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Zika infections and complications

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https://www.readbyqxmd.com/read/28095299/african-and-asian-zika-virus-strains-differentially-induce-early-antiviral-responses-in-primary-human-astrocytes
#1
Rodolphe Hamel, Pauline Ferraris, Sineewanlaya Wichit, Fodé Diop, Loïc Talignani, Julien Pompon, Déborah Garcia, Florian Liegeois, Amadou A Sall, Hans Yssel, Dorothée Missé
ZIKA virus (ZIKV) is a newly emerging arbovirus. Since its discovery 60years ago in Uganda, it has spread throughout the Pacific, Latin America and the Caribbean, emphasizing the capacity of ZIKV to spread to non-endemic regions worldwide. Although infection with ZIKV often leads to mild disease, its recent emergence in the Americas has coincided with an increase in adults developing Guillain-Barré syndrome and neurological complications in new-borns, such as congenital microcephaly. Many questions remain unanswered regarding the complications caused by different primary isolates of ZIKV...
January 14, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28058206/zika-virus-disease-for-neurologists
#2
REVIEW
Daniel E Smith, J David Beckham, Kenneth L Tyler, Daniel M Pastula
PURPOSE OF REVIEW: Zika virus (ZIKV) was not initially thought to be an important cause of neurologic disease, but with the recent epidemic in the Western Hemisphere, there is a growing body of evidence for possible neurologic complications. This review discusses these in addition to what is known about modes of transmission, testing for the virus, as well as future directions. RECENT FINDINGS: ZIKV disease has been associated with microcephaly and congenital eye disease in infants, as well as with Guillain-Barré syndrome, uveitis, myelitis, and meningoencephalitis in adults...
December 2016: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/28039355/dengue-virus-denv-specific-antibodies-enhance-brazilian-zika-virus-zikv-infection
#3
Priscila Ms Castanha, Eduardo J M Nascimento, Braga Cynthia, Marli T Cordeiro, Otávio V de Carvalho, Leila R de Mendonça, Elisa An Azevedo, Rafael Fo França, Dhalia Rafael, Ernesto Ta Marques
Anti-Flavivirus antibodies are highly cross-reactive and may facilitate Zika virus (ZIKV) infection through the antibody-dependent enhancement (ADE) mechanism. We demonstrate that dengue-specific antibodies enhance the infection of a primary Brazilian ZIKV isolate in FcγRII-expressing K562 cell line. In addition, we demonstrate that serum samples from dengue-immune pregnant women enhanced ZIKV infection. These findings highlight the need of epidemiological studies and animal models to further confirm the role of ADE in the development of congenital and neurological complications associated with Zika virus infections...
December 29, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28008958/zika-virus-infection-induces-mitosis-abnormalities-and-apoptotic-cell-death-of-human-neural-progenitor-cells
#4
Bruno S F Souza, Gabriela L A Sampaio, Ciro S Pereira, Gubio S Campos, Silvia I Sardi, Luiz A R Freitas, Claudio P Figueira, Bruno D Paredes, Carolina K V Nonaka, Carine M Azevedo, Vinicius P C Rocha, Antonio C Bandeira, Rosalia Mendez-Otero, Ricardo Ribeiro Dos Santos, Milena B P Soares
Zika virus (ZIKV) infection has been associated with severe complications both in the developing and adult nervous system. To investigate the deleterious effects of ZIKV infection, we used human neural progenitor cells (NPC), derived from induced pluripotent stem cells (iPSC). We found that NPC are highly susceptible to ZIKV and the infection results in cell death. ZIKV infection led to a marked reduction in cell proliferation, ultrastructural alterations and induction of autophagy. Induction of apoptosis of Sox2(+) cells was demonstrated by activation of caspases 3/7, 8 and 9, and by ultrastructural and flow cytometry analyses...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28002820/zika-virus-infection-in-the-elderly-possible-relationship-with-guillain-barr%C3%A3-syndrome
#5
Wilson Savino, Carolina V Messias, Daniella A Mendes-da-Cruz, Pamela Passos, Ana Carolina A F Ferreira, Osvaldo J Nascimento
The Zika virus (ZIKV) outbreak in French Polynesia, in 2013, and in Brazil, in 2015, was correlated with neurological complications, which comprised, among others, congenital microcephaly and Guillain-Barré syndrome (GBS), which includes a group of acute autoimmune neuropathies generally reported after respiratory or gastrointestinal infectious diseases. Despite being relatively rare, the incidence rate of GBS rises with age, which makes GBS more frequent in the elderly, in whom it is also a more severe disease with slower recovery than in younger patients...
December 22, 2016: Gerontology
https://www.readbyqxmd.com/read/27991555/simple-reverse-genetics-systems-for-asian-and-african-zika-viruses
#6
Thérèse Atieh, Cécile Baronti, Xavier de Lamballerie, Antoine Nougairède
Zika virus (ZIKV), a typical example of a re-emerging pathogen, recently caused large outbreaks in Pacific islands and the Americas, associated with congenital diseases and neurological complications. Deciphering the natural history, ecology and pathophysiology of this mosquito-borne pathogen requires effective reverse genetics tools. In the current study, using the bacterium-free 'Infectious Subgenomic Amplicons' (ISA) method, we generated and made available to the scientific community via the non-profit European Virus Archive collection, two simple and performing reverse genetics systems for ZIKV...
December 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27974667/molecular-determinants-of-human-neutralizing-antibodies-isolated-from-a-patient-infected-with-zika-virus
#7
Qihui Wang, Huabing Yang, Xiaoqing Liu, Lianpan Dai, Tong Ma, Jianxun Qi, Gary Wong, Ruchao Peng, Sheng Liu, Junfu Li, Shihua Li, Jian Song, Jianying Liu, Jianhua He, Hui Yuan, Ying Xiong, Yong Liao, Jianhua Li, Jianping Yang, Zhou Tong, Bryan D Griffin, Yuhai Bi, Mifang Liang, Xiaoning Xu, Chuan Qin, Gong Cheng, Xinzheng Zhang, Peiyi Wang, Xiangguo Qiu, Gary Kobinger, Yi Shi, Jinghua Yan, George F Gao
The 2015-2016 outbreak of Zika virus (ZIKV) disease has affected many countries and is a major public health concern. ZIKV is associated with fetal microcephaly and neurological complications, and countermeasures are needed to treat and prevent ZIKV infection. We report the isolation of 13 specific human monoclonal antibodies from a single patient infected with ZIKV. Two of the isolated antibodies (Z23 and Z3L1) demonstrated potent ZIKV-specific neutralization in vitro without binding or neutralizing activity against strains 1 to 4 of dengue virus, the closest relative to ZIKV...
December 14, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27966802/zika-virus-a-new-threat-to-human-reproduction
#8
REVIEW
David Baud, Didier Musso, Manon Vouga, Marco P Alves, Nicolas Vulliemoz
Zika virus (ZIKV) was first isolated in 1947 in a rhesus monkey from the Zika forest of Uganda. Until 2007, only 14 human cases were reported. The first large human outbreak occurred in 2007 (Yap Island, Federated States of Micronesia, Pacific) followed by French Polynesia in 2013 and Brazil in 2015. The virus is mainly transmitted through Aedes mosquito bites, but sexual and post-transfusion transmissions have been reported. Symptoms include low-grade fever, maculopapular rash, conjunctivitis, myalgia, arthralgia, and asthenia...
December 14, 2016: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/27940942/transient-myocarditis-associated-with-acute-zika-virus-infection
#9
M Aletti, S Lecoules, V Kanczuga, C Soler, M Maquart, F Simon, I Leparc-Goffart
Zika virus outbreak is spreading in America. This emerging infection is associated with neurological complication. We report the first travel-acquired Zika acute infection complicated with myocarditis imported in Mainland France. We recommand an electrocardiogram and an troponin if any cardiac symptoms are present in a patient with acute Zika infection.
December 10, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27934901/towards-peptide-vaccines-against-zika-virus-immunoinformatics-combined-with-molecular-dynamics-simulations-to-predict-antigenic-epitopes-of-zika-viral-proteins
#10
Muhammad Usman Mirza, Shazia Rafique, Amjad Ali, Mobeen Munir, Nazia Ikram, Abdul Manan, Outi M H Salo-Ahen, Muhammad Idrees
The recent outbreak of Zika virus (ZIKV) infection in Brazil has developed to a global health concern due to its likely association with birth defects (primary microcephaly) and neurological complications. Consequently, there is an urgent need to develop a vaccine to prevent or a medicine to treat the infection. In this study, immunoinformatics approach was employed to predict antigenic epitopes of Zika viral proteins to aid in development of a peptide vaccine against ZIKV. Both linear and conformational B-cell epitopes as well as cytotoxic T-lymphocyte (CTL) epitopes were predicted for ZIKV Envelope (E), NS3 and NS5 proteins...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27934884/rapid-affordable-and-portable-medium-throughput-molecular-device-for-zika-virus
#11
Kamfai Chan, Scott C Weaver, Pui-Yan Wong, Sherly Lie, Eryu Wang, Mathilde Guerbois, Siva Praneeth Vayugundla, Season Wong
Zika virus (ZIKV) has gained global attention as an etiologic agent of fetal microcephaly and Guillain-Barré syndrome. Existing immuno-based rapid tests often fail to distinguish between Zika and related flaviviruses that are common in affected regions of Central and South Americas and the Caribbean. The US CDC and qualified state health department laboratories can perform the reverse transcription polymerase chain reaction (RT-PCR) ZIKV test using highly sophisticated instruments with long turnaround times...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27911897/heterologous-protection-against-asian-zika-virus-challenge-in-rhesus-macaques
#12
Matthew T Aliota, Dawn M Dudley, Christina M Newman, Emma L Mohr, Dane D Gellerup, Meghan E Breitbach, Connor R Buechler, Mustafa N Rasheed, Mariel S Mohns, Andrea M Weiler, Gabrielle L Barry, Kim L Weisgrau, Josh A Eudailey, Eva G Rakasz, Logan J Vosler, Jennifer Post, Saverio Capuano, Thaddeus G Golos, Sallie R Permar, Jorge E Osorio, Thomas C Friedrich, Shelby L O'Connor, David H O'Connor
BACKGROUND: Zika virus (ZIKV; Flaviviridae, Flavivirus) was declared a public health emergency of international concern by the World Health Organization (WHO) in February 2016, because of the evidence linking infection with ZIKV to neurological complications, such as Guillain-Barre Syndrome in adults and congenital birth defects including microcephaly in the developing fetus. Because development of a ZIKV vaccine is a top research priority and because the genetic and antigenic variability of many RNA viruses limits the effectiveness of vaccines, assessing whether immunity elicited against one ZIKV strain is sufficient to confer broad protection against all ZIKV strains is critical...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27909576/zika-antiviral-chemotherapy-identification-of-drugs-and-promising-starting-points-for-drug-discovery-from-an-fda-approved-library
#13
Bruno S Pascoalino, Gilles Courtemanche, Marli T Cordeiro, Laura H V G Gil, Lucio Freitas-Junior
Background The recent epidemics of Zika virus (ZIKV) implicated it as the cause of serious and potentially lethal congenital conditions such microcephaly and other central nervous system defects, as well as the development of the Guillain-Barré syndrome in otherwise healthy patients. Recent findings showed that anti-Dengue antibodies are capable of amplifying ZIKV infection by a mechanism similar to antibody-dependent enhancement, increasing the severity of the disease. This scenario becomes potentially catastrophic when the global burden of Dengue and the advent of the newly approved anti-Dengue vaccines in the near future are taken into account...
2016: F1000Research
https://www.readbyqxmd.com/read/27901259/neurological-manifestations-of-chikungunya-and-zika-infections
#14
Talys J Pinheiro, Luis F Guimarães, Marcus Tulius T Silva, Cristiane N Soares
The epidemics of Chikungunya virus (CHIKV) and Zika virus (ZIKV) infections have been considered the most important epidemiological occurrences in the Americas. The clinical picture of CHIKV infection is characterized by high fever, exanthema, myalgia, headaches, and arthralgia. Besides the typical clinical picture of CHIKV, atypical manifestations of neurological complications have been reported: meningo-encephalitis, meningoencephalo-myeloradiculitis, myeloradiculitis, myelitis, myeloneuropathy, Guillain-Barré syndrome and others...
November 2016: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/27893080/travel-associated-zika-virus-disease-acquired-in-the-americas-through-february-2016-a-geosentinel-analysis
#15
Davidson H Hamer, Kira A Barbre, Lin H Chen, Martin P Grobusch, Patricia Schlagenhauf, Abraham Goorhuis, Perry J J van Genderen, Israel Molina, Hilmir Asgeirsson, Phyllis E Kozarsky, Eric Caumes, Stefan H Hagmann, Frank P Mockenhaupt, Gilles Eperon, Elizabeth D Barnett, Emmanuel Bottieau, Andrea K Boggild, Philippe Gautret, Noreen A Hynes, Susan Kuhn, R Ryan Lash, Karin Leder, Michael Libman, Denis J M Malvy, Cecilia Perret, Camilla Rothe, Eli Schwartz, Annelies Wilder-Smith, Martin S Cetron, Douglas H Esposito
Background: Zika virus has spread rapidly in the Americas and has been imported into many nonendemic countries by travelers. Objective: To describe clinical manifestations and epidemiology of Zika virus disease in travelers exposed in the Americas. Design: Descriptive, using GeoSentinel records. Setting: 63 travel and tropical medicine clinics in 30 countries. Patients: Ill returned travelers with a confirmed, probable, or clinically suspected diagnosis of Zika virus disease seen between January 2013 and 29 February 2016...
January 17, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/27892990/zika-virus-what-the-otolaryngologist-should-know-a-review
#16
Demetri Arnaoutakis, Tapan Padhya
Importance: Initially discovered in 1947, Zika virus infection received little notoriety as a tropical disease until 2015 when an outbreak of microcephaly cases was reported in Brazil. Zika is a single-stranded RNA arbovirus of the Flaviviridae family. The primary source of infection in humans stems from Aedes aegypti mosquito bites but can also occur through sexual, blood, and perinatal transmission. With expectations that 3 to 4 million people across the Americas will be infected over the next year, the World Health Organization has declared this event a Public Health Emergency of International Concern...
November 17, 2016: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/27884655/zika-virus-infection-in-dexamethasone-immunosuppressed-mice-demonstrating-disseminated-infection-with-multi-organ-involvement-including-orchitis-effectively-treated-by-recombinant-type-i-interferons
#17
Jasper Fuk-Woo Chan, Anna Jinxia Zhang, Chris Chung-Sing Chan, Cyril Chik-Yan Yip, Winger Wing-Nga Mak, Houshun Zhu, Vincent Kwok-Man Poon, Kah-Meng Tee, Zheng Zhu, Jian-Piao Cai, Jessica Oi-Ling Tsang, Kenn Ka-Heng Chik, Feifei Yin, Kwok-Hung Chan, Kin-Hang Kok, Dong-Yan Jin, Rex Kwok-Him Au-Yeung, Kwok-Yung Yuen
BACKGROUND: Disseminated or fatal Zika virus (ZIKV) infections were reported in immunosuppressed patients. Existing interferon-signaling/receptor-deficient mouse models may not be suitable for evaluating treatment effects of recombinant interferons. METHODS: We developed a novel mouse model for ZIKV infection by immunosuppressing BALB/c mice with dexamethasone. RESULTS: Dexamethasone-immunosuppressed male mice (6-8weeks) developed disseminated infection as evidenced by the detection of ZIKV-NS1 protein expression and high viral loads in multiple organs...
December 2016: EBioMedicine
https://www.readbyqxmd.com/read/27878100/neurological-manifestations-of-zika-virus-infection
#18
REVIEW
Ana-Belén Blázquez, Juan-Carlos Saiz
Zika virus (ZIKV) is a flavivirus (Flaviviridae family) transmitted mainly by Aedes mosquitoes. The virus was restricted to the African continent until its spread to south-east Asia in the 1980's, the Micronesia in 2007, the French Polynesia in 2013 and, more recently in the Americas in 2015, where, up to date, the World Health Organization (WHO) has estimated about 3-4 million total cases of ZIKV infection. During outbreaks in the French Polynesia and Brazil in 2013 and 2015, respectively, national health authorities reported potential neurological complications of ZIKV disease, chiefly an upsurge in Guillain-Barré syndrome, which coincided with ZIKV outbreaks...
November 12, 2016: World Journal of Virology
https://www.readbyqxmd.com/read/27872736/zika-virus-a-review-from-the-virus-basics-to-proposed-management-strategies
#19
REVIEW
Lorenzo Zammarchi, Michele Spinicci, Alessandro Bartoloni
This review aims to summarize the body of knowledge available on Zika virus to date. A comprehensive review of the scientific literature on Zika virus was performed with the aim to stress relevant aspects for healthcare professionals in the non-endemic areas. For several years, the Zika virus infection was considered an extremely rare exotic disease with poor clinical relevance. However, Zika virus has recently gained the attention of the scientific community and public opinion since the virus spread to the Pacific islands and the South America in an unprecedented epidemic, and additionally due to the definitive evidence that the infection could be complicated by Guillain-Barré syndrome, passed through vertical transmission, and result in central nervous system abnormalities (including microcephaly) of the fetus...
2016: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/27870689/zika-virus-and-diagnostics
#20
Claudia Raja Gabaglia
PURPOSE OF REVIEW: The purpose of this review is to present what is known about the Zika virus (ZIKV) at the time of writing this review. The viral structure and its phylogeny, as well as the limitations of current available techniques used for diagnosis, are discussed. RECENT FINDINGS: Crystallography and cryo-electron microscopy of the whole ZIKV, or a few of its proteins, are confirming its overall antigenic relatedness to other flaviviruses. Sequencing has revealed its dynamic genetic variation and has placed the Western cluster of Zika isolates within the Asian phylogenic tree...
November 18, 2016: Current Opinion in Pediatrics
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