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https://www.readbyqxmd.com/read/29791991/the-role-of-serum-hbv-rna-levels-as-a-marker-of-intrahepatic-viral-and-histologic-activity
#1
Jung Hyun Kwon
No abstract text is available yet for this article.
May 25, 2018: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/29790851/rig-i-enhances-ifn-%C3%AE-response-by-promoting-antiviral-protein-expression-in-patients-with-chronic-hepatitis-b
#2
Shu Wu, Jinpiao Lin, Ya Fu, Qishui Ou
BACKGROUND: IFN-α is widely used for the treatment of chronic hepatitis B (CHB) infection due to its high HBsAg loss. However, IFN-α treatment has a number of side effects. Thus, identification of molecular biomarkers to predict IFN-α therapeutic effect would be useful in the clinic. In this study, we aim to study the role of RIG-I in prediction of IFN-α curative effect of CHB patients. METHODS: A total of 65 CHB patients treated with PegIFN-αweekly for 48 weeks were enrolled...
May 23, 2018: Antiviral Therapy
https://www.readbyqxmd.com/read/29790592/hepatitis-b-virus-upregulated-lnc-hur1-promotes-cell-proliferation-and-tumorigenesis-by-blocking-p53-activity
#3
Ningning Liu, Qi Liu, Xiaohai Yang, Fang Zhang, Xinda Li, Yuanwu Ma, Feifei Guan, Xin Zhao, Zhiwei Li, Lianfeng Zhang, Xin Ye
Recent studies have indicated that a number of lncRNAs are dysregulated in hepatocellular carcinoma, while their aberrant expressions are associated with tumorigenesis and poor prognosis. To identify HBV-related lncRNAs, we used RNA deep sequencing to quantify the abundances of lncRNAs in HepG2 cells and HBV transgenic HepG2-4D14 cells. Here, we demonstrate that lnc-HUR1 is significantly upregulated in HepG2-4D14 cells. We found that HBV-encoded HBx can enhance the transcription of lnc-HUR1. Overexpression of lnc-HUR1 promotes cell proliferation, while knockdown of lnc-HUR1 inhibits cell growth...
May 23, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29785877/hepatitis-b-virus-lymphotropism-emerging-details-and-challenges
#4
Shivali S Joshi, Carla S Coffin
The hepatitis B virus (HBV) is predominantly a hepatotropic virus but also infects cells of the lymphatic system. HBV genomes (DNA, messenger (m)RNA, covalently closed circular (ccc) DNA) and proteins have been found in extrahepatic sites such as peripheral blood mononuclear cells (PBMC), lymph nodes, spleen, bone marrow and cerebrospinal fluid. HBV entry into hepatocytes occurs by binding of the HBV preS1 surface protein to its specific receptor, the bile acid transporter, sodium taurocholate co-transporting polypeptide (NTCP)...
May 22, 2018: Biotechnology & Genetic Engineering Reviews
https://www.readbyqxmd.com/read/29782550/multiple-roles-of-core-protein-linker-in-hepatitis-b-virus-replication
#5
Kuancheng Liu, Laurie Luckenbaugh, Xiaojun Ning, Ji Xi, Jianming Hu
Hepatitis B virus (HBV) core protein (HBc) contains an N-terminal domain (NTD, assembly domain) and a C-terminal domain (CTD), which are linked by a flexible linker region. HBc plays multiple essential roles in viral replication, including capsid assembly, packaging of the viral pregenomic RNA (pgRNA) into nucleocapsids, viral reverse transcription that converts pgRNA to the genomic DNA, and secretion of DNA-containing (complete) virions or genome-free (empty) virions. The HBc linker is generally assumed to act merely as a spacer between NTD and CTD but some results suggest that the linker may affect NTD assembly...
May 21, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29782545/rosmarinic-acid-is-a-novel-inhibitor-for-hepatitis-b-virus-replication-targeting-viral-epsilon-rna-polymerase-interaction
#6
Yuta Tsukamoto, Sotaro Ikeda, Koji Uwai, Riho Taguchi, Kazuaki Chayama, Takemasa Sakaguchi, Ryo Narita, Wan-Ling Yao, Fumihiko Takeuchi, Yukie Otakaki, Koichi Watashi, Takaji Wakita, Hiroki Kato, Takashi Fujita
Current therapeutics for hepatitis B virus (HBV) patients such as nucleoside analogs (NAs) are effective; however, new antiviral drugs against HBV are still desired. Since the interaction between the epsilon (ε) sequence of HBV pregenomic RNA and viral polymerase (Pol) is a key step in the HBV replication cycle, we aimed to identify small compounds for its inhibition, and established a pull-down assay system for the detection of ε-RNA-binding-Pol. Screening showed that 5 out of 3,965 compounds inhibited ε-Pol binding, and we identified rosmarinic acid, which exhibited specificity, as a potential antiviral agent...
2018: PloS One
https://www.readbyqxmd.com/read/29765512/dhx9-regulates-production-of-hepatitis-b-virus-derived-circular-rna-and-viral-protein-levels
#7
Kazuma Sekiba, Motoyuki Otsuka, Motoko Ohno, Takahiro Kishikawa, Mari Yamagami, Tatsunori Suzuki, Rei Ishibashi, Takahiro Seimiya, Eri Tanaka, Kazuhiko Koike
Hepatitis B virus (HBV) infection, which is a major health concern worldwide, can lead to liver cirrhosis and hepatocellular carcinoma. Although current nucleos(t)ide analogs efficiently inhibit viral reverse transcription and viral DNA load clinically, episomal viral covalently closed circular DNA (cccDNA) minichromosomes and transcripts from cccDNA continue to be expressed over the long term. We hypothesized that, under these conditions, viral transcripts may have biological functions involved in pathogenesis...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29764511/high-serum-levels-of-pregenomic-rna-reflect-frequently-failing-reverse-transcription-in-hepatitis-b-virus-particles
#8
Kasthuri Prakash, Gustaf E Rydell, Simon B Larsson, Maria Andersson, Gunnar Norkrans, Heléne Norder, Magnus Lindh
BACKGROUND: Hepatocytes infected by hepatitis B virus (HBV) produce different HBV RNA species, including pregenomic RNA (pgRNA), which is reverse transcribed during replication. Particles containing HBV RNA are present in serum of infected individuals, and quantification of this HBV RNA could be clinically useful. METHODS: In a retrospective study of 95 patients with chronic HBV infection, we characterised HBV RNA in serum in terms of concentration, particle association and sequence...
May 15, 2018: Virology Journal
https://www.readbyqxmd.com/read/29763915/serum-from-chronic-hepatitis-b-patients-promotes-growth-and-proliferation-via-the-igf-ii-igf-ir-mek-erk-signaling-pathway-in-hepatocellular-carcinoma-cells
#9
Yuanyuan Ji, Zhidong Wang, Haiyan Chen, Lei Zhang, Fei Zhuo, Qingqing Yang
BACKGROUND/AIMS: Chronic hepatitis B virus (HBV) infection (CHB) plays a central role in the etiology of hepatocellular carcinoma (HCC). Emerging evidence implicates insulin-like growth factor (IGF)-II as a major risk factor for the growth and development of HCC. However, the relationship between HBV infection and IGF-II functions remains to be elucidated. METHODS: Levels of circulating IGF-II and IGF-I receptor (IGF-IR) in healthy donors (HDs) and CHB patients were tested by ELISA...
May 9, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29761607/epidemiology-and-phylogenetic-analysis-of-hepatitis-d-virus-infection-in-australia
#10
Kathy Jackson, Jennifer MacLachlan, Benjamin Cowie, Stephen Locarnini, D Scott Bowden, Nasra Higgins, Theo Karapanagiotidis, Suellen Nicholson, Margaret Littlejohn
BACKGROUND: The incidence and trends in hepatitis D virus (HDV) in Australia have not been recently assessed and the circulating genotypes have never been determined. AIM: This study aimed to characterise the current virology and epidemiology of HDV. METHODS: Notifiable disease surveillance and laboratory testing data were analysed to assess demographics, risk factors, and trends. HDV serology and RNA testing were performed on requested samples from 2010-2016...
May 14, 2018: Internal Medicine Journal
https://www.readbyqxmd.com/read/29761292/-chronic-hepatitis-b-and-d-delta-current-and-future-treatments
#11
REVIEW
N Wortmann, C Höner Zu Siederdissen, M Cornberg
BACKGROUND: Worldwide, hepatitis B virus (HBV) infection is among the 30 leading causes of death, despite effective vaccination and therapeutic options. Chronic hepatitis delta (coinfection with hepatitis D virus) leads to a rapid disease progression. AIMS: Based on current international guidelines and studies, an overview about present and future therapeutic options for chronic hepatitis B and delta is provided. RESULTS: Therapy with nucleoside or nucleotide analogues leads to nearly complete HBV DNA suppression, which is associated with regression of liver fibrosis and a lower risk for the development of hepatocellular carcinoma...
May 14, 2018: Der Internist
https://www.readbyqxmd.com/read/29760415/rbm24-stabilizes-hepatitis-b-virus-pregenomic-rna-but-inhibits-core-protein-translation-by-targeting-the-terminal-redundancy-sequence
#12
Yongxuan Yao, Bo Yang, Huang Cao, Kaitao Zhao, Yifei Yuan, Yingshan Chen, Zhenhua Zhang, Yun Wang, Rongjuan Pei, Jizheng Chen, Xue Hu, Yuan Zhou, Mengji Lu, Chunchen Wu, Xinwen Chen
The terminal redundancy (TR) sequence of the 3.5-kb hepatitis B virus (HBV) RNA contains sites that govern many crucial functions in the viral life cycle, including polyadenylation, translation, RNA packaging, and DNA synthesis. In the present study, RNA-binding motif protein 24 (RBM24) is shown to be involved in the modulation of HBV replication by targeting the TR of HBV RNA. In HBV-transfected hepatoma cell lines, both knockdown and overexpression of RBM24 led to decreased HBV replication and transcription...
May 14, 2018: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29753787/studying-sparsely-populated-conformational-states-in-rna-combining-chemical-synthesis-and-solution-nmr-spectroscopy
#13
Elisabeth Strebitzer, Felix Nußbaumer, Johannes Kremser, Martin Tollinger, Christoph Kreutz
Using chemical synthesis and solution NMR spectroscopy, RNA structural ensembles including a major ground state and minor populated excited states can be studied at atomic resolution. In this work, atom-specific 13 C labeled RNA building blocks - a 5-13 C-uridine and a 2,8-13 C2 -adenosine building block - are used to introduce isolated 13 C-1 H-spin topologies into a target RNA to probe such structural ensembles via NMR spectroscopy. First, the 5-13 C-uridine 2'-O-TBDMS-phosphoramidite building block was introduced into a 21 nucleotide (nt) tP5c stem construct of the tP5abc subdomain of the Tetrahymena group I ribozyme...
May 10, 2018: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/29743374/common-and-distinct-capsid-and-surface-protein-requirements-for-secretion-of-complete-and-genome-free-hepatitis-b-virions
#14
Xiaojun Ning, Laurie Luckenbaugh, Kuancheng Liu, Volker Bruss, Camille Sureau, Jianming Hu
During the morphogenesis of hepatitis B virus (HBV), an enveloped virus, two types of virions are secreted: (1) a minor population of complete virions containing a mature nucleocapsid with the characteristic, partially double-stranded, relaxed circular DNA genome and (2) a major population containing an empty capsid with no DNA or RNA (empty virions). Secretion of both types of virions requires interactions between the HBV capsid or core protein (HBc) and the viral surface or envelope proteins. We have studied the requirements from both HBc and envelope proteins for empty virion secretion, in comparison with those for secretion of complete virions...
May 9, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29742265/antiproliferative-effect-of-urolithin-a-the-ellagic-acid-derived-colonic-metabolite-on-hepatocellular-carcinoma-hepg2-2-15-cells-by-targeting-lin28a-let-7a-axis
#15
Zhenpeng Qiu, Junxuan Zhou, Cong Zhang, Ye Cheng, Junjie Hu, Guohua Zheng
An abnormality in the Lin28/let-7a axis is relevant to the progression of hepatitis B virus (HBV)-positive hepatocellular carcinoma (HCC), which could be a novel therapeutic target for this malignant tumor. The present study aimed to investigate the antiproliferative and anti-invasive effects of urolithin A in a stable full-length HBV gene integrated cell line HepG2.2.15 using CCK-8 and transwell assays. The RNA and protein expressions of targets were assessed by quantitative PCR and western blot, respectively...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29741634/serum-hbv-rna-as-a-predictor-of-peginterferon-alfa-2a-40kd-response-in-patients-with-hbeag-positive-chronic-hepatitis-b
#16
Florian van Bömmel, Alena van Bömmel, Alexander Krauel, Cynthia Wat, Vedran Pavlovic, Lei Yang, Danilo Deichsel, Thomas Berg, Stephan Böhm
Background: Hepatitis B virus (HBV) RNA is a novel serum biomarker that has the potential to predict treatment response in patients with chronic hepatitis B. We explored whether HBV RNA serum levels can predict hepatitis B e antigen (HBeAg) seroconversion in patients treated with peginterferon alfa-2a. Methods: Serum samples from HBeAg-positive patients previously treated with peginterferon alfa-2a in two large randomized controlled trials were retrospectively analyzed...
May 8, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29734472/hbv-serum-dna-and-rna-levels-in-nucleos-t-ide-analogue-treated-or-untreated-patients-during-chronic-and-acute-infection
#17
Emily K Butler, Jeffrey Gersch, Anne McNamara, Ka-Cheung Luk, Vera Holzmayer, Maria de Medina, Eugene Schiff, Mary Kuhns, Gavin A Cloherty
Treatment of chronic hepatitis B (CHB) patients with nucleos(t)ide analogues (NA) suppresses HBV DNA synthesis but does not affect synthesis of HBV pregenomic RNA (pgRNA). HBV pgRNA is detectable in the serum during NA treatment and has been proposed as a marker of HBV covalently closed circular DNA (cccDNA) activity within the infected hepatocyte. We developed an automated assay for the quantification of serum HBV pgRNA using a dual-target qRT-PCR approach on the Abbott m2000sp/rt system. We demonstrate accurate detection and quantification of serum HBV RNA...
May 7, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29725471/downregulation-of-braf-activated-non-protein-coding-rna-in-patients-with-hepatitis-b-virus-associated-hepatocellular-carcinoma
#18
Na-Na Zhao, Cheng Wang, Cheng-Cai Lai, Si-Jie Cheng, Jin Yan, Zhi-Xian Hong, Lin-Xiang Yu, Zhen-Yu Zhu, Pei-Rui Zhang, Zhao-Hai Wang, Xi-Liang Wang, Shao-Geng Zhang, Peng-Hui Yang
Long non-coding RNAs (lncRNAs) have been investigated as a novel class of regulators of cellular processes, including cell growth, apoptosis and carcinogenesis. lncRNA BRAF-activated non-protein coding RNA (BANCR) has recently been revealed to be involved in tumorigenesis of numerous types of cancer, including papillary thyroid carcinoma, melanoma, non-small cell lung cancer and colorectal cancer. However, the expression profiles and biological relevance of lncRNA BANCR in hepatocellular carcinoma (HCC) has not yet been reported...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29718723/sirna-drug-development-against-hepatitis-b-virus-infection
#19
Robert Flisiak, Jerzy Jaroszewicz, Mariusz Łucejko
Hepatitis B virus (HBV) infection is the worldwide leading cause of liver cirrhosis and hepatocellular carcinoma. Currently available medication can suppress viral replication in the majority of patients, but clearance of the viral antigens can be achieved in only about 10%. Areas covered: RNA interference is a very attractive therapeutic option since a well-designed compound could possibly inhibit all HBV mRNA and thus synthesis of all its antigens, which could combine antiviral and immunomodulatory modes of action...
May 8, 2018: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/29716597/hepatitis-e-virus-infection-in-turkey-a-systematic-review
#20
REVIEW
Hakan Leblebicioglu, Resat Ozaras
Hepatitis E virus (HEV), a non-enveloped single stranded RNA virus causes sporadic cases of hepatitis or outbreaks. The disease is generally self-limited although it may cause fulminant hepatitis in pregnant women, elderly, those with underlying chronic hepatitis, immunosuppressed, and transplant recipients. It is transmitted through fecal-oral route and zoonotic transmission. Hepatitis is a main health care problem in Turkey; HBV and HCV prevalences are 4 and 1% respectively. Hepatitis D represents another considerable hepatitis etiology with a prevalence of 5-27%...
May 2, 2018: Annals of Clinical Microbiology and Antimicrobials
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