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https://www.readbyqxmd.com/read/28203251/sulfated-glycans-and-related-digestive-enzymes-in-the-zika-virus-infectivity-potential-mechanisms-of-virus-host-interaction-and-perspectives-in-drug-discovery
#1
REVIEW
Vitor H Pomin
As broadly reported, there is an ongoing Zika virus (ZIKV) outbreak in countries of Latin America. Recent findings have demonstrated that ZIKV causes severe defects on the neural development in fetuses in utero and newborns. Very little is known about the molecular mechanisms involved in the ZIKV infectivity. Potential therapeutic agents are also under investigation. In this report, the possible mechanisms of action played by glycosaminoglycans (GAGs) displayed at the surface proteoglycans of host cells, and likely in charge of interactions with surface proteins of the ZIKV, are highlighted...
2017: Interdisciplinary Perspectives on Infectious Diseases
https://www.readbyqxmd.com/read/28182608/prevalence-and-clinical-attributes-of-congenital-microcephaly-new-york-2013-2015
#2
Krishika A Graham, Deborah J Fox, Achala Talati, Cristian Pantea, Laura Brady, Sondra L Carter, Eric Friedenberg, Neil M Vora, Marilyn L Browne, Christopher T Lee
Congenital Zika virus infection can cause microcephaly and other severe fetal neurological anomalies (1). To inform microcephaly surveillance efforts and assess ascertainment sources, the New York State Department of Health and the New York City Department of Health and Mental Hygiene sought to determine the prevalence of microcephaly in New York during 2013-2015, before known importation of Zika virus infections. Suspected newborn microcephaly diagnoses were identified from 1) reports submitted by birth hospitals in response to a request and 2) queries of a hospital administrative discharge database for newborn microcephaly diagnoses...
February 10, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28153732/zika-virus-induces-inflammasome-activation-in-the-glial-cell-line-u87-mg
#3
Paola Maura Tricarico, Ilaria Caracciolo, Sergio Crovella, Pierlanfranco D'Agaro
In the last years, neurological complications related to Zika virus (ZIKV) infection have emerged as an important threat to public health worldwide. ZIKV infection has been associated to neurological disorders such as congenital microcephaly in newborns and Guillain-Barré syndrome, myelopathy and encephalitis in adults. ZIKV is characterized by neurotropism and neurovirulence. Several studies have identified microglial nodules, gliosis, neuronal and glial cells degeneration and necrosis in the brain of ZIKV infected infants, suggesting that ZIKV could play a role in these neurological disorders through neuroinflammation and microglial activation...
January 30, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28153056/study-protocol-on-establishment-of-sentinel-sites-network-for-contraceptive-and-abortion-trends-needs-and-utilization-of-services-in-zika-virus-affected-countries
#4
Moazzam Ali, Kelsey Miller, Rachel Folz, Brooke Ronald Johnson, James Kiarie
BACKGROUND: ZIKV(Zika Virus) during pregnancy can result in many adverse events such as fetal deaths or newborns with congenital abnormalities including microcephaly and other neural irregularities. Due to these harmful outcomes of pregnancy associated with the Zika virus, we can expect to see a change in the type and scale of demand for family planning and safe abortion services in areas affected by the Zika virus. The monitoring and reporting capacities of the local health clinics in these areas could benefit from the introduction of infrastructural improvements necessary to establish a sentinel site network...
February 2, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28151488/zika-virus-protection-by-a-single-low-dose-nucleoside-modified-mrna-vaccination
#5
Norbert Pardi, Michael J Hogan, Rebecca S Pelc, Hiromi Muramatsu, Hanne Andersen, Christina R DeMaso, Kimberly A Dowd, Laura L Sutherland, Richard M Scearce, Robert Parks, Wendeline Wagner, Alex Granados, Jack Greenhouse, Michelle Walker, Elinor Willis, Jae-Sung Yu, Charles E McGee, Gregory D Sempowski, Barbara L Mui, Ying K Tam, Yan-Jang Huang, Dana Vanlandingham, Veronica M Holmes, Harikrishnan Balachandran, Sujata Sahu, Michelle Lifton, Stephen Higgs, Scott E Hensley, Thomas D Madden, Michael J Hope, Katalin Karikó, Sampa Santra, Barney S Graham, Mark G Lewis, Theodore C Pierson, Barton F Haynes, Drew Weissman
Zika virus (ZIKV) has recently emerged as an explosive pandemic associated with severe neuropathology in newborns and adults(1). There are no ZIKV-specific treatments or preventatives; thus, development of a safe and effective vaccine is a high priority. Messenger RNA (mRNA) has emerged as a versatile and highly effective platform to deliver vaccine antigens and therapeutic proteins(2,3). Here, we demonstrate that a single low-dose intradermal immunization with lipid nanoparticle-encapsulated nucleoside-modified mRNA (mRNA-LNP) encoding the pre-membrane and envelope (prM-E) glycoproteins of a 2013 ZIKV outbreak strain elicited potent and durable neutralizing antibody responses in mice and non-human primates...
February 2, 2017: Nature
https://www.readbyqxmd.com/read/28134669/prenatal-imaging-findings-in-fetal-zika-virus-infection
#6
Edward Araujo Júnior, Francisco H C Carvalho, Gabriele Tonni, Heron Werner
PURPOSE OF REVIEW: The aim of this review is to report the most recent observations concerning intrauterine Zika virus (ZIKV) infection and associated neuroimaging. RECENT FINDINGS: ZIKV outbreak in Brazil in 2015 was associated with an impressive registration of cases of congenital microcephaly in women with symptoms suggestive of ZIKV infection. Clinical and laboratory testing for ZIKV and hypothetic etiopathogenetic mechanisms are described. Diagnostic tests on blood, urine and amniotic fluid should be performed in all mothers with symptoms suggestive of intrauterine ZIKV infection...
January 27, 2017: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28132835/recent-zika-virus-isolates-induce-premature-differentiation-of-neural-progenitors-in-human-brain-organoids
#7
Elke Gabriel, Anand Ramani, Ulrike Karow, Marco Gottardo, Karthick Natarajan, Li Ming Gooi, Gladiola Goranci-Buzhala, Oleg Krut, Franziska Peters, Milos Nikolic, Suvi Kuivanen, Essi Korhonen, Teemu Smura, Olli Vapalahti, Argyris Papantonis, Jonas Schmidt-Chanasit, Maria Riparbelli, Giuliano Callaini, Martin Krönke, Olaf Utermöhlen, Jay Gopalakrishnan
The recent Zika virus (ZIKV) epidemic is associated with microcephaly in newborns. Although the connection between ZIKV and neurodevelopmental defects is widely recognized, the underlying mechanisms are poorly understood. Here we show that two recently isolated strains of ZIKV, an American strain from an infected fetal brain (FB-GWUH-2016) and a closely-related Asian strain (H/PF/2013), productively infect human iPSC-derived brain organoids. Both of these strains readily target to and replicate in proliferating ventricular zone (VZ) apical progenitors...
January 23, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28123079/zika-virus-targeting-in-the-developing-brain
#8
Anthony N van den Pol, Guochao Mao, Yang Yang, Sara Ornaghi, John N Davis
: Zika virus (ZIKV), a positive-sense RNA flavivirus, has attracted considerable attention recently for its potential to cause serious neurological problems including microcephaly, cortical thinning and blindness during early development. Recent findings suggest that ZIKV infection of the brain can occur not only during very early stages of development, but also in later fetal/early neonatal stages of maturation. Surprisingly, after peripheral inoculation of immunocompetent mice on the day of birth, the first cells targeted throughout the brain were isolated astrocytes...
January 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28120186/dengue-and-zika-viruses-lessons-learned-from-the-similarities-between-these-aedes-mosquito-vectored-arboviruses
#9
REVIEW
San Suwanmanee, Natthanej Luplertlop
The currently spreading arbovirus epidemic is having a severe impact on human health worldwide. The two most common flaviviruses, dengue virus (DENV) and Zika virus (ZIKV), are transmitted through the same viral vector, Aedes spp. mosquitoes. Since the discovery of DENV in 1943, this virus has been reported to cause around 390 million human infections per year, approximately 500,000 of which require hospitalization and over 20,000 of which are lethal. The present DENV epidemic is primarily concentrated in Southeast Asia...
February 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28099714/zika-virus-infection-in-brazil-and-human-rights-obligations
#10
Debora Diniz, Sinara Gumieri, Beatriz Galli Bevilacqua, Rebecca J Cook, Bernard M Dickens
The February 2016 WHO declaration that congenital Zika virus syndrome constitutes a Public Health Emergency of International Concern reacted to the outbreak of the syndrome in Brazil. Public health emergencies can justify a spectrum of human rights responses, but in Brazil, the emergency exposed prevailing inequities in the national healthcare system. The government's urging to contain the syndrome, which is associated with microcephaly among newborns, is confounded by lack of reproductive health services. Women with low incomes in particular have little access to such health services...
January 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28081529/zika-virus-induced-microcephaly-and-its-possible-molecular-mechanism
#11
Md Imam Faizan, Mohd Abdullah, Sher Ali, Irshad H Naqvi, Anwar Ahmed, Shama Parveen
Zika virus is an arthropod-borne re-emerging pathogen associated with the global pandemic of 2015-2016. The devastating effect of Zika viral infection is reflected by its neurological manifestations such as microcephaly in newborns. This scenario evoked our interest to uncover the neurotropic localization, multiplication of the virus, and the mechanism of microcephaly. The present report provides an overview of a possible molecular mechanism of Zika virus-induced microcephaly based on recent publications. Transplacental transmission of Zika viral infection from mother to foetus during the first trimester of pregnancy results in propagation of the virus in human neural progenitor cells (hNPCs), where entry is facilitated by the receptor (AXL protein) leading to the alteration of signalling and immune pathways in host cells...
January 13, 2017: Intervirology
https://www.readbyqxmd.com/read/28077143/pregnant-women-carrying-microcephaly-foetuses-and-zika-virus-contain-potentially-pathogenic-microbes-and-parasites-in-their-amniotic-fluid
#12
Diogo Antonio Tschoeke, Louisi Souza de Oliveira, Luciana Leomil, Amilcar Tanuri, Fabiano Lopes Thompson
BACKGROUND: Microcephaly has become a major public health problem in Brazil. The total number of newborns with microcephaly was reported to be >4000 in June 2016. Studies suggest that Zika Virus is a major cause of new microcephaly cases in Brazil. Inside the uterus, the foetus is surrounded by the Amniotic Fluid, a proximal fluid that contains foetal and maternal cells as well as microorganisms and where Zika Virus was already found. CASE PRESENTATION: A previous study reported the presence of the Zika Virus in the amniotic fluid (collected in the 28th gestational week) of two pregnant women carrying microcephaly foetuses in Brazil...
January 11, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/28060137/infants-with-congenital-zika-syndrome-and-ocular-findings-from-s%C3%A3-o-paulo-brazil-spread-of-infection
#13
João Rafael de Oliveira Dias, Camila V Ventura, Paula Delegrego Borba, Bruno de Paula Freitas, Ligia Camera Pierroti, Ana Patricia do Nascimento, Nilva Simeren Bueno de Moraes, Maurício Maia, Rubens Belfort
BACKGROUND/PURPOSE: To describe the ocular findings of two infants with congenital Zika syndrome born in São Paulo state, Brazil, outside the primary outbreak region. METHODS: Two female infants with congenital Zika syndrome were submitted to a complete screening for infectious diseases, as well as ocular examination, fundus photography, and optical coherence tomography of the retina. One of the infants was submitted to ocular ultrasound. RESULTS: Both children showed positive serology for Zika virus, and other infectious diseases were ruled out...
January 2, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28051181/the-larvicide-pyriproxyfen-blamed-during-the-zika-virus-outbreak-does-not-cause-microcephaly-in-zebrafish-embryos
#14
Stefania Dzieciolowska, Anne-Laure Larroque, Elizabeth-Ann Kranjec, Pierre Drapeau, Eric Samarut
Although the zika virus (ZIKV) has now been strongly correlated with emerging cases of microcephaly in the Americas, suspicions have been raised regarding the use of pyriproxyfen, a larvicide that prevents mosquito development, in drinking water. The effects of this compound on neurodevelopment have not yet been addressed specifically in vertebrates. As a result, we aimed at addressing the effects, if any, of pyriproxyfen on neurodevelopment in the zebrafish embryo as a vertebrate model. Using zebrafish transgenic lines expressing GFP in different cell populations (elavl3 in newborn neurons, gfap and nestin in neural stem cells), we focused on the analysis of whole embryonic brain volume after confocal 3D-reconstruction and the quantification of purified neural stem cells during early neurodevelopment by FACS-cell sorting from whole in vivo embryos...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28034744/extended-substrate-specificity-and-first-potent-irreversible-inhibitor-activity-based-probe-design-for-zika-virus-ns2b-ns3-protease
#15
Wioletta Rut, Linlin Zhang, Paulina Kasperkiewicz, Marcin Poreba, Rolf Hilgenfeld, Marcin Drąg
Zika virus is spread by Aedes mosquitoes and is linked to acute neurological disorders, especially to microcephaly in newborn children and Guillan-Barré Syndrome. The NS2B-NS3 protease of this virus is responsible for polyprotein processing and therefore considered an attractive drug target. In this study, we have used the Hybrid Combinatorial Substrate Library (HyCoSuL) approach to determine the substrate specificity of ZIKV NS2B-NS3 protease in the P4-P1 positions using natural and a large spectrum of unnatural amino acids...
December 26, 2016: Antiviral Research
https://www.readbyqxmd.com/read/28032327/emerging-zika-virus-infection-a-rapidly-evolving-situation
#16
Bordi Licia, Avsic-Zupanc Tatjana, Lalle Eleonora, Vairo Francesco, Capobianchi Maria Rosaria, Pedro Fernando da Costa Vasconcelos
Zika virus is a mosquito-borne flavivirus, firstly identified in Uganda and responsible for sporadic human cases in Africa and Asia until recently, when large outbreak occurred in Pacific Ocean and the Americas. Since the main vectors during its spread outside of Africa have been Ae. albopictus and Ae. aegypti mosquitoes, which are widely distributed all over the world, there is urgent need for a coordinated response for prevention and spread of ZIKV epidemics.Despite clinical manifestation of Zika virus infection are usually mild and self limiting, there are reports suggesting, during the recent epidemic, an association of ZIKV infection with severe consequences, including fetal/newborn microcephaly, due to vertical in utero transmission, autoimmune-neurological presentations including cranial nerve dysfunction, and Guillain-Barré Syndrome in adults...
December 29, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28031359/the-zika-virus-methyltransferase-structure-and-functions-for-drug-design-perspectives
#17
Bruno Coutard, Karine Barral, Julie Lichière, Barbara Selisko, Baptiste Martin, Wahiba Aouadi, Miguel Ortiz Lombardia, Françoise Debart, Jean-Jacques Vasseur, Jean Claude Guillemot, Bruno Canard, Etienne Decroly
: The Flavivirus Zika virus (ZIKV) is the causing agent of neurological disorders like microcephaly in newborns or Guillain-Barre syndrome. Its NS5 protein embeds a methyltransferase (MTase) domain involved in the formation of the viral mRNA cap. We investigated the structural and functional properties of the ZIKV MTase. We show that the ZIKV MTase can methylate RNA cap structures at the N7 position of the cap, and at the 2' O position on the ribose of the first nucleotide, yielding a cap-1 structure...
December 28, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27930910/the-neurobiology-of-zika-virus
#18
REVIEW
Hongda Li, Laura Saucedo-Cuevas, Sujan Shresta, Joseph G Gleeson
Zika virus (ZIVK) represents a new threat to global health, with particular relevance to neuroscientists, due to associated newborn and adult neurological disease. Consequences of vertical infection include microcephaly with brain and eye anomalies, and consequences of adult infection include Guillain-Barré syndrome (GBS) and meningoencephalitis. Recent data suggest specific vulnerability of neural progenitors to infection, leading to cell death and brain calcification, reminiscent of other viral syndromes...
December 7, 2016: Neuron
https://www.readbyqxmd.com/read/27912090/advances-in-zika-virus-research-stem-cell-models-challenges-and-opportunities
#19
REVIEW
Guo-Li Ming, Hengli Tang, Hongjun Song
The re-emergence of Zika virus (ZIKV) and its suspected link with various disorders in newborns and adults led the World Health Organization to declare a global health emergency. In response, the stem cell field quickly established platforms for modeling ZIKV exposure using human pluripotent stem cell-derived neural progenitors and brain organoids, fetal tissues, and animal models. These efforts provided significant insight into cellular targets, pathogenesis, and underlying biological mechanisms of ZIKV infection as well as platforms for drug testing...
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27899230/experimental-zika-virus-infection-induces-spinal-cord-injury-and-encephalitis-in-newborn-swiss-mice
#20
Natália C C A Fernandes, Juliana S Nogueira, Rodrigo A Réssio, Cinthya S Cirqueira, Lidia M Kimura, Karolina R Fernandes, Mariana S Cunha, Renato P Souza, Juliana M Guerra
A widespread epidemic of Zika virus (ZIKV) infection was reported in 2015 in South and Central America, with neurological symptons including meningoencephalitis and Guillain-Barré syndrome in adults, besides an apparent increased incidence of microcephaly in infants born to infected mothers. It is becoming a necessity to have a trustworthy animal model to better understand ZIKV infection. In this study we used newborn white Swiss mice as a model to investigate the ZIKV strain recently isolated in Brazil. ZIKV was inoculated via intracerebral and subcutaneous routes and analysed through gross histopathology and immunohistochemistry...
November 26, 2016: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
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