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https://www.readbyqxmd.com/read/28817197/estimating-seroprevalence-of-herpes-simplex-virus-type-1-among-different-middle-east-and-north-african-male-populations-residing-in-qatar
#1
Gheyath K Nasrallah, Soha R Dargham, Layla I Mohammed, Laith J Abu-Raddad
BACKGROUND: HSV-1 epidemiology in the Middle East and North Africa (MENA) remains poorly understood. Our study aimed to measure HSV-1 antibody prevalence (seroprevalence) and its age-distribution among select MENA populations residing in Qatar. METHODS: Sera were collected from male blood donors attending Hamad Medical Corporation 2013-2015. A total of 2,077 sera were tested for anti-HSV-1 antibodies using HerpeSelect® 1 ELISA IgG kits (Focus Diagnostics, USA)...
August 17, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28802185/diagnostic-yield-and-clinical-impact-of-routine-cell-culture-for-respiratory-viruses-among-children-with-a-negative-multiplex-rt-pcr-result
#2
M AlGhounaim, Y Xiao, C Caya, J Papenburg
BACKGROUND: Polymerase chain reaction (PCR) is the reference standard for respiratory virus testing. However, cell culture may still have added value in identifying viruses not detected by PCR. OBJECTIVES: We aimed to estimate the yield and clinical impact of routine respiratory virus culture among children with a negative PCR result. STUDY DESIGN: A retrospective cohort study was performed from Jan. 2013 to Sept. 2015. Respiratory samples from hospitalized or immunocompromised patients <18years old were routinely inoculated on traditional tube cell culture monolayers if they tested negative by a PCR assay for 12 respiratory viruses...
July 29, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28801835/fabrication-of-acyclovir-loaded-flexible-membrane-vesicles-fmvs-evidence-of-preclinical-efficacy-of-antiviral-activity-in-murine-model-of-cutaneous-hsv-1-infection
#3
Gajanand Sharma, Kanika Thakur, Arvind Setia, Basant Amarji, Mini P Singh, Kaisar Raza, Om Prakash Katare
The present investigation focuses on the development and evaluation of acyclovir-loaded flexible membrane vesicles (ACY-FMVs) and evaluates their targeting potential to localize the drug into skin layers. The drug-loaded FMVs were prepared by thin-film hydration method and characterized for various attributes including micromeritics, entrapment efficiency, vesicle shape, size, and degree of deformability. The values of particle size and zeta potential of the developed carrier system were found to be 453.7 nm and - 11...
August 11, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28801631/rhodoterpenoids-a%C3%A2-c-three-new-rearranged-triterpenoids-from-rhododendron-latoucheae-by-hplc%C3%A2-ms%C3%A2-spe%C3%A2-nmr
#4
Fei Liu, Ya-Nan Wang, Yong Li, Shuang-Gang Ma, Jing Qu, Yun-Bao Liu, Chang-Shan Niu, Zhong-Hai Tang, Tian-Tai Zhang, Yu-Huan Li, Li Li, Shi-Shan Yu
Rhodoterpenoids A‒C (1‒3), three new rearranged triterpenoids, together with one new biogenetically related compound, rhodoterpenoid D (4), were isolated and efficiently elucidated from Rhododendron latoucheae by high-performance liquid chromatography-mass spectrometry-solid-phase extraction-nuclear magnetic resonance (HPLC‒MS‒SPE‒NMR). Compounds 1 and 2 possess an unprecedented skeleton with a 5/7/6/6/6-fused pentacyclic ring system, while compound 3 contains a unique 6/7/6/6/6-fused pentacyclic carbon backbone...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28794045/pseudorabies-virus-dutpase-ul50-induces-lysosomal-degradation-of-type-i-interferon-receptor-1-and-antagonizes-the-alpha-interferon-response
#5
Rui Zhang, Aotian Xu, Chao Qin, Qiong Zhang, Shifan Chen, Yue Lang, Mengdong Wang, Chuang Li, Wenhai Feng, Rui Zhang, Zhengfan Jiang, Jun Tang
Alphaherpesviruses that establish persistent infection partly rely on their ability to evade host anti-viral responses, notably, the type I interferon (IFN) response. However, the mechanisms employed by alphaherpesviruses to avoid this response are not well understood. Pseudorabies virus (PRV) is an economically important pathogen and a useful model system to study alphaherpesvirus biology. To identify PRV proteins that antagonize type I IFN signaling, we performed a screen using an IFN-stimulated response element reporter in the swine cell line CRL...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28794039/the-ul21-tegument-protein-of-herpes-simplex-virus-type-1-is-differentially-required-for-the-syncytial-phenotype
#6
Akua Sarfo, Jason Starkey, Erica Mellinger, Dan Zhang, Pooja Chadha, Jillian Carmichael, John W Wills
The initial goal of this study was to re-examine the requirement of UL21 for herpes simplex virus 1 (HSV-1) replication. Previous studies suggested that UL21 is dispensable for replication in cell cultures, but a recent report on HSV-2 challenges those findings. As was done for the HSV-2 study, a UL21-null virus was made and propagated on complementing cells to discourage selection of compensating mutations. This HSV-1 mutant was able to replicate in non-complementing cells, even at a low MOI, though a reduction in titer was observed...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28783105/viral-ubiquitin-ligase-stimulates-selective-host-microrna-expression-by-targeting-zeb-transcriptional-repressors
#7
Gabriel Lutz, Igor Jurak, Eui Tae Kim, Ju Youn Kim, Michael Hackenberg, Andrew Leader, Michelle L Stoller, Donna M Fekete, Matthew D Weitzman, Donald M Coen, Angus C Wilson
Infection with herpes simplex virus-1 (HSV-1) brings numerous changes in cellular gene expression. Levels of most host mRNAs are reduced, limiting synthesis of host proteins, especially those involved in antiviral defenses. The impact of HSV-1 on host microRNAs (miRNAs), an extensive network of short non-coding RNAs that regulate mRNA stability/translation, remains largely unexplored. Here we show that transcription of the miR-183 cluster (miR-183, miR-96, and miR-182) is selectively induced by HSV-1 during productive infection of primary fibroblasts and neurons...
August 7, 2017: Viruses
https://www.readbyqxmd.com/read/28780467/in-vitro-schistosomicidal-and-antiviral-activities-of-arctium-lappa-l-asteraceae-against-schistosoma-mansoni-and-herpes-simplex-virus-1
#8
Mirna Meana Dias, Ohana Zuza, Lorena R Riani, Priscila de Faria Pinto, Pedro Luiz Silva Pinto, Marcos P Silva, Josué de Moraes, Ana Caroline Z Ataíde, Fernanda de Oliveira Silva, Alzira Batista Cecílio, Ademar A Da Silva Filho
Schistosomiasis and herpes diseases represent serious issues to the healthcare systems, infecting a large number of people worldwide, mainly in developing countries. Arctium lappa L. (Asteraceae), known as "bardana" and "burdock", is a medicinal plant popularly used for several purposes, including as antiseptic. In this study, we evaluated the in vitro schistosomicidal and antiherpes activities of the crude extract of A. lappa, which have not yet been described. Fruits of A. lappa L. were extracted by maceration with ethanol: H2O (96:4 v/v) in order to obtain the hydroalcoholic extract of A...
August 3, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28771693/herpes-simplex-virus-1-interferes-with-autophagy-of-murine-dendritic-cells-and-impairs-their-ability-to-stimulate-cd8-t-lymphocytes
#9
Ramachandramouli Budida, Metodi V Stankov, Katinka Döhner, Anna Buch, Diana Panayotova-Dimitrova, Kim A Tappe, Anja Pohlmann, Beate Sodeik, Georg M N Behrens
The MHC class I presentation is responsible for the presentation of viral proteins to CD8(+) T lymphocytes and mainly depends on the classical antigen processing pathway. Recently, a second pathway involving autophagy has been implicated in this process. Here, we show an increase in the capacity of murine dendritic cells to present viral antigens on MHC class I after infection with a mutant herpes simplex virus 1 (HSV-1-Δ34.5), lacking ICP34.5, when compared to its parental HSV-1 strain. The ICP34.5 protein counteracts host cell translational arrest and suppresses macroautophagy, and the lack of this protein resulted in a low viral protein abundance, which was processed and presented in an efficient way...
August 3, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28768862/crystal-structure-of-the-n-terminal-half-of-the-traffic-controller-ul37-from-herpes-simplex-virus-type-1
#10
Andrea L Koenigsberg, Ekaterina E Heldwein
Inner tegument protein UL37 is conserved among all three subfamilies of herpesviruses. Studies of UL37 homologs from two alphaherpesviruses, Herpes Simplex virus Type 1 (HSV-1) and pseudorabies virus (PRV), have suggested that UL37 plays an essential albeit poorly defined role in intracellular capsid trafficking. At the same time, HSV and PRV homologs cannot be swapped, which suggests that in addition to a conserved function, UL37 homologs may also have divergent virus-specific functions. Accurate dissection of UL37 functions requires detailed maps in the form of atomic-resolution structures...
August 2, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28763890/-oncolytic-property-of-hsv-1-recombinant-viruses-carrying-the-human-il-12
#11
X J Liu, X Y Wang, J X Guo, H J Zhu, C R Zhang, Z H Ma
Objective: Constructed the recombinant HSV-1 deleted ICP47 and inserted human IL-12, and investigate the virus' replication ability and oncolytic property in vitro and vivo. Methods: The recombinant HSV-1 deleting ICP47 (MH1005) and then inserting human IL-12 (MH1006) were obtained with bacterial artificial chromosome technology.The replication ability and the efficiency of inhibiting tumor were detected in several nerve tumor cell lines infected with HSV-wt, MH1005 and MH1006 respectively.The murine tumor model was established by subcutaneous inoculation Neuro-2a cells on both sides of mice back respectively...
July 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28763115/design-synthesis-and-the-biological-evaluation-of-a-new-series-of-acyclic-1-2-3-triazole-nucleosides
#12
Iwona E Głowacka, Graciela Andrei, Dominique Schols, Robert Snoeck, Katarzyna Gawron
A new strategy for the synthesis of N(3) -benzoylated- and N(3) -benzylated N(1) -propargylquinazoline-2,4-diones 30a-d and 31a-d from isatoic anhydride 41 is reported. The alkynes 30a-d and 31a-d were applied in the 1,3-dipolar cycloadditions with azides 27 and 28 to synthesize acyclic 1,2,3-triazole nucleosides. The obtained alkynes and 1,2,3-triazole were evaluated for antiviral activity against a broad range of DNA and RNA viruses. The alkyne 30d showed activity against adenovirus-2 (EC50  = 8.3 μM), while compounds 37a and 37d were also active toward herpes simplex virus-1 wild-type and thymidine kinase deficient (HSV-1 TK(-) ) strains (EC50 values in the range of 4...
August 1, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28760986/pum1-is-a-biphasic-negative-regulator-of-innate-immunity-genes-by-suppressing-lgp2
#13
Yonghong Liu, Linlin Qu, Yuanyuan Liu, Bernard Roizman, Grace Guoying Zhou
PUM1 is an RNA binding protein shown to regulate the stability and function of mRNAs bearing a specific sequence. We report the following: (i) A key function of PUM1 is that of a repressor of key innate immunity genes by repressing the expression of LGP2. Thus, between 12 and 48 hours after transfection of human cells with siPUM1 RNA there was an initial (phase 1) upsurge of transcripts encoding LGP2, CXCL10, IL6, and PKR. This was followed 24 hours later (phase 2) by a significant accumulation of mRNAs encoding RIG-I, SP100, MDA5, IFIT1, PML, STING, and IFNβ...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28760885/the-neonatal-fc-receptor-and-complement-fixation-facilitate-prophylactic-vaccine-mediated-humoral-protection-against-viral-infection-in-the-ocular-mucosa
#14
Derek J Royer, Meghan M Carr, Hem R Gurung, William P Halford, Daniel J J Carr
The capacity of licensed vaccines to protect the ocular surface against infection is limited. Common ocular pathogens, such as HSV-1, are increasingly recognized as major contributors to visual morbidity worldwide. Humoral immunity is an essential correlate of protection against HSV-1 pathogenesis and ocular pathology, yet the ability of Ab to protect against HSV-1 is deemed limited due to the slow IgG diffusion rate in the healthy cornea. We show that a live-attenuated HSV-1 vaccine elicits humoral immune responses that are unparalleled by a glycoprotein subunit vaccine vis-à-vis Ab persistence and host protection...
July 31, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28751779/mir-199a-inhibits-secondary-envelopment-of-herpes-simplex-virus-1-through-the-downregulation-of-cdc42-specific-gtpase-activating-protein-localized-in-golgi-apparatus
#15
Kyousuke Kobayashi, Fumiko Suemasa, Hiroshi Sagara, Shinya Nakamura, Yasushi Ino, Kazuyoshi Kobayashi, Hiroaki Hiramatsu, Takeshi Haraguchi, Kazuo Kurokawa, Tomoki Todo, Akihiko Nakano, Hideo Iba
Because several studies have shown that exogenous miR-199a has antiviral effects against various viruses, including herpesviruses, we examined how miR-199a exerts its antiviral effects using epithelial tumour cell lines infected with herpes simplex virus-1 (HSV-1). We found that both miR-199a-5p and -3p impair the secondary envelopment of HSV-1 by suppressing their common target, ARHGAP21, a Golgi-localized GTPase-activating protein for Cdc42. We further found that the trans-cisternae of the Golgi apparatus are a potential membrane compartment for secondary envelopment...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28748667/a-model-of-genital-herpes-simplex-virus-type-1-infection-in-rhesus-macaques
#16
Meropi Aravantinou, Ines Frank, Geraldine Arrode-Bruses, Moriah Szpara, Brooke Grasperge, James Blanchard, Agegnehu Gettie, Nina Derby, Elena Martinelli
BACKGROUND: Although HSV-2 is the major cause of genital lesions, HSV-1 accounts for half of new cases in developed countries. METHODS: Three healthy SHIV-SF162P3-infected Indian rhesus macaques were inoculated with 4×10(8) pfu of HSV-1 twice, with the second inoculation performed after the vaginal mucosa was gently abraded with a cytobrush. RESULTS: HSV-1 DNA was detected in vaginal swabs 5 days after the second but not the first inoculation in all three macaques...
August 2017: Journal of Medical Primatology
https://www.readbyqxmd.com/read/28743747/the-ul8-subunit-of-the-helicase-primase-complex-of-herpes-simplex-virus-promotes-dna-annealing-and-has-a-high-affinity-for-replication-forks
#17
Oya Bermek, Sandra K Weller, Jack D Griffith
During lytic infection, herpes simplex virus (HSV) DNA is replicated by a mechanism involving DNA recombination. For instance, replication of the HSV-1 genome produces X- and Y-branched structures, reminiscent of recombination intermediates. HSV-1's replication machinery includes a trimeric helicase/primase is composed of helicase (UL5) and primase (UL52) subunits and a third subunit, UL8. UL8 has been reported to stimulate the helicase and primase activities of the complex in the presence of ICP8, an HSV-1 protein that functions as an annealase, a protein that binds complementary single-stranded (ss)DNA and facilitates its annealing to duplex DNA...
July 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28743741/cdk9-and-spt5-are-specifically-required-for-expression-of-herpes-simplex-virus-1-replication-dependent-late-genes
#18
Zhiyuan Zhao, Ka-Wei Tang, Isabella Muylaert, Tore Samuelsson, Per Elias
DNA replication greatly enhances expression of the Herpes simplex virus 1 (HSV-1) γ2 late genes by still unknown mechanisms. Here we demonstrate that 5,6-dichloro-1-β--D-ribofuranosylbenzimidazole (DRB), an inhibitor of CDK9, suppresses expression of γ2 late genes with an IC50 of 5 μM, which is at least ten times lower than the IC50 required for inhibition of expression of early genes. The effect of DRB could not be explained by inhibition of DNA replication per se or loading of RNA polymerase II to late promoters and subsequent reduction of transcription...
July 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28739437/short-term-exercise-training-enhances-cell-mediated-responses-to-hsv-1-vaccine-in-mice
#19
M Molanouri Shamsi, Sh Najedi, Z M Hassan, A Isanejad, M Mahdavi
Exercise (with appropriate intensity and duration) is a natural modulator of immune responses and may be useful to increase the vaccine response towards antigen. According to the fact that rural area responding butter than urbon area to vaccine protocol, this study was undertaken to test the hypothesis that short term exercise training as an adjuvant for antigen such as herpes simplex virus type 1 (HSV-1) in animal models. Mice with/without access to short term exercise training were immunized intramuscularly with inactivated KOS strain of HSV-1...
July 21, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28736976/living-donor-liver-transplantation-for-neonatal-fulminant-hepatitis-due-to-herpes-simplex-virus-infection
#20
Rodrigo Vincenzi, Eduardo A Fonseca, Karina M O Roda, Gilda Porta, Helry L Candido, Marcel R Benavides, Katia R M Leite, Rogerio C Afonso, Plinio Turine-Neto, Cristiane M F Ribeiro, Paulo Chapchap, João Seda-Neto
Although rare, ALF caused by disseminated HSV infection is associated with high mortality in the neonatal population. This condition is often diagnosed relatively late due to the absence of specific signs. We present a case involving a neonate with ALF submitted to living donor liver transplantation without a prior diagnosis. The patient had no skin or mucosal lesions, and IgM serology was negative for HSV-1 and HSV-2. Immunohistochemical staining of the liver explant was positive for herpes virus infection, and the patient subsequently received antiviral drug treatment, with a good outcome...
July 23, 2017: Pediatric Transplantation
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