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https://www.readbyqxmd.com/read/29353073/serum-hbv-dna-plus-rna-shows-superiority-in-reflecting-the-activity-of-intrahepatic-cccdna-in-treatment-na%C3%A3-ve-hbv-infected-individuals
#1
Hongxin Huang, Jie Wang, Weijie Li, Ran Chen, Xiangmei Chen, Fengmin Zhang, Dongping Xu, Fengmin Lu
BACKGROUND: Both serum hepatitis B virus (HBV) DNA and RNA can reflect intrahepatic covalently closed circular DNA (cccDNA) activity. However, correlations among viral markers haven't been fully explored. OBJECTIVES: Here we investigated the correlations between serum HBV RNA and other viral markers in acute hepatitis B patients and treatment-naïve chronic HBV-infected individuals. STUDY DESIGN: The serum viral markers of 19 acute hepatitis B patients and 84 treatment-naïve chronic HBV-infected individuals at different infection stages were quantified...
January 6, 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29325291/-hepatitis-b-core-antigen-promotes-invasion-of-hepatocellular-carcinoma-cell-line-hepg2-2-15-via-toll-like-receptor-4
#2
H R Hou, Y Kang, Y K Li, Y L Zeng, J F Wei, G G Ding, Z Peng, J Shang
Objective: To investigate the effect of hepatitis B core antigen (HBcAg) in promoting the invasion of hepatitis B virus (HBV)-related hepatocellular carcinoma cell line HepG2.2.15 and the role of Toll-like receptor 4 (TLR4) in the mechanism. Methods: TLR4 mRNA and protein expression in HepG2 cells and HepG2.2.15 cells was measured by reverse transcription real-time PCR and Western blot analysis, respectively. HepG2.2.15 cells were transfected with TLR4 specific small interfering RNA (siRNA) to silence TLR4 expression, and stimulated by recombinant HBcAg in culture...
December 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29321313/tip60-complex-inhibits-hbv-transcription
#3
Hironori Nishitsuji, Saneyuki Ujino, Keisuke Harada, Kunitada Shimotohno
Hepatitis B virus (HBV) is a global major health problem with over one million deaths annually caused by chronic liver damage. Understanding host factors that modulate HBV replication may aid the development of anti-HBV therapies. Our recent genome-wide small interfering RNA screen using recombinant HBV demonstrated that TIP60 inhibited HBV infection. Here, we show that TIP60 complex contributes to anti-HBV defense. The TIP60 complex bound to the HBV promoter and suppressed HBV transcription driven by the precore/core promoter...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29317776/non-coding-rnas-in-hepatocellular-carcinoma-molecular-functions-and-pathological-implications
#4
REVIEW
Chun-Ming Wong, Felice Ho-Ching Tsang, Irene Oi-Lin Ng
Hepatocellular carcinoma (HCC) is a leading lethal malignancy worldwide. However, the molecular mechanisms underlying liver carcinogenesis remain poorly understood. Over the past two decades, overwhelming evidence has demonstrated the regulatory roles of different classes of non-coding RNAs (ncRNAs) in liver carcinogenesis related to a number of aetiologies, including HBV, HCV and NAFLD. Among the ncRNAs, microRNAs, which belong to a distinct class of small ncRNAs, have been proven to play a crucial role in the post-transcriptional regulation of gene expression...
January 10, 2018: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29287028/hbv-or-hcv-coinfection-in-hiv-1-infected-pregnant-women-in-france-prevalence-and-pregnancy-outcomes
#5
Valérie Benhammou, Roland Tubiana, Sophie Matheron, Pierre Sellier, Laurent Mandelbrot, Jérôme LE Chenadec, Emmanuelle Marel, Babak Khoshnood, Josiane Warszawski
BACKGROUND: Chronic HBV or HCV infection is frequent in HIV- infected persons but their impact on pregnant HIV-infected women is understudied. We explored whether these coinfections are associated with adverse pregnancy outcomes and lower response to antiretroviral therapy (ART). METHODS: Pregnancies in HIV-1-infected women included in the ANRS French Perinatal Cohort between 2005 and 2013 were analyzed if HBV and HCV infection statuses were available. RESULTS: Among 4236 women, the prevalence of HBV (HBs Ag+) and HCV (RNA+) were 6...
December 27, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29285141/interferon-%C3%AE-inhibits-cell-migration-and-invasion-and-induces-the-expression-of-antiviral-proteins-in-huh-7-cells-transfected-with-hepatitis-b-virus-x-gene-expressing-lentivirus
#6
Qian Yang, Xiao-Peng Li, Yuan-Bin Zhong, Tian-Xin Xiang, Lun-Li Zhang
Hepatitis B virus (HBV) X protein (HBx) serves an important role in HBV infection and the development of HBV-related liver cancer. Interferon-α (IFN-α) is used to treat patients with HBV; however, the role of IFN-α in the development of HBV-related liver cancer remains unclear. The present study established a new HBV-related liver cancer model (Huh-7-HBx) by transfecting the hepatoma cell line Huh-7, with HBx-expressing lentivirus. Following IFN-α treatment, cell viability, migration and invasion, as well as the expression of antiviral proteins in Huh-7-HBx, were subsequently determined...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29260742/-overexpression-of-dna-methyltransferases-in-persistency-of-cccdna-pool-in-chronic-hepatitis-b
#7
D S Kostyushev, A P Zueva, S A Brezgin, A D Lipatnikov, V N Simirskii, D Glebe, E V Volchkova, G A Shipulin, V P Chulanov
AIM: To define the role of DNA-methyltransferases of type 1 and type 3A in hepatitis B viral cycle. MATERIAL AND METHODS: Human hepatoma cells HepG2 with stable expression of 1.1-mer HBV genome were transfected with vectors encoding DNA-methyltransferase 1 (DNMT1), DNA-methyltransferase 3A (DNMT3A) or were co-transfected with these vectors. Total HBV DNA copy number, relative expression of pregenomic RNA (pgRNA), S-protein-encoding RNA (S-RNA) and cccDNA were analyzed by quantitative and semi-quantitative real-time PCR-analysis with TaqMan probes for assessment of DNMTs-mediated effects on HBV...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/29260740/-hepatitis-c-can-be-cured-will-hepatitis-b-become-next
#8
V P Chulanov, A P Zueva, D S Kostyushev, S A Brezgin, E V Volchkova, V V Maleyev
Chronic hepatitis B (CHB) and C (CHC) are one of the leading causes of cirrhosis and liver cancer with over a million of people dying annually from their consequences. In Russia CHB and CHC morbidity and related mortality show an upward trend. As a result of recent breakthroughs in antiviral therapeutics CHC became a curable disease. Modern therapeutics effectively suppress viral replication in CHB patients, but withdrawal of antivirals usually results in disease relapse. Loss of HBsAg required for the so called 'functional cure' is a very rare event...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/29250788/sensitivity-and-specificity-of-a-new-automated-system-for-the-detection-of-hepatitis-b-virus-hepatitis-c-virus-and-human-immunodeficiency-virus-nucleic-acid-in-blood-and-plasma-donations
#9
Susan A Galel, Toby L Simon, Phillip C Williamson, James P AuBuchon, Dan A Waxman, Yasuko Erickson, Rasa Bertuzis, John R Duncan, Khushbeer Malhotra, Jeffrey Vaks, Nancy Huynh, Lisa Lee Pate
BACKGROUND: Use of nucleic acid testing (NAT) in donor infectious disease screening improves transfusion safety. Advances in NAT technology include improvements in assay sensitivity and system automation, and real-time viral target discrimination in multiplex assays. This article describes the sensitivity and specificity of cobas MPX, a multiplex assay for detection of human immunodeficiency virus (HIV)-1 Group M, HIV-2 and HIV-1 Group O RNA, HCV RNA, and HBV DNA, for use on the cobas 6800/8800 Systems...
December 17, 2017: Transfusion
https://www.readbyqxmd.com/read/29249466/prevalence-and-risk-factors-of-hepatitis-b-and-c-among-hemodialysis-patients-in-tunisia
#10
S Mhalla, R Hammoud, A Frih, Y Kadri, A El Argoubi, M Elmay, M Mastouri
OBJECTIVE: Hemodialysis patients are at increased risk of infection by hepatitis C and B viruses, which are significant causes of mortality and morbidity. Prevention of their transmission in hemodialysis units remains a challenge worldwide. We aimed to investigate the prevalence of these two infections and to explore major risk factors among patients on chronic hemodialysis. MATERIALS AND METHODS: We performed a cross-sectional study of 109 hemodialysis patients (mean duration of hemodialysis of seven years) between 2012 and 2014 in a Teaching Hospital of Monastir, Tunisia...
December 14, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/29247725/toll-like-receptor-7-agonist-gs-9620-induces-prolonged-inhibition-of-hbv-via-a-type-i-interferon-dependent-mechanism
#11
Congrong Niu, Li Li, Stephane Daffis, Julie Lucifora, Marc Bonnin, Sarah Maadadi, Eduardo Salas, Ruth Chu, Hilario Ramos, Christine M Livingston, Rudolf K Beran, Abhishek V Garg, Scott Balsitis, David Durantel, Fabien Zoulim, William E Delaney, Simon P Fletcher
BACKGROUND & AIMS: GS-9620, an oral agonist of toll-like receptor 7 (TLR7), is in clinical development for the treatment of chronic hepatitis B (CHB). GS-9620 was previously shown to induce prolonged suppression of serum viral DNA and antigens in the woodchuck and chimpanzee models of CHB. Here we investigated the molecular mechanisms that contribute to the antiviral response to GS-9620 using in vitro models of hepatitis B virus (HBV) infection. METHODS: Cryopreserved primary human hepatocytes (PHH) and differentiated HepaRG (dHepaRG) cells were infected with HBV and treated with GS-9620, conditioned media from human peripheral blood mononuclear cells (PBMCs) treated with GS-9620 (GS-9620 conditioned media; GS-9620-CM), or other innate immune stimuli...
December 13, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/29247724/anti-hbv-response-to-toll-like-receptor-7-agonist-gs-9620-is-associated-with-intrahepatic-aggregates-of-t-cells-and-b-cells
#12
Li Li, Vivian Barry, Stephane Daffis, Congrong Niu, Erik Huntzicker, Dorothy M French, Igor Mikaelian, Robert E Lanford, William E Delaney, Simon P Fletcher
BACKGROUND & AIMS: GS-9620, an oral agonist of toll-like receptor 7 (TLR7), is in clinical development for the treatment of chronic hepatitis B (CHB). GS-9620 was previously shown to induced prolonged suppression of serum viral DNA and antigens in the chimpanzee and woodchuck models of CHB. Here we investigated the immunomodulatory mechanisms underlying these antiviral effects. METHODS: Archived liver biopsies and paired PBMC samples from a previous chimpanzee study were analyzed by RNA-Seq, qRT-PCR, immunohistochemistry (IHC) and in situ hybridization (ISH)...
December 14, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/29247188/hepatocytic-expression-of-human-sodium-taurocholate-cotransporting-polypeptide-enables-hepatitis-b-virus-infection-of-macaques
#13
Benjamin J Burwitz, Jochen M Wettengel, Martin A Mück-Häusl, Marc Ringelhan, Chunkyu Ko, Marvin M Festag, Katherine B Hammond, Mina Northrup, Benjamin N Bimber, Thomas Jacob, Jason S Reed, Reed Norris, Byung Park, Sven Moller-Tank, Knud Esser, Justin M Greene, Helen L Wu, Shaheed Abdulhaqq, Gabriela Webb, William F Sutton, Alex Klug, Tonya Swanson, Alfred W Legasse, Tania Q Vu, Aravind Asokan, Nancy L Haigwood, Ulrike Protzer, Jonah B Sacha
Hepatitis B virus (HBV) is a major global health concern, and the development of curative therapeutics is urgently needed. Such efforts are impeded by the lack of a physiologically relevant, pre-clinical animal model of HBV infection. Here, we report that expression of the HBV entry receptor, human sodium-taurocholate cotransporting polypeptide (hNTCP), on macaque primary hepatocytes facilitates HBV infection in vitro, where all replicative intermediates including covalently closed circular DNA (cccDNA) are present...
December 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29226133/circulating-interferon-%C3%AE-3-responsiveness-to-hbv-vaccination-and-hbv-hcv-infections-in-haemodialysis-patients
#14
Alicja E Grzegorzewska, Monika K Świderska, Adrianna Mostowska, Paweł P Jagodziński
The IFN-λ3 gene (IFNL3) plays a role in HCV clearance. We investigated circulating IFN-λ3 and IFNL3 SNPs in haemodialysis patients who differed in their response to HBV vaccination and their HBV/HCV infection status. In 201 patients, plasma IFN-λ3 was determined using ELISA. IFNL3 SNPs (rs12979860, rs8099917) were genotyped using HRM analysis. Differences in IFN-λ3 levels were shown between responders and nonresponders to HBV vaccination and between HBsAg-positive patients and those who developed anti-HBs after infection and became HBsAg negative...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29217749/hepatitis-delta-virus-persists-during-liver-regeneration-and-is-amplified-through-cell-division-both-in-vitro-and-in-vivo
#15
Katja Giersch, Oliver D Bhadra, Tassilo Volz, Lena Allweiss, Kristoffer Riecken, Boris Fehse, Ansgar W Lohse, Joerg Petersen, Camille Sureau, Stephan Urban, Maura Dandri, Marc Lütgehetmann
OBJECTIVE: Hepatitis delta virus (HDV) was shown to persist for weeks in the absence of HBV and for months after liver transplantation, demonstrating the ability of HDV to persevere in quiescent hepatocytes. The aim of the study was to evaluate the impact of cell proliferation on HDV persistence in vitro and in vivo. DESIGN: Genetically labelled human sodium taurocholate cotransporting polypeptide (hNTCP)-transduced human hepatoma(HepG2) cells were infected with HBV/HDV and passaged every 7 days for 100 days in the presence of the entry inhibitor Myrcludex-B...
December 7, 2017: Gut
https://www.readbyqxmd.com/read/29212929/nucleic-acid-polymers-are-active-against-hepatitis-delta-virus-infection-in-vitro
#16
Frauke Beilstein, Matthieu Blanchet, Andrew Vaillant, Camille Sureau
In this study, an in vitro infection model for the hepatitis delta virus (HDV) was used to evaluate the antiviral effects of phosphorothioate nucleic acid polymers (NAPs) and investigate their mechanism of action. The results show that NAPs inhibit HDV infection at less than 4 micromolar concentrations in cultures of differentiated human hepatoma cells. NAPs were shown to be active at viral entry, but inactive post entry on HDV RNA replication. Inhibition was independent of the NAPs nucleotide sequence, but dependent on both size and amphipathicity of the polymer...
December 6, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29212479/a-pilot-systematic-genomic-comparison-of-recurrence-risks-of-hepatitis-b-virus-associated-hepatocellular-carcinoma-with-low-and-high-degree-liver-fibrosis
#17
Seungyeul Yoo, Wenhui Wang, Qin Wang, M Isabel Fiel, Eunjee Lee, Spiros P Hiotis, Jun Zhu
BACKGROUND: Chronic hepatitis B virus (HBV) infection leads to liver fibrosis, which is a major risk factor in hepatocellular carcinoma (HCC) and an independent risk factor of recurrence after HCC tumor resection. The HBV genome can be inserted into the human genome, and chronic inflammation may trigger somatic mutations. However, how HBV integration and other genomic changes contribute to the risk of tumor recurrence with regards to the different degree of liver fibrosis is not clearly understood...
December 7, 2017: BMC Medicine
https://www.readbyqxmd.com/read/29208530/analytical-performances-of-simultaneous-detection-of-hiv-1-hiv-2-and-hepatitis-c-specific-antibodies-and-hepatitis-b-surface-antigen-hbsag-by-multiplex-immunochromatographic-rapid-test-with-serum-samples-a-cross-sectional-study
#18
Leman Robin, Ralph-Sydney Mboumba Bouassa, Zita Aleyo Nodjikouambaye, Laura Charmant, Mathieu Matta, Sylvie Simon, Mounir Filali, Souleymane Mboup, Laurent Bélec
BACKGROUND: The HIV/HCV/HBsAg Triplex consists in manually performed, visually interpreted, lateral flow, immunochromatographic rapid diagnostic test simultaneously detecting in 15min human immunodeficiency virus (HIV)-1 and HIV-2 and hepatitis C virus (HCV)- specific antibodies (Ab) (IgG and IgM) and hepatitis B virus (HBV) surface antigen (HBsAg) in serum, plasma and whole blood. METHODS: A hospital-based cross-sectional study was conducted on a prospective panel of serum samples from adult inpatients included from routine analysis irrespectively of age and sex, including 250 sera positive for HIV-1-specific Ab, 250 for HCV-specific Ab, 250 for HBsAg and 250 sera negative for HIV- and HCV- Ab and HBsAg, and from 110 HIV-2-infected patients living in Ivory Coast, according to the results obtained by the reference chemiluminiscent microparticle immunoassay (CMIA) Abbott Architect i2000SR analyzer (Abbott Diagnostic, Chicago, IL, USA)...
December 5, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/29194684/global-micro-rna-expression-profiling-in-the-liver-biopsies-of-hepatitis-b-virus-infected-patients-suggests-specific-mirna-signatures-for-viral-persistence-and-hepatocellular-injury
#19
Avishek Kumar Singh, Sheetalnath Babasaheb Rooge, Aditi Varshney, Madavan Vasudevan, Ankit Bhardwaj, Senthil Kumar Venugopal, Nirupama Trehanpati, Manoj Kumar, Robert Geffers, Vijay Kumar, Shiv Kumar Sarin
Hepatitis B virus (HBV) can manipulate the miRNA regulatory networks in infected cells to create a permissive environment for viral replication, cellular injury, disease onset and its progression. The aim of the present study was to understand the miRNA networks and their target genes in the liver of hepatitis B patients involved in HBV replication, liver injury and liver fibrosis. We investigated differentially expressed miRNAs by microarray in the liver biopsy samples from different stages of HBV infection and liver disease [immune tolerant (IT; n= 8); acute viral hepatitis (AVH; n=8); no fibrosis (n=16); early (F1+F2) (n=19) or late fibrosis (F3+F4) (n=14) and healthy controls (n=7)]...
November 30, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29191172/microrna-profile-in-hbv-induced-infection-and-hepatocellular-carcinoma
#20
Guanyu Wang, Fulu Dong, Zhiyao Xu, Sherven Sharma, Xiaotong Hu, Dafang Chen, Lumin Zhang, Jinping Zhang, Qinghua Dong
BACKGROUND: MicroRNAs (miRNAs) exhibit essential regulatory functions related to cell growth, apoptosis, development and differentiation. Dysregulated expression of miRNAs is associated with a wide variety of human diseases. As such miRNA signatures are valuable as biomarkers for disease and for making treatment decisions. Hepatitis B virus (HBV) is a major risk factor for hepatocellular carcinoma (HCC). Here we screened for miRNAs in chronic HBV associated HCC. METHODS: To determine the miRNAs in HCC occurrence associated with HBV infection, we analyzed global miRNA expression profiles in 12 pairs of HCC and adjacent matched non-HCC tissues from HBV-positive and HBV-negative patients using microarray analyses...
December 1, 2017: BMC Cancer
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