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https://www.readbyqxmd.com/read/28633961/full-genome-amplification-and-sequencing-of-zika-viruses-using-a-targeted-amplification-approach
#1
Mariana Leguia, Cristhopher D Cruz, Vidal Felices, Armando Torre, Gilda Troncos, Victoria Espejo, Carolina Guevara, Christopher Mores
We have developed methods for full-genome sequencing of Zika viruses (ZIKVs) based on a targeted amplification approach. We used alignments of publicly available complete genome data to design a primer set that selectively amplifies ZIKVs. The approach includes amplification strategies for templates present at both high- and low-copy number, and PCR cycling conditions that have been normalized across genome fragments in order to streamline laboratory handling. Abundant templates can be amplified using a strategy that uses 6 overlapping amplicons to cover the complete viral genome, whereas scarce templates can be amplified using a strategy that uses 11 overlapping amplicons of smaller size...
June 17, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28633549/an-update-on-zika-vaccine-developments
#2
Anna Durbin, Annelies Wilder-Smith
The devastating consequences of congenital Zika virus (ZIKV) infection led to a global response directed toward a better understanding of the epidemiology and pathogenesis of ZIKV and to efforts at vaccine development. As a result, there are currently 45 ZIKV vaccine candidates in development. Areas covered: Both traditional (purified inactivated, live attenuated, viral-vectored, recombinant sub-unit) and novel (DNA, self-replicating RNA, mRNA) vaccine platforms are being utilized. For emergency use, vaccines that are appropriate for women of child-bearing age (including pregnant women) are being developed...
June 21, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28623165/ocular-effects-of-zika-virus-a-review
#3
REVIEW
Maria Carolina Marquezan, Camila V Ventura, Jeanne S Sheffield, William Christopher Golden, Revaz Omiadze, Rubens Belfort, William May
Zika virus (ZIKV) was considered an innocent pathogen while restricted to the African and Asian population; however, after reaching the Americas in March 2015, it became a global threat. Despite usually causing mild or no symptoms in infected adults, ZIKV displays a different behavior towards fetuses. When infected during gestation, fetuses have their immature neural cells killed by the virus and consequently have devastating findings at birth. In the past year, the drastic effects of ZIKV infection in newborns include neurological, ophthalmological, audiological, and skeletal abnormalities...
June 13, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28617719/guillain-barr%C3%A3-syndrome-and-zika-virus-outbreaks
#4
Osvaldo J M Nascimento, Ivan R F da Silva
PURPOSE OF REVIEW: Arboviruses have been associated with central and peripheral nervous system injuries, in special the flaviviruses. Guillain-Barré syndrome (GBS), transverse myelitis, meningoencephalitis, ophthalmological manifestations, and other neurological complications have been recently associated to Zika virus (ZIKV) infection. In this review, we aim to analyze the epidemiological aspects, possible pathophysiology, and what we have learned about the clinical and laboratory findings, as well as treatment of patients with ZIKV-associated neurological complications...
June 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28614803/delineating-antibody-recognition-against-zika-virus-during-natural-infection
#5
Lei Yu, Ruoke Wang, Fei Gao, Min Li, Jianying Liu, Jian Wang, Wenxin Hong, Lingzhai Zhao, Yingfen Wen, Chibiao Yin, Hua Wang, Qi Zhang, Yangyang Li, Panpan Zhou, Rudian Zhang, Yang Liu, Xiaoping Tang, Yongjun Guan, Cheng-Feng Qin, Ling Chen, Xuanling Shi, Xia Jin, Gong Cheng, Fuchun Zhang, Linqi Zhang
Zika virus (ZIKV) is an emerging mosquito-transmitted flavivirus that shares a considerable degree of homology with dengue virus (DENV). Here, we examined longitudinal antibody response against ZIKV during natural infection in 2 convalescent individuals. By decomposing the antibody recognition into DI/DII and DIII of the E glycoprotein, we showed their development in humans followed a spatiotemporal hierarchy. Plasma binding to DI/DII appeared to peak and wane during early infection with extensive cross-reactivity with DI/DII of DENV...
June 15, 2017: JCI Insight
https://www.readbyqxmd.com/read/28614394/first-report-of-naturally-infected-aedes-aegypti-with-chikungunya-virus-genotype-ecsa-in-the-americas
#6
André Luis Costa-da-Silva, Rafaella Sayuri Ioshino, Vivian Petersen, Antonio Fernando Lima, Marielton Dos Passos Cunha, Michael R Wiley, Jason T Ladner, Karla Prieto, Gustavo Palacios, Danuza Duarte Costa, Lincoln Suesdek, Paolo Marinho de Andrade Zanotto, Margareth Lara Capurro
BACKGROUND: The worldwide expansion of new emergent arboviruses such as Chikungunya and Zika reinforces the importance in understanding the role of mosquito species in spreading these pathogens in affected regions. This knowledge is essential for developing effective programs based on species specificity to avoid the establishment of endemic transmission cycles sustained by the identified local vectors. Although the first autochthonous transmission of Chikungunya virus was described in 2014 in the north of Brazil, the main outbreaks were reported in 2015 and 2016 in the northeast of Brazil...
June 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28610876/a-single-substitution-changes-zika-virus-infectivity-in-mosquitoes
#7
Guan-Zhu Han
Zika virus (ZIKV) has caused outbreaks in the Pacific and the Americas. The mechanism underlying the recent ZIKV epidemic remains obscure. A recent study reveals that an amino acid substitution is associated with increased infectivity of ZIKV in the Aedes aegypti mosquito.
June 10, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28608813/zika-virus-recent-advances-towards-the-development-of-vaccines-and-therapeutics
#8
REVIEW
Monica A McArthur
Zika is a rapidly emerging public health threat. Although clinical infection is frequently mild, significant neurological manifestations have been demonstrated in infants born to Zika virus (ZIKV) infected mothers. Due to the substantial ramifications of intrauterine infection, effective counter-measures are urgently needed. In order to develop effective anti-ZIKV vaccines and therapeutics, improved animal models and a better understanding of immunological correlates of protection against ZIKV are required...
June 13, 2017: Viruses
https://www.readbyqxmd.com/read/28606821/analysis-of-synonymous-codon-usage-in-zika-virus
#9
Snawar Hussain, Sahibzada Tasleem Rasool
Zika virus is a zoonotic pathogen, which have made frequent incursion into the human population in Africa and South East Asia over the course of several decades but never reached to the pandemic proportions until the most recent outbreak. Viruses are solely dependent on host synthetic machinery for their replication cycle; therefore, replication and persistence in a host species of different genetic background requires certain degree of adaptation. These adaptations are necessary to avoid detection from host immune surveillance and maximize the utilization of available resources for efficient viral replication...
June 9, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28604797/a-human-inferred-germline-antibody-binds-to-an-immunodominant-epitope-and-neutralizes-zika-virus
#10
Diogo M Magnani, Cassia G T Silveira, Brandon C Rosen, Michael J Ricciardi, Núria Pedreño-Lopez, Martin J Gutman, Varian K Bailey, Helen S Maxwell, Aline Domingues, Lucas Gonzalez-Nieto, Vivian I Avelino-Silva, Mateus Trindade, Juliana Nogueira, Consuelo S Oliveira, Alvino Maestri, Alvina Clara Felix, José Eduardo Levi, Mauricio L Nogueira, Mauricio A Martins, José M Martinez-Navio, Sebastian P Fuchs, Stephen S Whitehead, Dennis R Burton, Ronald C Desrosiers, Esper G Kallas, David I Watkins
The isolation of neutralizing monoclonal antibodies (nmAbs) against the Zika virus (ZIKV) might lead to novel preventative strategies for infections in at-risk individuals, primarily pregnant women. Here we describe the characterization of human mAbs from the plasmablasts of an acutely infected patient. One of the 18 mAbs had the unusual feature of binding to and neutralizing ZIKV despite not appearing to have been diversified by affinity maturation. This mAb neutralized ZIKV (Neut50 ~ 2 μg/ml) but did not react with any of the four dengue virus serotypes...
June 12, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28601976/zika-virus-as-an-emerging-neuropathogen-mechanisms-of-neurovirulence-and-neuro-immune-interactions
#11
REVIEW
Gerwyn Morris, Tatiana Barichello, Brendon Stubbs, Cristiano A Köhler, André F Carvalho, Michael Maes
Zika virus (ZIKV) is an emerging arbovirus of the genus Flaviviridae, which causes a febrile illness and has spread from across the Pacific to the Americas in a short timeframe. Convincing evidence has implicated the ZIKV to incident cases of neonatal microcephaly and a set of neurodevelopmental abnormalities referred to as the congenital Zika virus syndrome. In addition, emerging data points to an association with the ZIKV and the development of the so-called Guillain-Barre syndrome, an acute autoimmune polyneuropathy...
June 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28597088/viral-polymerase-inhibitors-t-705-and-t-1105-are-potential-inhibitors-of-zika-virus-replication
#12
Lei Cai, Yajie Sun, Yabin Song, Likun Xu, Zhuchun Bei, Dongna Zhang, Yuanyuan Dou, Hongquan Wang
Since 2015, 69 countries and territories have reported evidence of vector-borne Zika virus (ZIKV) transmission. Currently, there are no effective licensed vaccines or drugs available for the treatment or prevention of ZIKV infection. We tested a series of compounds for their ability to inhibit ZIKV replication in cell culture. The compounds in T-705 (favipiravir) and T-1105 were found to have antiviral activity, suggesting that these compounds are promising candidates for further development as specific antiviral drugs against ZIKV...
June 8, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28595824/zika-in-the-americas-year-2-what-have-we-learned-what-gaps-remain-a-report-from-the-global-virus-network
#13
REVIEW
Matthew T Aliota, Leda Bassit, Shelton S Bradrick, Bryan Cox, Mariano A Garcia-Blanco, Christina Gavegnano, Thomas C Friedrich, Thaddeus G Golos, Diane E Griffin, Andrew Haddow, Esper G Kallas, Uriel Kitron, Marc Lecuit, Diogo M Magnani, Caroline Marrs, Natalia Mercer, Edward McSweegan, Lisa Ng, David H O'Connor, Jorge E Osorio, Guilherme S Ribeiro, Michael Ricciardi, Shannan L Rossi, George Saade, Raymond F Schinazi, Geraldine O Schott-Lerner, Chao Shan, Pei-Yong Shi, David I Watkins, Nikos Vasilakis, Scott C Weaver
In response to the outbreak of Zika virus (ZIKV) infection in the Western Hemisphere and the recognition of a causal association with fetal malformations, the Global Virus Network (GVN) assembled an international taskforce of virologists to promote basic research, recommend public health measures and encourage the rapid development of vaccines, antiviral therapies and new diagnostic tests. In this article, taskforce members and other experts review what has been learned about ZIKV disease in humans, its modes of transmission and the cause and nature of associated congenital manifestations...
June 5, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28592527/zika-virus-hijacks-stress-granule-proteins-and-modulates-the-host-stress-response
#14
Shangmei Hou, Anil Kumar, Zaikun Xu, Adriana M Airo, Iryna Stryapunina, Cheung Pang Wong, William Branton, Egor Tchesnokov, Matthias Götte, Christopher Power, Tom C Hobman
Zika virus (ZIKV), a member of the Flaviviridae family, has recently emerged as an important human pathogen with increasing economic and health impact worldwide. Because of its teratogenic nature and association with the serious neurological condition Guillain-Barré syndrome, a tremendous amount of effort has focused on understanding ZIKV pathogenesis. To gain further insights into ZIKV interaction with host cells, we investigated how this pathogen affects stress response pathways. While ZIKV infection induces stress signaling that leads to phosphorylation of eIF2α and cellular translational arrest, stress granule (SG) formation was inhibited...
June 7, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28591470/cost-projections-for-implementation-of-safety-interventions-to-prevent-transfusion-transmitted-zika-virus-infection-in-the-united-states
#15
Katherine D Ellingson, Mathew R P Sapiano, Kathryn A Haass, Alexandra A Savinkina, Misha L Baker, Richard A Henry, James J Berger, Matthew J Kuehnert, Sridhar V Basavaraju
BACKGROUND: In August 2016, the Food and Drug Administration advised US blood centers to screen all whole blood and apheresis donations for Zika virus (ZIKV) with an individual-donor nucleic acid test (ID-NAT) or to use approved pathogen reduction technology (PRT). The cost of implementing this guidance nationally has not been assessed. STUDY DESIGN AND METHODS: Scenarios were constructed to characterize approaches to ZIKV screening, including universal ID-NAT, risk-based seasonal allowance of minipool (MP) NAT by state, and universal MP-NAT...
June 2017: Transfusion
https://www.readbyqxmd.com/read/28591218/when-is-genetic-modification-socially-acceptable-when-used-to-advance-human-health-through-avenues-other-than-food
#16
Nicole J Olynk Widmar, S R Dominick, Wallace E Tyner, Audrey Ruple
Given the potential for genetic modification (GM) to impact human health, via food and health mechanisms, a greater understanding of the social acceptance of GM is necessary to facilitate improved health outcomes. This analysis sought to quantify U.S. residents' acceptance of GM across five potential uses (grain production, fruit or vegetable production, livestock production, human medicine, and human health, i.e. disease vector control) and provides an in-depth analysis of a timely case study-the Zika virus (ZIKV)...
2017: PloS One
https://www.readbyqxmd.com/read/28589934/dna-vaccination-protects-mice-against-zika-virus-induced-damage-to-the-testes
#17
Bryan D Griffin, Kar Muthumani, Bryce M Warner, Anna Majer, Mable Hagan, Jonathan Audet, Derek R Stein, Charlene Ranadheera, Trina Racine, Marc-Antoine De La Vega, Jocelyne Piret, Stephanie Kucas, Kaylie N Tran, Kathy L Frost, Christine De Graff, Geoff Soule, Leanne Scharikow, Jennifer Scott, Gordon McTavish, Valerie Smid, Young K Park, Joel N Maslow, Niranjan Y Sardesai, J Joseph Kim, Xiao-Jian Yao, Alexander Bello, Robbin Lindsay, Guy Boivin, Stephanie A Booth, Darwyn Kobasa, Carissa Embury-Hyatt, David Safronetz, David B Weiner, Gary P Kobinger
Zika virus (ZIKV) is an emerging pathogen causally associated with serious sequelae in fetuses, inducing fetal microcephaly and other neurodevelopment defects. ZIKV is primarily transmitted by mosquitoes, but can persist in human semen and sperm, and sexual transmission has been documented. Moreover, exposure of type-I interferon knockout mice to ZIKV results in severe damage to the testes, epididymis and sperm. Candidate ZIKV vaccines have shown protective efficacy in preclinical studies carried out in animal models, and several vaccines have entered clinical trials...
June 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28583742/visual-and-motor-deficits-in-grown-up-mice-with-congenital-zika-virus-infection
#18
Liyuan Cui, Peng Zou, Er Chen, Hao Yao, Hao Zheng, Qian Wang, Jing-Ning Zhu, Shibo Jiang, Lu Lu, Jiayi Zhang
Human infants with congenital Zika virus (ZIKV) infection exhibit a range of symptoms including microcephaly, intracranial calcifications, macular atrophy and arthrogryposis. More importantly, prognosis data have lagged far behind the recent outbreak of ZIKV in 2015. In this work, we allow congenitally ZIKV-infected mice to grow into puberty. These mice exhibited motor incoordination and visual dysfunctions, which can be accounted by anatomical defects in the retina and cerebellar cortex. In contrary, anxiety level of the ZIKV-infected mice is normal...
April 24, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28579764/is-zika-virus-an-emerging-torch-agent-an-invited-commentary
#19
Mohammad Zare Mehrjardi
Zika virus (ZIKV) is a mosquito-borne arbovirus from the family Flaviviridae, which had caused some epidemics since its discovery in 1947 without any significant impacts on public health. In 2015, however, a 20-fold increase in congenital microcephaly cases in northeastern Brazil was attributed to prenatally acquired ZIKV infection. Traditionally, TORCH agents have 4 common characteristics including causing a mild illness in infected mother, vertical transmission to fetus, developing several anomalies in the affected fetus, and in some instances, maternal therapy may not ameliorate fetal prognosis...
2017: Virology: Research and Treatment
https://www.readbyqxmd.com/read/28579320/t-cell-immunity-and-zika-virus-vaccine-development
#20
REVIEW
Noemia S Lima, Morgane Rolland, Kayvon Modjarrad, Lydie Trautmann
The recent Zika virus (ZIKV) epidemic has created an urgent need for a safe and effective vaccine. There is still a dearth of knowledge about ZIKV immunity, but years of investigation into the immunobiology of other flaviviruses has helped to accelerate the development of a ZIKV vaccine. Although the humoral immune response generates the primary correlate of protection from disease, robust T cell responses could enhance ZIKV vaccine efficacy. Additionally, pre-existing immunity to related flaviviruses could generate cross-reactive T cells that may affect immune responses upon vaccination...
June 1, 2017: Trends in Immunology
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