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Advances in Virus Research

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https://www.readbyqxmd.com/read/28057260/a-renaissance-in-nepovirus-research-provides-new-insights-into-their-molecular-interface-with-hosts-and-vectors
#1
REVIEW
M Fuchs, C Schmitt-Keichinger, H Sanfaçon
Nepoviruses supplied seminal landmarks to the historical trail of plant virology. Among the first agriculturally relevant viruses recognized in the late 1920s and among the first plant viruses officially classified in the early 1970s, nepoviruses also comprise the first species for which a soil-borne ectoparasitic nematode vector was identified. Early research on nepoviruses shed light on the genome structure and expression, biological properties of the two genomic RNAs, and mode of transmission. In recent years, research on nepoviruses enjoyed an extraordinary renaissance...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/28057259/modified-vaccinia-virus-ankara-history-value-in-basic-research-and-current-perspectives-for-vaccine-development
#2
REVIEW
A Volz, G Sutter
Safety tested Modified Vaccinia virus Ankara (MVA) is licensed as third-generation vaccine against smallpox and serves as a potent vector system for development of new candidate vaccines against infectious diseases and cancer. Historically, MVA was developed by serial tissue culture passage in primary chicken cells of vaccinia virus strain Ankara, and clinically used to avoid the undesirable side effects of conventional smallpox vaccination. Adapted to growth in avian cells MVA lost the ability to replicate in mammalian hosts and lacks many of the genes orthopoxviruses use to conquer their host (cell) environment...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/28057258/nonsegmented-negative-sense-rna-viruses-structural-data-bring-new-insights-into-nucleocapsid-assembly
#3
REVIEW
M Jamin, F Yabukarski
Viruses with a nonsegmented negative-sense RNA genome (NNVs) include important human pathogens as well as life-threatening zoonotic viruses. These viruses share a common RNA replication complex, including the genomic RNA and three proteins, the nucleoprotein (N), the phosphoprotein (P), and the RNA-dependent RNA polymerase (L). During genome replication, the RNA polymerase complex first synthesizes positive-sense antigenomes, which in turn serve as template for the production of negative-sense progeny genomes...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/28057257/have-nec-coat-will-travel-structural-basis-of-membrane-budding-during-nuclear-egress-in-herpesviruses
#4
REVIEW
J M Bigalke, E E Heldwein
Herpesviruses are unusual among enveloped viruses because they bud twice yet acquire a single envelope. Furthermore, unlike other DNA viruses that replicate in the nucleus, herpesviruses do not exit it by passing through the nuclear pores or by rupturing the nuclear envelope. Instead, herpesviruses have a complex mechanism of nuclear escape whereby nascent capsids bud at the inner nuclear membrane to form perinuclear virions that subsequently fuse with the outer nuclear membrane, releasing capsids into the cytosol...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/28057256/biomedical-and-catalytic-opportunities-of-virus-like-particles-in-nanotechnology
#5
REVIEW
B Schwarz, M Uchida, T Douglas
Within biology, molecules are arranged in hierarchical structures that coordinate and control the many processes that allow for complex organisms to exist. Proteins and other functional macromolecules are often studied outside their natural nanostructural context because it remains difficult to create controlled arrangements of proteins at this size scale. Viruses are elegantly simple nanosystems that exist at the interface of living organisms and nonliving biological machines. Studied and viewed primarily as pathogens to be combatted, viruses have emerged as models of structural efficiency at the nanoscale and have spurred the development of biomimetic nanoparticle systems...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/27712629/preface
#6
EDITORIAL
John Ziebuhr
No abstract text is available yet for this article.
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712628/the-nonstructural-proteins-directing-coronavirus-rna-synthesis-and-processing
#7
REVIEW
E J Snijder, E Decroly, J Ziebuhr
Coronaviruses are animal and human pathogens that can cause lethal zoonotic infections like SARS and MERS. They have polycistronic plus-stranded RNA genomes and belong to the order Nidovirales, a diverse group of viruses for which common ancestry was inferred from the common principles underlying their genome organization and expression, and from the conservation of an array of core replicase domains, including key RNA-synthesizing enzymes. Coronavirus genomes (~26-32 kilobases) are the largest RNA genomes known to date and their expansion was likely enabled by acquiring enzyme functions that counter the commonly high error frequency of viral RNA polymerases...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712627/coronavirus-spike-protein-and-tropism-changes
#8
REVIEW
R J G Hulswit, C A M de Haan, B-J Bosch
Coronaviruses (CoVs) have a remarkable potential to change tropism. This is particularly illustrated over the last 15 years by the emergence of two zoonotic CoVs, the severe acute respiratory syndrome (SARS)- and Middle East respiratory syndrome (MERS)-CoV. Due to their inherent genetic variability, it is inevitable that new cross-species transmission events of these enveloped, positive-stranded RNA viruses will occur. Research into these medical and veterinary important pathogens-sparked by the SARS and MERS outbreaks-revealed important principles of inter- and intraspecies tropism changes...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712626/molecular-basis-of-coronavirus-virulence-and-vaccine-development
#9
REVIEW
L Enjuanes, S Zuñiga, C Castaño-Rodriguez, J Gutierrez-Alvarez, J Canton, I Sola
Virus vaccines have to be immunogenic, sufficiently stable, safe, and suitable to induce long-lasting immunity. To meet these requirements, vaccine studies need to provide a comprehensive understanding of (i) the protective roles of antiviral B and T-cell-mediated immune responses, (ii) the complexity and plasticity of major viral antigens, and (iii) virus molecular biology and pathogenesis. There are many types of vaccines including subunit vaccines, whole-inactivated virus, vectored, and live-attenuated virus vaccines, each of which featuring specific advantages and limitations...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712625/interaction-of-sars-and-mers-coronaviruses-with-the-antiviral-interferon-response
#10
REVIEW
E Kindler, V Thiel, F Weber
Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS) are the most severe coronavirus (CoV)-associated diseases in humans. The causative agents, SARS-CoV and MERS-CoV, are of zoonotic origin but may be transmitted to humans, causing severe and often fatal respiratory disease in their new host. The two coronaviruses are thought to encode an unusually large number of factors that allow them to thrive and replicate in the presence of efficient host defense mechanisms, especially the antiviral interferon system...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712624/feline-coronaviruses-pathogenesis-of-feline-infectious-peritonitis
#11
REVIEW
G Tekes, H-J Thiel
Feline infectious peritonitis (FIP) belongs to the few animal virus diseases in which, in the course of a generally harmless persistent infection, a virus acquires a small number of mutations that fundamentally change its pathogenicity, invariably resulting in a fatal outcome. The causative agent of this deadly disease, feline infectious peritonitis virus (FIPV), arises from feline enteric coronavirus (FECV). The review summarizes our current knowledge of the genome and proteome of feline coronaviruses (FCoVs), focusing on the viral surface (spike) protein S and the five accessory proteins...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712623/viral-and-cellular-mrna-translation-in-coronavirus-infected-cells
#12
REVIEW
K Nakagawa, K G Lokugamage, S Makino
Coronaviruses have large positive-strand RNA genomes that are 5' capped and 3' polyadenylated. The 5'-terminal two-thirds of the genome contain two open reading frames (ORFs), 1a and 1b, that together make up the viral replicase gene and encode two large polyproteins that are processed by viral proteases into 15-16 nonstructural proteins, most of them being involved in viral RNA synthesis. ORFs located in the 3'-terminal one-third of the genome encode structural and accessory proteins and are expressed from a set of 5' leader-containing subgenomic mRNAs that are synthesized by a process called discontinuous transcription...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712622/coronavirus-cis-acting-rna-elements
#13
REVIEW
R Madhugiri, M Fricke, M Marz, J Ziebuhr
Coronaviruses have exceptionally large RNA genomes of approximately 30 kilobases. Genome replication and transcription is mediated by a multisubunit protein complex comprised of more than a dozen virus-encoded proteins. The protein complex is thought to bind specific cis-acting RNA elements primarily located in the 5'- and 3'-terminal genome regions and upstream of the open reading frames located in the 3'-proximal one-third of the genome. Here, we review our current understanding of coronavirus cis-acting RNA elements, focusing on elements required for genome replication and packaging...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27712621/supramolecular-architecture-of-the-coronavirus-particle
#14
REVIEW
B W Neuman, M J Buchmeier
Coronavirus particles serve three fundamentally important functions in infection. The virion provides the means to deliver the viral genome across the plasma membrane of a host cell. The virion is also a means of escape for newly synthesized genomes. Lastly, the virion is a durable vessel that protects the genome on its journey between cells. This review summarizes the available X-ray crystallography, NMR, and cryoelectron microscopy structural data for coronavirus structural proteins, and looks at the role of each of the major structural proteins in virus entry and assembly...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27112283/historical-perspective-what-constitutes-discovery-of-a-new-virus
#15
REVIEW
F A Murphy
A historic review of the discovery of new viruses leads to reminders of traditions that have evolved over 118 years. One such tradition gives credit for the discovery of a virus to the investigator(s) who not only carried out the seminal experiments but also correctly interpreted the findings (within the technological context of the day). Early on, ultrafiltration played a unique role in "proving" that an infectious agent was a virus, as did a failure to find any microscopically visible agent, failure to show replication of the agent in the absence of viable cells, thermolability of the agent, and demonstration of a specific immune response to the agent so as to rule out duplicates and close variants...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27112282/autophagy-and-mammalian-viruses-roles-in-immune-response-viral-replication-and-beyond
#16
REVIEW
P Paul, C Münz
Autophagy is an important cellular catabolic process conserved from yeast to man. Double-membrane vesicles deliver their cargo to the lysosome for degradation. Hence, autophagy is one of the key mechanisms mammalian cells deploy to rid themselves of intracellular pathogens including viruses. However, autophagy serves many more functions during viral infection. First, it regulates the immune response through selective degradation of immune components, thus preventing possibly harmful overactivation and inflammation...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27112281/future-scenarios-for-plant-virus-pathogens-as-climate-change-progresses
#17
REVIEW
R A C Jones
Knowledge of how climate change is likely to influence future virus disease epidemics in cultivated plants and natural vegetation is of great importance to both global food security and natural ecosystems. However, obtaining such knowledge is hampered by the complex effects of climate alterations on the behavior of diverse types of vectors and the ease by which previously unknown viruses can emerge. A review written in 2011 provided a comprehensive analysis of available data on the effects of climate change on virus disease epidemics worldwide...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27112280/cell-to-cell-spread-of-hiv-and-viral-pathogenesis
#18
REVIEW
K M Law, N Satija, A M Esposito, B K Chen
Human immunodeficiency virus type 1 (HIV-1) gives rise to a chronic infection that progressively depletes CD4(+) T lymphocytes. CD4(+) T lymphocytes play a central coordinating role in adaptive cellular and humoral immune responses, and to do so they migrate and interact within lymphoid compartments and at effector sites to mount immune responses. While cell-free virus serves as an excellent prognostic indicator for patient survival, interactions of infected T cells or virus-scavenging immune cells with uninfected T cells can greatly enhance viral spread...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/27112279/peste-des-petits-ruminants-virus
#19
REVIEW
M D Baron, A Diallo, R Lancelot, G Libeau
Peste des petits ruminants virus (PPRV) causes a severe contagious disease of sheep and goats and has spread extensively through the developing world. Because of its disproportionately large impact on the livelihoods of low-income livestock keepers, and the availability of effective vaccines and good diagnostics, the virus is being targeted for global control and eventual eradication. In this review we examine the origin of the virus and its current distribution, and the factors that have led international organizations to conclude that it is eradicable...
2016: Advances in Virus Research
https://www.readbyqxmd.com/read/26997592/structure-and-associated-biological-functions-of-viroids
#20
REVIEW
Gerhard Steger, Jean-Pierre Perreault
Mature viroids consist of a noncoding, covalently closed circular RNA that is able to autonomously infect respective host plants. Thus, they must utilize proteins of the host for most biological functions such as replication, processing, transport, and pathogenesis. Therefore, viroids can be regarded as minimal parasites of the host machinery. They have to present to the host machinery the appropriate signals based on either their sequence or their structure. Here, we summarize such sequence and structural features critical for the biological functions of viroids...
2016: Advances in Virus Research
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