent of viral assembly sites. We further reveal that HCoV OC43 modes of propagation can be modulated by selected HCoV OC43 proteins and axonal transport. Our work, therefore, identifies processes that may govern the severity and nature of HCoV OC43 neuropathogenesis and will make possible the development of therapeutic strategies to prevent occurrences.IMPORTANCE Coronaviruses may invade the CNS, disseminate, and participate in the induction of neurological diseases. Their neuropathogenicity is being increasingly recognized in humans, and the presence and persistence of human coronaviruses (HCoV) in human brains have been proposed to cause long-term sequelae. Using our mouse model relying on natural susceptibility to HCoV OC43 and neuronal cell cultures, we have defined the most relevant path taken by HCoV OC43 to access and spread to and within the CNS toward the brain stem and spinal cord and studied in cell culture the underlying modes of intercellular propagation to better understand its neuropathogenesis. Our data suggest that axonal transport governs HCoV OC43 egress in the CNS, leading to the exacerbation of neuropathogenesis. Exploiting knowledge on neuroinvasion and dissemination will enhance our ability to control viral infection within the CNS, as it will shed light on underlying mechanisms of neuropathogenesis and uncover potential druggable molecular virus-host interfaces.
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41
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Yun SI, Song BH, Frank JC, Julander JG, Olsen AL, Polejaeva IA, Davies CJ, White KL, Lee YM. Functional Genomics and Immunologic Tools: The Impact of Viral and Host Genetic Variations on the Outcome of Zika Virus Infection. Viruses 2018; 10:v10080422. [PMID: 30103523 PMCID: PMC6116225 DOI: 10.3390/v10080422] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 12/13/2022] Open
Abstract
Zika virus (ZIKV) causes no-to-mild symptoms or severe neurological disorders. To investigate the importance of viral and host genetic variations in determining ZIKV infection outcomes, we created three full-length infectious cDNA clones as bacterial artificial chromosomes for each of three spatiotemporally distinct and genetically divergent ZIKVs: MR-766 (Uganda, 1947), P6-740 (Malaysia, 1966), and PRVABC-59 (Puerto Rico, 2015). Using the three molecularly cloned ZIKVs, together with 13 ZIKV region-specific polyclonal antibodies covering nearly the entire viral protein-coding region, we made three conceptual advances: (i) We created a comprehensive genome-wide portrait of ZIKV gene products and their related species, with several previously undescribed gene products identified in the case of all three molecularly cloned ZIKVs. (ii) We found that ZIKV has a broad cell tropism in vitro, being capable of establishing productive infection in 16 of 17 animal cell lines from 12 different species, although its growth kinetics varied depending on both the specific virus strain and host cell line. More importantly, we identified one ZIKV-non-susceptible bovine cell line that has a block in viral entry but fully supports the subsequent post-entry steps. (iii) We showed that in mice, the three molecularly cloned ZIKVs differ in their neuropathogenicity, depending on the particular combination of viral and host genetic backgrounds, as well as in the presence or absence of type I/II interferon signaling. Overall, our findings demonstrate the impact of viral and host genetic variations on the replication kinetics and neuropathogenicity of ZIKV and provide multiple avenues for developing and testing medical countermeasures against ZIKV.
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Affiliation(s)
- Sang-Im Yun
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
| | - Byung-Hak Song
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
| | - Jordan C Frank
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
| | - Justin G Julander
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
- Institute for Antiviral Research, Utah State University, Logan, UT 84322, USA.
| | - Aaron L Olsen
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
| | - Irina A Polejaeva
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
- Veterinary Diagnostics and Infectious Diseases, Utah Science Technology and Research, Utah State University, Logan, UT 84341, USA.
| | - Christopher J Davies
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
- Veterinary Diagnostics and Infectious Diseases, Utah Science Technology and Research, Utah State University, Logan, UT 84341, USA.
| | - Kenneth L White
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
- Veterinary Diagnostics and Infectious Diseases, Utah Science Technology and Research, Utah State University, Logan, UT 84341, USA.
| | - Young-Min Lee
- Department of Animal Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA.
- Veterinary Diagnostics and Infectious Diseases, Utah Science Technology and Research, Utah State University, Logan, UT 84341, USA.
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Kellman EM, Offerdahl DK, Melik W, Bloom ME. Viral Determinants of Virulence in Tick-Borne Flaviviruses. Viruses 2018; 10:v10060329. [PMID: 29914165 PMCID: PMC6024809 DOI: 10.3390/v10060329] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/12/2018] [Accepted: 06/15/2018] [Indexed: 12/27/2022] Open
Abstract
Tick-borne flaviviruses have a global distribution and cause significant human disease, including encephalitis and hemorrhagic fever, and often result in neurologic sequelae. There are two distinct properties that determine the neuropathogenesis of a virus. The ability to invade the central nervous system (CNS) is referred to as the neuroinvasiveness of the agent, while the ability to infect and damage cells within the CNS is referred to as its neurovirulence. Examination of laboratory variants, cDNA clones, natural isolates with varying pathogenicity, and virally encoded immune evasion strategies have contributed extensively to our understanding of these properties. Here we will review the major viral determinants of virulence that contribute to pathogenesis and influence both neuroinvasiveness and neurovirulence properties of tick-borne flaviviruses, focusing particularly on the envelope protein (E), nonstructural protein 5 (NS5), and the 3′ untranslated region (UTR).
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Affiliation(s)
- Eliza M Kellman
- Laboratory of Virology, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, MT 59840, USA.
| | - Danielle K Offerdahl
- Laboratory of Virology, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, MT 59840, USA.
| | - Wessam Melik
- School of Medical Sciences, Orebro University, SE-703 62 Örebro, Sweden.
| | - Marshall E Bloom
- Laboratory of Virology, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, MT 59840, USA.
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Abstract
Dengue counts among the most commonly encountered arboviral diseases, representing the fastest spreading tropical illness in the world. It is prevalent in 128 countries, and each year >2.5 billion people are at risk of dengue virus infection worldwide. Neurological signs of dengue infection are increasingly reported. In this review, the main neurological complications of dengue virus infection, such as central nervous system (CNS), peripheral nervous system, and ophthalmic complications were discussed according to clinical features, treatment and possible pathogenesis. In addition, neurological complications in children were assessed due to their atypical clinical features. Finally, dengue infection and Japanese encephalitis were compared for pathogenesis and main clinical manifestations.
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Affiliation(s)
- Guo-Hong Li
- Department of Neurology, Jinan Central Hospital Affiliated to Shandong University, Jinan, China
| | - Zhi-Jie Ning
- Jinan Infectious Diseases Hospital, Jinan, China
| | - Yi-Ming Liu
- Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
| | - Xiao-Hong Li
- Department of Neurology, Jinan Central Hospital Affiliated to Shandong University, Jinan, China
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Di Guardo G. Commentary: Toxoplasma depends on lysosomal consumption of autophagosomes for persistent infection. Front Microbiol 2017; 8:1876. [PMID: 29018434 PMCID: PMC5623044 DOI: 10.3389/fmicb.2017.01876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 09/13/2017] [Indexed: 11/13/2022] Open
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Verpoest S, Cay B, Favoreel H, De Regge N. Age-Dependent Differences in Pseudorabies Virus Neuropathogenesis and Associated Cytokine Expression. J Virol 2017; 91:e02058-16. [PMID: 27852848 DOI: 10.1128/JVI.02058-16] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 11/03/2016] [Indexed: 11/20/2022] Open
Abstract
The severity of clinical symptoms induced by pseudorabies virus (PRV) infection of its natural host is inversely related to the age of the pig. During this study, 2- and 15-week-old pigs were inoculated with PRV strain NIA3. This resulted in important clinical disease, although the associated morbidity and mortality were lower in older pigs. Quantitative PCR analysis of viral DNA in different organs confirmed the general knowledge on PRV pathogenesis. Several new findings and potential explanations for the observed age-dependent differences in virulence, however, were determined from the study of viral and cytokine mRNA expression at important sites of neuropathogenesis. First, only limited viral and cytokine mRNA expression was detected in the nasal mucosa, suggesting that other sites may serve as the primary replication site. Second, PRV reached the trigeminal ganglion (TG) and brain stem rapidly upon infection but, compared to 2-week-old pigs, viral replication was less pronounced in 15-week-old pigs, and the decrease in viral mRNA expression was not preceded by or associated with an increased cytokine expression. Third, extensive viral replication associated with a robust expression of cytokine mRNA was detected in the olfactory bulbs of pigs from both age categories and correlated with the observed neurological disease. Our results suggest that age-dependent differences in PRV-induced clinical signs are probably due to enhanced viral replication and associated immunopathology in immature TG and the central nervous system neurons of 2-week-old pigs and that neurological disease is related with extensive viral replication and an associated immune response in the olfactory bulb. IMPORTANCE It is well known that alphaherpesvirus infections of humans and animals result in more severe clinical disease in newborns than in older individuals and that this is probably related to differences in neuropathogenesis. The underlying mechanisms, however, remain unclear. Pseudorabies virus infection of its natural host, the pig, provides a suitable infection model to study this more profoundly. We show here that the severe neurological disease observed in 2-week-old pigs does not appear to be related to a hampered innate immune response but is more likely to reflect the immature development state of the trigeminal ganglia (TG) and central nervous system (CNS) neurons, resulting in an inefficient suppression of viral replication. In 15-week-old pigs, viral replication was efficiently suppressed in the TG and CNS without induction of an extensive immune response. Furthermore, our results provide evidence that neurological disease could, at least in part, be related to viral replication and associated immunopathology in the olfactory bulb.
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46
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Spudich SS, Ances BM. CROI 2017: Neurologic Complications of HIV Infection. Top Antivir Med 2017; 25:69-76. [PMID: 28598791 PMCID: PMC5677044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The brain is a major target for HIV infection and is a potential viral reservoir even in virologically well-controlled HIV-infected individuals. Data presented at the 2017 Conference on Retroviruses and Opportunistic Infections (CROI) suggested that during early HIV infection, CD4+ T cells in the meninges and choroid plexus serve as an important early site of HIV infection in the central nervous system (CNS), with brain macrophages and microglial cells becoming an important source of viral replication with advancing disease. Longitudinal evaluations of HIV-associated neurocognitive disorder (HAND) demonstrated that cognitive changes occur during early HIV infection and may remain during chronic infection despite virologic control by antiretroviral therapy. Cerebrospinal fluid escape during treatment was noted in numerous cohorts and pathogenetically evaluated as a state of persistent CNS HIV infection despite antiretroviral therapy. Non-HIV risk factors identified for cognitive impairment were depression and frailty. Questions remain concerning appropriate cognitive screening tests to evaluate for HAND. Additional studies highlighted the increasing role of neuroimaging to longitudinally assess potential changes in brain integrity in individuals on systemically suppressive therapy, and provided new CNS considerations in antiretroviral regimens.
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Affiliation(s)
- Serena S. Spudich
- Send correspondence to Serena S. Spudich, MD, Yale University Department of Neurology, PO Box 208018, New Haven, CT 06520, or
| | - Beau M. Ances
- Professor of Neurology at Washington University in St Louis, Missouri
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Abstract
OBJECTIVE The objective was to determine whether maraviroc (MVC) has unique neurocognitive benefits in the context of initial antiretroviral therapy (ART). DESIGN Randomized, double-blind, placebo-controlled, 48-week trial. SETTING Participants were enrolled in US AIDS Clinical Trials Group clinical trial sites. PARTICIPANTS Total 262 ART-naive, chemokine coreceptor 5 tropic HIV, and HIV RNA greater than 1000 copies/ml participants were randomized, 230 participants completed the study. INTERVENTION Participants received MVC 150 mg or tenofovir disoproxil fumarate (TDF) 300 mg on a background of ritonavir-boosted darunavir and emtricitabine. MAIN OUTCOME MEASURE(S) The neuropsychological battery of 15 tests done at baseline, week 24 and week 48 assessed seven domains, and were standardized into z-scores then converted into deficit scores and a global deficit score. The 48-week changes from baseline in the neuropsychological scores and the global deficit score were compared by Wilcoxon or Kruskal-Wallis test between arms, and among baseline impairment groups [classified as normal, mild (2 deficit scores ≥1) and moderate (2 deficit scores ≥2)]. It was hypothesized that the MVC arm would have improved neuropsychological performance over TDF. RESULTS In this double-blind, randomized, placebo-controlled trial, there were no differences in neuropsychological performance between MVC and TDF. Those with moderate neuropsychological impairment at baseline experienced greater ART-mediated neuropsychological improvement than those with mild or no neuropsychological impairment. CONCLUSION Improvement in neurocognitive functioning was greater with more baseline impairment but was comparable with MVC or TDF.
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Affiliation(s)
- Kevin R Robertson
- aUniversity of North Carolina at Chapel Hill, Chapel Hill, North Carolina bHarvard University, Boston, Massachusetts cJohns Hopkins Hospital, Baltimore, Maryland dNorthwestern University, Chicago, Illinois eFrontier Science & Technology, Amherst, New York, USA
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48
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Mesquita LP, Diaz MH, Howerth EW, Stallknecht DE, Noblet R, Gray EW, Mead DG. Pathogenesis of Vesicular Stomatitis New Jersey Virus Infection in Deer Mice ( Peromyscus maniculatus) Transmitted by Black Flies ( Simulium vittatum). Vet Pathol 2016; 54:74-81. [PMID: 27312365 DOI: 10.1177/0300985816653172] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The natural transmission of vesicular stomatitis New Jersey virus (VSNJV), an arthropod-borne virus, is not completely understood. Rodents may have a role as reservoir or amplifying hosts. In this study, juvenile and nestling deer mice ( Peromyscus maniculatus) were exposed to VSNJV-infected black fly ( Simulium vittatum) bites followed by a second exposure to naive black flies on the nestling mice. Severe neurological signs were observed in some juvenile mice by 6 to 8 days postinoculation (DPI); viremia was not detected in 25 juvenile deer mice following exposure to VSNJV-infected fly bites. Both juvenile and nestling mice had lesions and viral antigen in the central nervous system (CNS); in juveniles, their distribution suggested that the sensory pathway was the most likely route to the CNS. In contrast, a hematogenous route was probably involved in nestling mice, since all of these mice developed viremia and had widespread antigen distribution in the CNS and other tissues on 2 DPI. VSNJV was recovered from naive flies that fed on viremic nestling mice. This is the first report of viremia in a potential natural host following infection with VSNJV via insect bite and conversely of an insect becoming infected with VSNJV by feeding on a viremic host. These results, along with histopathology and immunohistochemistry, show that nestling mice have widespread dissemination of VSNJV following VSNJV-infected black fly bite and are a potential reservoir or amplifying host for VSNJV.
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Affiliation(s)
- L P Mesquita
- 1 Department of Pathology, University of Georgia, Athens, GA, USA.,2 Department of Pathology, University of São Paulo, São Paulo, Brazil
| | - M H Diaz
- 3 Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,4 Centers for Disease Control and Prevention, Division of Bacterial Diseases, Respiratory Diseases Branch, Atlanta, GA, USA
| | - E W Howerth
- 1 Department of Pathology, University of Georgia, Athens, GA, USA
| | - D E Stallknecht
- 3 Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - R Noblet
- 5 Department of Entomology, University of Georgia, Athens, GA, USA
| | - E W Gray
- 5 Department of Entomology, University of Georgia, Athens, GA, USA
| | - D G Mead
- 3 Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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49
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Ong KC, Wong KT. Understanding Enterovirus 71 Neuropathogenesis and Its Impact on Other Neurotropic Enteroviruses. Brain Pathol 2016; 25:614-24. [PMID: 26276025 DOI: 10.1111/bpa.12279] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 06/19/2015] [Indexed: 01/27/2023] Open
Abstract
Enterovirus A71 (EV-A71) belongs to the species group A in the Enterovirus genus within the Picornaviridae family. EV-A71 usually causes self-limiting hand, foot and mouth disease or herpangina but rarely causes severe neurological complications such as acute flaccid paralysis and encephalomyelitis. The pathology and neuropathogenesis of these neurological syndromes is beginning to be understood. EV-A71 neurotropism for motor neurons in the spinal cord and brainstem, and other neurons, is mainly responsible for central nervous system damage. This review on the general aspects, recent developments and advances of EV-A71 infection will focus on neuropathogenesis and its implications on other neurotropic enteroviruses, such as poliovirus and the newly emergent Enterovirus D68. With the imminent eradication of poliovirus, EV-A71 is likely to replace it as an important neurotropic enterovirus of worldwide importance.
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Affiliation(s)
- 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
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50
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Spudich SS, Ances BM. CROI 2016: Neurologic Complications of HIV Infection. Top Antivir Med 2016; 24:29-37. [PMID: 27398860 PMCID: PMC6148921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 03/17/2016] [Indexed: 06/06/2023]
Abstract
The brain remains a major target for HIV infection and a site of potential complications for HIV-infected individuals. Emerging data presented at the 2016 Conference on Retroviruses and Opportunistic Infections suggest that during the early stages of infection, activated CD4+ cells may traffic the virus into the central nervous system (CNS). HIV is detectable in cells and tissues of the CNS in some individuals despite suppressive antiretroviral treatment. A potential source of cerebrospinal fluid HIV escape may be compartmentalized HIV replication within macrophage lineage cells. Virally infected cells can traffic out of the CNS and may have the potential to reseed the systemic compartment. Additional modifiers of HIV-associated neurocognitive disorder (HAND) were identified, including female sex and hepatic dysfunction. Large epidemiologic studies reported an elevated risk of stroke among HIV-infected individuals, related to traditional vascular risk factors, history of recreational drug use, and HIV measures (lower CD4+ cell nadir and higher viral load). Brain imaging may provide a noninvasive means for detecting early changes in the brain associated with HIV infection and may assist in prognosis of HAND. Some potential adjunctive therapies to standard antiretroviral therapy for HIV-infected individuals were considered.
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