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Dengue zika flavivirus virus

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https://www.readbyqxmd.com/read/29915078/species-specific-disruption-of-sting-dependent-antiviral-cellular-defenses-by-the-zika-virus-ns2b3-protease
#1
Qiang Ding, Jenna M Gaska, Florian Douam, Lei Wei, David Kim, Metodi Balev, Brigitte Heller, Alexander Ploss
The limited host tropism of numerous viruses causing disease in humans remains incompletely understood. One example is Zika virus (ZIKV), an RNA virus that has reemerged in recent years. Here, we demonstrate that ZIKV efficiently infects fibroblasts from humans, great apes, New and Old World monkeys, but not rodents. ZIKV infection in human-but not murine-cells impairs responses to agonists of the cGMP-AMP synthase/stimulator of IFN genes (cGAS/STING) signaling pathway, suggesting that viral mechanisms to evade antiviral defenses are less effective in rodent cells...
June 18, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29900506/the-role-of-flaviviral-proteins-in-the-induction-of-innate-immunity
#2
L Cedillo-Barrón, J García-Cordero, G Shrivastava, S Carrillo-Halfon, M León-Juárez, J Bustos Arriaga, Pc León Valenzuela, B Gutiérrez Castañeda
Flaviviruses are positive, single-stranded, enveloped cytoplasmic sense RNA viruses that cause a variety of important diseases worldwide. Among them, Zika virus, West Nile virus, Japanese encephalitis virus, and Dengue virus have the potential to cause severe disease. Extensive studies have been performed to elucidate the structure and replication strategies of flaviviruses, and current studies are aiming to unravel the complex molecular interactions between the virus and host during the very early stages of infection...
2018: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/29900496/zika-virus-envelope-protein-and-antibody-complexes
#3
Lianpan Dai, Qihui Wang, Hao Song, George Fu Gao
Zika virus (ZIKV) is a re-emerged human pathogen, belonging to a super serogroup with dengue virus. Infection of ZIKV can lead to severe congenital symptoms, such as microcephaly, in newborns and Guillain-Barré syndrome in adults. To date, no prophylactics and therapeutics are available. Flavivirus envelope (E) protein represents the major target for neutralizing antibodies, while antibody response is the key correlate of protection against ZIKV infection. A panel of monoclonal antibodies (MAbs) were found to neutralize ZIKV infection and some of them exhibited strong potential as antivirals...
2018: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/29882971/breast-milk-transmission-of-flaviviruses-in-the-context-of-zika-virus-a-systematic-review
#4
REVIEW
Taylor Z Mann, Lisa B Haddad, Tonya R Williams, Susan L Hills, Jennifer S Read, Deborah L Dee, Eric J Dziuban, Janice Pérez-Padilla, Denise J Jamieson, Margaret A Honein, Carrie K Shapiro-Mendoza
BACKGROUND: Since the Zika virus epidemic in the Americas began in 2015, Zika virus transmission has occurred throughout the Americas. However, limited information exists regarding possible risks of transmission of Zika virus and other flaviviruses through breast feeding and human milk. We conducted a systematic review of the evidence regarding flaviviruses detection in and transmission through milk, specifically regarding Zika virus, Japanese encephalitis virus, tick-borne encephalitis virus, Powassan virus, West Nile virus, dengue virus, and yellow fever virus...
June 8, 2018: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/29881853/nanoparticle-enhanced-electrical-detection-of-zika-virus-on-paper-microchips
#5
Mohamed Shehata Draz, Manasa Venkataramani, Harini Lakshminarayanan, Ecem Saygili, Maryam Moazeni, Anish Vasan, Yudong Li, Xiaoming Sun, Stephane Hua, Xu G Yu, Hadi Shafiee
Zika virus (ZIKV) is a reemerging flavivirus causing an ongoing pandemic and public health emergency worldwide. There are currently no effective vaccines or specific therapy for Zika infection. Rapid, low-cost diagnostics for mass screening and early detection are of paramount importance in timely management of the infection at the point-of-care (POC). The current Zika diagnostics are laboratory-based and cannot be implemented at the POC particularly in resource-limited settings. Here, we develop a nanoparticle-enhanced viral lysate electrical sensing assay for Zika virus detection on paper microchips with printed electrodes...
June 8, 2018: Nanoscale
https://www.readbyqxmd.com/read/29845535/nucleocytoplasmic-trafficking-of-dengue-non-structural-protein-5-as-a-target-for-antivirals
#6
David A Jans, Alexander J Martin
Signal-dependent movement of proteins into and out of the nucleus through the importin superfamily of transporters is central to the replication of many viruses in infected cells, including RNA viruses such as the flavivirus Dengue virus (DENV). DENV non-structural protein 5 (NS5) traffics into and out of the host cell nucleus/nucleolus, being observed in the nucleus, although to differing extents, very early in infection in the case of all 4 DENV serotypes; with results from both reverse genetics and inhibitor studies indicating that this trafficking is critical to DENV infection...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29845532/establishment-and-application-of-flavivirus-replicons
#7
Beate M Kümmerer
Dengue virus (DENV) and Zika virus (ZIKV) are enveloped, positive-strand RNA viruses belonging to the genus Flavivirus in the family Flaviviridae. The genome of ~11 kb length encodes one long open reading frame flanked by a 5' and a 3' untranslated region (UTR). The 5' end is capped and the 3' end lacks a poly(A) tail. The encoded single polyprotein is cleaved co-and posttranslationally by cellular and viral proteases. The first one-third of the genome encodes the structural proteins (C-prM-E), whereas the nonstructural (NS) proteins NS1-NS2A-NS3-NS4A-2K-NS4B-NS5 are encoded by the remaining two-thirds of the genome...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29845531/the-transactions-of-ns3-and-ns5-in-flaviviral-rna-replication
#8
Moon Y F Tay, Subhash G Vasudevan
Dengue virus (DENV) replication occurs in virus-induced vesicles that contain the replication complex (RC) where viral RNA, viral proteins and host proteins participate in RNA-RNA, RNA-protein and protein-protein interactions to ensure viral genome synthesis. However, the details of the multitude of interactions involved in the biogenesis of the infectious virion are not fully understood. In this review, we will focus on the interaction between non-structural (NS) proteins NS3 and NS5, as well as their interactions with viral RNA and briefly also the interaction of NS5 with the host nuclear transport receptor protein importin-α...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29845529/the-dengue-virus-replication-complex-from-rna-replication-to-protein-protein-interactions-to-evasion-of-innate-immunity
#9
Julien Lescar, Sherryl Soh, Le Tian Lee, Subhash G Vasudevan, Congbao Kang, Siew Pheng Lim
Viruses from the Flavivirus family are the causative agents of dengue fever, Zika, Japanese encephalitis, West Nile encephalitis or Yellow fever and constitute major or emerging public health problems. A better understanding of the flavivirus replication cycle is likely to offer new opportunities for the design of antiviral therapies to treat severe conditions provoked by these viruses, but it should also help reveal fundamental biological mechanisms of the host cell. During virus replication, RNA synthesis is mediated by a dynamic and membrane-bound multi-protein assembly, named the replication complex (RC)...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29845522/historical-perspective-of-arboviruses-in-mozambique-and-its-implication-for-current-and-future-epidemics
#10
Eduardo Samo Gudo, Kerstin Falk, Julie Cliff
Mozambique is a tropical country situated in the Southern part of Africa, a region where data on the burden and epidemiology of arbovirus is presently quite scarce although the frequency of outbreaks caused by arboviruses is rapidly increasing. Outbreaks of dengue fever have been reported in Mozambique, Angola and Tanzania and a recent unprecedented outbreak of Yellow fever has been recorded in Angola. These new outbreaks collectively suggest that arboviruses, and specifically flavivirus infections, are endemic in Mozambique...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29791591/searching-for-the-best-real-time-rt-pcrs-to-detect-zika-virus-infections-the-importance-of-comparing-several-protocols
#11
F M de Moraes, D L A Espósito, T M Klein, B A L da Fonseca
Clinical manifestations of Zika, dengue, and chikungunya virus infections are very similar, making it difficult to reach a diagnosis based only on clinical grounds. In addition, there is an intense cross-reactivity between antibodies directed to Zika virus and other flaviviruses, and an accurate Zika diagnosis is best achieved by real-time RT-PCR. However, some real-time RT-PCR show better performance than others. To reach the best possible Zika diagnosis, the analytic sensitivity of some probe-based real-time RT-PCR amplifying Zika virus RNA was evaluated in spiked and clinical samples...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29779827/zika-virus-report-from-the-task-force-on-tropical-diseases-by-the-world-federation-of-societies-of-intensive-and-critical-care-medicine
#12
Gisele Sampaio Silva, Guy A Richards, Tim Baker, Jorge Hidalgo, Juan Ignacio Silesky Jiménez, Pravin Amin
Zika fever is an acute infectious disease caused by the Zika virus (ZIKV), an RNA virus belonging to the genus Flavivirus. ZIKV can be transmitted by bites from Aedes aegypti and Aedes albopictus species, sexual activity, blood transfusion and from mother to fetus during pregnancy and delivery. A total of 50 territories and countries in the Americas had reported ZIKV infections. For those with symptoms, the presentation is similar to dengue fever with body aches, joint pain, fatigue, malaise, fever and conjunctivitis lasting up to seven days...
April 5, 2018: Journal of Critical Care
https://www.readbyqxmd.com/read/29773774/us-and-cuban-scientists-forge-collaboration-on-arbovirus-research
#13
Jorge Pérez-Ávila, Maria G Guzmán-Tirado, Jorge Fraga-Nodarse, Gray Handley, James Meegan, Jose L Pelegrino-Martínez de la Cotera, Anthony S Fauci
After December 17, 2014, when the US and Cuban governments announced their intent to restore relations, the two countries participated in various exchange activities in an effort to encourage cooperation in public health, health research and biomedical sciences. The conference entitled Exploring Opportunities for Arbovirus Research Collaboration, hosted at Havana's Hotel Nacional, was part of these efforts and was the first major US-Cuban scientific conference in over 50 years. Its purpose was to share information about current arbovirus research and recent findings, and to explore opportunities for future joint research...
April 2018: MEDICC Review
https://www.readbyqxmd.com/read/29760190/tick-borne-encephalitis-virus-nonstructural-protein-ns5-induces-rantes-expression-dependent-on-the-rna-dependent-rna-polymerase-activity
#14
Zifeng Zheng, Jieyu Yang, Xuan Jiang, Yalan Liu, Xiaowei Zhang, Mei Li, Mudan Zhang, Ming Fu, Kai Hu, Hanzhong Wang, Min-Hua Luo, Peng Gong, Qinxue Hu
Tick-borne encephalitis virus (TBEV) is one of the flaviviruses that targets the CNS and causes encephalitis in humans. The mechanism of TBEV that causes CNS destruction remains unclear. It has been reported that RANTES-mediated migration of human blood monocytes and T lymphocytes is specifically induced in the brain of mice infected with TBEV, which causes ensuing neuroinflammation and may contribute to brain destruction. However, the viral components responsible for RANTES induction and the underlying mechanisms remain to be fully addressed...
May 14, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29751200/biosensor-based-selective-detection-of-zika-virus-specific-antibodies-in-infected-individuals
#15
Gustavo Cabral-Miranda, Ana R Cardoso, Luis C S Ferreira, M Goreti F Sales, Martin F Bachmann
Zika virus (ZIKV) recently emerged as a global threat subsequent to its global spread because it induces microencephaly and other brain damages in infants born to infected mothers. Epidemiological monitoring of infection has been hampered by the absence of reliable serological tests capable to distinguish between ZIKV and other Flavivirus infections, in particular Dengue virus (DENV). As both viruses are transmitted by the same mosquito-species, their distributions largely overlap and reliable serological distinction between the viruses is essential...
May 1, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29749366/experimental-zika-virus-infection-in-aedes-aegypti-susceptibility-transmission-co-infection-with-dengue-chikungunya-viruses
#16
Devendra T Mourya, Mangesh D Gokhale, Triparna D Majumdar, Pragya D Yadav, Vimal Kumar, Mangala S Mavale
Background & objectives: There are reports about the susceptibility of Aedes mosquitoes to ZIKV from various countries, however, no such information is available from Indian sub-continent, although, high level of group cross-reactivity of ZIKV with other flaviviruses has been reported. During outbreak situations, many cases of Dengue (DEN) and Chikungunya (CHIK) are reported. In such scenario, vector mosquitoes are likely to get co-infection/secondary-infection with one or other virus...
January 2018: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29740424/modulation-of-dengue-zika-virus-pathogenicity-by-antibody-dependent-enhancement-and-strategies-to-protect-against-enhancement-in-zika-virus-infection
#17
REVIEW
Rekha Khandia, Ashok Munjal, Kuldeep Dhama, Kumaragurubaran Karthik, Ruchi Tiwari, Yashpal Singh Malik, Raj Kumar Singh, Wanpen Chaicumpa
Antibody-dependent enhancement (ADE) is a phenomenon in which preexisting poorly neutralizing antibodies leads to enhanced infection. It is a serious concern with mosquito-borne flaviviruses such as Dengue virus (DENV) and Zika virus (ZIKV). In vitro experimental evidences have indicated the preventive, as well as a pathogenicity-enhancing role, of preexisting DENV antibodies in ZIKV infections. ADE has been confirmed in DENV but not ZIKV infections. Principally, the Fc region of the anti-DENV antibody binds with the fragment crystallizable gamma receptor (FcγR), and subsequent C1q interactions and immune effector functions are responsible for the ADE...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29712653/direct-activation-of-adenosine-monophosphate-activated-protein-kinase-ampk-by-pf-06409577-inhibits-flavivirus-infection-through-modification-of-host-cell-lipid-metabolism
#18
Nereida Jiménez de Oya, Ana-Belén Blázquez, Josefina Casas, Juan-Carlos Saiz, Miguel A Martín Acebes
Mosquito-borne flaviviruses are a group of RNA viruses that constitute global threats for human and animal health. Replication of these pathogens is strictly dependent on cellular lipid metabolism. We have evaluated the effect of the pharmacological activation of Adenosine Monophosphate-activated Protein Kinase (AMPK), a master regulator of lipid metabolism, on the infection of three medically relevant flaviviruses: West Nile virus (WNV), Zika virus (ZIKV) and dengue virus (DENV). WNV is responsible for recurrent outbreaks of meningitis and encephalitis affecting humans and horses worldwide...
April 30, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29708542/a-simple-flow-cytometry-based-assay-to-determine-in-vitro-antibody-dependent-enhancement-of-dengue-virus-using-zika-virus-convalescent-serum
#19
William G Valiant, Joseph J Mattapallil
Antibody dependent enhancement of infection has been shown to play a major role in Dengue viral pathogenesis. Traditional assays that measure the capacity of antibodies or serum to enhance infection in impermissible cell lines have relied on using viral output in the media followed by plaque assays to quantify infection. More recently, these assays have examined Dengue virus (DENV) infection in the cell lines using fluorescently labeled antibodies. Both these approaches have limitations that restrict the widespread use of these techniques...
April 10, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29692780/genome-wide-analysis-to-identify-hla-factors-potentially-associated-with-severe-dengue
#20
Sudheer Gupta, Ankita Agarwal, Amod Kumar, Debasis Biswas
The pathogenesis of dengue hemorrhagic fever (DHF), following dengue virus (DENV) infection, is a complex and poorly understood phenomenon. In view of the clinical need of identifying patients with higher likelihood of developing this severe outcome, we undertook a comparative genome-wide association analysis of epitope variants from sequences available in the ViPR database that have been reported to be differentially related to dengue fever and DHF. Having enumerated the incriminated epitope variants, we determined the corresponding HLA alleles in the context of which DENV infection could potentially precipitate DHF...
2018: Frontiers in Immunology
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