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https://www.readbyqxmd.com/read/29231870/improving-the-care-and-treatment-of-monkeypox-patients-in-low-resource-settings-applying-evidence-from-contemporary-biomedical-and-smallpox-biodefense-research
#1
REVIEW
Mary G Reynolds, Andrea M McCollum, Beatrice Nguete, Robert Shongo Lushima, Brett W Petersen
Monkeypox is a smallpox-like illness that can be accompanied by a range of significant medical complications. To date there are no standard or optimized guidelines for the clinical management of monkeypox (MPX) patients, particularly in low-resource settings. Consequently, patients can experience protracted illness and poor outcomes. Improving care necessitates developing a better understanding of the range of clinical manifestations-including complications and sequelae-as well as of features of illness that may be predictive of illness severity and poor outcomes...
December 12, 2017: Viruses
https://www.readbyqxmd.com/read/29215570/host-cell-restriction-factors-that-limit-influenza-a-infection
#2
REVIEW
Fernando Villalón-Letelier, Andrew G Brooks, Philippa M Saunders, Sarah L Londrigan, Patrick C Reading
Viral infection of different cell types induces a unique spectrum of host defence genes, including interferon-stimulated genes (ISGs) and genes encoding other proteins with antiviral potential. Although hundreds of ISGs have been described, the vast majority have not been functionally characterised. Cellular proteins with putative antiviral activity (hereafter referred to as "restriction factors") can target various steps in the virus life-cycle. In the context of influenza virus infection, restriction factors have been described that target virus entry, genomic replication, translation and virus release...
December 7, 2017: Viruses
https://www.readbyqxmd.com/read/29215552/two-distinct-clinical-courses-of-human-cowpox-germany-2015
#3
Ines Eder, Patrick Vollmar, Martin Pfeffer, Philipp Naether, Arne Christian Rodloff, Hermann Meyer
Here we present two cases of human infection with cowpox virus with distinct clinical courses. A series of clinical photographs documents lesion progression over time. In the first case-an unvaccinated young veterinary assistant-a pustule was treated locally with cortisone. The lesion turned into a large ulcer accompanied by severe lymphadenitis. Based on her close contact to a sick stray cat, infection with cowpox virus was assumed and confirmed by virus isolation, PCR, and serology. The clinical course took up to eleven months until healing of the wound was complete...
December 7, 2017: Viruses
https://www.readbyqxmd.com/read/29211035/high-resolution-structure-analysis-of-antibody-v5-and-u4-conformational-epitopes-on-human-papillomavirus-16
#4
Jian Guan, Stephanie M Bywaters, Sarah A Brendle, Robert E Ashley, Alexander M Makhov, James F Conway, Neil D Christensen, Susan Hafenstein
Cancers attributable to human papillomavirus (HPV) place a huge burden on the health of both men and women. The current commercial vaccines are genotype specific and provide little therapeutic benefit to patients with existing HPV infections. Identifying the conformational epitopes on the virus capsid supports the development of improved recombinant vaccines to maximize long-term protection against multiple types of HPV. Fragments of antibody (Fab) digested from the neutralizing monoclonal antibodies H16.V5 (V5) and H16...
December 6, 2017: Viruses
https://www.readbyqxmd.com/read/29206186/genomic-characterisation-of-vinegar-hill-virus-an-australian-nairovirus-isolated-in-1983-from-argas-robertsi-ticks-collected-from-cattle-egrets
#5
Penelope J Gauci, Jane McAllister, Ian R Mitchell, Daisy Cybinski, Toby St George, Aneta J Gubala
This report describes the near complete genomic sequence and subsequent analysis of Vinegar Hill virus (VINHV; tentative member of the genus Orthonairovirus, family Nairoviridae, order Bunyavirales). VINHV is the second nairovirus reported to be isolated on mainland Australia and the first to be sequenced and analysed. Our genetic analysis shows that VINHV belongs to the Dera Ghazi Khan genogroup, a group of viruses previously isolated in other parts of the world including Asia, South Africa, and the USA. We discuss possible routes of entry for nairoviruses into Australia and the need to understand the virome of Australian ticks in the context of new and emerging disease...
December 5, 2017: Viruses
https://www.readbyqxmd.com/read/29207540/herpesvirus-and-autophagy-all-right-everybody-be-cool-this-is-a-robbery
#6
REVIEW
Marion Lussignol, Audrey Esclatine
Autophagy is an essential vacuolar process of the cell, leading to lysosomal degradation and recycling of proteins and organelles, which is extremely important in maintaining homeostasis. Multiple roles have been now associated with autophagy, in particular a pro-survival role in nutrient starvation or in stressful environments, a role in life span extension, in development, or in innate and adaptive immunity. This cellular process can also take over microorganisms or viral proteins inside autophagosomes and degrade them directly in autolysosomes and is then called xenophagy and virophagy, respectively...
December 4, 2017: Viruses
https://www.readbyqxmd.com/read/29207524/characterization-of-a-novel-bat-adenovirus-isolated-from-straw-colored-fruit-bat-eidolon-helvum
#7
Hirohito Ogawa, Masahiro Kajihara, Naganori Nao, Asako Shigeno, Daisuke Fujikura, Bernard M Hang'ombe, Aaron S Mweene, Alisheke Mutemwa, David Squarre, Masao Yamada, Hideaki Higashi, Hirofumi Sawa, Ayato Takada
Bats are important reservoirs for emerging zoonotic viruses. For extensive surveys of potential pathogens in straw-colored fruit bats (Eidolon helvum) in Zambia, a total of 107 spleen samples of E. helvum in 2006 were inoculated onto Vero E6 cells. The cell culture inoculated with one of the samples (ZFB06-106) exhibited remarkable cytopathic changes. Based on the ultrastructural property in negative staining and cross-reactivity in immunofluorescence assays, the virus was suspected to be an adenovirus, and tentatively named E...
December 4, 2017: Viruses
https://www.readbyqxmd.com/read/29207511/subcellular-trafficking-of-the-papillomavirus-genome-during-initial-infection-the-remarkable-abilities-of-minor-capsid-protein-l2
#8
REVIEW
Samuel K Campos
Since 2012, our understanding of human papillomavirus (HPV) subcellular trafficking has undergone a drastic paradigm shift. Work from multiple laboratories has revealed that HPV has evolved a unique means to deliver its viral genome (vDNA) to the cell nucleus, relying on myriad host cell proteins and processes. The major breakthrough finding from these recent endeavors has been the realization of L2-dependent utilization of cellular sorting factors for the retrograde transport of vDNA away from degradative endo/lysosomal compartments to the Golgi, prior to mitosis-dependent nuclear accumulation of L2/vDNA...
December 3, 2017: Viruses
https://www.readbyqxmd.com/read/29207494/an-opportunistic-pathogen-afforded-ample-opportunities-middle-east-respiratory-syndrome-coronavirus
#9
REVIEW
Ian M Mackay, Katherine E Arden
The human coronaviruses (CoV) include HCoV-229E, HCoV-OC43, HCoV-NL63, and HCoV-HKU1, some of which have been known for decades. The severe acute respiratory syndrome (SARS) CoV briefly emerged into the human population but was controlled. In 2012, another novel severely human pathogenic CoV-the Middle East Respiratory Syndrome (MERS)-CoV-was identified in the Kingdom of Saudi Arabia; 80% of over 2000 human cases have been recorded over five years. Targeted research remains key to developing control strategies for MERS-CoV, a cause of mild illness in its camel reservoir...
December 2, 2017: Viruses
https://www.readbyqxmd.com/read/29194430/human-cytomegalovirus-encoded-mir-us25-1-5p-attenuates-cd147-emmprin-mediated-early-antiviral-response
#10
Jun Chen, Sisi Xia, Xiangmin Yang, Huizi Chen, Fanni Li, Fenyong Liu, Zhinan Chen
Cellular receptor-mediated signaling pathways play critical roles during the initial immune response to Human Cytomegalovirus (HCMV) infection. However, the involvement of type-I transmembrane glycoprotein CD147/EMMPRIN (extracellular matrix metalloproteinase inducer) in the antiviral response to HCMV infection is still unknown. Here, we demonstrated the specific knockdown of CD147 significantly decreased HCMV-induced activation of NF-κB and Interferon-beta (IFN-β), which contribute to the cellular antiviral responses...
December 1, 2017: Viruses
https://www.readbyqxmd.com/read/29194419/the-interplay-between-natural-killer-cells-and-human-herpesvirus-6
#11
REVIEW
Eva Eliassen, Dario Di Luca, Roberta Rizzo, Isabel Barao
Human Herpesvirus 6 (HHV-6) is a set of two closely related herpes viruses known as HHV-6A and HHV-6B. Both are lymphotropic viruses that establish latency in the host. The ability to evade the immune responses of effector cells is likely a major factor contributing to the development of a persistent HHV-6A/B (collectively termed HHV-6) infection. Natural killer (NK) cells are lymphocytes that, along with neutrophils and monocytes/macrophages, participate in the critical innate immune response during viral infections, but can also mediate the antigen-specific memory responses generally associated with adaptive immunity...
December 1, 2017: Viruses
https://www.readbyqxmd.com/read/29194359/chikungunya-virus-pathophysiology-mechanism-and-modeling
#12
REVIEW
Vaishnavi K Ganesan, Bin Duan, St Patrick Reid
Chikungunya virus (CHIKV), a mosquito-transmitted alphavirus, is recurring in epidemic waves. In the past decade and a half, the disease has resurged in several countries around the globe, with outbreaks becoming increasingly severe. Though CHIKV was first isolated in 1952, there remain significant gaps in knowledge of CHIKV biology, pathogenesis, transmission, and mechanism. Diagnosis is largely simplified and based on symptoms, while treatment is supportive rather than curative. Here we present an overview of the disease, the challenges that lie ahead for future research, and what directions current studies are headed towards, with emphasis on improvement of current animal models and potential use of 3D models...
December 1, 2017: Viruses
https://www.readbyqxmd.com/read/29194355/characterization-of-the-ebv-induced-persistent-dna-damage-response
#13
Amy Y Hafez, Micah A Luftig
Epstein-Barr virus (EBV) is an oncogenic herpesvirus that is ubiquitous in the human population. Early after EBV infection in vitro, primary human B cells undergo a transient period of hyper-proliferation, which results in replicative stress and DNA damage, activation of the DNA damage response (DDR) pathway and, ultimately, senescence. In this study, we investigated DDR-mediated senescence in early arrested EBV-infected B cells and characterized the establishment of persistent DNA damage foci. We found that arrested EBV-infected B cells exhibited an increase in promyelocytic leukemia nuclear bodies (PML NBs), which predominantly localized to markers of DNA damage, as well as telomeric DNA...
December 1, 2017: Viruses
https://www.readbyqxmd.com/read/29186061/identification-of-alpha-and-beta-coronavirus-in-wildlife-species-in-france-bats-rodents-rabbits-and-hedgehogs
#14
Elodie Monchatre-Leroy, Franck Boué, Jean-Marc Boucher, Camille Renault, François Moutou, Meriadeg Ar Gouilh, Gérald Umhang
Coronaviruses are closely monitored in the context of emerging diseases and, as illustrated with Severe Acute Respiratory Syndrome coronavirus (SARS-CoV) and Middle East Respiratory Syndrome-coronavirus (MERS-CoV), are known to cross the species barrier and eventually to move from wildlife to humans. Knowledge of the diversity of coronaviruses in wildlife is therefore essential to better understand and prevent emergence events. This study explored the presence of coronaviruses in four wild mammal orders in France: Bats, rodents, lagomorphs, and hedgehogs...
November 29, 2017: Viruses
https://www.readbyqxmd.com/read/29182537/dynamics-of-pathological-and-virological-findings-during-experimental-calpox-virus-infection-of-common-marmosets-callithrix-jacchus
#15
Anne Schmitt, Li Lin Gan, Ahmed Abd El Wahed, Tingchuan Shi, Heinz Ellerbrok, Franz-Josef Kaup, Christiane Stahl-Hennig, Kerstin Mätz-Rensing
Experimental intranasal infection of marmosets (Callithrix jacchus) with calpox virus results in fatal disease. Route and dose used for viral inoculation of the test animals mimics the natural transmission of smallpox, thus representing a suitable model to study pathogenesis and to evaluate new vaccines against orthopoxvirus infection. However, the pathogenic mechanisms leading to death are still unclear. Therefore, our study aimed at investigating the kinetics of pathological alterations to clarify the pathogenesis in calpox virus infection...
November 28, 2017: Viruses
https://www.readbyqxmd.com/read/29186900/rodent-papillomaviruses
#16
REVIEW
Aayushi Uberoi, Paul F Lambert
Preclinical infection model systems are extremely valuable tools to aid in our understanding of Human Papillomavirus (HPV) biology, disease progression, prevention, and treatments. In this context, rodent papillomaviruses and their respective infection models are useful tools but remain underutilized resources in the field of papillomavirus biology. Two rodent papillomaviruses, MnPV1, which infects the Mastomys species of multimammate rats, and MmuPV1, which infects laboratory mice, are currently the most studied rodent PVs...
November 27, 2017: Viruses
https://www.readbyqxmd.com/read/29186875/distribution-and-inferred-evolutionary-characteristics-of-a-chimeric-ssdna-virus-associated-with-intertidal-marine-isopods
#17
Kalia S I Bistolas, Ryan M Besemer, Lars G Rudstam, Ian Hewson
Aquatic invertebrates are common reservoirs of a rapidly expanding group of circular Rep-encoding ssDNA (CRESS-DNA) viruses. This study identified and explored the phylogenetic relationship between novel CRESS-DNA viral genotypes associated with Pacific intertidal isopods Idotea wosnesenskii, Idotea resecata, and Gnorimosphaeroma oregonensis. One genotype associated with I. wosnesenskii, IWaV278, shared sequence similarity and genomic features with Tombusviridae (ssRNA) and Circoviridae (ssDNA) genomes and was putatively assigned to the Cruciviridae clade comprising chimeric viruses...
November 26, 2017: Viruses
https://www.readbyqxmd.com/read/29186842/cfa-mir-143-promotes-apoptosis-via-the-p53-pathway-in-canine-influenza-virus-h3n2-infected-cells
#18
Pei Zhou, Liqing Tu, Xi Lin, Xiangqi Hao, Qingxu Zheng, Weijie Zeng, Xin Zhang, Yun Zheng, Lifang Wang, Shoujun Li
MicroRNAs regulate multiple aspects of the host response to viral infection. This study verified that the expression of cfa-miR-143 was upregulated in vivo and in vitro by canine influenza virus (CIV) H3N2 infection. To understand the role of cfa-miR-143 in CIV-infected cells, the target gene of cfa-miR-143 was identified and assessed for correlations with proteins involved in the apoptosis pathway. A dual luciferase reporter assay showed that cfa-miR-143 targets insulin-like growth factor binding protein 5 (Igfbp5)...
November 25, 2017: Viruses
https://www.readbyqxmd.com/read/29186781/the-heterologous-expression-of-the-p22-rna-silencing-suppressor-of-the-crinivirus-tomato-chlorosis-virus-from-tobacco-rattle-virus-and-potato-virus-x-enhances-disease-severity-but-does-not-complement-suppressor-defective-mutant-viruses
#19
(no author information available yet)
To counteract host antiviral RNA silencing, plant viruses express suppressor proteins that function as pathogenicity enhancers. The genome of the Tomato chlorosis virus (ToCV) (genus Crinivirus, family Closteroviridae) encodes an RNA silencing suppressor, the protein p22, that has been described as having one of the longest lasting local suppressor activities when assayed in Nicotiana benthamiana. Since suppression of RNA silencing and the ability to enhance disease severity are closely associated, we analyzed the effect of expressing p22 in heterologous viral contexts...
November 24, 2017: Viruses
https://www.readbyqxmd.com/read/29186766/autophagy-in-measles-virus-infection
#20
REVIEW
(no author information available yet)
Autophagy is a biological process that helps cells to recycle obsolete cellular components and which greatly contributes to maintaining cellular integrity in response to environmental stress factors. Autophagy is also among the first lines of cellular defense against invading microorganisms, including viruses. The autophagic destruction of invading pathogens, a process referred to as xenophagy, involves cytosolic autophagy receptors, such as p62/SQSTM1 (Sequestosome 1) or NDP52/CALCOCO2 (Nuclear Dot 52 KDa Protein/Calcium Binding And Coiled-Coil Domain 2), which bind to microbial components and target them towards growing autophagosomes for degradation...
November 24, 2017: Viruses
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