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https://www.readbyqxmd.com/read/28223128/a-screening-assay-for-the-identification-of-host-cell-requirements-and-antiviral-targets-for-hepatitis-d-virus-infection
#1
Bettina Buchmann, Katinka Döhner, Thomas Schirdewahn, Beate Sodeik, Michael P Manns, Heiner Wedemeyer, Sandra Ciesek, Thomas von Hahn
Hepatitis delta virus (HDV) is a minimalistic satellite virus of hepatitis B virus (HBV). HBV/HDV co-infection, i.e. "hepatitis D", is the most severe form of viral hepatitis. No effective therapy for HDV infection is available partly due to the fact that HDV is a highly host-dependent virus devoid of any potentially drugable enzyme encoded in its small genome. In this study we present a semi-automated method to evaluate HDV infection and replication under the influence of different drugs. We utilized a Huh-7/hNTCP cell culture based system in a 96-well plate format, an automated microscope and image acquisition as well as analysis with the CellProfiler software to quantify the impact of these drugs on HDV infection...
February 18, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28218976/differential-expression-of-innate-immune-response-genes-in-clinical-phases-of-chronic-hepatitis-b-infection
#2
Sara Romani, Seyed Masoud Hosseini, Seyed Reza Mohebbi, Andre Boonstra, Afsaneh Sharifian
We investigated innate immune gene expression in clinical phases of Chronic Hepatitis B infection, including immune tolerant (IT); immune active (IA); inactive carrier (IC); and hepatitis B e antigen (HBeAg)-negative phases, as well as healthy controls. Expression levels of interferon types I, II, and III, their receptor subunits, IRFs, TLRs and other IFN-induced genes in peripheral blood mononuclear cells were compared.Forty HBsAg-positive treatment-naïve subjects without co-infection with HIV, HCV or HDV were enrolled...
February 20, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28218868/-diagnosis-and-treatment-of-chronic-hepatitis-b-and-d-national-consensus-guideline-in-hungary-from-15-october-2016
#3
Gábor Horváth, Zsuzsanna Gerlei, Judit Gervain, Gabriella Lengyel, Mihály Makara, Alajos Pár, László Rókusz, Ferenc Szalay, István Tornai, Klára Werling, Béla Hunyady
Diagnosis and treatment of HBV/HDV infection means for the patient to be able to maintain working capacity, to increase quality of life, to prevent cancer, and to prolong life expectancy, while society benefits from eliminating the chances of further transmission of the viruses, and decreasing the overall costs of serious complications. The guideline delineates the treatment algorithms for 2017 set by a consensus meeting of physicians involved in the treatment of these diseases. The prevalence of HBV infection in the Hungarian general population is 0...
February 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28213271/woodchuck-sodium-taurocholate-cotransporting-polypeptide-supports-low-level-hepatitis-b-and-d-virus-entry
#4
Liran Fu, Hongjie Hu, Yang Liu, Zhiyi Jing, Wenhui Li
Sodium taurocholate cotransporting polypeptide (NTCP) is the functional receptor for human hepatitis B virus (HBV) and its satellite hepatitis D virus (HDV). Species barriers to HBV/HDV infection are mainly determined at entry level by variations in the sequences of particular NTCP orthologs. In this study, we sought to determine whether the NTCP ortholog in woodchuck (Marmota monax), woodchuck NTCP (wNTCP) supports viral infection. We found that wNTCP is capable of supporting HBV/HDV infection in HepG2 cells, but to much lower extent than human NTCP (hNTCP), which is about 90% reduction of hNTCP...
February 14, 2017: Virology
https://www.readbyqxmd.com/read/28202897/dual-infection-with-hepatitis-b-and-epstein-barr-virus-presenting-with-severe-jaundice-coagulopathy-and-hepatitis-b-virus-chronicity-outcome
#5
Sirish C Rao, Imran Ashraf, Fazia Mir, Sami Samiullah, Jamal A Ibdah, Veysel Tahan
BACKGROUND Hepatitis B virus (HBV) has been reported as a coinfection with hepatitis C virus (HCV), hepatitis D virus (HDV), cytomegalovirus (CMV), and human immunodeficiency virus (HIV). CASE REPORT A 34-year-old female presented to our clinic with epigastric pain and severe acute hepatitis manifested as jaundice associated with hyperbilirubinemia, elevated transaminases, and coagulopathy. The patient was diagnosed with acute HBV with Epstein-Barr virus (EBV) coinfection leading to subsequent chronic hepatitis B...
February 16, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28202798/high-prevalence-and-diversity-of-hepatitis-viruses-in-suspected-cases-of-yellow-fever-in-the-democratic-republic-of-congo
#6
Sheila Makiala-Mandanda, Frédéric Le Gal, Nadine Ngwaka-Matsung, Steve Ahuka-Mundeke, Richard Onanga, Berthold Bivigou-Mboumba, Elisabeth Pukuta-Simbu, Athenaïs Gerber, Jessica L Abbate, Dieudonné Mwamba, Nicolas Berthet, Eric Maurice Leroy, Jean-Jacques Muyembe-Tamfum, Pierre Becquart
The majority of patients with acute febrile jaundice (>95%) identified through a yellow fever surveillance program in the Democratic Republic of Congo (DRC) test negative for antibodies against yellow fever virus. However, no etiological investigation has ever been carried out on these patients. Here, we tested for hepatitis A (HAV), B (HBV), C (HCV), D (HDV) and E (HEV) viruses, all of which can cause acute febrile jaundice, in patients included in the yellow fever surveillance program in the DRC. On a total of 498 serum samples collected from suspected cases of yellow fever from January 2003 to January 2012, ELISA techniques were used to screen for antibodies against HAV (IgM) and HEV (IgM) and for antigens and antibodies against HBV (HBsAg and anti-HBc IgM), HCV and HDV...
February 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28195359/sodium-taurocholate-cotransporting-polypeptide-is-the-limiting-host-factor-of-hepatitis-b-virus-infection-in-macaque-and-pig-hepatocytes
#7
Florian A Lempp, Ellen Wiedtke, Bingqian Qu, Pierre Roques, Isabelle Chemin, Florian W R Vondran, Roger Le Grand, Dirk Grimm, Stephan Urban
: Infections with the human Hepatitis B (HBV) and Hepatitis D Virus (HDV) depend on species-specific host factors like the receptor human sodium taurocholate cotransporting polypeptide hNTCP. Complementation of mouse hepatocytes with hNTCP confers susceptibility to HDV but not HBV indicating the requirement of additional HBV-specific factors. As an essential premise towards the establishment for an HBV-susceptible animal model, we investigated the role of hNTCP as a limiting factor of hepatocytes in commonly used laboratory animals...
February 13, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28141591/impact-of-interleukin-28b-rs12979860-c-t-polymorphism-on-severity-of-disease-and-response-to-treatment-in-hepatitis-delta
#8
Murat Ispiroglu, Ibrahim Halil Bahcecioglu, Ulvi Demirel, Mehmet Yalniz
INTRODUCTION: Pegylated-interferon alpha (Peg-IFN α) is the therapy most commonly used to treat chronic hepatitis delta virus (HDV) infection. In the present study, we planned to investigate effect of IL28B polymorphism on response to Peg-IFN α therapy and disease progression in patients with chronic HDV. METHODOLOGY: A total of 47 patients who received Peg-IFNα therapy for at least one year were investigated. The patients were divided into three groups based on their response to treatment: sustained viral response (SVR) (32%), unresponsive (53%), and relapse (15%)...
January 30, 2017: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28126507/-hepatitis-delta-clinical-aspects-and-therapeutic-perspectives
#9
Dulce Alfaiate, Clothilde Miaglia, Fabien Zoulim
HDV prevalence must not be disregarded, as the virus is associated with a higher severity of hepatic disease. All HBV carriers should be tested for HDV as well, at least once during the disease history, and in case of worsening of a chronic HBV hepatitis. Diagnosis should rely on anti-HDV antibody testing, and confirmed by HDV RNA detection and quantification by RT-qPCR. The only treatment available is pegylated alpha interferon. Optimal duration of treatment has not yet been proven, and relapses are common...
January 23, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28121714/hepatitis-delta-and-hiv-infection
#10
Vincent Soriano, Kenneth E Sherman, Pablo Barreiro
Viral liver diseases are frequent co-morbidities and major contributors to death in HIV-positive individuals on antiretroviral therapy. Whereas cure of hepatitis C and control of hepatitis B with antivirals avert liver disease progression in most HIV-coinfected patients, the lack of satisfactory treatment for hepatitis delta virus (HDV) infection remains a major threat for developing cirrhosis and liver cancer in this population. In the European Union and North America, sexual contact has replaced injection drug use has major transmission route for HDV in HIV-positive persons...
January 24, 2017: AIDS
https://www.readbyqxmd.com/read/28109755/construction-of-agrobacterium-tumefaciens-mediated-tomato-black-ring-virus-infectious-cdna-clones
#11
Aleksandra Zarzyńska-Nowak, Inmaculada Ferriol, Bryce W Falk, Natasza Borodynko-Filas, Beata Hasiów-Jaroszewska
Tomato black ring virus (TBRV, genus Nepovirus) infects a wide range of economically important plants such as tomato, potato, tobacco and cucumber. Here, a successful construction of infectious full-length cDNA clones of the TBRV genomic RNAs (RNA1 and RNA2) is reported for the first time. The engineered constructs consisting of PCR-amplified DNAs were cloned into binary vector pJL89 immediately downstream of a double cauliflower mosaic virus (CaMV) 35S promoter, and upstream of the hepatitis delta virus (HDV) ribozyme and nopaline synthase terminator (NOS)...
January 18, 2017: Virus Research
https://www.readbyqxmd.com/read/28104130/recurrent-hepatitis-b-and-d-virus-infection-in-a-liver-transplant-recipient
#12
H Miyaaki, Y Tamada, K Hayashi, N Taura, S Miuma, H Shibata, A Soyama, M Hidaka, M Takatsuki, S Eguchi, K Nakao
Hepatitis B virus (HBV) and hepatitis delta virus (HDV) co-infections progress rapidly and lead to cirrhosis. In Japan, the prevalence of HBV and HDV co-infected patients is low. Therefore, there are few reports of patients with HBV and HDV co-infection having undergone liver transplantation. Herein, we report a rare case of recurrence of HBV and HDV in a 41-year-old man who underwent living donor liver transplantation 4 years prior.
January 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28092214/treatment-of-delta-hepatitis-today-and-in-the-future-a-review
#13
REVIEW
Ibrahim Halil Bahcecioglu, Abdurrahman Sahin
Hepatitis delta virus (HDV) is a defective satellite virus and propagates in the presence of Hepatitis B virus (HBV) surface antigen (HBsAg). Approximately 5% of the people who infected with HBV are also infected with HDV. Chronic hepatitis caused by delta is the most severe form of chronic viral hepatitis including accelerated fibrosis, liver decompensation and development of hepatocellular carcinoma. Interferon-based therapies still remain the only treatment option of the hepatitis delta. The beneficiary effects of the interferon-based therapies, however, stop frequently with termination of the given therapy and relapse rate is very high...
April 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28079152/a-novel-toolbox-for-the-in-vitro-assay-of-hepatitis-d-virus-infection
#14
Jing-Hua Zhao, Ya-Li Zhang, Tian-Ying Zhang, Lun-Zhi Yuan, Tong Cheng, Pei-Jer Chen, Quan Yuan, Ning-Shao Xia
Hepatitis D virus (HDV) is a defective RNA virus that requires the presence of hepatitis B virus (HBV) for its life cycle. The in vitro HDV infection system is widely used as a surrogate model to study cellular infection with both viruses owing to its practical feasibility. However, previous methods for running this system were less efficient for high-throughput screening and large-scale studies. Here, we developed a novel method for the production of infectious HDV by adenoviral vector (AdV)-mediated transduction...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27993129/hepatitis-viruses-in-ethiopia-a-systematic-review-and-meta-analysis
#15
Yeshambel Belyhun, Melanie Maier, Andargachew Mulu, Ermias Diro, Uwe Gerd Liebert
BACKGROUND: The existing seroepidemiological data on viral hepatitis in Ethiopia showed a wide variation in prevalence pattern and the clinical and public health burden have been underestimated. The aim of this systematic review and meta-analysis was to provide a clear and comprehensive estimation of viral hepatitis epidemiology and the potential clinical burdens in Ethiopia. METHODS: A comprehensive literature search was carried out from five decades (1968-2015) published studies from biomedical databases; PubMed, Google scholar, Medline and Web of Science...
December 19, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27975305/live-cell-imaging-confocal-microscopy-analysis-of-hbv-myr-pres1-peptide-binding-and-uptake-in-ntcp-gfp-expressing-hepg2-cells
#16
Alexander König, Dieter Glebe
To obtain basic knowledge about specific molecular mechanisms involved in the entry of pathogens into cells is the basis for establishing pharmacologic substances blocking initial viral binding, infection, and subsequent viral spread. Lack of information about key cellular factors involved in the initial steps of HBV infection has hampered the characterization of HBV binding and entry for decades. However, recently, the liver-specific sodium-dependent taurocholate cotransporting polypeptide (NTCP) has been discovered as a functional receptor for HBV and HDV, thus opening the field for new concepts of basic binding and entry of HBV and HDV...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27975304/hepatitis-b-virus-infection-of-heparg-cells-heparg-hntcp-cells-and-primary-human-hepatocytes
#17
Yi Ni, Stephan Urban
Investigations of virus-host interactions rely on suitable in vitro cell culture systems that efficiently support virus infection. Such systems should ideally provide conditions that resemble those of natural host cells, e.g., the cell-type specific signaling and metabolic pathways. For HBV infection, primary human hepatocytes (PHHs) are the most faithful system fulfilling these requirements but access to these cells is limited. Moreover, the reproducibility of experimental results depends on many factors including the preparation method or variability of the donors...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27902514/prevalence-and-epidemiology-of-hepatitis-d-among-patients-with-chronic-hepatitis-b-virus-infection-a-report-from-northern-spain
#18
Carlos Ordieres, Carmen A Navascués, María L González-Diéguez, Mercedes Rodríguez, Valle Cadahía, María Varela, Luis Rodrigo, Manuel Rodríguez
BACKGROUND: The incidence of hepatitis delta virus (HDV) infection has decreased during the last decades. However, an increasing trend has been reported recently. PATIENTS AND METHODS: We carried out a case-control study to analyze changes in its prevalence in 1215 chronic hepatitis B virus (HBV) patients, diagnosed consecutively in a tertiary center, between 1983 and 2012. According to the year of diagnosis, patients were distributed into two groups: A [1983-1997 (n=786)] and B [1998-2012 (n=429)]...
March 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27894309/analysis-of-long-noncoding-rna-expression-in-hepatocellular-carcinoma-of-different-viral-etiology
#19
Quan Zhang, Kentaro Matsuura, David E Kleiner, Fausto Zamboni, Harvey J Alter, Patrizia Farci
BACKGROUND: Dysregulation of long noncoding RNA (lncRNA) expression contributes to the pathogenesis of many human diseases, including liver diseases. Several lncRNAs have been reported to play a role in the development of hepatocellular carcinoma (HCC). However, most studies have analyzed lncRNAs only in hepatitis B virus (HBV)-related HCC or in a single group of HCC patients regardless of the viral etiology. METHODS: To investigate whether lncRNAs are differentially expressed in HCC of different viral etiology, we profiled 101 disease-related lncRNAs, including 25 lncRNAs previously associated with HCC, in liver specimens obtained from well-characterized patients with HBV-, hepatitis C virus (HCV)-, or hepatitis D virus (HDV)-associated HCC...
November 28, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27881614/performance-characteristics-of-a-new-consensus-commercial-kit-for-hepatitis-d-virus-rna-viral-load-quantification
#20
Frédéric Le Gal, Samira Dziri, Athenaïs Gerber, Chakib Alloui, Zahia Ben Abdesselam, Dominique Roulot, Ségolène Brichler, Emmanuel Gordien
Hepatitis D virus (HDV) is responsible for fulminant hepatitis and liver failure and accelerates evolution toward cirrhosis and hepatocellular carcinoma in hepatitis B virus (HBV)-infected patients. To date, treatment relies upon long-term administration of pegylated alpha-interferon with a sustained virological response in 30% of the patients. Very recently, new, promising anti-HDV therapies have been developed and are already being used in clinical trials. HDV RNA viral load (HDVL) monitoring must be an integral part of the management of the infected patients...
February 2017: Journal of Clinical Microbiology
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