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Hepatitis B infection

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https://www.readbyqxmd.com/read/28531167/a-role-for-the-host-dna-damage-response-in-hepatitis-b-virus-cccdna-formation-and-beyond
#1
REVIEW
Sabrina Schreiner, Michael Nassal
Chronic hepatitis B virus (HBV) infection puts more than 250 million people at a greatly increased risk to develop end-stage liver disease. Like all hepadnaviruses, HBV replicates via protein-primed reverse transcription of a pregenomic (pg) RNA, yielding an unusually structured, viral polymerase-linked relaxed-circular (RC) DNA as genome in infectious particles. Upon infection, RC-DNA is converted into nuclear covalently closed circular (ccc) DNA. Associating with cellular proteins into an episomal minichromosome, cccDNA acts as template for new viral RNAs, ensuring formation of progeny virions...
May 22, 2017: Viruses
https://www.readbyqxmd.com/read/28529542/frequency-and-geographic-distribution-of-tert-promoter-mutations-in-primary-hepatocellular-carcinoma
#2
REVIEW
Francesca Pezzuto, Luigi Buonaguro, Franco M Buonaguro, Maria Lina Tornesello
Primary hepatocellular carcinoma (HCC) mainly develops in subjects chronically infected with hepatitis B (HBV) and C (HCV) viruses through a multistep process characterized by the accumulation of genetic alterations in the human genome. Nucleotide changes in coding regions (i.e. TP53, CTNNB1, ARID1A and ARID2) as well as in non-coding regions (i.e. TERT promoter) are considered cancer drivers for HCC development with variable frequencies in different geographic regions depending on the etiology and environmental factors...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28529116/italian-consensus-guidelines-for-the-management-of-hepatitis-b-virus-infections-in-patients-with-rheumatoid-arthritis
#3
Marco Sebastiani, Fabiola Atzeni, Laura Milazzo, Luca Quartuccio, Carlo Scirè, Giovanni Battista Gaeta, Giovanni Lapadula, Orlando Armignacco, Marcello Tavio, Ignazio Olivieri, Pierluigi Meroni, Laura Bazzichi, Walter Grassi, Alessandro Mathieu, Claudio Mastroianni, Evangelista Sagnelli, Teresa Santantonio, Caterina Uberti Foppa, Massimo Puoti, Loredana Sarmati, Paolo Airò, Oscar Massimiliano Epis, Rossana Scrivo, Miriam Gargiulo, Agostino Riva, Andreina Manfredi, Giovanni Ciancio, Gianguglielmo Zehender, Gloria Taliani, Luca Meroni, Salvatore Sollima, Piercarlo Sarzi-Puttini, Massimo Galli
OBJECTIVES: Hepatitis B (HBV) infection, which is prevalent worldwide, is also frequently seen in patients with rheumatoid arthritis (RA). The Italian Society of Rheumatology (SIR) and the Italian Society of Infectious and Tropical Diseases (SIMIT) endorsed a national consensus process to review the available evidence on HBV management in RA patients and to produce practical, hospital-wide recommendations. METHODS: The consensus panel consisted of infectious disease consultants, rheumatologists and epidemiologists and used the criteria of the Oxford Centre for Evidence-based Medicine to assess the quality of the evidence and the strength of their recommendations...
May 18, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28528961/gp5-of-porcine-reproductive-and-respiratory-syndrome-virus-prrsv-as-a-target-for-homologous-and-broadly-neutralizing-antibodies
#4
REVIEW
Luca N Popescu, Benjamin R Trible, Nanhua Chen, Raymond R R Rowland
Virus neutralization (VN) responses range from narrowly focused antibodies with only homologous neutralizing activity against the virus used for infection, to antibodies that can neutralize both Type 1 and Type 2 viruses, referred to as broadly neutralizing antibody (bnAb). Even though neutralizing epitopes are likely distributed among several structural glycoproteins, this paper focuses on the ectodomain region of GP5 as a model system for investigating the role for neutralizing and non-neutralizing antibodies in protection and disease...
April 29, 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28527666/hepatic-steatosis-progresses-faster-in-hiv-mono-infected-than-hiv-hcv-co-infected-patients-and-is-associated-with-liver-fibrosis
#5
Thomas Pembroke, Marc Deschenes, Bertrand Lebouché, Amine Benmassaoud, Maida Sewitch, Peter Ghali, Philip Wong, Alex Halme, Elise Vuille-Lessard, Costa Pexos, Marina B Klein, Giada Sebastiani
BACKGROUND & AIMS: Hepatic steatosis (HS) seems common in patients infected with human immunodeficiency virus (HIV). However, the relative effect of HIV, as well as hepatitis C virus (HCV) in those co-infected, and the influence of HS on liver fibrosis progression are unclear. METHODS: The LIVEr disease in HIV (LIVEHIV) is a Canadian prospective Cohort using transient elastography and associated controlled attenuation parameter (CAP) to screen for HS and liver fibrosis in unselected HIV-infected adults...
May 17, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28527665/therapeutic-editing-of-hepatocyte-genome-in-vivo
#6
REVIEW
Marina Ruiz de Galarreta, Amaia Lujambio
The recent development of gene editing platforms enables making precise changes in the genome of eukaryotic cells. Programmable nucleases, such as meganucleases, zinc finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and clustered regularly interspaced short palindromic repeat (CRISPR)-associated nucleases, have revolutionized the way research is conducted as they facilitate the rapid production of mutant or knock-out cellular and animal models. These same genetic tools can potentially be applied to cure or alleviate a variety of diseases, including genetic diseases that lack an efficient therapy...
May 17, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28527664/a-new-hdv-mouse-model-identifies-mitochondrial-antiviral-signaling-protein-mavs-as-a-key-player-in-ifn-%C3%AE-induction
#7
Lester Suárez-Amarán, Carla Usai, Marianna Di Scala, Cristina Godoy, Yi Ni, Mirja Hommel, Laura Palomo, Víctor Segura, Cristina Olagüe, Africa Vales, Alicia Ruiz-Ripa, Maria Buti, Eduardo Salido, Jesús Prieto, Stephan Urban, Francisco Rodríguez-Frias, Rafael Aldabe, Gloria González-Aseguinolaza
BACKGROUND & AIMS: Studying hepatitis delta virus (HDV) and developing new treatments is hampered by the limited availability of small animal models. Here a description of a robust mouse model of HDV infection that mimics several important characteristics of the human disease is presented. METHODS: HDV- and HBV-replication competent genomes were delivered to the mouse liver using adeno-associated viruses (AAV) (AAV-HDV and AAV-HBV). Viral load, antigen expression and genomes were quantified at different time points after AAV injection...
May 17, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28526938/reducing-liver-cancer-risk-in-african-born-immigrants-through-culturally-targeted-hepatitis-b-group-education-programs
#8
Kemi Bolutayo, Alexandre Ly van Manh, Noah Cohen, Daouda Ndiaye, Lina Jandorf, Ponni V Perumalswami
Of 900 West African-born immigrants living in New York City who were tested for hepatitis B virus (HBV), over 9% were found to have the infection (Shankar H et al. Clin Infectious Dis 62(S4):S289-s297, 2016). Community targeted group education programs (EP) have been shown to improve immigrant population's health (Bailey E et al. J Natl Med Assoc 92(3):136-42, 2000). Our aim is to enhance HBV screening in at-risk West African immigrants through the development of a group EP as a first critical step to reducing liver cancer risk...
May 19, 2017: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/28526760/tissue-resident-t-cells-in-hepatitis-b-a-new-target-for-cure
#9
Fabian J Bolte, Barbara Rehermann
A hallmark of chronic hepatitis B virus (HBV) infection is the functional impairment and depletion of antiviral T cells. In this issue of JEM, Pallett et al. (https://doi.org/10.1084/jem.20162115) identify a reservoir of functional HBV-specific T cells among liver-resident T cells.
May 19, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28526759/il-2-high-tissue-resident-t-cells-in-the-human-liver-sentinels-for-hepatotropic-infection
#10
Laura J Pallett, Jessica Davies, Emily J Colbeck, Francis Robertson, Navjyot Hansi, Nicholas J W Easom, Alice R Burton, Kerstin A Stegmann, Anna Schurich, Leo Swadling, Upkar S Gill, Victoria Male, TuVinh Luong, Amir Gander, Brian R Davidson, Patrick T F Kennedy, Mala K Maini
The liver provides a tolerogenic immune niche exploited by several highly prevalent pathogens as well as by primary and metastatic tumors. We have sampled healthy and hepatitis B virus (HBV)-infected human livers to probe for a subset of T cells specialized to overcome local constraints and mediate immunity. We characterize a population of T-bet(lo)Eomes(lo)Blimp-1(hi)Hobit(lo) T cells found within the intrahepatic but not the circulating memory CD8 T cell pool expressing liver-homing/retention markers (CD69(+)CD103(+) CXCR6(+)CXCR3(+))...
May 19, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28525625/characteristics-of-us-born-versus-foreign-born-americans-of-african-descent-with-chronic-hepatitis-b
#11
Mohamed A Hassan, W Ray Kim, Ruosha Li, Coleman I Smith, Michael W Fried, Richard K Sterling, Marc G Ghany, Abdus S Wahed, Lilia M Ganova-Raeva, Lewis R Roberts, Anna S F Lok
Hepatitis B virus (HBV) infection is more common in African Americans than in white Americans. We compared the epidemiologic, clinical, and virological characteristics of US-born African Americans (USAAs) to those of foreign-born African Americans (FBAAs) with chronic hepatitis B. The adult cohort study of the Hepatitis B Research Network enrolls patients with HBV infection from 21 clinical sites in the United States and Canada. A total of 237 (15%) of the adult participants with chronic HBV infection that were enrolled from January 20, 2011, to October 2, 2013, were of African descent, including 57 USAAs and 180 FBAAs (76%)...
May 19, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28524366/contrasting-hcv-and-hiv-seroepidemiology-in-11-years-of-blood-donors-screening-in-brazil
#12
J E Levi, S M Lira, C B Bub, M B Polite, C C Terzian, J M Kutner
BACKGROUND: Blood donors are, in principle, healthy individuals who may be revealed as infectious for blood-borne agents by the laboratory screening process, depicting the asymptomatic burden of the disease. Therefore, monitoring hepatitis C virus (HCV)-infected donor and human immunodeficiency virus (HIV)-infected donor and associating to their demographical and behavioural characteristics may shed light on the dynamics and contemporary changes in these viruses' epidemiology. METHODS: Donors presenting repeatedly reactive HCV or HIV serology/nucleic acid testing (NAT) screening results were submitted to confirmatory testing...
May 19, 2017: Transfusion Medicine
https://www.readbyqxmd.com/read/28523056/low-bone-mineral-density-in-chronic-hepatitis-b-virus-infection-a-case-control-study
#13
Zengfa Huang, Hui Wei, Cheng Cheng, Shuhua Yang, Jing Wang, Xianzhe Liu
OBJECTIVE: Osteoporosis is the well-known major complication in chronic hepatitis B virus (HBV) infection. Fewer reports are available of the relationship between bone loss and chronic HBV infection. We investigated the bone mineral density (BMD) and prevalence of osteoporosis in chronic HBV patients in comparison with healthy subjects. METHODS: We assessed 148 chronic HBV patients and 148 age- and gender-matched healthy controls by dual energy X-ray absorptiometry (DEXA) for determination of BMD...
March 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28521828/markov-modeling-in-hepatitis-b-screening-and-linkage-to-care
#14
Martin A Sehr, Kartik D Joshi, John M Fontanesi, Robert J Wong, Robert R Bitmead, Robert G Gish
BACKGROUND: With up to 240 million people chronically infected with hepatitis B worldwide, including an estimated 2 million in the United States, widespread screening is needed to link the infected to care and decrease the possible consequences of untreated infection, including liver cancer, cirrhosis and death. Screening is currently fraught with challenges in both the developed and developing world. New point-of-care tests may have advantages over standard-of-care tests in terms of cost-effectiveness and linkage to care...
May 18, 2017: Theoretical Biology & Medical Modelling
https://www.readbyqxmd.com/read/28521640/antibody-mediated-immunotherapy-against-chronic-hepatitis-b-virus-infection
#15
Ying Gao, Tian-Ying Zhang, Quan Yuan, Ning-Shao Xia
The currently available drugs to treat hepatitis B virus (HBV) infection include interferons and nucleos(t)ide analogues, which can only induce disease remission and are inefficient for the functional cure of patients with chronic HBV infection (CHB). Since high titers of circulating hepatitis B surface antigen (HBsAg) may be essential to exhaust the host anti-HBV immune response and they cannot be significantly reduced by current drugs, new antiviral strategies aiming to suppress serum hepatitis B surface antigen (HBsAg) could help restore virus-specific immune responses and promote the eradication of the virus...
May 19, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28521532/new-antivirals-for-the-treatment-of-chronic-hepatitis-b
#16
Vincent Soriano, Pablo Barreiro, Laura Benitez, Jose M Peña, Carmen de Mendoza
Current treatment with oral nucleos(t)ides entecavir or tenofovir provide sustained suppression of HBV replication and clinical benefit in most chronic hepatitis B virus (HBV) infected persons. However, HBV rebound generally occurs upon drug discontinuation due to persistence of genomic HBV reservoirs as episomic cccDNA and chromosomic integrated HBV-DNA. There is renewed enthusiasm on HBV drug discovery following recent successes with antivirals for hepatitis C and immunotherapies for some cancers. Areas covered: New drugs that target distinct steps of the HBV life cycle are been developed, including inhibitors of viral entry, new polymerase inhibitors, capsid and assembly inhibitors, virus release blockers, and disruptors of cccDNA formation and transcription...
May 18, 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28521452/assessment-of-high-sensitivity-c-reactive-protein-tests-for-the-diagnosis-of-hepatocellular-carcinoma-in-patients-with-hepatitis-b-associated-liver-cirrhosis
#17
Li-Na Ma, Xiao-Yan Liu, Zhen-Hui Lu, Li-Gang Wu, Yuan-Yuan Tang, Xia Luo, Yan-Chao Hu, Ting-Ting Yan, Qi Wang, Xiang-Chun Ding, Yan Xie
Hepatocellular carcinoma (HCC) is a common malignant tumor worldwide, with high morbidity and mortality. Chronic infection with hepatitis B virus (HBV) is a major risk factor for the development of hepatocellular carcinoma and the majority (~80%) of hepatocellular carcinoma patients in China exhibit co-morbidity with HBV-associated liver cirrhosis. The goal of reliable early diagnostic and prognostic techniques for HBV-associated HCC remains unrealized. The aim of the present study was to explore the efficacy of serum high-sensitivity C-reactive protein (hs-CRP) tests in the early diagnosis of HCC in patients with HBV-associated liver cirrhosis...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521446/candidate-mirnas-and-pathogenesis-investigation-for-hepatocellular-carcinoma-based-on-bioinformatics-analysis
#18
Wenbin Ding, Haixia Yang, Shenchu Gong, Weixiang Shi, Jing Xiao, Jinhua Gu, Yilang Wang, Bosheng He
The present study aimed to explore the mechanisms behind the development and progression of hepatocellular carcinoma (HCC) and identify information regarding HCC-related microRNAs (miRNAs) or marker genes for the gene therapy of HCC. Gene expression profile of GSE67882, generated from 4 hepatitis B virus infected HCC tissue samples (HCC group) and 8 chronic hepatitis B tissue samples with no fibrosis (control group) were downloaded from the Gene Expression Omnibus database. The differentially expressed miRNAs functional enrichment and pathway analyses of HCC were revealed, followed by transcription factor-miRNA interaction network construction and analyses...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521211/hepatitis-c-virus-core-antigen-a-simplified-treatment-monitoring-tool-including-for-post-treatment-relapse
#19
François M J Lamoury, Angelica Soker, Danica Martinez, Behzad Hajarizadeh, Evan B Cunningham, Philip Cunningham, Philip Bruggmann, Graham R Foster, Olav Dalgard, Markus Backmund, Brian Conway, Geert Robaeys, Tracy Swan, Gavin Cloherty, Pip Marks, Jason Grebely, Gregory J Dore, Tanya L Applegate
BACKGROUND: Simple, affordable diagnostic tools are essential to facilitate global hepatitis C virus (HCV) elimination efforts. OBJECTIVES: This study evaluated the clinical performance of core antigen (HCVcAg) assay from plasma samples to monitor HCV treatment efficacy and HCV viral recurrence. STUDY DESIGN: Plasma samples from a study of response-guided pegylated-interferon/ribavirin therapy for people who inject drugs with chronic HCV genotype 2/3 infection were assessed for HCV RNA (AmpliPrep/COBAS Taqman assay, Roche) and HCVcAg (ARCHITECT HCV Ag, Abbott Diagnostics) during and after therapy...
May 11, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28520708/hepatitis-b-surface-antigen-screening-among-pregnant-women-and-care-of-infants-of-hepatitis-b-surface-antigen-positive-mothers-guam-2014
#20
Winston E Abara, Susan Cha, Tasneem Malik, Mia S DeSimone, Bernadette Schumann, Esther Mallada, Michael Klemme, Vince Aguon, Anne Marie Santos, Melissa Collier, Mary Kamb
Hepatitis B virus (HBV) infection is endemic among adults in the U.S. territory of Guam (1,2). Perinatal HBV transmission, which occurs at birth from an infected mother to her newborn infant, is a major mode of HBV transmission and maintains HBV endemicity (3). Approximately 90% of HBV-infected infants will develop chronic HBV infection, and approximately 25% of those will die prematurely from liver failure or hepatocellular carcinoma (4,5). Since 1988, the Advisory Committee on Immunization Practices has recommended that all pregnant women be screened for hepatitis B surface antigen (HBsAg), an indicator of HBV infection, and that infants of women who screen positive (HBsAg-positive women) receive postexposure prophylaxis (PEP) (hepatitis B vaccine and hepatitis B immunoglobulin [HBIG])...
May 19, 2017: MMWR. Morbidity and Mortality Weekly Report
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