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https://www.readbyqxmd.com/read/28646802/dampness-can-promote-the-influenza-a-virus-and-worsen-its-prognosis-by-upregulating-the-tlr7-signaling-pathway
#1
Deng Li, Xu Huachong, Pang Peng, Zheng Ke, Nie Jiao, Wu Xianlin, Yu Bin, Chen Jia, Chen Xiaoyin
Context • Outbreaks of the influenza A virus (IAV) are increasingly recognized as a global public health issue, affecting a large proportion of the world's population. A number of studies have provided epidemiologic evidence that dampness and mold are consistently associated with multiple allergic and respiratory effects, but they focused on dampness-related pathogenic microorganisms leading to allergy rather than the dampness itself. Objective • The current study intended to examine the effects of a damp environment on the promotion of the IAV and determine the adverse effects on its prognosis through upregulation of the toll-like receptor 7 (TLR7)-signaling pathway in the lung...
June 23, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28646670/a-metagenomic-assessment-of-viral-contamination-on-fresh-parsley-plants-irrigated-with-fecally-tainted-river-water
#2
X Fernandez-Cassi, N Timoneda, E Gonzales-Gustavson, J F Abril, S Bofill-Mas, R Girones
Microbial food-borne diseases are still frequently reported despite the implementation of microbial quality legislation to improve food safety. Among all the microbial agents, viruses are the most important causative agents of food-borne outbreaks. The development and application of a new generation of sequencing techniques to test for viral contaminants in fresh produce is an unexplored field that allows for the study of the viral populations that might be transmitted by the fecal-oral route through the consumption of contaminated food...
June 21, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28646652/influenza-a-virus-cap-snatches-host-rnas-based-on-their-abundance-early-after-infection
#3
Dorota Sikora, Lynda Rocheleau, Earl G Brown, Martin Pelchat
The influenza A virus RNA polymerase cleaves the 5' ends of host RNAs and uses these RNA fragments as primers for viral mRNA synthesis. We performed deep sequencing of the 5' host-derived ends of the eight viral mRNAs of influenza A/Puerto Rico/8/1934 (H1N1) virus in infected A549 cells, and compared the population to those of A/Hong Kong/1/1968 (H3N2) and A/WSN/1933 (H1N1). In the three strains, the viral RNAs target different populations of host RNAs. Host RNAs are cap-snatched based on their abundance, and we found that RNAs encoding proteins involved in metabolism are overrepresented in the cap-snatched populations...
June 21, 2017: Virology
https://www.readbyqxmd.com/read/28646651/use-of-sequence-independent-single-primer-amplification-sispa-for-rapid-detection-identification-and-characterization-of-avian-rna-viruses
#4
Klaudia Chrzastek, Dong-Hun Lee, Diane Smith, Poonam Sharma, David L Suarez, Mary Pantin-Jackwood, Darrell R Kapczynski
Current technologies with next generation sequencing have revolutionized metagenomics analysis of clinical samples. To achieve the non-selective amplification and recovery of low abundance genetic sequences, a simplified Sequence-Independent, Single-Primer Amplification (SISPA) technique in combination with MiSeq platform was applied to target negative- and positive-sense single-stranded RNA viral sequences. This method allowed successful sequence assembly of full or near full length avian influenza virus (AIV), infectious bronchitis virus (IBV), and Newcastle disease virus (NDV) viral genome...
June 21, 2017: Virology
https://www.readbyqxmd.com/read/28646650/requirement-for-eukaryotic-translation-initiation-factors-in-cap-independent-translation-differs-between-bipartite-genomic-rnas-of-red-clover-necrotic-mosaic-virus
#5
Yuri Tajima, Hiro-Oki Iwakawa, Kiwamu Hyodo, Masanori Kaido, Kazuyuki Mise, Tetsuro Okuno
The bipartite genomic RNAs of red clover necrotic mosaic virus (RCNMV) lack a 5' cap and a 3' poly(A) tail. RNA1 encodes viral replication proteins, and RNA2 encodes a movement protein (MP). These proteins are translated in a cap-independent manner. We previously identified two cis-acting RNA elements that cooperatively recruit eukaryotic translation initiation factor (eIF) complex eIF4F or eIFiso4F to RNA1. Such cis-acting RNA elements and host factors have not been identified in RNA2. Here we found that translation of RNA1 was significantly compromised in Arabidopsis thaliana carrying eif4f mutation...
June 21, 2017: Virology
https://www.readbyqxmd.com/read/28646649/two-single-mutations-in-the-fusion-protein-of-newcastle-disease-virus-confer-hemagglutinin-neuraminidase-independent-fusion-promotion-and-attenuate-the-pathogenicity-in-chickens
#6
Yanhong Ji, Tao Liu, Yane Jia, Bin Liu, Qingzhong Yu, Xiaole Cui, Fengfeng Guo, Huiyun Chang, Qiyun Zhu
The fusion (F) protein of Newcastle disease virus (NDV) affects viral infection and pathogenicity through mediating membrane fusion. Previously, we found NDV with increased fusogenic activity in which contained T458D or G459D mutation in the F protein. Here, we investigated the effects of these two mutations on viral infection, fusogenicity and pathogenicity. Syncytium formation assays indicated that T458D or G459D increased the F protein cleavage activity and enhanced cell fusion with or without the presence of HN protein...
June 21, 2017: Virology
https://www.readbyqxmd.com/read/28646648/natural-history-of-a-viral-cohesive-end-site-cosn-of-the-%C3%AE-like-phages
#7
Nicole Vahanian, Choon Seok Oh, Jean Sippy, Michael Feiss
The base pairs of cosN, the site where the 12 base-long cohesive ends are generated in λ-like phages, show partial-two fold rotational symmetry. In a bioinformatic survey, we found that the cosN changes in 12 natural cosN variants are restricted to bp 6-to-12 of the cohesive end sequence. In contrast, bp 1-5 of the cohesive end sequence are strictly conserved (13/13), as are the two bp flanking the left nicking site (bp -2 and -1). The bp flanking the right nick site (bp 13 and 14) are conserved in 12 of 13 variants...
June 21, 2017: Virology
https://www.readbyqxmd.com/read/28646429/decoupled-side-chain-and-backbone-dynamics-for-proton-translocation-m2-of-influenza-a
#8
Monoj Mon Kalita, Wolfgang B Fischer
The 97 amino acid bitopic membrane protein M2 of influenza A forms a tetrameric bundle in which two of the monomers are covalently linked via a cysteine bridge. In its tetrameric assembly the protein conducts protons across the viral envelope and within intracellular compartments during the infectivity cycle of the virus. A key residue in the translocation of the protons is His-37 which forms a planar tetrad in the configuration of the bundle accepting and translocating the incoming protons from the N terminal side, exterior of the virus, to the C terminal side, inside the virus...
July 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28646370/place-based-predictors-of-hiv-viral-suppression-and-durable-suppression-among-men-who-have-sex-with-men-in-new-york-city
#9
Kevin A Jefferson, Laura S Kersanske, Mary E Wolfe, Sarah L Braunstein, Regine Haardörfer, Don C Des Jarlais, Aimee N C Campbell, Hannah L F Cooper
We explore relationships between place characteristics and HIV viral suppression among HIV-positive men who have sex with men (MSM) in New York City (NYC). We conducted multilevel analyses to examine associations of United Hospital Fund (UHF)-level characteristics to individual-level suppression and durable suppression among MSM. Individual-level independent and dependent variables came from MSM in NYC's HIV surveillance registry who had been diagnosed in 2009-2013 (N = 7159). UHF-level covariates captured demographic composition, economic disadvantage, healthcare access, social disorder, and police stop and frisk rates...
June 23, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28646339/roles-of-non-coding-rnas-in-respiratory-syncytial-virus-rsv-infection
#10
Ralph A Tripp, Abhijeet A Bakre
Analysis of host gene expression profiles following viral infections of target cells/tissues can reveal crucial insights into the host: virus interaction and enables the development of novel therapeutics and prophylactics. Regions of the host genome that do not code for protein, encode structural, and functional non-coding RNAs that are important not only in regulation of host gene expression but also may impact viral replication. This review summarizes the role of host non-coding RNAs during replication of multiple respiratory viruses with a focus on Respiratory Syncytial Virus (RSV), an important pediatric pathogen...
June 24, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28646291/application-of-open-access-databases-to-determine-functional-connectivity-between-resveratrol-binding-protein-qr2-and-colorectal-carcinoma
#11
Barbara B Doonan, Evelien Schaafsma, John T Pinto, Joseph M Wu, Tze-Chen Hsieh
Colorectal cancer (CRC) is a major cause of cancer-associated deaths worldwide. Recently, oral administration of resveratrol (trans-3,5,4'-trihydroxystilbene) has been reported to significantly reduce tumor proliferation in colorectal cancer patients, however, with little specific information on functional connections. The pathogenesis and development of colorectal cancer is a multistep process that can be categorized using three phenotypic pathways, respectively, chromosome instability (CIN), microsatellite instability (MSI), and CpG island methylator (CIMP)...
June 23, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28646236/rapamycin-adjuvant-and-exacerbation-of-severe-influenza-in-an-experimental-mouse-model
#12
Ching-Tai Huang, Chen-Yiu Hung, Tse-Ching Chen, Chun-Yen Lin, Yung-Chang Lin, Chia-Shiang Chang, Yueh-Chia He, Yu-Lin Huang, Avijit Dutta
Influenza virus infection often causes severe disease and acute respiratory distress syndrome. It is a common belief that overwhelming immune response contributes to the severe illness. Physicians and researchers have put forth immune modulation as salvage therapy for better recovery. However, empiric corticosteroid failed in both humans and animal models. Reported success with Rapamycin in humans prompted a comprehensive animal study and mechanistic dissection. Here we report the effect of Rapamycin alone or in combination with Oseltamivir for severe influenza in BALB/c mice...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646219/efficient-and-unbiased-metagenomic-recovery-of-rna-virus-genomes-from-human-plasma-samples
#13
Carmen F Manso, David F Bibby, Jean L Mbisa
RNA viruses cause significant human pathology and are responsible for the majority of emerging zoonoses. Mainstream diagnostic assays are challenged by their intrinsic diversity, leading to false negatives and incomplete characterisation. New sequencing techniques are expanding our ability to agnostically interrogate nucleic acids within diverse sample types, but in the clinical setting are limited by overwhelming host material and ultra-low target frequency. Through selective host RNA depletion and compensatory protocol adjustments for ultra-low RNA inputs, we are able to detect three major blood-borne RNA viruses - HIV, HCV and HEV...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646196/nucleoside-reverse-transcriptase-inhibitors-nrtis-induce-proinflammatory-cytokines-in-the-cns-via-wnt5a-signaling
#14
Ting Wu, Juan Zhang, Mingxing Geng, Shao-Jun Tang, Wenping Zhang, Jianhong Shu
HAART is very effective in suppressing HIV-1 replication in patients. However, patients staying on long-term HAART still develop various HIV-associated neurological disorders, even when the viral load is low. The underlying pathogenic mechanisms are largely unknown. Emerging evidence implicated that persistent neuroinflammation plays an important role in NeuroAIDS. Although residual virus or viral proteins are commonly thought as the causal factors, we are interested in the alternative possibility that HAART critically contributes to the neuroinflammation in the central nervous system (CNS)...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646195/structural-alteration-of-a-bydv-like-translation-element-bte-that-attenuates-p35-expression-in-three-mild-tobacco-bushy-top-virus-isolates
#15
Deya Wang, Chengming Yu, Shanshan Liu, Guolu Wang, Kerong Shi, Xiangdong Li, Xuefeng Yuan
To identify the molecular effects of Tobacco bushy top virus (TBTV) evolution on the degeneration of tobacco bushy top disease, three TBTV isolates with mild virulence were compared with wild-type TBTV to assess the translation of p35, which relies on a BYDV-like translation element (BTE) in a cap-independent manner. The in vitro expression of p35 in the mild isolates was only 20% to 40% of the expression observed in wt TBTV. Based on translation data from chimeric TBTV RNA, low-level p35 expression in the three mild isolates was associated with two regions: the 5' terminal 500 nt region (RI) and the 3' internal region (RV), which included the BTE...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646187/microrna-148-as-a-negative-regulator-of-the-common-tlr-adaptor-mediates-inflammatory-response-in-teleost-fish
#16
Qing Chu, Yunhang Gao, Dekun Bi, Tianjun Xu
MicroRNAs are small endogenous noncoding RNAs implicating in the regulation of diverse biological processes, including proliferation, differentiation, cancer, apoptosis, and viral infections. MicroRNAs regulate gene expression by either mRNA degradation or inhibition of protein translation. Although microRNAs have emerged as important controller involved in regulation of inflammatory response, the microRNA-mediated regulatory mechanism remains less clear in teleost. Here, we report that miR-148 targets MyD88 and down-regulates its expression by inhibition protein translation rather than degradation mRNA in miiuy croaker...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646142/efficacy-and-safety-of-tenofovir-disoproxil-fumarate-in-preventing-vertical-transmission-of-hepatitis-b-in-pregnancies-with-high-viral-load
#17
Jun-Ze Chen, Zuo-Wei Liao, Fei-Long Huang, Ru-Kui Su, Wen-Bo Wang, Xue-Yuan Cheng, Jie-Qing Chen, Jia-Qi Liu, Zhong Huang
This study was a meta-analysis of the literature on the efficacy and safety of tenofovir disoproxil fumarate (TDF) in preventing vertical transmission of hepatitis B in pregnancies with high viral load. Four observational studies and one randomized controlled trial involving 585 pregnant women and 595 newborns were included in the meta-analysis. TDF was more effective than the placebo in reducing vertical transmission in HBeAg-positive chronic hepatitis B (CHB) pregnancies with high serum HBV-DNA levels (OR = 0...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646141/human-sialidase-neu3-is-s-acylated-and-behaves-like-an-integral-membrane-protein
#18
Macarena Rodriguez-Walker, Jose L Daniotti
Membrane-bound sialidase Neu3 is involved in the catabolism of glycoconjugates, and plays crucial roles in numerous biological processes. Since the mechanism of its association with membranes is still not completely understood, the aim of this work was to provide further information regarding this aspect. Human Neu3 was found to be associated with the plasma membrane and endomembranes, and it was not released from the lipid bilayer under conditions that typically release peripheral membrane proteins. By different experimental approaches, we demonstrated that its C-terminus is exposed to the cytosol while another portion of the protein is exposed to the extracellular space, suggesting that Neu3 possesses the features of a transmembrane protein...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646038/aging-impairs-alveolar-macrophage-phagocytosis-and-increases-influenza-induced-mortality-in-mice
#19
Christine K Wong, Candice A Smith, Koji Sakamoto, Naftali Kaminski, Jonathan L Koff, Daniel R Goldstein
Influenza viral infections often lead to increased mortality in older people. However, the mechanisms by which aging impacts immunity to influenza lung infection remain unclear. We employed a murine model of influenza infection to identify these mechanisms. With aging, we found reduced numbers of alveolar macrophages, cells essential for lung homeostasis. We also determined that these macrophages are critical for influenza-induced mortality with aging. Furthermore, aging vastly alters the transcriptional profile and specifically downregulates cell cycling pathways in alveolar macrophages...
June 23, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28645973/effect-of-ultrasonography-surveillance-in-patients-with-liver-cancer-a-population-based-longitudinal-study
#20
Jui-Kun Chiang, Lin Chih-Wen, Yee-Hsin Kao
OBJECTIVE: Liver cancer is a growing global public health problem. Ultrasonography is an imaging tool widely used for the early diagnosis of liver cancer. However, the effect of ultrasonography surveillance (US) on the survival of patients with liver cancer is unknown. Therefore, this study examined the association between survival and US frequency during the 2 years preceding patients' liver cancer diagnosis. METHODS: This population-based longitudinal study was conducted in Taiwan, a region with high liver cancer incidence, by using the National Health Insurance Research Database...
June 23, 2017: BMJ Open
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