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Zika virus vaccine

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https://www.readbyqxmd.com/read/28939807/a-single-dose-live-attenuated-vaccine-prevents-zika-virus-pregnancy-transmission-and-testis-damage
#1
Chao Shan, Antonio E Muruato, Brett W Jagger, Justin Richner, Bruno T D Nunes, Daniele B A Medeiros, Xuping Xie, Jannyce G C Nunes, Kaitlyn M Morabito, Wing-Pui Kong, Theodore C Pierson, Alan D Barrett, Scott C Weaver, Shannan L Rossi, Pedro F C Vasconcelos, Barney S Graham, Michael S Diamond, Pei-Yong Shi
Zika virus infection during pregnancy can cause congenital abnormities or fetal demise. The persistence of Zika virus in the male reproductive system poses a risk of sexual transmission. Here we demonstrate that live-attenuated Zika virus vaccine candidates containing deletions in the 3' untranslated region of the Zika virus genome (ZIKV-3'UTR-LAV) prevent viral transmission during pregnancy and testis damage in mice, as well as infection of nonhuman primates. After a single-dose vaccination, pregnant mice challenged with Zika virus at embryonic day 6 and evaluated at embryonic day 13 show markedly diminished levels of viral RNA in maternal, placental, and fetal tissues...
September 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28928416/zika-virus-infection-confers-protection-against-west-nile-virus-challenge-in-mice
#2
Ángela Vázquez-Calvo, Ana-Belén Blázquez, Estela Escribano-Romero, Teresa Merino-Ramos, Juan-Carlos Saiz, Miguel A Martín-Acebes, Nereida Jiménez de Oya
Flaviviruses are RNA viruses that constitute a worrisome threat to global human and animal health. Zika virus (ZIKV), which was initially reported to cause a mild disease, recently spread in the Americas, infecting millions of people. During this recent epidemic, ZIKV infection has been linked to serious neurological diseases and birth defects, specifically Guillain-Barrè syndrome (GBS) and microcephaly. Because information about ZIKV immunity remains scarce, we assessed the humoral response of immunocompetent mice to infection with three viral strains of diverse geographical origin (Africa, Asia and America)...
September 20, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28916391/zika-virus-structural-biology-and-progress-in-vaccine-development
#3
REVIEW
Hsiao-Han Lin, Bak-Sau Yip, Li-Min Huang, Suh-Chin Wu
The growing number of zika virus (ZIKV) infections plus a 20-fold increase in neonatal microcephaly in newborns in Brazil have raised alarms in many countries regarding the threat to pregnant women. Instances of microcephaly and central nervous system malformations continue to increase in ZIKV outbreak regions. ZIKV is a small enveloped positive-strand RNA virus belonging to the Flavivirus genus of the Flaviviridae family. High-resolution ZIKV structures recently identified by cryo-electron microscopy indicate that the overall ZIKV structure is similar to those of other flaviviruses...
September 12, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28903515/update-from-the-advisory-committee-on-immunization-practices
#4
Sean T O'Leary, Yvonne A Maldonado, Carrie L Byington
The Advisory Committee on Immunization Practices (ACIP), a group of medical and public health experts, meets 3 times per year to develop recommendations for vaccine use in the United States. The group has 15 voting members, and each member's term is 4 years. ACIP members and Centers for Disease Control and Prevention (CDC) staff discuss the epidemiology of vaccine-preventable diseases and vaccine research, effectiveness, safety data, and clinical trial results. Representatives from the American Academy of Pediatrics (C...
September 1, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28898286/structural-investigation-of-c6-36-and-vero-cell-cultures-infected-with-a-brazilian-zika-virus
#5
Debora Ferreira Barreto-Vieira, Fernanda Cunha Jácome, Marcos Alexandre Nunes da Silva, Gabriela Cardoso Caldas, Ana Maria Bispo de Filippis, Patrícia Carvalho de Sequeira, Elen Mello de Souza, Audrien Alves Andrade, Pedro Paulo de Abreu Manso, Gisela Freitas Trindade, Sheila Maria Barbosa Lima, Ortrud Monika Barth
Zika virus (ZIKV) is a member of the flavivirus genus, and its genome is approximately 10.8 kilobases of positive-strand RNA enclosed in a capsid and surrounded by a membrane. Studies on the replication dynamics of ZIKV are scarce, which limits the development of antiviral agents and vaccines directed against ZIKV. In this study, Aedes albopictus mosquito lineage cells (C6/36 cells) and African green monkey kidney epithelial cells (Vero cells) were inoculated with a ZIKV sample isolated from a Brazilian patient, and the infection was characterized by immunofluorescence staining, phase contrast light microscopy, transmission electron microscopy and real-time RT-PCR...
2017: PloS One
https://www.readbyqxmd.com/read/28893603/human-polyclonal-antibodies-produced-in-transchromosomal-cattle-prevent-lethal-zika-virus-infection-and-testicular-atrophy-in-mice
#6
Derek R Stein, Joseph W Golden, Bryan D Griffin, Bryce M Warner, Charlene Ranadheera, Leanne Scharikow, Angela Sloan, Kathy L Frost, Darwyn Kobasa, Stephanie A Booth, Matthew Josleyn, John Ballantyne, Eddie Sullivan, Jin-An Jiao, Hua Wu, Zhongde Wang, Jay W Hooper, David Safronetz
Zika virus (ZIKV) is rapidly spreading throughout the Americas and is associated with significant fetal complications, most notably microcephaly. Treatment with polyclonal antibodies for pregnant women at risk of ZIKV-related complications could be a safe alternative to vaccination. We found that large quantities of human polyclonal antibodies could be rapidly produced in transchromosomal bovines (TcB) and successfully used to protect mice from lethal infection. Additionally, antibody treatment eliminated ZIKV induced tissue damage in immunologically privileged sites such as the brain and testes and protected against testicular atrophy...
September 8, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28886944/attitudes-towards-zika-screening-and-vaccination-acceptability-among-pregnant-women-in-malaysia
#7
Li Ping Wong, Haridah Alias, Jamiyah Hassan, Sazaly AbuBakar
The aim of this study was to examine the willingness of pregnant women to have prenatal screening for the Zika virus (ZIKV). Secondly, the study also assessed the acceptability of a hypothetical Zika vaccination and its association with the health belief model (HBM) constructs. A cross-sectional study was conducted from 4th October to 11th November 2016, among pregnant women who attended antenatal care at the University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia. The majority (81.8%) was willing to be tested for ZIKV and 78% felt that their spouse would be willing to be tested for ZIKV...
September 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28878742/zika-virus-what-have-we-learnt-since-the-start-of-the-recent-epidemic
#8
REVIEW
Juan-Carlos Saiz, Miguel A Martín-Acebes, Rubén Bueno-Marí, Oscar D Salomón, Luis C Villamil-Jiménez, Jorg Heukelbach, Carlos H Alencar, Paul K Armstrong, Tania M Ortiga-Carvalho, Rosalia Mendez-Otero, Paulo H Rosado-de-Castro, Pedro M Pimentel-Coelho
Zika is a viral disease transmitted mainly by mosquitoes of the genus Aedes. In recent years, it has expanded geographically, changing from an endemic mosquito-borne disease across equatorial Asia and Africa, to an epidemic disease causing large outbreaks in several areas of the world. With the recent Zika virus (ZIKV) outbreaks in the Americas, the disease has become a focus of attention of public health agencies and of the international research community, especially due to an association with neurological disorders in adults and to the severe neurological and ophthalmological abnormalities found in fetuses and newborns of mothers exposed to ZIKV during pregnancy...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28877637/ghost-probiotics-with-a-combined-regimen-a-novel-therapeutic-approach-against-the-zika-virus-an-emerging-world-threat
#9
Vivek K Bajpai, Vishal Chandra, Na-Hyung Kim, Rajni Rai, Pradeep Kumar, Kangmin Kim, Abhinav Aeron, Sun Chul Kang, D K Maheshwari, MinKyun Na, Irfan A Rather, Yong-Ha Park
The Zika virus (ZIKV) used to be an obscure flavivirus closely related to dengue virus (DENV). Transmission of this epidemic pathogen occurs mainly via mosquitoes, but it is also capable of placental and sexual transmission. Although the characteristics of these viruses are well defined, infections are unpredictable in terms of disease severity, unusual clinical manifestations, unexpected methods of transmission, long-term persistence, and the development of new strains. Recently, ZIKV has gained huge medical attention following the large-scale epidemics around the world, and reported cases of congenital abnormalities associated with Zika virus infections which have created a public health emergency of international concern...
September 7, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28874759/prior-exposure-to-zika-virus-significantly-enhances-peak-dengue-2-viremia-in-rhesus-macaques
#10
Jeffy George, William G Valiant, Mary J Mattapallil, Michelle Walker, Yan-Jang S Huang, Dana L Vanlandingham, John Misamore, Jack Greenhouse, Deborah E Weiss, Daniela Verthelyi, Stephen Higgs, Hanne Andersen, Mark G Lewis, Joseph J Mattapallil
Structural and functional homologies between the Zika and Dengue viruses' envelope proteins raise the possibility that cross-reactive antibodies induced following Zika virus infection might enhance subsequent Dengue infection. Using the rhesus macaque model we show that prior infection with Zika virus leads to a significant enhancement of Dengue-2 viremia that is accompanied by neutropenia, lympocytosis, hyperglycemia, and higher reticulocyte counts, along with the activation of pro-inflammatory monocyte subsets and release of inflammatory mediators...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870338/alternate-paradigms-on-zika-virus-related-complications-an-analytical-review
#11
REVIEW
Baburajan Radha, Gnanaraj Muniraj
The proportion of the reported cases of Zika virus (ZIKV) infection reached the status of a pandemic. Numerous studies are being conducted on the isolation of ZIKV strains from various epidemics, diagnosis of the infections, various animal models and cell culture designs to study the pathogenesis of ZIKV in the attempts to find an effective ZIKV vaccine. This review focuses upon the 'Off-Spectrum' body of studies which analyses the epidemiology, pathogenesis and other attributes of ZIKV in the light of various dissident hypotheses...
July 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28869941/identifying-attenuating-mutations-tools-for-a-new-vaccine-design-against-flaviviruses
#12
Cécile Khou, Nathalie Pardigon
Emerging Flaviviruses pose an increasing threat to global human health. To date, human vaccines against yellow fever virus (YFV), Japanese encephalitis virus (JEV), dengue virus (DV), and tick-borne encephalitis virus (TBEV) exist. However, there is no human vaccine against other Flaviviruses such as Zika virus (ZIKV) and West Nile virus (WNV). In order to restrict their spread and to protect populations against the diseases they induce, vaccines against these emerging viruses must be designed. Obtaining new live attenuated Flavivirus vaccines using molecular biology methods is now possible...
September 5, 2017: Intervirology
https://www.readbyqxmd.com/read/28864425/functional-rna-during-zika-virus-infection
#13
REVIEW
Giel P Göertz, Sandra R Abbo, Jelke J Fros, Gorben P Pijlman
Zika virus (ZIKV; family Flaviviridae; genus Flavivirus) is a pathogenic mosquito-borne RNA virus that currently threatens human health in the Americas, large parts of Asia and occasionally elsewhere in the world. ZIKV infection is often asymptomatic but can cause severe symptoms including congenital microcephaly and Guillain-Barré syndrome. The positive single-stranded RNA genome of the mosquito-borne ZIKV requires effective replication in two evolutionary distinct hosts - mosquitoes and primates. In addition to some of the viral proteins, the ZIKV genomic RNA and functional RNAs produced thereof aid in the establishment of productive infection and the evasion of host cell antiviral responses...
August 31, 2017: Virus Research
https://www.readbyqxmd.com/read/28856072/association-of-zika-virus-with-myocarditis-heart-failure-and-arrhythmias-a-literature-review
#14
REVIEW
Abdul M Minhas, Asra Nayab, Shobana Iyer, Mehek Narmeen, Kaneez Fatima, Muhammad S Khan, Jonathan Constantin
As the concerns regarding Zika virus (ZIKV) are mostly of neurological disorders, especially in neonates and infants, other possible threats of the virus may have been overlooked. Our study focuses on the potential threat that ZIKV may pose to the heart like that of similar arboviral diseases. We conducted a literature search of multiple terms in March 2017 using the search engines, PubMed, Embase, and SCOPUS. Articles were then reviewed by two independent reviewers, adhering strictly to our review criteria...
June 27, 2017: Curēus
https://www.readbyqxmd.com/read/28855646/immunization-with-truncated-envelope-protein-of-zika-virus-induces-protective-immune-response-in-mice
#15
Jian-Feng Han, Yang Qiu, Jiu-Yang Yu, Hong-Jiang Wang, Yong-Qiang Deng, Xiao-Feng Li, Hui Zhao, Han-Xiao Sun, Cheng-Feng Qin
The global spread of Zika virus (ZIKV) as well as its unexpected link to infant microcephaly have resulted in serious public health concerns. No antiviral drugs against ZIKV is currently available, and vaccine development is of high priority to prepare for potential ZIKV pandemic. In the present study, a truncated E protein with the N-terminal 90% region reserved (E90) from a contemporary ZIKV strain was cloned and expressed in Escherichia coli, purified by a Ni-NTA column, and characterized by Western blotting assays...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28846484/vaccines-for-emerging-infectious-diseases-lessons-from-mers-coronavirus-and-zika-virus
#16
Joel N Maslow
The past decade and a half has been characterized by numerous emerging infectious diseases. With each new threat, there has been a call for rapid vaccine development. Pathogens such as the Middle East Respiratory Syndrome coronavirus (MERS-CoV) and the Zika virus represent either new viral entities or viruses emergent in new geographic locales and characterized bywith novel complications. Both serve as paradigms for the global spread that can accompany new pathogens. In this paper, we review the epidemiology and pathogenesis of MERS-CoV and Zika virus with respect to vaccine development...
August 28, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28835931/t-cell-responses-in-individuals-infected-with-zika-virus-and-in-those-vaccinated-against-dengue-virus
#17
Dominic Paquin-Proulx, Fabio E Leal, Cassia G Terrassani Silveira, Alvino Maestri, Claudia Brockmeyer, Shannon M Kitchen, Vinicius D Cabido, Esper G Kallas, Douglas F Nixon
BACKGROUND: The outbreak of Zika virus (ZIKV) infection in Brazil has raised concerns that infection during pregnancy could cause microcephaly and other severe neurodevelopmental malformations in the fetus. The mechanisms by which ZIKV causes fetal abnormalities are largely unknown. The importance of pre-infection with dengue virus (DENV), or other flaviviruses endemic to Brazil, remains to be investigated. It has been reported that antibodies directed against DENV can increase ZIKV infectivity by antibody dependent enhancement (ADE), suggesting that a history of prior DENV infection might worsen the outcome of ZIKV infection...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/28835502/cd8-t-cell-immune-response-in-immunocompetent-mice-during-zika-virus-infection
#18
Huarong Huang, Shihua Li, Yongli Zhang, Xiaojuan Han, Baoqian Jia, Hongtao Liu, Dandan Liu, Shuguang Tan, Qihui Wang, Yuhai Bi, William J Liu, Baidong Hou, George Fu Gao, Fuping Zhang
Zika virus (ZIKV) infection cause neurologic complications, including Guillain-Barré syndrome (GBS) in adults and central nerve system (CNS) abnormalities in fetuses. We investigated the immune response, especially CD8(+) T cell response in C57BL/6 (B6) wild type (WT) mouse during ZIKV infection. We found that robust CD8(+) T cell response was elicited, MHC-I restricted CD8(+) T cell epitopes were identified and a tetramer that recognized ZIKV specific CD8(+) T cells was developed. Finally, virus specific memory CD8(+) T cells were generated in these mice...
August 23, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28832434/perceived-facilitators-and-barriers-to-local-health-department-workers-participation-in-infectious-disease-emergency-responses
#19
Lainie Rutkow, Amy Paul, Holly A Taylor, Daniel J Barnett
CONTEXT: Local health departments play a key role in emergency preparedness and respond to a wide range of threats including infectious diseases such as seasonal influenza, tuberculosis, H1N1, Ebola virus disease, and Zika virus disease. To successfully respond to an infectious disease outbreak, local health departments depend upon the participation of their workforce; yet, studies indicate that sizable numbers of workers would not participate in such a response. The reasons why local health department workers participate, or fail to participate, in infectious disease responses are not well understood...
August 21, 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/28821561/zika-virus-activates-de-novo-and-cross-reactive-memory-b-cell-responses-in-dengue-experienced-donors
#20
Thomas F Rogers, Eileen C Goodwin, Bryan Briney, Devin Sok, Nathan Beutler, Alexander Strubel, Rebecca Nedellec, Khoa Le, Michael E Brown, Dennis R Burton, Laura M Walker
Zika virus (ZIKV) shares a high degree of homology with dengue virus (DENV), suggesting that preexisting immunity to DENV could affect immune responses to ZIKV. We have tracked the evolution of ZIKV-induced B cell responses in three DENV-experienced donors. The acute antibody (plasmablast) responses were characterized by relatively high somatic hypermutation and a bias toward DENV binding and neutralization, implying the early activation of DENV clones. A DENV-naïve donor in contrast showed a classical primary plasmablast response...
August 18, 2017: Science Immunology
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