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Viettri M, Caraballo G, Sanchez ME, Espejel-Nuñez A, Betanzos A, Ortiz-Navarrete V, Estrada-Gutierrez G, Nava P, Ludert JE. Comparative Infections of Zika, Dengue, and Yellow Fever Viruses in Human Cytotrophoblast-Derived Cells Suggest a Gating Role for the Cytotrophoblast in Zika Virus Placental Invasion. Microbiol Spectr 2023; 11:e0063023. [PMID: 37227282 PMCID: PMC10269719 DOI: 10.1128/spectrum.00630-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 05/01/2023] [Indexed: 05/26/2023] Open
Abstract
The Zika virus (ZIKV) is teratogenic and considered a TORCH pathogen (toxoplasmosis [Toxoplasma gondii], rubella, cytomegalovirus, herpes simplex virus [HSV], and other microorganisms capable of crossing the blood-placenta barrier). In contrast, the related flavivirus dengue virus (DENV) and the attenuated yellow fever virus vaccine strain (YFV-17D) are not. Understanding the mechanisms used by ZIKV to cross the placenta is necessary. In this work, parallel infections with ZIKV of African and Asian lineages, DENV, and YFV-17D were compared for kinetics and growth efficiency, activation of mTOR pathways, and cytokine secretion profile using cytotrophoblast-derived HTR8 cells and monocytic U937 cells differentiated to M2 macrophages. In HTR8 cells, ZIKV replication, especially the African strain, was significantly more efficient and faster than DENV or YFV-17D. In macrophages, ZIKV replication was also more efficient, although differences between strains were reduced. Greater activation of the mTORC1 and mTORC2 pathways in HTR8 cells infected with ZIKV than with DENV or YFV-17D was observed. HTR8 cells treated with mTOR inhibitors showed a 20-fold reduction in ZIKV yield, versus 5- and 3.5-fold reductions for DENV and YFV-17D, respectively. Finally, infection with ZIKV, but not DENV or YFV-17D, efficiently inhibited the interferon (IFN) and chemoattractant responses in both cell lines. These results suggest a gating role for the cytotrophoblast cells in favoring entry of ZIKV, but not DENV and YFV-17D, into the placental stroma. IMPORTANCE Zika virus acquisition during pregnancy is associated with severe fetal damage. The Zika virus is related to dengue virus and yellow fever virus, yet fetal damage has not been related to dengue or inadvertent vaccination for yellow fever during pregnancy. Mechanisms used by the Zika virus to cross the placenta need to be deciphered. By comparing parallel infections of Zika virus strains belonging to the African and Asian lineages, dengue virus, and the yellow fever vaccine virus strain YFV-17D in placenta-derived cytotrophoblast cells and differentiated macrophages, evidence was found that Zika virus infections, especially by the African strains, were more efficient in cytotrophoblast cells than dengue virus or yellow fever vaccine virus strain infections. Meanwhile, no significant differences were observed in macrophages. Robust activation of the mTOR signaling pathways and inhibition of the IFN and chemoattractant response appear to be related to the better growth capacity of the Zika viruses in the cytotrophoblast-derived cells.
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Affiliation(s)
- Mercedes Viettri
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | - Gerson Caraballo
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | - Maria Elena Sanchez
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | | | - Abigail Betanzos
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | - Vianney Ortiz-Navarrete
- Department of Molecular Biomedicine, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | | | - Porfirio Nava
- Department of Biophysical Physiology and Neuroscience, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | - Juan E. Ludert
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
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2
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Benninger F, Steiner I. Non-infectious mechanisms of neurological damage due to infection. J Neurol Sci 2021; 431:120057. [PMID: 34800841 DOI: 10.1016/j.jns.2021.120057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 11/03/2021] [Accepted: 11/08/2021] [Indexed: 10/19/2022]
Abstract
Infections of the nervous system is a growing aspect of clinical neurology. Accumulating knowledge in early diagnosis, course, therapy and prognosis is enlarging the clinical tools required for effective therapy. Of special importance is the ability to differentiate between proper infections, where anti-microbial agents, when available, should be introduced and used and post infectious conditions where therapy is mainly directed against the host immune system. The two conditions sometimes overlap, a situation that requires the ability to combine clinical skills with the use of laboratory tools such as polymerase chain reaction (PCR), serology, and antigenic detection. In the era of the SARS-CoV-2 pandemic, the need to make this distinction is emphasized as correct diagnosis of post infectious conditions and expedited therapy is important and sometimes lifesaving. We here attempt to present several infectious agents and their possible indirect damage to the nervous system causing in some cases significant neurological deficits. We try to limit our focus on those mechanisms which do not involve the direct tissue damage by the infectious agents but rather are connected to para- and post-infectious mechanisms. We attempt to delineate the features that will enable to tailor the correct diagnosis and following the effective therapy.
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Affiliation(s)
- Felix Benninger
- Felsenstein Medical Research Center, Petach Tikva, Israel; Department of Neurology, Rabin Medical Center, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Israel Steiner
- Department of Neurology, Rabin Medical Center, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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3
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Are Zika virus cross-reactive antibodies against aquaporin-4 associated to Neuromyelitis Optica Spectrum Disorder? J Neuroimmunol 2021; 360:577697. [PMID: 34461359 DOI: 10.1016/j.jneuroim.2021.577697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 08/03/2021] [Accepted: 08/18/2021] [Indexed: 12/28/2022]
Abstract
Zika virus (ZIKV) infection has been associated with the development of Neuromyelitis Optica Spectrum Disorder (NMOSD). ZIKV-induced antibodies that putatively cross-react to aquaporin-4 (AQP4) protein are suggested to cause inflammation of the optic nerve. A region of similarity between AQP4 and the ZIKV NS2B protein was identified. Our data showed that ZIKV-associated NMOSD patients develop anti-AQP4 antibodies, but not anti-ZIKV NS2B antibodies, revealing that cross-reacting antibodies are not the underlying cause of this phenotype. ZIKV infection in mice showed persistent viral replication in the eye tissue, suggesting that NMOSD symptoms are consequence of viral infection of the optic nerve cells.
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4
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Li M, Zhang D, Li C, Zheng Z, Fu M, Ni F, Liu Y, Du T, Wang H, Griffin GE, Zhang M, Hu Q. Characterization of Zika Virus Endocytic Pathways in Human Glioblastoma Cells. Front Microbiol 2020; 11:242. [PMID: 32210929 PMCID: PMC7069030 DOI: 10.3389/fmicb.2020.00242] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 01/31/2020] [Indexed: 12/20/2022] Open
Abstract
Zika virus (ZIKV) infections can cause microcephaly and neurological disorders. However, the early infection events of ZIKV in neural cells remain to be characterized. Here, by using a combination of pharmacological and molecular approaches and the human glioblastoma cell T98G as a model, we first observed that ZIKV infection was inhibited by chloroquine and NH4Cl, indicating a requirement of low intracellular pH. We further showed that dynamin is required as the ZIKV entry was affected by the specific inhibitor dynasore, small interfering RNA (siRNA) knockdown of dynamin, or by expressing the dominant-negative K44A mutant. Moreover, the ZIKV entry was significantly inhibited by chlorpromazine, pitstop2, or siRNA knockdown of clathrin heavy chain, indicating an involvement of clathrin-mediated endocytosis. In addition, genistein treatment, siRNA knockdown of caveolin-1, or overexpression of a dominant-negative caveolin mutant impacted the ZIKV entry, with ZIKV particles being observed to colocalize with caveolin-1, implying that caveola endocytosis can also be involved. Furthermore, we found that the endocytosis of ZIKV is dependent on membrane cholesterol, microtubules, and actin cytoskeleton. Importantly, ZIKV infection was inhibited by silencing of Rab5 and Rab7, while confocal microscopy showed that ZIKV particles localized in Rab5- and Rab7-postive endosomes. These results indicated that, after internalization, ZIKV likely moves to Rab5-positive early endosome and Rab7-positive late endosomes before delivering its RNA into the cytoplasm. Taken together, our study, for the first time, described the early infection events of ZIKV in human glioblastoma cell T98G.
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Affiliation(s)
- Mei Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Di Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Chuntian Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zifeng Zheng
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Ming Fu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Fengfeng Ni
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yalan Liu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Tao Du
- CAS Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Hanzhong Wang
- CAS Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - George E Griffin
- Institute for Infection and Immunity, St George's, University of London, London, United Kingdom
| | - Mudan Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Qinxue Hu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,Institute for Infection and Immunity, St George's, University of London, London, United Kingdom
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5
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Aspahan MC, Leonhard SE, Gomez RS, Rocha EDS, Vilela MRDS, Alvarenga PPM, Marinho PES, Kroon EG, Meira F. Neuromyelitis optica spectrum disorder associated with Zika virus infection. Neurol Clin Pract 2018; 9:e1-e3. [PMID: 30859012 DOI: 10.1212/cpj.0000000000000546] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/14/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Maíra Cardoso Aspahan
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Sonja Emily Leonhard
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Rodrigo Santiago Gomez
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Eder da Silva Rocha
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Michelle Ramos da Silva Vilela
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Pedro Paulo Martins Alvarenga
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Paula Eillanny Silva Marinho
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Erna Geessien Kroon
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Fidel Meira
- Department of Neurology (MCA, RSG, EdSR, MRdSV, FM), Madre Teresa Hospital, Belo Horizonte, Brazil; Department of Neurology (SEL), Erasmus University Medical School, Rotterdam, the Netherlands; and Virus Laboratory (PPMA, PESM, EGK), Federal University of Minas Gerais, Belo Horizonte, Brazil
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6
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Singh S, Kumar A. Ocular Manifestations of Emerging Flaviviruses and the Blood-Retinal Barrier. Viruses 2018; 10:v10100530. [PMID: 30274199 PMCID: PMC6213219 DOI: 10.3390/v10100530] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 12/19/2022] Open
Abstract
Despite flaviviruses remaining the leading cause of systemic human infections worldwide, ocular manifestations of these mosquito-transmitted viruses are considered relatively uncommon in part due to under-reporting. However, recent outbreaks of Zika virus (ZIKV) implicated in causing multiple ocular abnormalities, such as conjunctivitis, retinal hemorrhages, chorioretinal atrophy, posterior uveitis, optic neuritis, and maculopathies, has rejuvenated a significant interest in understanding the pathogenesis of flaviviruses, including ZIKV, in the eye. In this review, first, we summarize the current knowledge of the major flaviviruses (Dengue, West Nile, Yellow Fever, and Japanese Encephalitis) reported to cause ocular manifestations in humans with emphasis on recent ZIKV outbreaks. Second, being an immune privilege organ, the eye is protected from systemic infections by the presence of blood-retinal barriers (BRB). Hence, we discuss how flaviviruses modulate retinal innate response and breach the protective BRB to cause ocular or retinal pathology. Finally, we describe recently identified infection signatures of ZIKV and discuss whether these system biology-predicted genes or signaling pathways (e.g., cellular metabolism) could contribute to the pathogenesis of ocular manifestations and assist in the development of ocular antiviral therapies against ZIKV and other flaviviruses.
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Affiliation(s)
- Sneha Singh
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University, Detroit, MI 48201, USA.
| | - Ashok Kumar
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University, Detroit, MI 48201, USA.
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University, Detroit, MI 48201, USA.
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7
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Sze A, Olagnier D, Hadj SB, Han X, Tian XH, Xu HT, Yang L, Shi Q, Wang P, Wainberg MA, Wu JH, Lin R. Sophoraflavenone G Restricts Dengue and Zika Virus Infection via RNA Polymerase Interference. Viruses 2017; 9:v9100287. [PMID: 28972551 PMCID: PMC5691638 DOI: 10.3390/v9100287] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 09/28/2017] [Accepted: 10/01/2017] [Indexed: 12/26/2022] Open
Abstract
Flaviviruses including Zika, Dengue and Hepatitis C virus cause debilitating diseases in humans, and the former are emerging as global health concerns with no antiviral treatments. We investigated Sophora Flavecens, used in Chinese medicine, as a source for antiviral compounds. We isolated Sophoraflavenone G and found that it inhibited Hepatitis C replication, but not Sendai or Vesicular Stomatitis Virus. Pre- and post-infection treatments demonstrated anti-flaviviral activity against Dengue and Zika virus, via viral RNA polymerase inhibition. These data suggest that Sophoraflavenone G represents a promising candidate regarding anti-Flaviviridae research.
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Affiliation(s)
- Alexandre Sze
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - David Olagnier
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Samar Bel Hadj
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Xiaoying Han
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Xiao Hong Tian
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Hong-Tao Xu
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Long Yang
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA.
| | - Qingwen Shi
- School of Pharmaceutical Sciences, Hebei Medical University, Shijiazhuang, Hebei 050017, China.
| | - Penghua Wang
- Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA.
| | - Mark A Wainberg
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Jian Hui Wu
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
| | - Rongtuan Lin
- Department of Medicine, Lady Davis Institute-Jewish General Hospital, McGill University, Montreal, QC, H3T 1E2, Canada.
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8
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Devakumar D, Bamford A, Ferreira MU, Broad J, Rosch RE, Groce N, Breuer J, Cardoso MA, Copp AJ, Alexandre P, Rodrigues LC, Abubakar I. Infectious causes of microcephaly: epidemiology, pathogenesis, diagnosis, and management. THE LANCET. INFECTIOUS DISEASES 2017; 18:e1-e13. [PMID: 28844634 DOI: 10.1016/s1473-3099(17)30398-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 06/02/2017] [Accepted: 06/15/2017] [Indexed: 01/08/2023]
Abstract
Microcephaly is an important sign of neurological malformation and a predictor of future disability. The 2015-16 outbreak of Zika virus and congenital Zika infection brought the world's attention to links between Zika infection and microcephaly. However, Zika virus is only one of the infectious causes of microcephaly and, although the contexts in which they occur vary greatly, all are of concern. In this Review, we summarise important aspects of major congenital infections that can cause microcephaly, and describe the epidemiology, transmission, clinical features, pathogenesis, management, and long-term consequences of these infections. We include infections that cause substantial impairment: cytomegalovirus, herpes simplex virus, rubella virus, Toxoplasma gondii, and Zika virus. We highlight potential issues with classification of microcephaly and show how some infants affected by congenital infection might be missed or incorrectly diagnosed. Although Zika virus has brought the attention of the world to the problem of microcephaly, prevention of all infectious causes of microcephaly and appropriately managing its consequences remain important global public health priorities.
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Affiliation(s)
- Delan Devakumar
- Institute for Global Health, University College London, London, UK.
| | - Alasdair Bamford
- Infectious Diseases Department, Great Ormond Street Hospital, London, UK; Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Marcelo U Ferreira
- Department of Parasitology, Institute for Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Jonathan Broad
- Department of Paediatrics, University of Oxford, Oxford, UK
| | - Richard E Rosch
- Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Nora Groce
- Leonard Cheshire Disability and Inclusive Development Centre, University College London, London, UK
| | - Judith Breuer
- Division of Infection and Immunity, University College London, London, UK
| | - Marly A Cardoso
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil
| | - Andrew J Copp
- Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Paula Alexandre
- Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Laura C Rodrigues
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - Ibrahim Abubakar
- Institute for Global Health, University College London, London, UK
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9
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Wiley CA, Chimelli L. Human Zika and West Nile virus neurological infections: What is the difference? Neuropathology 2017; 37:393-397. [PMID: 28493351 DOI: 10.1111/neup.12385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 03/23/2017] [Indexed: 11/26/2022]
Abstract
The recent epidemic of West Nile Virus (WNV) infection in the United States was associated with severe neurological disease in immunocompromised hosts, while the emergence of Zika virus infection in the Americas has been notable for an association with increased microcephaly in the fetuses of infected mothers. Rare autopsies of WNV infected humans have shown multiple organ involvement with a clear neurotropism. We have recently had the opportunity to examine the distribution of Zika virus in autopsies of newborns from infected pregnancies. While both viruses infect multiple organs, Zika appears to cause neurological disease in the fetus through two different mechanisms. Infection during the first trimester showed the potential to infect neural progenitor cells causing severe developmental abnormalities, while infection later in gestation was associated with meningeal infection and destructive ischemic lesions of the brain. Both viruses infect kidney tubules but Zika shares a prominent hepatotropism characteristic of other flaviviruses (e.g., Dengue). Limited transplacental Zika infection would be consistent with restriction to primary maternal infections with high viremia. In the absence of a vaccine, restriction of travel by immunosuppressed and pregnant non-immune individuals to endemic regions seems prudent.
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Affiliation(s)
- Clayton A Wiley
- University of Pittsburgh School of Medicine, Department of Pathology, Pittsburgh, Pennsylvania, USA
| | - Leila Chimelli
- Laboratory of Neuropathology, State Institute of Brain Paulo Niemeyer, Rio de Janeiro, Brazil
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10
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Avšic Županc T, Petrovec M. Zika: an old virus with a new face. Zdr Varst 2016; 55:228-230. [PMID: 27703544 PMCID: PMC5030833 DOI: 10.1515/sjph-2016-0031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 08/12/2016] [Indexed: 12/05/2022] Open
Abstract
Zika virus is a mosquito-borne flavivirus that represents a public health emergency at the ongoing epidemic. This obscure virus was limited to sporadic cases in Africa and Asia, until the emergence of Zika virus in Brazil in 2015, when it rapidly spread throughout the Americas. Most Zika virus infections are subclinical or characterized by mild febrile illness. However, neurological complications, including Guillain-Barré syndrome in adults, and congenital anomalies, including microcephaly in babies born to infected mothers, raised a grave concern. Currently, there is no specific antiviral treatment or vaccine available for Zika virus infection. Thus, international public health response is primarily focused on preventing infection, particularly in pregnant women, and on providing up-to-date recommendations to reduce the risk of non-vector transmission of Zika virus.
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Affiliation(s)
- Tatjana Avšic Županc
- University of Ljubljana, Faculty of Medicine, Institute of Microbiology and Immunology, Zaloška 4, 1000 Ljubljana, Slovenia
| | - Miroslav Petrovec
- University of Ljubljana, Faculty of Medicine, Institute of Microbiology and Immunology, Zaloška 4, 1000 Ljubljana, Slovenia
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11
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Tang BL. Zika virus as a causative agent for primary microencephaly: the evidence so far. Arch Microbiol 2016; 198:595-601. [PMID: 27412681 DOI: 10.1007/s00203-016-1268-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 06/30/2016] [Accepted: 07/08/2016] [Indexed: 02/06/2023]
Abstract
Zika virus (ZIKV) infection has been associated with congenital microcephaly and peripheral neuropathy. The ongoing epidemic has triggered swift responses in the scientific community, and a number of recent reports have now confirmed a causal relationship between ZIKV infection and birth defect. In particular, ZIKV has been shown to be capable of compromising and crossing the placental barrier and infect the developing fetal brain, resulting in the demise and functional impairment of neuroprogenitor cells critical for fetal cortex development. Here, the evidence for ZIKV as a teratogenic agent that causes microcephaly is reviewed, and its association with other disorders is discussed.
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Affiliation(s)
- Bor Luen Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, MD7, 8 Medical Drive, Singapore, 117597, Singapore.
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore.
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