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The considerable number of viral infectious disease threats that have emerged since the beginning of the 21st century have shown the need to dispose global and coordinated responses to fight properly and efficiently against them. Severe acute respiratory syndrome (2003), avian influenza in humans (2005), A(H1N1) pandemic influenza (2009), Middle East respiratory syndrome coronavirus (MERS-CoV) (2012 onward) and Ebola virus disease (2014-2015) are some of the most important examples. The latest emerging and devastating threat was Zika virus, an arbovirus that provoked more than 500,000 suspicious cases in the Americas in 2016 and notable processes of social and medical alarms due to the evidence of a causal link between Zika virus and several congenital injuries, like microcephaly, as well as due to its association with neurological disorders such as Guillain-Barré syndrome in adults (PAHO, 2017). In the framework of this global response and multistrategic approach, the purpose of this Research Topic is to provide updated information and novel researches about control strategies, encompassing virological, entomological and epidemiological data, in order to reach the triad of protagonists of transmission cycles (virus, mosquitoes and humans).
Public Health --- Mosquitoes --- Zika virus --- Arbovirus --- Microcephaly --- Epidemiology --- Flavivirus --- Guillain-Barre Syndrome
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The brain consists of a complex but precisely organized neural network, which provides the structural basis of higher order functions. Such a complex structure originates from a simple pseudostratified neuroepithelium. During the developing mammalian cerebral cortex, a cohort of neural progenitors, located near the ventricle, differentiates into neurons and exhibits multi-step modes of migration toward the pial surface. Tight regulation of neurogenesis and neuronal migration is essential for the determination of the neuron number in adult brains and the proper positioning of excitatory and inhibitory neurons in a specific layer, respectively. In addition, defects in neurogenesis and neuronal migration can cause several neurological disorders, such as microcephaly, periventricular heterotopia and lissencephaly. Recent advances in genetic approaches to study the developing cerebral cortex, as well as the use of a number of novel techniques, particularly in vivo electroporation and time-lapse analyses using explant slice cultures, have significantly increased our understanding of cortical development. These novel techniques have allowed for cell biological analyses of cerebral cortical development in vivo or ex vivo, showing that many cellular events, including endocytosis, cell adhesion, microtubule and actin cytoskeletal regulation, neurotransmitter release, stress response, the consequence of cellular crowding (physical force), dynamics of transcription factors, midbody release and polarity transition are required for neurogenesis and/or neuronal migration. The aim of this research topic is to highlight molecular and cellular mechanisms underlying cerebral cortical development and its related neurological disorders from the cell biological point of views, such as cell division, cell-cycle regulation, cytoskeletal organization, cell adhesion and membrane trafficking. The topic has been organized into three chapters: 1) neurogenesis and cell fate determination, 2) neuronal migration and 3) cortical development-related neurological disorders. We hope that the results and discussions contributed by all authors in this research topic will be broadly useful for further advances in basic research, as well as improvements in the etiology and care of patients suffering from neurological and psychiatric disorders.
Endocytosis --- Cell Cycle --- Periventricular heterotopia --- Lissencephaly --- neuronal migration --- Cell Division --- Cytoskeleton --- Microcephaly --- Neurogenesis --- Cell Adhesion
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In this Special Issue of Viruses, we present original research, reviews and commentaries that contribute to improving our understanding of the viral infection of placenta and fetal cells, or that report on the maternal and fetal outcomes after an emerging viral infection during pregnancy.
Medicine --- Epidemiology & medical statistics --- Zika --- congenital Zika syndrome --- pregnancy --- travelers --- vertical transmission --- fetal growth restriction --- COVID-19 --- coronavirus --- SARS-CoV-2 --- placenta --- transmission --- outcomes --- viruses --- delivery --- perinatal outcomes --- premature birth --- maternal complications --- fetus --- autopsy --- breastfeeding --- vaccine willingness --- HIV --- obesity --- obstetrics --- n/a --- Zika virus --- SHIRPA --- microcephaly --- sequelae --- trimester --- mouse model --- maternal death --- angiotensin-II --- sFlt-1 --- complications --- neonatal health --- vaccination --- angiogenic factors --- endothelial dysfunction --- perinatal --- placental --- brain injury --- fetal movements --- neurosonography --- MRI --- troponin T
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Zika virus (ZIKV) is a mosquito-borne member of the Flaviviridae family that historically has been associated with mild febrile illness. However, the recent outbreaks in Brazil in 2015 and its rapid spread throughout South and Central America and the Caribbean, together with its association with severe neurological disorders—including fetal microcephaly and Guillain-Barré syndrome in adults—have changed the historic perspective of ZIKV. Currently, ZIKV is considered an important public health concern that has the potential to affect millions of people worldwide. The significance of ZIKV in human health and the lack of approved vaccines and/or antiviral drugs to combat ZIKV infection have triggered a global effort to develop effective countermeasures to prevent and/or treat ZIKV infection. In this Special Issue of Viruses, we have assembled a collection of 32 research and review articles that cover the more recent advances on ZIKV molecular biology, replication and transmission, virus–host interactions, pathogenesis, epidemiology, vaccine development, antivirals, and viral diagnosis.
microRNAs --- antivirals --- reverse genetics --- nucleic acid computation --- viral pathogenesis --- plaque reduction neutralization test --- clinical trials --- viral genetic variation --- viral fitness --- pregnancy --- type I IFN antagonist --- prM-E proteins --- eye --- replicon --- antiviral responses --- Bacterial artificial chromosome --- gene expression --- NS1 protein --- viral permissiveness --- ZIKV–host interactions --- reporter virus --- viral persistence --- blood-retinal barrier --- virus like particles --- emerging arbovirus --- Non-human primates --- heme-oxygenase 1 --- mosquito surveillance --- antiviral compounds --- ZIKV-associated neurologic disorders --- external quality assessment --- outbreak control --- therapeutics --- cryptic promoter silencing --- testis --- neurons --- mutagenesis --- RNA-seq --- microsphere immunoassay --- host-directed antivirals --- molecular diagnostics --- Bayesian analyses --- astrocytomas --- Full-length cDNA infectious clones --- viral pathogenicity --- neural progenitor cells --- full-length molecular clone --- antiviral --- multiplex nucleic acid detection --- Asian-lineage --- nucleic acid strand exchange --- IgA --- African-lineage --- vaccines --- Zika --- research models and tools --- immune response --- IgG avidity tests --- polymerase chain reaction --- Asian lineage --- sexual transmission --- TLR7/8 --- neuropathogenesis --- cross-reactions --- genetic variability --- mosquito --- ZIKV --- infectious cDNA --- prostate --- host genetic variation --- monoclonal antibodies --- optimised --- anti-viral immunity --- QCMD --- arbovirus --- FSS13025 --- MR766 --- NS5 --- EQA --- testicular cells --- virus attachment --- flavivirus --- mosquito-borne flavivirus --- dsRNA --- boolean logic-processing nucleic acid probes --- Ziks virus --- viral replication --- Aedes aegypti --- infection --- natural history --- infectious RNA --- zika virus --- chimeric viruses --- subgenomic replicon --- replication --- human brain glial cells --- microglia cells --- hepatocytes --- bacterial artificial chromosome --- detoxification and immune system responses --- testes --- dengue viruses --- Zika virus --- insecticide resistance --- NS2A protein --- plasmid toxicity --- cell surface receptors --- serology --- viral evolution --- laboratory preparedness --- flaviviruses --- Tet-inducible --- dengue virus --- diagnosis --- assay standardization --- infectious clone --- ELISA --- innate response --- congenital Zika syndrome --- secondary infections --- apoptosis --- viral survival --- ocular --- validated --- rhesus macaques --- neuroinflammation --- placenta cells --- NHP --- Zika virus (ZIKV) --- point-of-care diagnostics --- isothermal nucleic acid amplification --- microcephaly --- cytopathic effects --- indirect immunofluorescence --- fetal infection --- therapy --- siRNA --- viral counteraction --- neural cells --- silvestrol --- eIF4A
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