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https://www.readbyqxmd.com/read/29240922/prevalence-magnitude-and-correlates-of-hiv-1-genital-shedding-in-women-on-antiretroviral-therapy
#1
Caroline C King, Sascha R Ellington, Nicole L Davis, Robert W Coombs, Maria Pyra, Ting Hong, Nelly Mugo, Rena C Patel, Jairam R Lingappa, Jared M Baeten, Athena P Kourtis
Background: Genital human immunodeficiency virus (HIV) RNA shedding can continue despite HIV being undetectable in blood, and can be associated with transmission. Methods: We included African women on antiretroviral therapy (ART). Linear and generalized linear mixed models were used to compare the magnitude and prevalence of genital shedding, respectively, by time since ART initiation. Multivariable logistic regression with generalized estimating equations was used to assess predictors of genital shedding among women with undetectable plasma viral load (VL)...
December 12, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29240565/platelets-to-lymphocyte-ratio-is-a-good-predictor-of-liver-fibrosis-and-insulin-resistance-in-hepatitis-c-virus-related-liver-disease
#2
Ayman Alsebaey, Mostafa Elhelbawy, Imam Waked
BACKGROUND: Hepatitis C virus (HCV) is a global health problem that is complicated by liver fibrosis and insulin resistance (IR). AIM: The aim of this study was to validate neutrophils-to-lymphocytes ratio (NLR) and platelets-to-lymphocytes ratio (PLR) as indirect biomarkers of liver fibrosis and IR in HCV patients. PATIENTS AND METHODS: One hundred and fifty patients were enrolled. Physical examination, BMI, liver function tests, serum creatinine, complete blood count, serum HCV RNA count by PCR, and abdominal ultrasonography were performed...
December 13, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29239484/inactivation-of-middle-east-respiratory-syndrome-coronavirus-in-human-plasma-using-amotosalen-and-ultraviolet-a-light
#3
Salwa I Hindawi, Anwar M Hashem, Ghazi A Damanhouri, Sherif A El-Kafrawy, Ahmed M Tolah, Ahmed M Hassan, Esam I Azhar
BACKGROUND: Middle East respiratory syndrome-coronavirus (MERS-CoV) is a novel zoonotic pathogen. Although the potential for MERS-CoV transmission through blood transfusion is not clear, MERS-CoV was recognized as a pathogen of concern for the safety of the blood supply especially after its detection in whole blood, serum, and plasma of infected individuals. Here we investigated the efficacy of amotosalen and ultraviolet A light (UVA) to inactivate MERS-CoV in fresh-frozen plasma (FFP)...
December 14, 2017: Transfusion
https://www.readbyqxmd.com/read/29239386/viruses-hijack-a-long-non-coding-rna
#4
Nicholas S Heaton, Bryan R Cullen
No abstract text is available yet for this article.
December 14, 2017: Nature
https://www.readbyqxmd.com/read/29239130/establishing-the-cascade-of-care-for-hepatitis-c-in-england-benchmarking-to-monitor-impact-of-direct-acting-antivirals
#5
Ruth Simmons, Georgina Ireland, Will Irving, Matthew Hickman, Caroline Sabin, Samreen Ijaz, Mary Ramsay, Sam Lattimore, Sema Mandal
Little is known about engagement and retention in care of people diagnosed with chronic hepatitis C (HCV) in England. Establishing a cascade of care informs targeted interventions for improving case-finding, referral, treatment uptake and retention in care. Using data from the Sentinel Surveillance of Blood Borne Virus testing (SSBBV) between 2005-2014 we investigate the continuum of care of those tested for HCV in England. Persons ≥1 years old, with an anti-HCV test and subsequent RNA tests between 2005-2014 reported to SSBBV were collated...
December 14, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29239069/the-antiviral-role-of-zinc-and-metallothioneins-in-hepatitis-c-infection
#6
Scott A Read, Grant Parnell, David Booth, Mark W Douglas, Jacob George, Golo Ahlenstiel
Metallothioneins (MTs) are small, cysteine rich proteins characterized by a high affinity for monovalent and divalent cations, such as copper and zinc. Of the four known metallothionein isoforms, only members of the metallothionein 1 and 2 subfamilies are widely expressed, acting as metal chaperones whose primary role is to mediate intracellular zinc homeostasis. Metallothioneins are potently induced by heavy metals and other sources of oxidative stress where they facilitate metal binding and detoxification as well as free radical scavenging...
December 14, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29239006/does-the-mosquito-culex-pipiens-represent-a-potential-vector-of-hepatitis-c-virus
#7
S E El-Kholy, I M El-Husseiny, W S Meshrif, A Abou El-Azm, M L Salem
Infection with hepatitis C virus (HCV) is a public health burden in several countries. Although transmission through blood is the most likely potential route of HCV infection, other sources warrant exploration. This study was designed to examine the possibility that the mosquito Culex pipiens (Diptera: Culicidae) might serve as a vector of HCV. A series of laboratory experiments were conducted in female Cx. pipiens that were fed on blood taken from HCV patients and tested for the presence of HCV RNAs using a reverse transcription polymerase chain reaction technique...
December 14, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/29238357/structural-and-functional-diversity-of-plant-virus-3-cap-independent-translation-enhancers-3-cites
#8
REVIEW
Verónica Truniger, Manuel Miras, Miguel A Aranda
Most of the positive-strand RNA plant viruses lack the 5'-cap and/or the poly(A)-tail that act synergistically to stimulate canonical translation of cellular mRNAs. However, they have RNA elements in the 5'- or 3'-untranslated regions of their RNAs that are required for their cap-independent translation. Cap-independent translation enhancers (CITEs) have been identified in the genomic 3'-end of viruses belonging to the family Tombusviridae and the genus Luteovirus. Seven classes of 3'-CITEs have been described to date based on their different RNA structures...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29238328/impact-of-aerosol-dust-on-xmap-multiplex-detection-of-different-class-pathogens
#9
Denis A Kleymenov, Vladimir A Gushchin, Alexander L Gintsburg, Artem P Tkachuk
Environmental or city-scale bioaerosol surveillance can provide additional value for biodefense and public health. Efficient bioaerosol monitoring should rely on multiplex systems capable of detecting a wide range of biologically hazardous components potentially present in air (bacteria, viruses, toxins and allergens). xMAP technology from LuminexTM allows multiplex bead-based detection of antigens or nucleic acids, but its use for simultaneous detection of different classes of pathogens (bacteria, virus, toxin) is questionable...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29238285/generation-of-an-infectious-clone-of-a-new-korean-isolate-of-apple-chlorotic-leaf-spot-virus-driven-by-dual-35s-and-t7-promoters-in-a-versatile-binary-vector
#10
Ik-Hyun Kim, Jae-Yeong Han, In-Sook Cho, HyeKyoung Ju, Jae Sun Moon, Eun-Young Seo, Hong Gi Kim, John Hammond, Hyoun-Sub Lim
The full-length sequence of a new isolate of Apple chlorotic leaf spot virus (ACLSV) from Korea was divergent, but most closely related to the Japanese isolate A4, at 84% nucleotide identity. The full-length cDNA of the Korean isolate of ACLSV was cloned into a binary vector downstream of the bacteriophage T7 RNA promoter and the Cauliflower mosaic virus 35S promoter. Chenopodium quinoa was successfully infected using in vitro transcripts synthesized using the T7 promoter, detected at 20 days post inoculation (dpi), but did not produce obvious symptoms...
December 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/29237908/lymphoepithelioma-is-a-nonkeratinizing-squamous-cell-carcinoma-with-epstein-barr-virus-infection-in-china
#11
Qiuyan He, Yangying Zhou, Chunyan Fu, Wei Zhu, Jianhua Zhou, Shuang Liu, Yongguang Tao, Desheng Xiao
OBJECTIVE: The objective of this study is to investigate the histogenesis of lymphoepithelial carcinoma (LEC) and its relationship with Epstein-Barr virus (EBV). MATERIALS AND METHODS: The expression of EBV was detected using in situ hybridization, and the CK5/6, p63, and p40 expression levels were detected using immunohistochemistry in 45 paraffin-embedded tissues from LEC. RESULTS: In 45 paraffin-embedded LEC tissues from 10 different samples, the positive CK5/6 signals were located in the cell membrane...
2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/29237844/hsv-1-dna-polymerase-rnase-h-activity-acts-in-a-3-5-direction-and-is-dependent-on-the-3-5-exonuclease-active-site
#12
Jessica L Lawler, Purba Mukherjee, Donald M Coen
The catalytic subunit (Pol) of herpes simplex virus-1 (HSV-1) DNA polymerase has been extensively studied both as a model for other family B DNA polymerases and for its differences from these enzymes as an antiviral target. Among the activities of HSV-1 Pol is an intrinsic RNase H activity that cleaves RNA from RNA:DNA hybrids. There has long been a controversy regarding whether this activity is due to the 3' -5' exonuclease of Pol or whether it is a separate activity, possibly acting on 5' RNA termini. To investigate this issue, we compared wild-type HSV-1 Pol and a 3' -5' exonuclease-deficient mutant, D368A, for DNA polymerase activity, 3' -5' exonuclease activity, and RNase H activity in vitro Additionally, we assessed the RNase H activity using differentially end-labeled templates with 5' or 3' RNA termini...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237842/human-norovirus-ns3-has-rna-helicase-and-chaperoning-activities
#13
Teng-Feng Li, Myra Hosmillo, Hella Schwanke, Ting Shu, Zhaowei Wang, Lei Yin, Stephen Curry, Ian G Goodfellow, Xi Zhou
RNA remodeling proteins, including RNA helicases and chaperones, act to remodel RNA structures and/or protein-RNA interactions, and are required for all processes involving RNAs. Although many viruses encode RNA helicases and chaperones, their in vitro activities and their roles in infected cells largely remain elusive. Noroviruses are a diverse group of positive-stranded RNA viruses in the family Caliciviridae, and constitute a significant and potentially fatal threat to human health. Here we report that protein NS3 encoded by human norovirus has both ATP-dependent RNA helicase activity that unwinds RNA helices and ATP-independent RNA chaperoning activity that can remodel structured RNAs and facilitate strand-annealing...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237839/upon-infection-the-cellular-wd-repeat-containing-protein-5-wdr5-localizes-to-cytoplasmic-inclusion-bodies-and-enhances-measles-virus-replication
#14
Dzwokai Ma, Cyril X George, Jason Nomburg, Christian K Pfaller, Roberto Cattaneo, Charles E Samuel
Replication of negative-strand RNA viruses occurs in association with discrete cytoplasmic foci called inclusion bodies. Whereas inclusion bodies represent a prominent subcellular structure induced by viral infection, our knowledge of the cellular protein components involved in inclusion body formation and function is limited. Using measles virus-infected HeLa cells, we found that the WD repeat-containing protein 5 (WDR5), a subunit of histone H3 lysine 4 methyltransferases, was selectively recruited to virus-induced inclusion bodies...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237838/a-single-amino-acid-substitution-within-the-paramyxovirus-sendai-virus-nucleoprotein-is-a-critical-determinant-for-production-of-ifn-beta-inducing-copyback-type-defective-interfering-genomes
#15
Asuka Yoshida, Ryoko Kawabata, Tomoyuki Honda, Kouji Sakai, Yasushi Ami, Takemasa Sakaguchi, Takashi Irie
One of the first defenses against infecting pathogens is the innate immune system activated by cellular recognition of pathogen-associated molecular patterns (PAMPs). Although virus-derived RNA species, especially copyback (cb)-type defective-interfering (DI) genomes, have been shown to serve as real PAMPs, which strongly induce interferon (IFN)-beta during mononegavirus infection, the mechanisms underlying DI generation remain unclear. Here, for the first time, we identified a single amino acid substitution causing production of cbDI genomes by successful isolation of two distinct types of viral clones with cbDI-producing and cbDI-non-producing phenotypes, from the stock Sendai virus (SeV) strain Cantell, which is widely used in a number of studies on anti-viral innate immunity as a representative IFN-beta-inducing virus...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237836/structure-of-the-paramyxovirus-piv5-nucleoprotein-in-complex-with-an-amino-terminal-peptide-of-the-phosphoprotein
#16
Megha Aggarwal, George P Leser, Christopher A Kors, Robert A Lamb
Parainfluenza virus 5 (PIV5) belongs to the family Paramyxoviridae, which consists of enveloped viruses with a non-segmented negative strand RNA genome encapsidated by the nucleoprotein (N). Paramyxovirus replication is regulated by the phosphoprotein (P) through protein-protein interactions with N and the RNA polymerase (L). The chaperone activity of P is essential to maintain the unassembled RNA-free form of N in order to prevent non-specific RNA binding and premature N oligomerization. Here, we determined the crystal structure of unassembled PIV5 N in complex with a P peptide (N0P) derived from the N-terminus of P (P50) at 2...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237832/the-partitivirus-hetpv13-an1-mediates-severe-growth-debilitation-and-major-alterations-in-the-gene-expression-of-a-fungal-forest-pathogen
#17
Eeva J Vainio, Jaana Jurvansuu, Rafiqul Hyder, Muhammad Kashif, Tuula Piri, Tero Tuomivirta, Anna Poimala, Ping Xu, Salla Mäkelä, Dina Nitisa, Jarkko Hantula
The fungal genus Heterobasidion includes some of the most devastating conifer pathogens in the Boreal forest region. In this study we showed that the alphapartitivirus Heterobasidion partitivirus 13 from H. annosum (HetPV13-an1) is the main causal agent of severe phenotypic debilitation in the host fungus. Based on RNA sequencing using isogenic virus-infected and cured fungal strains, HetPV13-an1 affected the transcription of 683 genes, from which 60% were downregulated and 40% upregulated. Alterations observed in carbohydrate and amino acid metabolism suggest that the virus causes a state of starvation, which is compensated for by alternative synthesis routes...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237829/unexpected-functional-divergence-of-bat-influenza-virus-ns1-proteins
#18
Hannah L Turkington, Mindaugas Juozapaitis, Nikos Tsolakos, Eugenia Corrales-Aguilar, Martin Schwemmle, Benjamin G Hale
Recently, two influenza A virus (FLUAV) genomes were identified in Central and South American bats. These sequences exhibit notable divergence from classical FLUAV counterparts, and functionally, bat FLUAV glycoproteins lack canonical receptor binding and destroying activity. Nevertheless, other features that distinguish these viruses from classical FLUAVs have yet to be explored. Here, we studied the viral non-structural protein, NS1, a virulence factor that modulates host signaling to promote efficient propagation...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237726/transmission-evolution-and-endogenization-lessons-learned-from-recent-retroviral-invasions
#19
REVIEW
Alex D Greenwood, Yasuko Ishida, Sean P O'Brien, Alfred L Roca, Maribeth V Eiden
Viruses of the subfamily Orthoretrovirinae are defined by the ability to reverse transcribe an RNA genome into DNA that integrates into the host cell genome during the intracellular virus life cycle. Exogenous retroviruses (XRVs) are horizontally transmitted between host individuals, with disease outcome depending on interactions between the retrovirus and the host organism. When retroviruses infect germ line cells of the host, they may become endogenous retroviruses (ERVs), which are permanent elements in the host germ line that are subject to vertical transmission...
March 2018: Microbiology and Molecular Biology Reviews: MMBR
https://www.readbyqxmd.com/read/29237469/bat-rabies-surveillance-in-france-first-report-of-unusual-mortality-among-serotine-bats
#20
Evelyne Picard-Meyer, Alexandre Servat, Marine Wasniewski, Matthieu Gaillard, Christophe Borel, Florence Cliquet
BACKGROUND: Rabies is a fatal viral encephalitic disease that is caused by lyssaviruses which can affect all mammals, including human and bats. In Europe, bat rabies cases are attributed to five different lyssavirus species, the majority of rabid bats being attributed to European bat 1 lyssavirus (EBLV-1), circulating mainly in serotine bats (Eptesicus serotinus). In France, rabies in bats is under surveillance since 1989, with 77 positive cases reported between 1989 and 2016. CASE PRESENTATION: In the frame of the bat rabies surveillance, an unusual mortality of serotine bats was reported in 2009 in a village in North-East France...
December 13, 2017: BMC Veterinary Research
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