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Hepatitis E virus

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https://www.readbyqxmd.com/read/28110375/hepatitis-e-virus-genotype-4-sequences-detected-in-sewage-from-treatment-plants-of-china
#1
Heng Li, Wei Li, Ruiping She, Liang Yu, Qiaoxing Wu, Jingling Yang, Fengjiao Hu, Majid Hussain Soomro, Ruihan Shi, Wenzhuo Hao, Yue Zhao, Jingjing Mao
The aim of this study was to investigate the occurrence of hepatitis E virus (HEV) in sewage samples in Shen Zhen, China. Sewage samples were collected from 152 sewage plants including livestock sewage, domestic sewage and treated sewage from May to July of 2015. Two of 152 samples were HEV positive (1.32%) from the livestock sewage plants. Partial ORF2 fragments of HEV were sequenced and a phylogenetic tree was constructed using MEGA5.1. Blast and phylogenetic analyses showed that both of these two sequences belonged to HEV Genotype 4...
January 21, 2017: Food and Environmental Virology
https://www.readbyqxmd.com/read/28107601/predictors-of-liver-histological-changes-and-a-sustained-response-to-peginterferon-among-chronic-hepatitis-b-e-antigen-positive-patients-with-normal-or-minimally-elevated-alanine-aminotransferase-levels
#2
Jie Chen, Cheng-Run Xu, Min Xi, Wei-Wei Hu, Zheng-Hao Tang, Guo-Qing Zhang
BACKGROUND: A proportion of chronic hepatitis B (CHB) patients with normal or only minimally elevated ALT levels display significant histologic changes, and would benefit from antiviral therapy. OBJECTIVES: We aim to evaluate the histologic abnormalities seen in these patients, and then determine which of them would most likely respond to peginterferon therapy. METHODS: One hundred and thirteen hepatitis B e antigen (HBeAg)-positive patients with a normal or minimally elevated ALT level and moderate to severe histologic changes in their liver tissue were selected to receive peginterferon monotherapy and participate in a followup analysis...
January 20, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28107585/treatment-and-primary-prevention-in-people-who-inject-drugs-for-chronic-hepatitis-c-infection-is-elimination-possible-in-a-high-prevalence-setting
#3
I Gountas, V Sypsa, O Anagnostou, N K Martin, P Vickerman, E Kafetzopoulos, A Hatzakis
AIMS: To project the impact of scaling up oral antiviral therapy and harm reduction on chronic hepatitis C (CHC) prevalence and incidence among people who inject drugs (PWID) in Greece, to estimate the relationship between required treatment levels and expansion of harm reduction programs to achieve specific targets and to examine whether hepatitis C viruse (HCV) elimination among PWID is possible in this high prevalence setting. DESIGN: A dynamic discrete time, stochastic individual-based model was developed to simulate HCV transmission among PWID incorporating the effect of HCV treatment and harm reduction strategies, and allowing for reinfection following treatment...
January 20, 2017: Addiction
https://www.readbyqxmd.com/read/28106751/synthesis-of-some-new-pyridazine-derivatives-for-anti-hav-evaluation
#4
Eman M Flefel, Waled A Tantawy, Walaa I El-Sofany, Mahmoud El-Shahat, Ahmed A El-Sayed, Dina N Abd-Elshafy
4-(2-(4-Halophenyl)hydrazinyl)-6-phenylpyridazin-3(2H)-ones 1a,b were prepared and treated with phosphorus oxychloride, phosphorus pentasulphide and ethyl chloroformate to give the corresponding chloropyridazine, pyridazinethione, oxazolopyridazine derivatives 2-4, respectively. Compound 2 reacted with hydrazine hydrate to afford hydrazinylpyridazine 7. The reaction of 4-(2-(4-chlorophenyl)hydrazinyl)-3-hydrazinyl-6-phenylpyridazine (7) with acetic anhydride, p-chlorobenzaldehyde and carbon disulphide gave the corresponding pyridazinotriazine derivatives 8-10...
January 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28106531/preclinical-characterization-of-the-novel-hcv-ns3-protease-inhibitor-gs-9256
#5
Huiling Yang, Chris Yang, Yujin Wang, Gerry Rhodes, Margaret Robinson, Guofeng Cheng, Xiaoping Qi, Hongmei Mo, Yang Tian, Rowchanak Pakdaman, X Christopher Sheng, Choung U Kim, William E Delaney
BACKGROUND: GS-9256 is an inhibitor of hepatitis C virus (HCV) NS3 protease with a macrocyclic structure and novel phosphinic acid pharmacophore. METHODS: Key preclinical properties of GS-9256 including in vitro antiviral activity, cross-resistance, and pharmacokinetic properties were investigated in non-human species. RESULTS: In genotype (GT) 1b Huh-luc cells with a replicon encoding luciferase, GS-9256 had a mean EC50 value of 20.0 nM, with minimal cytotoxicity...
January 20, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28105258/efficacy-and-safety-of-tenofovir-in-chronic-hepatitis-b-australian-real-world-experience
#6
Grace C Lovett, Tin Nguyen, David M Iser, Jacinta A Holmes, Robert Chen, Barbara Demediuk, Gideon Shaw, Sally J Bell, Paul V Desmond, Alexander J Thompson
AIM: To evaluate the long-term treatment outcomes of tenofovir therapy in patients in a real world Australian tertiary care setting. METHODS: We performed a retrospective analysis of treatment outcomes among treatment-naïve and treatment-experienced patients receiving a minimum 3 mo tenofovir therapy through St Vincent's Hospital Melbourne, Australia. We included patients receiving tenofovir [tenofovir disoproxil fumarate (TDF)] monotherapy, as well as patients treated with TDF in combination with a second antiviral agent...
January 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28102520/us-fda-perspective-on-elbasvir-grazoprevir-treatment-for-patients-with-chronic-hepatitis-c-virus-genotype-1-or-4-infection
#7
Sarita D Boyd, LaRee Tracy, Takashi E Komatsu, Patrick R Harrington, Prabha Viswanathan, Jeff Murray, Adam Sherwat
Elbasvir/grazoprevir demonstrated high sustained virologic response rates 12 weeks after the end of treatment (SVR12) across five clinical trials in subjects infected with chronic hepatitis C virus (HCV) genotype 1, including those with advanced chronic kidney disease (CKD), and GT4. Despite favorable results overall, the US Food and Drug Administration (FDA) encountered challenging regulatory issues due to the limitations of clinical trial data in certain subpopulations. In GT1a-infected subjects, baseline NS5A resistance-associated polymorphisms emerged as the strongest baseline characteristic associated with diminished SVR12 rates following 12 weeks of elbasvir/grazoprevir treatment...
January 19, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28100286/disease-burden-of-hepatitis-e-in-a-rural-population-in-china-a-community-based-survey
#8
H Jiang, S Huang, Y Zhao, Y Wang, C Yang, J Cai, Z Wang, J Zhang, X Zhang, H Jin
This study aimed to estimate the disease burden of hepatitis E in a rural region in China. A total of 489 hepatitis E cases were reported according to a community-based survey in an active hepatitis surveillance system between 2008 and 2015, the questionnaire and record-review methods were constructed to evaluate the economic and health burden of hepatitis E virus infections from societal perspectives. All costs were converted to US$ in 2015. The age-standardized cumulative incidence rate was 107·9/100 000, and the median age-standardized annual incidence rate was 16·5/100 000...
January 19, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28100012/characterization-and-management-of-patients-with-heroin-versus-non-heroin-opioid-overdoses-experience-at-an-academic-medical-center
#9
Kate M Morizio, Regan A Baum, Adam Dugan, Julia E Marin, Abby M Bailey
STUDY OBJECTIVES: To characterize the differences between patients who had heroin and non-heroin opioid overdoses and to determine whether there were any significant differences in their management with regard to the naloxone use. DESIGN: Retrospective cohort study. SETTING: Large, academic medical center. PATIENTS: A total of 923 patients admitted to the medical center who were identified for overdose by heroin or other opiate-related narcotics between January 2010 and September 2015; 480 patients experienced a non-heroin opioid overdose event, and 443 patients experienced a heroin overdose event...
January 18, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28098552/hepatitis-e-virus-infection-in-solid-organ-transplant-recipients-france
#10
Sebastien Lhomme, Laurent Bardiaux, Florence Abravanel, Pierre Gallian, Nassim Kamar, Jacques Izopet
The rate of transfusion-transmitted hepatitis E virus (HEV) in transplant recipients is unknown. We identified 60 HEV-positive solid organ transplant patients and retrospectively assessed their blood transfusions for HEV. Seven of 60 patients received transfusions; 3 received HEV-positive blood products. Transfusion is not the major route of infection in this population.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28098527/changing-epidemiology-of-hepatitis-a-and-hepatitis-e-viruses-in-china-1990-2014
#11
Xiang Ren, Peng Wu, Liping Wang, Mengjie Geng, Lingjia Zeng, Jun Zhang, Ningshao Xia, Shengjie Lai, Harry R Dalton, Benjamin J Cowling, Hongjie Yu
We compared the epidemiology of hepatitis A and hepatitis E cases in China from 1990-2014 to better inform policy and prevention efforts. The incidence of hepatitis A cases declined dramatically, while hepatitis E incidence increased. During 2004-2014, hepatitis E mortality rates surpassed those of hepatitis A.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28096411/hepatitis-e-virus-orf3-is-a-functional-ion-channel-required-for-release-of-infectious-particles
#12
Qiang Ding, Brigitte Heller, Juan M V Capuccino, Bokai Song, Ila Nimgaonkar, Gabriela Hrebikova, Jorge E Contreras, Alexander Ploss
Hepatitis E virus (HEV) is the leading cause of enterically transmitted viral hepatitis globally. Of HEV's three ORFs, the function of ORF3 has remained elusive. Here, we demonstrate that via homophilic interactions ORF3 forms multimeric complexes associated with intracellular endoplasmic reticulum (ER)-derived membranes. HEV ORF3 shares several structural features with class I viroporins, and the function of HEV ORF3 can be maintained by replacing it with the well-characterized viroporin influenza A virus (IAV) matrix-2 protein...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095508/the-smc5-6-complex-restricts-hbv-when-localized-to-nd10-without-inducing-an-innate-immune-response-and-is-counteracted-by-the-hbv-x-protein-shortly-after-infection
#13
Congrong Niu, Christine M Livingston, Li Li, Rudolf K Beran, Stephane Daffis, Dhivya Ramakrishnan, Dara Burdette, Leanne Peiser, Eduardo Salas, Hilario Ramos, Mei Yu, Guofeng Cheng, Michel Strubin, William E Delaney Iv, Simon P Fletcher
The structural maintenance of chromosome 5/6 complex (Smc5/6) is a restriction factor that represses hepatitis B virus (HBV) transcription. HBV counters this restriction by expressing HBV X protein (HBx), which targets Smc5/6 for degradation. However, the mechanism by which Smc5/6 suppresses HBV transcription and how HBx is initially expressed is not known. In this study we characterized viral kinetics and the host response during HBV infection of primary human hepatocytes (PHH) to address these unresolved questions...
2017: PloS One
https://www.readbyqxmd.com/read/28093535/hepatitis-e-in-singapore-a-case-series-and-viral-phylodynamics-study
#14
Esmeralda Chi-Yuan Teo, Boon-Huan Tan, Michael A Purdy, Pui-San Wong, Pei-Jun Ting, Pik-Eu Jason Chang, Lynette Lin-Ean Oon, Amanda Sue, Chong-Gee Teo, Chee-Kiat Tan
The incidence of hepatitis E in Singapore appears to be increasing. A retrospective case-series study of patients diagnosed with hepatitis E in a tertiary hospital from 2009 to 2013 was conducted. Of 16 cases, eight (50%) were solid-organ transplant recipients (SOTRs), and 14 (88%) were found infected by genotype 3 hepatitis E virus (HEV-3). Bayesian inferences based on HEV subgenomic sequences from seven cases suggest that HEV-3 strains were introduced to Singapore as two principal lineages. Within limitations of the study, it can be inferred that one lineage, in the 3efg clade, emerged about 83 years ago, probably originating from Japan, whereas the other, in the 3abchij clade, emerged about 40 years ago, from the United States...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093483/treatment-simplification-to-atazanavir-ritonavir%C3%A2-%C3%A2-lamivudine-versus-maintenance-of-atazanavir-ritonavir%C3%A2-%C3%A2-two-nrtis-in-virologically-suppressed-hiv-1-infected-patients-48-week-results-from-a-randomized-trial-atlas-m
#15
Simona Di Giambenedetto, Massimiliano Fabbiani, Eugenia Quiros Roldan, Alessandra Latini, Gabriella D'Ettorre, Andrea Antinori, Antonella Castagna, Giancarlo Orofino, Daniela Francisci, Pierangelo Chinello, Giordano Madeddu, Pierfrancesco Grima, Stefano Rusconi, Massimo Di Pietro, Annalisa Mondi, Nicoletta Ciccarelli, Alberto Borghetti, Emanuele Focà, Manuela Colafigli, Andrea De Luca, Roberto Cauda
BACKGROUND: Combination ART (cART)-related toxicities and costs have prompted the need for treatment simplification. The ATLAS-M trial explored 48 week non-inferior efficacy of simplification to atazanavir/ritonavir  +  lamivudine versus maintaining three-drug atazanavir/ritonavir-based cART in virologically suppressed patients. METHODS: We performed an open-label, multicentre, randomized, non-inferiority study, enrolling HIV-infected adults on atazanavir/ritonavir + two NRTIs, with stable HIV-RNA <50 copies/mL and CD4 + >200 cells/mm(3) Main exclusion criteria were hepatitis B virus coinfection, past virological failure on or resistance to study drugs, recent AIDS and pregnancy...
January 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28093123/synthesis-of-stable-isotopically-labeled-peptides-with-filter-assisted-enzymatic-labeling-for-the-diagnosis-of-hepatitis-b-virus-infection-utilizing-mass-spectrometry-based-proteomics-strategy
#16
Hsing-Fen Tsai, He-Hsuan Hsiao
A facile method for the preparation of stable isotopically labeled peptides was developed by means of filter-assisted tryptic (16)O/(18)O water labeling, which could be directly applied to the determination of hepatitis B virus infection from human serum with tandem mass spectrometry. Tryptic peptides of hepatitis B surface antigen or hepatitis B e antigen from different subtypes of hepatitis B virus were synthesized with traditional solid-phase peptide synthesis as potential biomarkers. Trypsin catalyzed oxygen-18 exchange at their amidated c-terminus of arginine or lysine residue...
March 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28089613/high-frequency-of-hepatitis-e-virus-infection-in-swine-from-south-brazil-and-close-similarity-to-human-hev-isolates
#17
Ana Maria Passos-Castilho, Celso Francisco Hernandes Granato
Hepatitis E virus is responsible for acute and chronic liver infections worldwide. Swine hepatitis E virus has been isolated in Brazil, and a probable zoonotic transmission has been described, although data are still scarce. The aim of this study was to investigate the frequency of hepatitis E virus infection in pigs from a small-scale farm in the rural area of Paraná State, South Brazil. Fecal samples were collected from 170 pigs and screened for hepatitis E virus RNA using a duplex real-time RT-PCR targeting a highly conserved 70nt long sequence within overlapping parts of ORF2 and ORF3 as well as a 113nt sequence of ORF2...
January 3, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28089593/physician-knowledge-and-attitudes-about-hepatitis-a-and-current-practices-regarding-hepatitis-a-vaccination-delivery
#18
Noele P Nelson, Mandy Allison, Megan C Lindley, Michaela Brtnikova, Lori A Crane, Brenda L Beaty, Laura P Hurley, Allison Kempe
OBJECTIVES: To assess physicians' 1) knowledge and attitudes about hepatitis A disease and HepA vaccine, and 2) child care and school HepA vaccine mandates; 3) practices related to HepA vaccine delivery; 4) factors associated with strongly recommending HepA vaccine to all 1-2 year olds; and 5) feasibility of implementing HepA catch-up vaccination at health maintenance visits. METHODS: A national survey was conducted among representative networks of pediatricians and family medicine physicians (FMs) from March to June, 2014 by e-mail or mail based on provider preference...
January 9, 2017: Academic Pediatrics
https://www.readbyqxmd.com/read/28088502/the-nucleotide-changes-within-hbv-core-promoter-precore-during-the-first-12weeks-of-nucleos-t-ide-treatment-might-be-associated-with-a-better-virological-response
#19
Yaqin Peng, Yutang Li, Jinlin Hou, Jian Sun, Mingze Su, Yao Li, Kuanhui Xiang, Ling Yan, Hui Zhuang, Tong Li
OBJECTIVES: We aimed to study the dynamic changes of hepatitis B virus (HBV) core promoter/precore (CP/preC) sequences during antiviral treatment and their associations with virological responses. MATERIALS AND METHODS: The baseline and 12-week CP/preC sequences (nts 1655-2014) were obtained from 52 chronic hepatitis B patients with positive hepatitis B e antigen (HBeAg), who received a 104-week lamivudine and adefovir dipivoxil combination therapy. The mutations within the CP/preC were analyzed against genotype specific reference sequences...
January 12, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28088354/uncovering-oxysterol-binding-protein-osbp-as-a-target-of-the-anti-enteroviral-compound-ttp-8307
#20
Lucian Albulescu, Joëlle Bigay, Bishyajit Biswas, Marion Weber-Boyvat, Cristina M Dorobantu, Leen Delang, Hilde M van der Schaar, Young-Sik Jung, Johan Neyts, Vesa M Olkkonen, Frank J M van Kuppeveld, Jeroen R P M Strating
The genus Enterovirus (e.g. poliovirus, coxsackievirus, rhinovirus) of the Picornaviridae family of positive-strand RNA viruses includes many important pathogens linked to a range of acute and chronic diseases for which no approved antiviral therapy is available. Targeting a step in the life cycle that is highly conserved provides an attractive strategy for developing broad-range inhibitors of enterovirus infection. A step that is currently explored as a target for the development of antivirals is the formation of replication organelles, which support replication of the viral genome...
January 11, 2017: Antiviral Research
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