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Hepatitis B infection

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https://www.readbyqxmd.com/read/29228221/oncogenic-potential-of-hepatitis-b-virus-subgenotype-d1-surpasses-d3-significance-in-the-development-of-hepatocellular-carcinoma
#1
Somenath Datta, Debanjali Dasgupta, Alip Ghosh, Suchandrima Ghosh, Alak Manna, Simanti Datta, Mitali Chatterjee, Abhijit Chowdhury, Soma Banerjee
Despite widespread distribution of HBV-genotype D, the clinical implications of its 9 subgenotypes (D1-D9) have not been well documented. Here, we have investigated the impact of two major circulating HBV/D-subgenotypes, D1 and D3 in Eastern India towards pathogenesis of liver disease progression to hepatocellular carcinoma (HCC). HBV-subgenotypes were determined using full-length genome sequences of HBV isolates from patients with chronic hepatitis B (CHB), liver cirrhosis (LC) and HCC. Impact of D1 and D3 on viral lifecycle and disease progression was assessed by several invitro assays...
December 8, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/29227001/antiviral-therapy-for-hepatitis-b-virus-during-second-pregnancies
#2
Yasuhiro Wakano, Tokio Sugiura, Takeshi Endo, Koichi Ito, Mitsuyoshi Suzuki, Hitoshi Tajiri, Yasuhito Tanaka, Shinji Saitoh
Mother-to-child transmission of the hepatitis B virus (HBV) is a major concern for infected mothers, especially after their first child has become an HBV carrier despite immunoprophylaxis. Eight mothers whose first child had become an HBV carrier despite immunoprophylaxis were referred for antiviral therapy during the subsequent pregnancy. All pregnant women were seropositive for both the hepatitis B surface antigen and hepatitis B e antigen. In the treatment group (three receiving lamivudine and two receiving tenofovir), mother-to-child transmission of the HBV was successfully prevented in all infants (5/5)...
December 11, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29226508/glucose-homeostasis-in-two-degrees-of-sepsis-lethality-induced-by-caecum-ligation-and-puncture-in-mice
#3
Francielle B D Ferreira, Cristiane Dos Santos, Maciel A Bruxel, Everson A Nunes, Fernando Spiller, Alex Rafacho
Sepsis is associated with high mortality. Both critically ill humans and animal models of sepsis exhibit changes in their glucose homeostasis, that is, hypoglycaemia, with the progression of infection. However, the relationship between basal glycaemia, glucose tolerance and insulin sensitivity is not well understood. Thus, we aimed to evaluate this glucose homeostasis triad at the late stage of sepsis (24 h after surgery) in male Swiss mice subjected to lethal and sublethal sepsis by the caecal ligation and puncture (CLP) model...
December 11, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/29225759/seroprevalence-of-hepatitis-b-c-and-d-viral-among-hemodialysis-patients-in-tehran
#4
Davood Yadegarynia, Hossein Hatamai, Sara Rahmati Roodsari, Zahra Arab-Mazar
Background and Objectives: Different studies show that the prevalence of hepatitis viruses in hemodialysis (HD) patients is much greater than general population. It is important to be aware of local prevalence data, in order to control infections and prevention of nosocomial transmission. The aim of this cross-sectional study was to investigate the seroprevalence of hepatitis B, C, and D viral infections among HD patients. Materials and Methods: During 2016, a cross-sectional study was conducted in Tehran, among 360 HD patients from 5 hemodialysis centers...
June 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29225131/role-of-tenofovir-alafenamide-taf-in-the-treatment-and-prophylaxis-of-hiv-and-hbv-infections
#5
REVIEW
Erik De Clercq
Tenofovir (TFV) is the cornerstone in the treatment and prophylaxis of HIV infections. It has been routinely used in its prodrug form TDF (tenofovir disoproxil fumarate) combined with emtricitabine ((-)FTC) and other antiretroviral agents. TDF has now been replaced by TAF (tenofovir alafenamide) which allows better uptake by the lymphoid tissue. In combination with elvitegravir (E), cobicistat (C), emtricitabine (F), TAF can be advocated as an STR (single tablet regimen, Genvoya®) for the treatment of HIV infections...
December 7, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29225033/mutant-p53-gains-its-function-via-c-myc-activation-upon-cdk4-phosphorylation-at-serine-249-and-consequent-pin1-binding
#6
Peng Liao, Shelya X Zeng, Xiang Zhou, Tianjian Chen, Fen Zhou, Bo Cao, Ji Hoon Jung, Giannino Del Sal, Shiwen Luo, Hua Lu
TP53 missense mutations significantly influence the development and progression of various human cancers via their gain of new functions (GOF) through different mechanisms. Here we report a unique mechanism underlying the GOF of p53-R249S (p53-RS), a p53 mutant frequently detected in human hepatocellular carcinoma (HCC) that is highly related to hepatitis B infection and aflatoxin B1. A CDK inhibitor blocks p53-RS's nuclear translocation in HCC, whereas CDK4 interacts with p53-RS in the G1/S phase of the cells, phosphorylates it, and enhances its nuclear localization...
November 23, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29224736/a-natural-small-molecule-inhibitor-corilagin-blocks-hcv-replication-and-modulates-oxidative-stress-to-reduce-liver-damage
#7
B Uma Reddy, Ranajoy Mullick, Anuj Kumar, Geetika Sharma, Paromita Bag, Chaitrali Laha Roy, Govindarajan Sudha, Himani Tandon, Pratik Dave, Asutosh Shukla, Priyanka Srinivasan, Madhusudhan Nandhitha, Narayanaswamy Srinivasan, Saumitra Das
Hepatitis C virus (HCV) infection causes chronic liver disease, which often leads to hepatocellular carcinoma. Earlier, we have demonstrated anti-HCV property of the methanolic extract of Phyllanthus amarus, an age-old folk-medicine against viral hepatitis. Here, we report identification of a principal bioactive component 'corilagin', which showed significant inhibition of the HCV key enzymes, NS3 protease and NS5B RNA-dependent-RNA-polymerase. This pure compound could effectively inhibit viral replication in the infectious cell culture system, displayed strong antioxidant activity by blocking HCV induced generation of reactive oxygen species and suppressed up-regulation of NOX4 and TGF-β mRNA levels...
December 7, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29224133/epidemiology-of-chronic-hepatitis-b-virus-in-ireland-using-routinely-collected-surveillance-and-administrative-data-2004-2014
#8
Caroline E van Gemert, Niamh Murphy, Tara A Mitchell, Margaret E Hellard, Thornton Thornton
BACKGROUND: Ireland has a low prevalence of chronic hepatitis B virus (HBV) infection; however, there are limited recently published epidemiological data. This study aimed to describe the epidemiology of chronic HBV in Ireland between 2004 and 2014 using routine surveillance data and identify and interrogate additional data sources in Ireland to complement the interpretation of HBV surveillance data. METHODS: Routinely collected passive surveillance data of notified cases of HBV infection were collated for 2004-2014...
December 9, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29221787/evaluation-of-alternative-serum-biomarkers-to-monitor-the-progression-of-chronic-hbv-and-hcv-infection
#9
S Tsiomita, U Georgopoulou, P P Doumba, J Koskinas, K Adamidis, C Papaloukas, G Thyphronitis
Chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infections are among the most serious health conditions affecting about 600 million people worldwide leading to a number of severe liver diseases. Due to the lack of warning signs or mild symptoms during the early stage of the infection, a molecular signature associated with disease progression would be useful. Based on our recent paper where candidate biomarkers were determined through topological and modularity analysis of protein interaction networks (PINs), this study was focused on the evaluation of MIF, TNFRSF1A, FAS and TMSB4X as diagnostic biomarkers in chronic HBV and HCV infections...
December 5, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29221492/elevated-serum-%C3%AE-2-microglobulin-in-individuals-coinfected-with-hepatitis-b-and-hepatitis-d-virus-in-a-rural-settings-in-southwest-nigeria
#10
Lawrence Ehis Okoror, Ayodele Oluwaseun Ajayi, Oluwaseun Benjamin Ijalana
OBJECTIVE: Coinfection of hepatitis B virus (HBV) with hepatitis D virus (HDV) has being reported to increase severity of progression to hepatocellular carcinoma (HCC) and liver cirrhosis (LC). Beta microglobulin (2βM) which is present on the surfaces of blood cells in acceptable levels is a tumor marker which may become elevated in disease conditions. This study hence observed the prevalence of HBV and HDV coinfection in a rural population and their 2βM concentration. RESULTS: Of the 368 samples, 66 (17...
December 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29221184/hepatitis-b-virus-x-protein-inhibits-apoptosis-by-modulating-endoplasmic-reticulum-stress-response
#11
Jia Li, Jiang He, Yongming Fu, Xingwang Hu, Lun-Quan Sun, Yan Huang, Xuegong Fan
Chronic Hepatitis B virus (HBV) infection is a major risk of hepatocellular carcinoma (HCC) worldwide. Hepatitis B virus X protein (HBx) is encoded by one of the four open reading frames of HBV, and is well known as an important coactivator for HBV replication and HBV-associated hepatocellular carcinogenesis. However, its role in keeping cells from apoptosis to promote HCC proliferation remains controversial. Here, we used HBx expressing HCC cells as a model, to investigate the mechanism of HBx-mediated cellular response to endoplasmic reticulum (ER) stress...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29218813/association-of-pnpla3-rs738409-polymorphism-with-liver-steatosis-but-not-with-cirrhosis-in-patients-with-hbv-infection-systematic-review-with-meta-analysis
#12
REVIEW
Saman Ghalamkari, Heidar Sharafi, Seyed Moayed Alavian
BACKGROUND AND AIM: Hepatitis B virus (HBV) infection is a worldwide health issue and is well known to be the main cause of developing secondary liver complications such as cirrhosis and hepatocellular carcinoma (HCC). The PNPLA3 rs738409 polymorphism has been investigated conclusively with occurrence risk of steatosis and cirrhosis. Therefore, performing a meta-analysis of the available studies with the aim of clarifying the association between rs738409 and occurrence risk of steatosis and cirrhosis among HBV-infected patients would be helpful...
December 7, 2017: Journal of Gene Medicine
https://www.readbyqxmd.com/read/29218046/tlr2-expression-in-peripheral-cd4-t-cells-promotes-th17-response-and-is-associated-with-disease-aggravation-of-hepatitis-b-virus-related-acute-on-chronic-liver-failure
#13
Chunli Xu, Yinping Lu, Xin Zheng, Xuemei Feng, Xuecheng Yang, Joerg Timm, Jun Wu, Baoju Wang, Mengji Lu, Dongliang Yang, Jia Liu
Th17 responses have been shown to play crucial roles in the pathogenesis of hepatitis B virus (HBV)-associated acute-on-chronic liver failure (ACLF). The mechanism underlying the enhanced Th17 responses in these patients remains largely unclear. Here we investigated toll-like receptors (TLRs) expression in peripheral T cells and their roles in Th17 cell differentiation and disease aggravation in ACLF patients. 18 healthy subjects (HS), 20 chronic HBV-infected (CHB) patients, and 26 ACLF patients were enrolled and examined for TLRs expression in peripheral blood mononuclear cells (PBMCs)...
2017: Frontiers in Immunology
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
#14
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/29216251/molecular-characterization-of-hepatitis-b-virus-in-bangladesh-reveals-a-highly-recombinant-population
#15
Saif Ullah Munshi, Thanh Thi Thanh Tran, Truc Nhu Thanh Vo, Shahina Tabassum, Nahida Sultana, Trang Hoa Nguyen, Munira Jahan, Chau Ngoc Le, Stephen Baker, Motiur Rahman
The natural history and treatment outcome of hepatitis B viruses (HBV) infection is largely dependent on genotype, subgenotype, and the presence or absence of virulence associated mutations. We have studied the prevalence of genotype and subgenotype as well as virulence and drug resistance associated mutations and prevalence of recombinant among HBV from Bangladesh. A prospective cross-sectional study was conducted among treatment naïve chronic HBV patients attending at Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh for HBV viral load assessment between June and August 2015...
2017: PloS One
https://www.readbyqxmd.com/read/29216213/a-multi-scale-spatial-model-of-hepatitis-b-viral-dynamics
#16
Quentin Cangelosi, Shawn A Means, Harvey Ho
Chronic hepatitis B viral infection (HBV) afflicts around 250 million individuals globally and few options for treatment exist. Once infected, the virus entrenches itself in the liver with a notoriously resilient colonisation of viral DNA (covalently-closed circular DNA, cccDNA). The majority of infections are cleared, yet we do not understand why 5% of adult immune responses fail leading to the chronic state with its collateral morbid effects such as cirrhosis and eventual hepatic carcinoma. The liver environment exhibits particularly complex spatial structures for metabolic processing and corresponding distributions of nutrients and transporters that may influence successful HBV entrenchment...
2017: PloS One
https://www.readbyqxmd.com/read/29215820/antiviral-efficacy-of-tenofovir-monotherapy-in-children-with-nucleos-t-ide-naive-chronic-hepatitis-b
#17
Jae Young Choe, Jae Sung Ko, Byung Ho Choe, Jung Eun Kim, Ben Kang, Kyung Jae Lee, Hye Ran Yang
BACKGROUND: The purpose was to compare the efficacy between tenofovir disoproxil fumarate (TDF) and lamivudine (LMV) in children with nucleos(t)ide-naive chronic hepatitis B (CHB) infection. Patients with CHB were treated with TDF in the immune-reactive phase and compared with a historical control group of patients treated with LMV before the TDF era. METHODS: Hepatitis B virus (HBV) DNA titer decrements (> 3 log₁₀ IU/mL) were monitored after treatment initiation...
January 8, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29214184/protective-effects-of-moringa-oleifera-on-hbv-genotypes-c-and-h-transiently-transfected-huh7-cells
#18
Sina Feustel, Fabiola Ayón-Pérez, Ana Sandoval-Rodriguez, Roberto Rodríguez-Echevarría, Homero Contreras-Salinas, Juan Armendáriz-Borunda, L V Sánchez-Orozco
Chronic hepatitis B infection treatment implicates a long-lasting treatment. M. oleifera extracts contain compounds with antiviral, antioxidant, and antifibrotic properties. In this study, the effect of M. oleifera was evaluated in Huh7 cells expressing either HBV genotypes C or H for the antiviral, antifibrotic, anti-inflammatory, and antioxidative responses. Huh7 cells were treated with an aqueous extract of M. oleifera (leaves) at doses of 0, 30, 45, or 60 μg/mL. The replicative virus and TGF-β1, CTGF, CAT, IFN-β1, and pgRNA expressions were measured by real time...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/29212929/nucleic-acid-polymers-are-active-against-hepatitis-delta-virus-infection-in-vitro
#19
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
#20
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
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