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https://www.readbyqxmd.com/read/28445832/study-of-the-mechanism-of-protonated-histidine-induced-conformational-changes-in-the-zika-virus-dimeric-envelope-protein-using-accelerated-molecular-dynamic-simulations
#1
Jixue Sun, Yang Li, Pi Liu, Jianping Lin
The Zika virus has drawn worldwide attention because of the epidemic diseases it causes. It is a flavivirus that has an icosahedral protein shell constituted by an envelope glycoprotein (E-protein) and membrane protein (M-protein) in the mature virion. The multistep process of membrane fusion to infect the host cell is pH-induced. To understand the mechanism of the conformational changes in the (E-M)2 protein homodimer embedded in the membrane, two 200-ns accelerated dynamic simulations were performed under different pH conditions...
April 13, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28445723/mosquitoes-transmit-unique-west-nile-virus-populations-during-each-feeding-episode
#2
Nathan D Grubaugh, Joseph R Fauver, Claudia Rückert, James Weger-Lucarelli, Selene Garcia-Luna, Reyes A Murrieta, Alex Gendernalik, Darci R Smith, Doug E Brackney, Gregory D Ebel
Arthropod-borne viruses (arboviruses), such as Zika virus, chikungunya virus, and West Nile virus (WNV), pose continuous threats to emerge and cause large epidemics. Often, these events are associated with novel virus variants optimized for local transmission that first arise as minorities within a host. Thus, the conditions that regulate the frequency of intrahost variants are important determinants of emergence. Here, we describe the dynamics of WNV genetic diversity during its transmission cycle. By temporally sampling saliva from individual mosquitoes, we demonstrate that virus populations expectorated by mosquitoes are highly diverse and unique to each feeding episode...
April 25, 2017: Cell Reports
https://www.readbyqxmd.com/read/28445704/development-of-standard-methods-for-zika-virus-propagation-titration-and-purification
#3
Sharton Vinicius Antunes Coelho, Rômulo Leão Silva Neris, Michelle Premazzi Papa, Laila Castro Schnellrath, Lana Monteiro Meuren, Diogo A Tschoeke, Luciana Leomil, Brunno Renato Farias Verçoza, Milene Miranda, Fabiano L Thompson, Andrea Thompson Da Poian, Thiago Moreno L Souza, Fabiana Avila Carneiro, Clarissa R Damaso, Iranaia Assunção-Miranda, Luciana Barros de Arruda
The emergence of Zika virus (ZIKV) infection has stimulated several research groups to study and collaborate to understand virus biology and pathogenesis. These efforts may assist with the development of antiviral drugs, vaccines and diagnostic tests, as well as to promote advancements in public health policies. Here, we aim to develop standard protocols for propagation, titration, and purification of Asian and Brazilian ZIKV strains, by systematically testing different cell types, kinetics, multiplicity of infection and centrifugation protocols...
April 23, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28445122/importation-of-zika-virus-from-vietnam-to-japan-november-2016
#4
Takehiro Hashimoto, Satoshi Kutsuna, Shigeru Tajima, Eri Nakayama, Takahiro Maeki, Satoshi Taniguchi, Chang-Kweng Lim, Yuichi Katanami, Nozomi Takeshita, Kayoko Hayakawa, Yasuyuki Kato, Norio Ohmagari
We report a case of Zika virus infection that was imported to Japan by a traveler returning from Vietnam. We detected Zika virus RNA in the patient's saliva, urine, and whole blood. In the Zika virus strain isolated from the urine, we found clearly smaller plaques than in previous strains.
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28444557/overview-on-the-current-status-of-zika-virus-pathogenesis-and-animal-related-research
#5
REVIEW
Shashank S Pawitwar, Supurna Dhar, Sneham Tiwari, Chet Raj Ojha, Jessica Lapierre, Kyle Martins, Alexandra Rodzinski, Tiyash Parira, Iru Paudel, Jiaojiao Li, Rajib Kumar Dutta, Monica R Silva, Ajeet Kaushik, Nazira El-Hage
There is growing evidence that Zika virus (ZIKV) infection is linked with activation of Guillan-Barré syndrome (GBS) in adults infected with the virus and microcephaly in infants following maternal infection. With the recent outpour in publications by numerous research labs, the association between microcephaly in newborns and ZIKV has become very apparent in which large numbers of viral particles were found in the central nervous tissue of an electively aborted microcephalic ZIKV-infected fetus. However, the underlying related mechanisms remain poorly understood...
April 25, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28444144/congenital-zika-virus-infection-induces-severe-spinal-cord-injury
#6
Fernando S Ramalho, Aparecida Y Yamamoto, Luis L da Silva, Luiz Tm Figueiredo, Lenaldo B Rocha, Luciano Neder, Sara R Teixeira, Letícia A Apolinário, Leandra Nz Ramalho, Deisy M Silva, Conrado M Coutinho, Patrícia P Melli, Marlei J Augusto, Ligia B Santoro, Geraldo Duarte, Marisa M Mussi-Pinhata
We reported two fatal cases of congenital Zika virus (ZIKV) infection. Brain anomalies including atrophy of the cerebral cortex and brainstem, and cerebellar aplasia were observed. The spinal cord showed architectural distortion, severe neuronal loss and microcalcifications. The ZIKV proteins and flavivirus-like particles were detected in cytoplasm of spinal neurons, and spinal cord samples were positive for the ZIKV RNA.
April 21, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28444003/species-abundance-and-temporal-variation-of-arbovirus-vectors-in-brownsville-texas
#7
Krithika Srinivasan, Beatriz Tapia, Arturo Rodriguez, Robert Wood, Jennifer J Salinas
The recent outbreaks of the dengue fever and West Nile viruses and the looming threats of the Zika and chikungunya viruses highlight the importance of establishing effective, proactive arboviral surveillance in communities at high risk of transmission, such as those on the Texas-Mexico border. Currently, there are no approved human vaccines available for these mosquito-borne diseases, so entomological control and case management are the only known methods for decreasing disease incidence. The principal vectors, which include Culex quinquefasciatus, Aedes aegypti, and Ae...
April 20, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28443985/zika-puzzle-in-brazil-peculiar-conditions-of-viral-introduction-and-dissemination-a-review
#8
Cristina Possas, Patricia Brasil, Mauro Ca Marzochi, Amilcar Tanuri, Reinaldo M Martins, Ernesto Ta Marques, Myrna C Bonaldo, Antonio Gp Ferreira, Ricardo Lourenço-de-Oliveira, Rita Maria R Nogueira, Patricia C Sequeira, Keyla Bf Marzochi, Akira Homma
This article discusses the peculiar conditions that favoured the unexpected introduction of Zika virus into the poorest northeastern region of Brazil in 2015, its speed of transmission to other Brazilian states, other Latin American countries and other regions, and the severity of related neurological disorders in newborns and adults. Contrasting with evidence that Zika had so far caused only mild cases in humans in the last six decades, the epidemiological scenario of this outbreak in Brazil indicates dramatic health effects: in 2015, an increase of 20-fold in notified cases of microcephaly and/or central nervous system (CNS) alterations suggestive of Zika congenital infection, followed by an exponential increase in 2016, with 2366 cumulative cases confirmed in the country by the end of December 2016...
May 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28442754/vector-competence-and-transovarial-transmission-of-two-aedes-aegypti-strains-to-zika-virus
#9
Chun-Xiao Li, Xiao-Xia Guo, Yong-Qiang Deng, Dan Xing, Ai-Juan Sun, Qin-Mei Liu, Qun Wu, Yan-de Dong, Ying-Mei Zhang, Heng-Duan Zhang, Wu-Chun Cao, Cheng-Feng Qin, Tong-Yan Zhao
Zika virus (ZIKV) has become a serious threat to global health since the outbreak in Brazil in 2015. Additional Chinese cases have continuously been reported since the first case of laboratory-confirmed ZIKV infection in China on 6 February 2016. Aedes aegypti is the most important vector for ZIKV. This study shows that two strains from China exhibit high levels of midgut infection and highly disseminated infection of salivary glands and ovaries. Both strains can transmit ZIKV to infant mice bitten by infectious mosquitoes...
April 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28442752/zika-virus-infection-reprograms-global-transcription-of-host-cells-to-allow-sustained-infection
#10
Shashi Kant Tiwari, Jason Dang, Yue Qin, Gianluigi Lichinchi, Vikas Bansal, Tariq M Rana
Zika virus (ZIKV) is an emerging virus causally linked to neurological disorders, including congenital microcephaly and Guillain-Barré syndrome. There are currently no targeted therapies for ZIKV infection. To identify novel antiviral targets and to elucidate the mechanisms by which ZIKV exploits the host cell machinery to support sustained replication, we analyzed the transcriptomic landscape of human microglia, fibroblast, embryonic kidney and monocyte-derived macrophage cell lines before and after ZIKV infection...
April 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28442607/n-methyl-d-aspartate-nmda-receptor-blockade-prevents-neuronal-death-induced-by-zika-virus-infection
#11
Vivian V Costa, Juliana L Del Sarto, Rebeca F Rocha, Flavia R Silva, Juliana G Doria, Isabella G Olmo, Rafael E Marques, Celso M Queiroz-Junior, Giselle Foureaux, Julia Maria S Araújo, Allysson Cramer, Ana Luíza C V Real, Lucas S Ribeiro, Silvia I Sardi, Anderson J Ferreira, Fabiana S Machado, Antônio C de Oliveira, Antônio L Teixeira, Helder I Nakaya, Danielle G Souza, Fabiola M Ribeiro, Mauro M Teixeira
Zika virus (ZIKV) infection is a global health emergency that causes significant neurodegeneration. Neurodegenerative processes may be exacerbated by N-methyl-d-aspartate receptor (NMDAR)-dependent neuronal excitoxicity. Here, we have exploited the hypothesis that ZIKV-induced neurodegeneration can be rescued by blocking NMDA overstimulation with memantine. Our results show that ZIKV actively replicates in primary neurons and that virus replication is directly associated with massive neuronal cell death. Interestingly, treatment with memantine or other NMDAR blockers, including dizocilpine (MK-801), agmatine sulfate, or ifenprodil, prevents neuronal death without interfering with the ability of ZIKV to replicate in these cells...
April 25, 2017: MBio
https://www.readbyqxmd.com/read/28442561/spread-of-zika-virus-in-the-americas
#12
Qian Zhang, Kaiyuan Sun, Matteo Chinazzi, Ana Pastore Y Piontti, Natalie E Dean, Diana Patricia Rojas, Stefano Merler, Dina Mistry, Piero Poletti, Luca Rossi, Margaret Bray, M Elizabeth Halloran, Ira M Longini, Alessandro Vespignani
We use a data-driven global stochastic epidemic model to analyze the spread of the Zika virus (ZIKV) in the Americas. The model has high spatial and temporal resolution and integrates real-world demographic, human mobility, socioeconomic, temperature, and vector density data. We estimate that the first introduction of ZIKV to Brazil likely occurred between August 2013 and April 2014 (90% credible interval). We provide simulated epidemic profiles of incident ZIKV infections for several countries in the Americas through February 2017...
April 25, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28442104/zika-virus-infection-and-its-emerging-trends-in-southeast-asia
#13
REVIEW
Ahmad Ruzain Salehuddin, Haszianaliza Haslan, Norshalizah Mamikutty, Nurul Hannim Zaidun, Mohamad Fairuz Azmi, Mohamad Mu'izuddin Senin, Syed Baharom Syed Ahmad Fuad, Zar Chi Thent
Zika virus is a mosquito-borne flavivirus that represents a public health emergency at the ongoing epidemic. Previously, this rare virus was limited to sporadic cases in Africa and Asia until its emergence in Brazil, South America in 2015, where it rapidly spread throughout the world. Recently, a high number of cases were reported in Singapore and other Southeast Asia countries. A combination of factors explains the current Zika virus outbreak although it is highly likely that the changes in the climate and high frequency of travelling contribute to the spread of Aedes vector carrying the Zika virus mainly to the tropical climate countries such as the Southeast Asia...
March 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28441781/dengue-virus-non-structural-protein-5
#14
REVIEW
Abbas El Sahili, Julien Lescar
The World Health Organization estimates that the yearly number of dengue cases averages 390 million. This mosquito-borne virus disease is endemic in over 100 countries and will probably continue spreading, given the observed trend in global warming. So far, there is no antiviral drug available against dengue, but a vaccine has been recently marketed. Dengue virus also serves as a prototype for the study of other pathogenic flaviviruses that are emerging, like West Nile virus and Zika virus. Upon viral entry into the host cell and fusion of the viral lipid membrane with the endosomal membrane, the viral RNA is released and expressed as a polyprotein, that is then matured into three structural and seven non-structural (NS) proteins...
April 24, 2017: Viruses
https://www.readbyqxmd.com/read/28441244/zika-virus-infection
#15
Beuy Joob, Viroj Wiwanitkit
No abstract text is available yet for this article.
April 24, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28437184/control-of-mosquito-borne-diseases-in-northwestern-italy-preparedness-from-one-season-to-the-next
#16
Federica Verna, Paola Modesto, Maria Cristina Radaelli, Danila Raffaella Francese, Enrico Monaci, Rosanna Desiato, Carla Grattarola, Simone Peletto, Andrea Mosca, Giovanni Savini, Rosa Chianese, Vittorio Demicheli, Marino Prearo, Laura Chiavacci, Alessandra Pautasso, Cristina Casalone
INTRODUCTION: Mosquito-borne diseases (MBDs) are spreading worldwide due to globalization and climate change, representing a threat for both humans and animals. Of great concern are the infections caused by viruses belonging to the Flavivirus genus as West Nile virus (WNV) and Usutu virus (USUV) transmitted by Culex sp. or Dengue virus and Zika virus (ZIKV), transmitted by Aedes sp. This work describes the surveillance protocol enforced in Piedmont (Northwestern Italy) to control MBDs spread, focusing on the activities performed on mosquitoes during the 2015 vector season...
May 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28437183/first-two-imported-cases-of-zika-virus-infections-in-romania
#17
Simin Aysel Florescu, Ani Ioana Cotar, Corneliu Petru Popescu, Cornelia Svetlana Ceianu, Mihaela Zaharia, Geta Vancea, Daniel Codreanu, Daniela Badescu, Emanoil Ceausu
We report the first two cases of imported Zika virus (ZIKV) infection in Romanian patients returning from areas with ongoing outbreaks and challenges for laboratory diagnostic; first one with a classical pattern of acute flaviviral infection and the second one with an interesting pattern of a secondary flaviviral (ZIKV) infection in a yellow fever-vaccinated child living abroad in an endemic area.
May 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28436989/corrigendum-the-clinically-approved-antiviral-drug-sofosbuvir-inhibits-zika-virus-replication
#18
Carolina Q Sacramento, Gabrielle R de Melo, Caroline S de Freitas, Natasha Rocha, Lucas Villas Bôas Hoelz, Milene Miranda, Natalia Fintelman-Rodrigues, Andressa Marttorelli, André C Ferreira, Giselle Barbosa-Lima, Juliana L Abrantes, Yasmine Rangel Vieira, Mônica M Bastos, Eduardo de Mello Volotão, Estevão Portela Nunes, Diogo A Tschoeke, Luciana Leomil, Erick Correia Loiola, Pablo Trindade, Stevens K Rehen, Fernando A Bozza, Patrícia T Bozza, Nubia Boechat, Fabiano L Thompson, Ana M B de Filippis, Karin Brüning, Thiago Moreno L Souza
No abstract text is available yet for this article.
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28435428/in-silico-cd4-cd8-t-cell-and-b-cell-immunity-associated-immunogenic-epitope-prediction-and-hla-distribution-analysis-of-zika-virus
#19
Essam Mohammed Janahi, Anupam Dhasmana, Vandana Srivastava, Aditya Narayan Sarangi, Sana Raza, Jamal M Arif, Madan Lal Bramha Bhatt, Mohtashim Lohani, Mohammed Yahya Areeshi, Anand Murari Saxena, Shafiul Haque
Zika virus (ZIKV) is a mosquito-borne flavivirus distributed all over Africa, South America and Asia. The infection with the virus may cause acute febrile sickness that clinically resembles dengue fever, yet there is no vaccine, no satisfactory treatment, and no means of evaluating the risk of the disease or prognosis in the infected people. In the present study, the efficacy of the host's immune response in reducing the risk of infectious diseases was taken into account to carry out immuno-informatics driven epitope screening strategy of vaccine candidates against ZIKV...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28435330/first-case-of-imported-chikungunya-infection-in-croatia-2016
#20
Boris Luksic, Nenad Pandak, Edita Drazic-Maras, Svjetlana Karabuva, Mislav Radic, Andrea Babic-Erceg, Ljubo Barbic, Vladimir Stevanovic, Tatjana Vilibic-Cavlek
In recent years, several European countries reported cases of imported chikungunya infection. We present the first imported clinically manifested chikungunya fever in Croatia. A 27-year-old woman returned to Croatia on 21 March 2016, after she stayed in Costa Rica for two months where she had noticed a mosquito bite on her left forearm. Five days after the mosquito bite she developed severe arthralgias, fever and erythematous papular rash. In next few days symptoms gradually subsided. After ten days she felt better, but arthralgias re-appeared accompanied with morning stiffness...
2017: International Medical Case Reports Journal
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