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https://www.readbyqxmd.com/read/28811170/zika-virus-research-models
#1
REVIEW
Jessica L Kublin, James B Whitney
The 2015 Brazilian Zika virus outbreak sparked a rapid response to control the spread of the virus. What was first understood to be a mild self-resolving infection is now linked to significant neurological defects in both neonates, and adults. The WHO declared the 2016 Zika epidemic a public health emergency and issued an unprecedented recommendation to women in affected regions to delay pregnancy until the risks surrounding Zika virus could be understood, or the epidemic contained. Since that time, considerable effort has been dedicated to understanding Zika transmission and pathogenesis to aid the development of drugs and vaccines...
August 12, 2017: Virus Research
https://www.readbyqxmd.com/read/28810265/viral-retinopathy-in-experimental-models-of-zika-infection
#2
Zhenyang Zhao, Matthew Yang, Sasha R Azar, Lynn Soong, Scott C Weaver, Jiaren Sun, Yan Chen, Shannan L Rossi, Jiyang Cai
Purpose: Emerging evidence has shown that both congenital and adult Zika virus (ZIKV) infection can cause eye diseases. The goals of the current study were to explore mechanisms and pathophysiology of ZIKV-induced eye defects. Methods: Wild-type or A129 interferon type I receptor-deficient mice were infected by either FSS13025 or Mex1-7 strain of ZIKV. Retinal histopathology was measured at different time points after infection. The presence of viral RNA and protein in the retina was determined by in situ hybridization and immunofluorescence staining, respectively...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28806618/public-sentiment-and-discourse-about-zika-virus-on-instagram
#3
E K Seltzer, E Horst-Martz, M Lu, R M Merchant
OBJECTIVE: Social media have strongly influenced the awareness and perceptions of public health emergencies, and a considerable amount of social media content is now shared through images, rather than text alone. This content can impact preparedness and response due to the popularity and real-time nature of social media platforms. We sought to explore how the image-sharing platform Instagram is used for information dissemination and conversation during the current Zika outbreak. STUDY DESIGN: This was a retrospective review of publicly posted images about Zika on Instagram...
August 11, 2017: Public Health
https://www.readbyqxmd.com/read/28806562/zika-virus-induced-neurological-critical-illness-in-latin-america-severe-guillain-barre-syndrome-and-encephalitis
#4
Sebastián U Ugarte, Angel Ricardo V Arenas, Bruno C Alvarez, Angela Cubides, Angélica F Luna, Max Arroyo-Parejo, Cayri E Acuña, Agamenón V Quintero, Orlando Ch Villareal, Oscar S Pinillos, Elías Vieda, Manuel Bello, Susana Peña, Carmelo Dueñas-Castell, Gloria M V Rodriguez, Jorge L M Ranero, Rosa L M López, Sandra G Olaya, José C Vergara, Ana Tandazo, Juan P S Ospina, Igor M Leyton Soto, R A Fowler, John C Marshall
Zika virus (ZIKAV) is classically described as causing minor symptoms in adult patients, however neurologic complications have been recognized. The recent outbreak in Central and South America has resulted in serious illness in some adult patients. We report adult patients in Latin America diagnosed with ZIKAV infection admitted to Intensive Care Units (ICUs). METHODS: Multicenter, prospective case series of adult patients with laboratory diagnosis of ZIKAV in 16 ICUs in 8 countries. RESULTS: Between December 1st 2015 and April 2nd 2016, 16 ICUs in 8 countries enrolled 49 critically ill patients with diagnosis of ZIKAV infection...
August 9, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28804687/zika-virus-zikv-a-review-of-proposed-mechanisms-of-transmission-and-associated-congenital-abnormalities
#5
Sruti K Desai, Steven D Hartman, Shilpa Jayarajan, Stephanie Liu, G Ian Gallicano
Zika virus (ZIKV) has been of major international public health concern following large outbreaks in the Americas occurring in 2015-2016. Most notably, ZIKV has been seen to pose dangers in pregnancy due to its association with congenital abnormalities such as microcephaly. Numerous experimental approaches have been taken to address how the virus can cross the placenta, alter normal fetal development, and disrupt specific cellular functions. Many areas concerning the mechanisms of transmission, especially from mother to fetus, are largely unknown but demand further research...
2017: American Journal of Stem Cells
https://www.readbyqxmd.com/read/28803932/the-thiopurine-nucleoside-analogue-6-methylmercaptopurine-riboside-6mmpr-effectively-blocks-zika-virus-replication
#6
Otavio Valério de Carvalho, Daniele Mendes Félix, Leila Rodrigues de Mendonça, Catarina Maria Cataldi Sabino de Araújo, Rafael Freitas de Oliveira Franca, Marli Tenório Cordeiro, Abelardo Silva Júnior, Lindomar José Pena
Since the emergence of Zika virus (ZIKV) in Brazil in 2015, 48 countries and territories in the Americas have confirmed autochthonous cases of the disease caused by the virus. The ZIKV-associated neurological manifestations and congenital defects make the development of safe and effective antivirals against ZIKV of utmost importance. Here, we evaluated the antiviral activity of 6-methylmercaptopurine riboside (6MMPr), a thiopurine nucleoside analog derived from the prodrug azathioprine (AZA), against the epidemic ZIKV strain circulating in Brazil...
August 10, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28798738/zika-virus-an-emerging-worldwide-threat
#7
Irfan A Rather, Jameel B Lone, Vivek K Bajpai, Woon K Paek, Jeongheui Lim
ZIKA virus (ZIKV) poses a severe threat to the world. Recent outbreaks of ZIKV after 2007 along with its quick transmission have made this virus a matter of international concern. The virus shows symptoms that are similar to those caused in the wake of dengue virus (DENV) and other flaviviruses, which makes it difficult to discern the viral infection. Diagnosis is further complicated as the virus cross-reacts with antibodies of other viruses. Currently, molecular diagnosis of the virus is being performed by RT-PCR and IgM-captured enzyme-linked immunosorbent assay (MAC-ELISA)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28795959/zika-virus-and-the-eye
#8
Bruno de Paula Freitas, Camila V Ventura, Mauricio Maia, Rubens Belfort
PURPOSE OF REVIEW: The aim of this study was to review the ocular findings related to the Zika virus (ZIKV) based on the main studies published to date, describe the patterns of the lesions and risk factors, and identify the public health implications and scientific importance of this emerging disease. RECENT FINDINGS: In most studies, the ZIKV seems related to congenital ocular lesions and most mothers reported mild symptoms during the first pregnancy trimester...
August 8, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28795266/whole-genome-sequence-analysis-of-zika-virus-amplified-from-urine-of-traveler-from-the-philippines
#9
Se Hun Gu, Dong Hyun Song, Daesang Lee, Jeyoun Jang, Min Young Kim, Jaehun Jung, Koung In Woo, Mirang Kim, Woong Seog, Hong Sang Oh, Byung Seop Choi, Jong-Seong Ahn, Quehn Park, Seong Tae Jeong
Zika virus (ZIKV) (genus Flavivirus, family Flaviviridae) is an emerging pathogen associated with microcephaly and Guillain-Barré syndrome. The rapid spread of ZIKV disease in over 60 countries and the large numbers of travel-associated cases have caused worldwide concern. Thus, intensified surveillance of cases among immigrants and tourists from ZIKV-endemic areas is important for disease control and prevention. In this study, using Next Generation Sequencing, we reported the first whole-genome sequence of ZIKV strain AFMC-U, amplified from the urine of a traveler returning to Korea from the Philippines...
August 9, 2017: Virus Genes
https://www.readbyqxmd.com/read/28794019/development-of-virus-like-particle-vaccine-and-reporter-assay-for-zika-virus
#10
Himanshu Garg, Melina Sedano, Gabrielle Plata, Erin B Punke, Anjali Joshi
Recent worldwide outbreaks of Zika virus (ZIKV) infection and the lack of an approved vaccine raises serious concerns regarding preparedness to combat this emerging virus. We used a Virus Like Particle (VLP) based approach to develop a vaccine and a microneutralization assay against ZIKV. Synthetic C-prM-E (Capsid-preMembrane-Envelope) gene construct of ZIKV was used to generate Reporter Virus Particles (RVPs) that package GFP reporter expressing WNV replicon. The assay was adapted to 96 well format, similar to the Plaque Reduction Neutralization Test (PRNT) and showed high reproducibility with specific detection of ZIKV neutralizing antibodies...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28792064/evidence-of-increasing-diversification-of-zika-virus-strains-isolated-in-the-american-continent
#11
Fabián Aldunate, Fabiana Gámbaro, Alvaro Fajardo, Martín Soñora, Juan Cristina
Zika virus (ZIKV) is a member of the family Flaviviridae. ZIKV emerged in Brazil in 2015, causing an unprecedented epidemic and since then the virus has rapidly spread throughout the Americas. These facts highlight the need of detailed phylogenetic studies to understand the emergence, spread and evolution of ZIKV populations. For these reasons, a Bayesian coalescent Markov Chain Monte Carlo analysis of complete genome sequences of ZIKV strains recently isolated in the American continent was performed. The results of these studies revealed an increasing diversification of ZIKV strains in different genetic lineages and co-circulation of distinct genetic lineages in several countries in the region...
August 9, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28790185/asymmetric-percolation-drives-a-double-transition-in-sexual-contact-networks
#12
Antoine Allard, Benjamin M Althouse, Samuel V Scarpino, Laurent Hébert-Dufresne
Zika virus (ZIKV) exhibits unique transmission dynamics in that it is concurrently spread by a mosquito vector and through sexual contact. Due to the highly asymmetric durations of infectiousness between males and females-it is estimated that males are infectious for periods up to 10 times longer than females-we show that this sexual component of ZIKV transmission behaves akin to an asymmetric percolation process on the network of sexual contacts. We exactly solve the properties of this asymmetric percolation on random sexual contact networks and show that this process exhibits two epidemic transitions corresponding to a core-periphery structure...
August 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28783051/microcephaly-prevalence-in-infants-born-to-zika-virus-infected-women-a-systematic-review-and-meta-analysis
#13
REVIEW
Antonio Victor Campos Coelho, Sergio Crovella
Zika virus is an emergent flavivirus transmitted by Aedes genus mosquitoes that recently reached the Americas and was soon implicated in an increase of microcephaly incidence. The objective of the present study is to systematically review the published data and perform a meta-analysis to estimate the prevalence of microcephaly in babies born to Zika virus-infected women during pregnancy. We searched PubMed and Cochrane databases, included cohort studies, and excluded case reports and case series publications...
August 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28776338/epidemiology-and-clinical-characteristics-of-zika-virus-infections-imported-into-korea-from-march-to-october-2016
#14
Doran Yoon, Seung Hwan Shin, Hee Chang Jang, Eu Suk Kim, Eun Hee Song, Song Mi Moon, So Youn Shin, Pyeong Gyun Choe, Jung Joon Sung, Eun Hwa Choi, Myoung Don Oh, Youngmee Jee, Nam Joong Kim
Zika is a re-emerging, mosquito-borne viral infection, which has been recently shown to cause microcephaly and Guillain-Barré syndrome. Since 2015 the number of infected patients has increased significantly in South America. The purpose of this study was to identify the epidemiologic and clinical characteristics of patients with Zika virus (ZIKV) infections in Korea. Patients who had visited areas of risk and tested positive in the ZIKV reverse transcriptase polymerase chain reaction (RT-PCR) in blood, urine, or saliva specimens were included...
September 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28772262/evolution-and-emergence-of-pathogenic-viruses-past-present-and-future
#15
Mohammad K Parvez, Shama Parveen
Incidences of emerging/re-emerging deadly viral infections have significantly affected human health despite extraordinary progress in the area of biomedical knowledge. The best examples are the recurring outbreaks of dengue and chikungunya fever in tropical and sub-tropical regions, the recent epidemic of Zika in the Americas and the Caribbean, and the SARS, MERS, and influenza A outbreaks across the globe. The established natural reservoirs of human viruses are mainly farm animals, and, to a lesser extent, wild animals and arthropods...
August 4, 2017: Intervirology
https://www.readbyqxmd.com/read/28769893/imported-zika-virus-in-a-european-city-how-to-prevent-local-transmission
#16
Joan-Pau Millet, Tomàs Montalvo, Ruben Bueno-Marí, Arancha Romero-Tamarit, Albert Prats-Uribe, Lidia Fernández, Esteve Camprubí, Lucía Del Baño, Victor Peracho, Jordi Figuerola, Elena Sulleiro, Miguel J Martínez, Joan A Caylà
Background: On February 1st 2016 the WHO declared the Zika Virus (ZIKV) infection a worldwide public health emergency because of its rapid expansion and severe complications, such as Guillain-Barré Syndrome or microcephaly in newborn. The huge amount of people traveling to endemic areas and the presence of Aedes albopictus in Barcelona increase the risk of autochtonous transmission. The objective of this study was to describe the first ZIKV cases diagnosed in our city and to analyze the surveillance, prevention, and control measures implemented to avoid autochthonous transmission...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28768434/metabolic-reprogramming-during-hepatitis-b-disease-progression-offers-novel-diagnostic-and-therapeutic-opportunities
#17
REVIEW
Jesse Jr Masson, Hugh Ww Billings, Clovis S Palmer
Metabolic remodeling occurs in immune cells during an infection. Host cells must upregulate energy production for growth, proliferation, and effector functions to limit the damage imposed by pathogens. One example, the hepatitis B virus, induces hepatic injury in human hepatocytes through dysregulation of aerobic glycolysis and lipid metabolism. Increased glycolytic metabolism mediated by elevated expression of Glut1, glucose influx, and lactate secretion is associated with this Warburg phenotype, a classic metabolic signature also observed in cancer cells...
August 2017: Antiviral Chemistry & Chemotherapy
https://www.readbyqxmd.com/read/28755567/microcephaly-and-zika-virus-neuroradiological-aspects-clinical-findings-and-a-proposed-framework-for-early-evaluation-of-child-development
#18
Nelci Adriana Cicuto Ferreira Rocha, Ana Carolina de Campos, Fellipe Cicuto Ferreira Rocha, Fernanda Pereira Dos Santos Silva
BACKGROUND AND AIMS: As the recent outbreak of microcephaly cases caused by Zika virus has been declared a global health emergency, providing assessment guidelines for multidisciplinary teams providing early developmental screening and stimulation to infants with microcephaly is much needed. Thus, the aim of this manuscript is to provide an overview on what is known about neuroradiological aspects and clinical findings in infants with microcephaly caused by Zika virus and to propose a framework for early evaluation of child development...
July 26, 2017: Infant Behavior & Development
https://www.readbyqxmd.com/read/28754189/progress-and-works-in-progress-update-on-flavivirus-vaccine-development
#19
REVIEW
Matthew H Collins, Stefan W Metz
Most areas of the globe are endemic for at least one flavivirus, putting billions at risk for infection. This diverse group of viral pathogens causes a range of manifestations in humans from asymptomatic infection to hemorrhagic fever to encephalitis to birth defects and even death. Many flaviviruses are transmitted by mosquitos and have expanded in geographic distribution in recent years, with dengue virus being the most prevalent, infecting approximately 400 million people each year. The explosive emergence of Zika virus in Latin America in 2014 refocused international attention on this medically important group of viruses...
July 25, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28750247/macaque-monkeys-in-zika-virus-research-1947-present
#20
REVIEW
Christina Newman, Thomas C Friedrich, David H O'Connor
Zika virus was first isolated in 1947 from an exotic rhesus macaque. Nearly 70 years later, the emergence of Zika virus in the Americas and its newly described association with birth defects has motivated the development of captive macaque monkey models of human Zika virus infection. This review describes similarities between macaque and human Zika virus pathogenesis and discusses specific advantages and disadvantages of using macaques instead of other laboratory animal models. In particular, macaques provide an outstanding model for understanding in utero Zika virus infections that are essential for evaluating preclinical interventions for use in pregnancy...
July 24, 2017: Current Opinion in Virology
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