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https://www.readbyqxmd.com/read/28650402/hiv-hbv-co-infection-is-a-significant-risk-factor-for-liver-fibrosis-in-tanzanian-hiv-infected-adults
#1
Claudia Hawkins, Beatrice Christian, Emanuel Fabian, Irene Macha, Cecilia Gawile, Shida Mpangala, Nzovu Ulenga, Chloe L Thio, Lauren Rose Ammerman, Ferdinand Mugusi, Wafaie Fawzi, Richard Green, Robert Murphy
BACKGROUND: In sub-Saharan Africa, the burden of liver disease associated with chronic hepatitis B (HBV) and HIV is unknown. We characterized liver disease using aspartate aminotransferase-to-platelet ratio index (APRI) and FIB-4 in patients with HIV, HBV, and HIV/HBV co-infection in Tanzania. METHODS: Using a cross sectional design, we compared the prevalence of liver fibrosis in treatment-naive HIV mono-infected, HBV mono-infected, and HIV/HBV co-infected adults enrolled at Management and Development for Health (MDH)-supported HIV treatment clinics in Dar es Salaam, Tanzania...
June 22, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28648087/cost-effectiveness-of-a-hepatitis-b-virus-screening-strategy-to-prevent-reactivation-in-patients-with-hematologic-neoplasms
#2
Javier Crespo, Rafael Esteban, Covadonga Torres, Itziar Oyagüez, Miguel Ángel Casado, María Buti
INTRODUCTION: The effectiveness of a screening strategy for the detection of a hepatitis B virus (HBV) infection followed by prophylaxis in order to prevent HBV reactivation was assessed in patients with hematologic neoplasms. MATERIAL AND METHODS: A decision tree was developed to compare the cost and effectiveness (prevented reactivations) over an 18 month period of a screening strategy prior to chemotherapy with R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine and prednisone) with a non-screening approach...
June 26, 2017: Revista Española de Enfermedades Digestivas
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
#3
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/28645725/cell-surface-n-glycan-alteration-in-hepad38-cell-lines-expressing-hepatitis-b-virus
#4
Surya Agung Priyambada, Ryo Misaki, Toru Okamoto, Yuta Okamoto, Takao Ohashi, Keiji Ueda, Yoshiharu Matsuura, Kazuhito Fujiyama
Hepatitis B virus (HBV) is the smallest partially double-stranded DNA virus known to infect humans. Worldwide, more than 50% of hepatocellular carcinoma (HCC) cases are related to chronic Hepatitis B. Development of HCC from normal liver cells is characterized by changes in cell surface N-glycans, which can promote the invasive behavior of tumor cells, leading ultimately to the progression of cancer. However, little is understood about the cell surface N-glycans of HBV-infected liver cells. We try to address this by taking advantage of the HepAD38 cell line, which can replicate HBV in the absence of tetracycline [tet(-)] in growth medium...
June 20, 2017: Virus Research
https://www.readbyqxmd.com/read/28645004/amplified-detection-of-hepatitis-b-virus-using-an-electrochemical-dna-biosensor-on-a-nanoporous-gold-platform
#5
Laleh Enayati Ahangar, Masoud A Mehrgardi
In the present study, a nanoporous gold platform was applied for the amplified detection of Hepatitis B virus (HBV) by an electrochemical DNA biosensor. Ferrocene as a redox reporter was covalently attached to the DNA probe and its electrochemical signal was recorded as the biosensor response. For real samples, DNA was firstly extracted from blood of patients and then amplified by polymerase chain reaction (PCR) for 5cycles. Sensitivity of this biosensor was enhanced by using nanoporous gold electrode, therefore this sensor can discriminate the genome of HBV in real sample with low PCR cycles...
June 15, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28642136/a-novel-hepatitis-b-virus-derived-cis-acting-sequence-that-enhances-expression-of-transgenes-delivered-by-plasmid-vectors-in-eukaryote-cell-culture-systems
#6
Seoung-Ae Lee, Hong Kim, So-Young Lee, Bum-Joon Kim
We tested the effectiveness of a novel 13-bp hepatitis B virus (HBV)-derived cis-acting element (CAE) (ACCTCGACAAGGC), called the DT2 CAE, in augmenting transgene expression delivered by plasmid vectors in eukaryotic cells. The addition of the DT2 CAE just upstream of the start codon of several different target proteins (luciferase, EGFP, LHB, HBsAg, and MIF) in DNA plasmid constructs enhanced their translation in a posttranscriptional manner, irrespective of cell type (cell lines or primary cells) or promoter (CMV or HBV preS1 promoters), suggesting its feasibility for enhanced protein production in eukaryotic cell systems...
June 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28640739/hepatitis-b-virus-core-antigen-mutations-predict-post-operative-prognosis-of-patients-with-primary-hepatocellular-carcinoma
#7
Jian'an Jia, Huiming Li, Hui Wang, Shipeng Chen, Mengmeng Wang, Huijuan Feng, Yuzhen Gao, Yunjiu Wang, Meng Fang, Chunfang Gao
The aim of this study was to explore the relationship between hepatitis B virus (HBV) core antigen (HBc) mutations and the post-operative prognosis of HBV-related hepatocellular carcinoma (HCC). In total, 98 patients suffering from HBV-related HCC and treated with surgery were enrolled, with a 48 month follow-up. The preCore/Core region of the HBV genome from tumour tissue (TT) and paired adjacent non-tumour tissue (ANTT) of these patients was sequenced, and a phylogenetic tree was reconstructed. The correlations between the viral features and evolutionary divergence of preCore/Core amino acid sequences from 67 paired TTs and ANTTs were analysed...
June 22, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28639033/functional-restoration-of-cd56-bright-nk-cells-facilitates-immune-control-via-il-15-and-nkg2d-in-patients-under-antiviral-treatment-for-chronic-hepatitis-b
#8
Tao Chen, Lin Zhu, Aichao Shi, Lin Ding, Xiaoping Zhang, Zhenmin Tan, Wei Guo, Weiming Yan, Meifang Han, Jidong Jia, Xiaoping Luo, Detlef Schuppan, Qin Ning
BACKGROUND AND AIMS: Hepatitis B virus (HBV) is intrinsically immunogenic, with long-lasting immune control in many patients. However, the mechanisms and key cell types underlying effective immune control are incompletely understood. METHODS: We studied the restoration of natural killer (NK) cell numbers and function post antiviral treatment in 52 hepatitis B e antigen (HBeAg)-positive chronic hepatitis B (CHB) patients who received telbivudine (LdT) for 48 weeks...
June 20, 2017: Hepatology International
https://www.readbyqxmd.com/read/28637869/heat-shock-proteins-stimulate-apobec-3-mediated-cytidine-deamination-in-the-hepatitis-b-virus
#9
Zhigang Chen, Thomas L Eggerman, Alexander V Bocharov, Irina N Baranova, Tatyana G Vishnyakova, Roger Kurlander, Amy P Patterson
Apolipoprotein B mRNA-editing enzyme catalytic subunit 3 (APOBEC-3) enzymes are cytidine deaminases that are broadly and constitutively expressed. They are often upregulated during carcinogenesis and candidate genes for causing the major single-base substitution in cancer-associated DNA mutations. Moreover, APOBEC-3s are involved in host innate immunity against many viruses. However, how APOBEC-3 mutational activity is regulated in normal and pathological conditions remains largely unknown. Heat shock protein levels are often elevated in both carcinogenesis and viral infection and are associated with DNA mutations...
June 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28637752/identification-of-intermediate-in-hepatitis-b-virus-ccc-dna-formation-and-sensitive-and-selective-ccc-dna-detection
#10
Jun Luo, Xiuji Cui, Lu Gao, Jianming Hu
The hepatitis B virus (HBV) covalently closed circular (CCC) DNA functions as the only viral template capable of coding for all the viral RNA species and is thus essential to initiate and sustain viral replication. CCC DNA is converted, in a multi-step and ill-understood process, from a relaxed circular (RC) DNA, in which neither of the two DNA strands is covalently closed. To detect putative intermediates during RC to CCC DNA conversion, two 3' exonucleases Exo I and Exo III, in combination were used to degrade all DNA strands with a free 3' end, which would nevertheless preserve closed circular DNA, either single-stranded (SS) or double-stranded (DS)...
June 21, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28636622/inhibition-of-hepatitis-b-viral-entry-by-nucleic-acid-polymers-in-heparg-cells-and-primary-human-hepatocytes
#11
Clément Guillot, Nora Martel, Françoise Berby, Isabelle Bordes, Olivier Hantz, Matthieu Blanchet, Camille Sureau, Andrew Vaillant, Isabelle Chemin
Hepatitis B virus (HBV) infection remains a major public health concern worldwide with 240 million individuals chronically infected and at risk of developing cirrhosis and hepatocellular carcinoma. Current treatments rarely cure chronic hepatitis B infection, highlighting the need for new anti-HBV drugs. Nucleic acid polymers (NAPs) are phosphorothioated oligonucleotides that have demonstrated a great potential to inhibit infection with several viruses. In chronically infected human patients, NAPs administration lead to a decline of blood HBsAg and HBV DNA and to HBsAg seroconversion, the expected signs of functional cure...
2017: PloS One
https://www.readbyqxmd.com/read/28635668/the-role-of-cccdna-in-hbv-maintenance
#12
REVIEW
Lena Allweiss, Maura Dandri
Chronic hepatitis B virus (HBV) infection continues to be a major health burden worldwide; it can cause various degrees of liver damage and is strongly associated with the development of liver cirrhosis and hepatocellular carcinoma. The molecular mechanisms determining HBV persistence are not fully understood, but these appear to be multifactorial and the unique replication strategy employed by HBV enables its maintenance in infected hepatocytes. Both the stability of the HBV genome, which forms a stable minichromosome, the covalently closed circular DNA (cccDNA) in the hepatocyte nucleus, and the inability of the immune system to resolve chronic HBV infection are believed to be key mechanisms of HBV chronicity...
June 21, 2017: Viruses
https://www.readbyqxmd.com/read/28634402/enhanced-antiviral-and-antifibrotic-effects-of-short-hairpin-rnas-targeting-hbv-and-tgf-%C3%AE-in-hbv-persistent-mice
#13
Lei Ye, Fangming Kan, Tao Yan, Jiaqi Cao, Leiliang Zhang, Zhijian Wu, Wuping Li
The hepatitis B virus (HBV) causes acute and chronic liver infection, which may lead to liver cirrhosis and hepatocellular carcinoma. Current treatments including interferons and nucleotide analogs, have limited therapeutic effects, underscoring the need to identify effective therapeutic options to inhibit HBV replication and prevent complications. Previous animal models mimicking chronic HBV infection do not faithfully reflect disease progression in humans. Here, we used our established HBV-persistent mouse line with liver fibrosis to evaluate the efficacy of novel therapies...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634352/differences-in-sequences-between-hbv-relaxed-circular-dna-and-covalently-closed-circular-dna
#14
Magda Rybicka, Anna Woziwodzka, Tomasz Romanowski, Piotr Stalke, Marcin Dręczewski, Krzysztof Piotr Bielawski
The hepatitis B virus (HBV) genome exists in two forms: circular covalently closed DNA (cccDNA) and relaxed circular DNA (RCDNA). Here, we investigated the presence of differences in the sequences of both forms in paired samples of serum and liver tissue. The serum and liver biopsy samples were collected at the same time from 67 chronically infected patients. The genotyping of the RCDNA and cccDNA was performed using mass spectrometry analysis. The HBV mutations located in the HBV pol (P) and the HBV basal core promoter/pre-core (BCP/PC) regions were included...
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28633989/efficacy-and-cytotoxicity-in-cell-culture-of-novel-%C3%AE-hydroxytropolone-inhibitors-of-hepatitis-b-virus-ribonuclease-h
#15
Elena Lomonosova, Jil Daw, Aswin K Garimallaprabhakaran, Nana B Agyemang, Yashkumar Ashani, Ryan P Murelli, John E Tavis
Chronic Hepatitis B virus (HBV) infection is a major worldwide public health problem. Current direct-acting anti-HBV drugs target the HBV DNA polymerase activity, but the equally essential viral ribonuclease H (RNaseH) activity is unexploited as a drug target. Previously, we reported that α-hydroxytropolone compounds can inhibit the HBV RNaseH and block viral replication. Subsequently, we found that our biochemical RNaseH assay underreports efficacy of the α-hydroxytropolones against HBV replication. Therefore, we conducted a structure-activity analysis of 59 troponoids against HBV replication in cell culture...
June 17, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28632964/long-term-follow-up-of-patients-triply-infected-with-hiv-and-hepatitis-b-and-c-viruses-in-a-comprehensive-hospital-in-central-china
#16
Rongrong Yang, Xien Gui, Yong Xiong, Shicheng Gao
The clinical characteristics of patients triply infected with HIV, HBV and HCV are notable. From January 2005 to June 2014, a total of 115 cART-naive HIV/HBV/HCV infected individuals were studied and 91 of them were followed-up consecutively after cART with 3TC. After cART with 3TC, the HBV-DNA positive rate decreased from 37.4% (43/115) to 9.9% (9/91) (P<0.001), whereas the HCV-RNA positive rate increased from 53.9% (62/115) to 70.3% (64/91) (P=0.016), and HCV-RNA level increased from 3.52 log10 copies/ml to 4...
June 20, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28632923/comparing-the-risk-of-hepatitis-b-virus-reactivation-between-direct-acting-antiviral-therapies-and-interferon-based-therapies-for-hepatitis-c
#17
Naoki Kawagishi, Goki Suda, Masahiro Onozawa, Megumi Kimura, Osamu Maehara, Masatsugu Ohara, Takaaki Izumi, Machiko Umemura, Jun Ito, Masato Nakai, Takuya Sho, Mitsuteru Natsuizka, Kenichi Morikawa, Koji Ogawa, Naoya Sakamoto
BACKGROUND: Hepatitis B virus (HBV)-reactivation has been reported during anti-hepatitis C treatment in patients with hepatitis C virus (HCV) and HBV co-infection. We aimed to evaluate the frequency and risk factors of HBV-reactivation during anti-HCV therapy and compared those between interferon (IFN)-free direct-acting antiviral (DAA)-therapies and IFN-based therapies. METHODS: 322 patients with HCV infection receiving anti-HCV therapy were retrospectively screened...
June 20, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28632898/hbsag-loss-after-peginterferon-and-nucleotide-combination-treatment-in-chronic-hepatitis-b-patients-5-years-of-follow-up
#18
Femke Stelma, Meike H van der Ree, Louis Jansen, Martine W Peters, Harry L A Janssen, Hans L Zaaijer, R Bart Takkenberg, Hendrik W Reesink
BACKGROUND AND AIMS: Combining peginterferon alfa-2a (pegIFN) with a nucleotide analogue can result in higher rates of HBsAg loss than either therapy given alone. Here we investigated the durability of the response to combination therapy in chronic hepatitis B (CHB) patients after 5 years of follow-up. METHODS: In the initial study, 92 CHB patients (44 HBeAg positive, 48 HBeAg negative) with HBV DNA > 100,000 c/mL (~20,000 IU/mL) and active hepatitis were treated for 48 weeks with pegIFN 180 μg/week and 10 mg adefovir dipivoxil daily...
June 20, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28627791/no-evidence-of-hepatitis-b-virus-reactivation-in-patients-with-resolved-infection-treated-with-direct-acting-antivirals-for-hepatitis-c-in-a-large-real-world-cohort
#19
V T Mücke, M M Mücke, K-H Peiffer, N Weiler, T M Welzel, C Sarrazin, S Zeuzem, A Berger, J Vermehren
BACKGROUND: Hepatitis B virus (HBV) reactivation has been observed following interferon (IFN)-based treatment in HBV/hepatitis C virus (HCV) co-infected patients. Recent reports suggest that reactivation may also occur in both hepatitis B surface antigen (HBsAg)-positive and HBsAg-negative patients during HCV treatment with direct-acting antivirals (DAAs). AIM: To investigate the rate of patients with HBV reactivation during IFN-based and IFN-free HCV treatment in a large real-world cohort...
June 19, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28627473/glycyrrhetic-acid-but-not-glycyrrhizic-acid-strengthened-entecavir-activity-by-promoting-its-subcellular-distribution-in-the-liver-via-efflux-inhibition
#20
Qianying Chen, Hongzhu Chen, Wenjie Wang, Jiali Liu, Wenyue Liu, Ping Ni, Guowei Sang, Guangji Wang, Fang Zhou, Jingwei Zhang
Entecavir (ETV) is a superior nucleoside analogue used to treat hepatitis B virus (HBV) infection. Although its advantages over other agents include low viral resistance and the elicitation of a sharp decrease in HBV DNA, adverse effects such as hepatic steatosis, hepatic damage and lactic acidosis have also been reported. Glycyrrhizin has long been used as hepato-protective medicine. The clinical combination of ETV plus glycyrrhizin in China displays better therapeutic effects and lower rates of liver damage...
June 13, 2017: European Journal of Pharmaceutical Sciences
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