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https://www.readbyqxmd.com/read/27895405/impact-of-il28b-and-oas-gene-family-polymorphisms-on-interferon-treatment-response-in-caucasian-children-chronically-infected-with-hepatitis-b-virus
#1
Krzysztof Domagalski, Małgorzata Pawłowska, Agnieszka Zaleśna, Małgorzata Pilarczyk, Paweł Rajewski, Waldemar Halota, Andrzej Tretyn
AIM: To investigate the impact of IL28B and OAS gene polymorphisms on interferon treatment responses in children with chronic hepatitis B. METHODS: We enrolled 52 children (between the ages of 4 and 18) with hepatitis B e antigen-negative chronic hepatitis B (CHB), who were treated with pegylated interferon alfa for 48 wk. Single nucleotide polymorphisms in the OAS1 (rs1131476), OAS2 (rs1293747), OAS3 (rs2072136), OASL (rs10849829) and IL28B (rs12979860, rs12980275 and rs8099917) genes were studied to examine their associations with responses to IFN treatment in paediatric patients...
November 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27885748/protective-efficacy-and-hepatitis-b-virus-clearance-in-mice-enhanced-by-cell-mediated-immunity-with-novel-prime-boost-regimens
#2
X Chuai, P Chen, H Chen, W Wang, Y Deng, L Ruan, W Li, W Tan
In this study, anti-hepatitis B virus (HBV) immunity was evaluated in mice using several regimens of the HBV recombinant protein vaccine HBSS1 that expressed in CHO cells containing S (1-223 aa) and preS1 (21-47 aa) and recombinant adenovirus rAdSS1 vaccine. Further, the protective efficacy of these vaccine regimens was studied in a mouse model. High titres of antigen-specific antibodies and neutralizing activity were elicited in mice after vaccination. However, robust multi-antigen (preS1 and S)-specific cell-mediated immunity (CMI) was only detected in mice primed with HBSS1 and boosted with rAdSS1...
November 25, 2016: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/27867263/interferon-stimulated-gene-15-conjugation-stimulates-hepatitis-b-virus-production-independent-of-type-i-interferon-signaling-pathway-in-vitro
#3
Yujia Li, Shilin Li, Xiaoqiong Duan, Yanzhao Chen, Baihai Jiao, Haiyan Ye, Min Yao, Limin Chen
Hepatitis B virus (HBV) is an important account of infectious hepatitis and interferon (IFN) remains one of the best treatment options. Activation of type I IFN signaling pathway leads to expressions of IFN-stimulated genes (ISGs) which play important roles in antiviral and immunomodulatory responses to HBV or hepatitis C virus (HCV) infection. Our previous studies indicated that ISG15 and its conjugation (ISGylation) were exploited by HCV to benefit its replication and persistent infection. This study was designed to assess the role of ISG15 and ISGylation in HBV infection in vitro...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27819342/minicircle-hbv-cccdna-with-a-gaussia-luciferase-reporter-for-investigating-hbv-cccdna-biology-and-developing-cccdna-targeting-drugs
#4
Feng Li, Liang Cheng, Christopher M Murphy, Natalia J Reszka-Blanco, Yaxu Wu, Liqun Chi, Jianming Hu, Lishan Su
Chronic Hepatitis B Virus (HBV) infection is generally not curable with current anti-viral drugs. Virus rebounds after stopping treatment from the stable HBV covalently-closed-circular DNA (cccDNA). The development of drugs that directly target cccDNA is hampered by the lack of robust HBV cccDNA models. We report here a novel HBV cccDNA technology that will meet the need. We engineered a minicircle HBV cccDNA with a Gaussia Luciferase reporter (mcHBV-GLuc cccDNA), which serves as a surrogate to measure cccDNA activity...
November 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27800132/interferon-gamma-gene-polymorphism-874-t-a-and-chronic-hepatitis-b-in-the-population-of-gorgan-north-eastern-iran
#5
Nadia Ghasemian, Majid Shahbazi
BACKGROUND: Based on differences in individual immune responses to the hepatitis B virus (HBV), between 5% and 10% of patients become persistently infected with the virus, which leads to the determination of chronic HBV. Cytokines such as interferon gamma (IFN-γ) are secretory proteins that play important roles in both innate and adaptive immune responses. Functional studies have demonstrated that the IFN + 874A/T gene polymorphism can increase or decrease the overall expression of IFN-gamma (γ) and ultimately determine the outcome of the infection...
August 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/27799218/tlr7-agonist-gs-9620-is-a-potent-inhibitor-of-acute-hiv-1-infection-in-human-peripheral-blood-mononuclear-cells
#6
Rujuta A Bam, Derek Hansen, Alivelu Irrinki, Andrew Mulato, Gregg S Jones, Joseph Hesselgesser, Christian R Frey, Tomas Cihlar, Stephen R Yant
GS-9620 is a potent and selective oral Toll-like receptor 7 (TLR7) agonist that directly activates plasmacytoid dendritic cells (pDCs). GS-9620 suppressed hepatitis B virus (HBV) in animal models of chronic infection and transiently activated HIV expression ex vivo in latently-infected peripheral blood mononuclear cells (PBMCs) from virally suppressed patients. Currently, GS-9620 is under clinical evaluation for treating chronic HBV infection and for reducing latent reservoirs in virally-suppressed HIV-infected patients...
October 31, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27793564/role-of-hbsag-decline-in-patients-with-chronic-hepatitis-b-hbeag-negative-and-e-genotype-treated-with-pegylated-interferon
#7
Lucio Boglione, Jessica Cusato, Giuseppe Cariti, Giovanni Di Perri, Antonio D'Avolio
Treatment options for patients with chronic hepatitis B (CHB) and hepatitis B e antigen (HBeAg)-negative are pegylated interferon alfa-2a (PEG-IFN) for 48 weeks or nucleos(t)ide analogues (NAs). The choice of patients with higher chance of sustained response (SR) to PEG-IFN can be made with pre-treatment and on-treatment factors; recent studies evidenced the role of early drop of serum hepatitis B surface antigen (HBsAg) as predictor of SR. The aim of this study was the evaluation of early decrease of HBsAg on the SR in HBeAg-negative patients with E genotype...
October 26, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27789659/induction-of-ifn-%C3%AE-3-as-an-additional-effect-of-nucleotide-not-nucleoside-analogues-a-new-potential-target-for-hbv-infection
#8
Kazumoto Murata, Mai Asano, Akihiro Matsumoto, Masaya Sugiyama, Nao Nishida, Eiji Tanaka, Taisuke Inoue, Minoru Sakamoto, Nobuyuki Enomoto, Takayoshi Shirasaki, Masao Honda, Shuichi Kaneko, Hiroyuki Gatanaga, Shinichi Oka, Yuki I Kawamura, Taeko Dohi, Yasutaka Shuno, Hideaki Yano, Masashi Mizokami
OBJECTIVE: The clinical significance of polymorphisms in the interleukin-28B gene encoding interferon (IFN)-λ3, which has antiviral effects, is known in chronic HCV but not in HBV infection. Thus, we measured IFN-λ3 levels in patients with HBV and investigated its clinical significance and association with nucleos(t)ide (NUC) analogue administration. DESIGN: Serum IFN-λ3 level was measured in 254 patients with HBV with varying clinical conditions using our own high sensitivity method...
October 27, 2016: Gut
https://www.readbyqxmd.com/read/27771387/hdv-rna-replication-is-associated-with-hbv-repression-and-interferon-stimulated-genes-induction-in-super-infected-hepatocytes
#9
Dulce Alfaiate, Julie Lucifora, Natali Abeywickrama-Samarakoon, Maud Michelet, Barbara Testoni, Jean-Claude Cortay, Camille Sureau, Fabien Zoulim, Paul Dény, David Durantel
Hepatitis D virus (HDV) super-infection of Hepatitis B virus (HBV)-infected patients is the most aggressive form of viral hepatitis. HDV infection is not susceptible to direct anti-HBV drugs, and only suboptimal antiviral responses are obtained with interferon (IFN)-alpha-based therapy. To get insights on HDV replication and interplay with HBV in physiologically relevant hepatocytes, differentiated HepaRG (dHepaRG) cells, previously infected or not with HBV, were infected with HDV, and viral markers were extensively analyzed...
October 19, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27763680/humoral-and-cellular-responses-to-a-single-dose-of-fendrix-in-renal-transplant-recipients-with-non-response-to-previous-hepatitis-b-vaccination
#10
Monika Lindemann, Marina Zaslavskaya, Melanie Fiedler, Benjamin Wilde, Falko M Heinemann, Andreas Heinold, Peter A Horn, Oliver Witzke
Approximately 70% of kidney transplant recipients are non-responders to conventional hepatitis B virus (HBV) vaccines. We examined whether Fendrix(™) , an HBV vaccine containing 3-O-desacyl-4'-monophosphoryl lipid A (MPL) as adjuvant, could induce HBV immunity in these patients and compared their vaccination efficacy with healthy controls tested previously by the same assays. We selected 35 kidney transplant recipients who had been vaccinated at least thrice against HBV but had never displayed anti-HBs antibodies...
October 20, 2016: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/27761441/hepatitis-b-progress-in-understanding-chronicity-the-innate-immune-response-and-cccdna-protection
#11
REVIEW
Kenichi Morikawa, Tomoe Shimazaki, Rei Takeda, Takaaki Izumi, Machiko Umumura, Naoya Sakamoto
Hepatitis B virus (HBV) infection is a serious health threat around the world. Despite the availability of an effective hepatitis B vaccine, the number of HBV carriers is estimated to be as high as 240 million worldwide. Global mortality due to HBV-related liver diseases such as chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma (HCC) may be as high as 1 million deaths per year. HBV is transmitted via blood and body fluids, and is much more infectious than both human immunodeficiency virus (HIV) and hepatitis C virus...
September 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27742005/interferon-treatment-for-hepatitis-b
#12
Monica A Konerman, Anna S Lok
Chronic hepatitis B virus (HBV) infection has a significant public health impact. There are currently 7 approved therapies for chronic HBV, including standard and pegylated interferon (IFN)-α, and 5 nucleos(t)ide analogs (NUCs). IFN offers benefits over NUCs, including a finite duration of therapy and a higher rate of clearance of hepatitis Be antigen and surface antigen. These benefits need to be weighed against the potential adverse effects of IFN therapy. Some patients should not receive IFN because of advanced liver disease or comorbidities...
November 2016: Clinics in Liver Disease
https://www.readbyqxmd.com/read/27658394/functionally-aberrant-dendritic-cell-subsets-and-expression-of-dc-sign-differentiate-acute-from-chronic-hbv-infection
#13
Sukriti Sukriti, Nirupma Trehanpati, Manoj Kumar, Chandana Pande, Syed S Hissar, Shiv Kumar Sarin
BACKGROUND: Dendritic cells (DCs) promote pathogen recognition, uptake and presentation of antigen through DC-specific intercellular adhesion molecule 3-grabbing non-integrin (DC-SIGN) and toll-like receptors (TLRs). AIMS AND OBJECTIVES: We aimed to study temporal changes in DCs, TLRs and DC-SIGN during acute viral hepatitis B (AVHB) infection and compare them to chronic (CHB) and to investigate the earliest time point of activated pathogen recognition receptors in hepatitis B viral infection...
September 22, 2016: Hepatology International
https://www.readbyqxmd.com/read/27630638/extracellular-vesicles-including-exosomes-regulate-innate-immune-responses-to-hepatitis-b-virus-infection
#14
Takahisa Kouwaki, Yoshimi Fukushima, Takuji Daito, Takahiro Sanada, Naoki Yamamoto, Edin J Mifsud, Chean Ring Leong, Kyoko Tsukiyama-Kohara, Michinori Kohara, Misako Matsumoto, Tsukasa Seya, Hiroyuki Oshiumi
UNLABELLED: The innate immune system is essential for controlling viral infection. Hepatitis B virus (HBV) persistently infects human hepatocytes and causes hepatocellular carcinoma. However, the innate immune response to HBV infection in vivo remains unclear. Using a tree shrew animal model, we showed that HBV infection induced hepatic interferon (IFN)-γ expression during early infection. Our in vitro study demonstrated that hepatic NK cells produced IFN-γ in response to HBV only in the presence of hepatic F4/80(+) cells...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27626689/interferon-stimulated-gene-of-20-kda-protein-isg20-degrades-rna-of-hepatitis-b-virus-to-impede-the-replication-of-hbv-in-vitro-and-in-vivo
#15
Chean Ring Leong, Kenji Funami, Hiroyuki Oshiumi, Deng Mengao, Hiromi Takaki, Misako Matsumoto, Hussein H Aly, Koichi Watashi, Kazuaki Chayama, Tsukasa Seya
Hepatitis B virus (HBV) barely induces host interferon (IFN)-stimulated genes (ISGs), which allows efficient HBV replication in the immortalized mouse hepatocytes as per human hepatocytes. Here we found that transfection of Isg20 plasmid robustly inhibits the HBV replication in HBV-infected hepatocytes irrespective of IRF3 or IFN promoter activation. Transfection of Isg20 is thus effective to eradicate HBV in the infected hepatocytes. Transfection of HBV genome or ε-stem of HBV pgRNA (active pgRNA moiety) failed to induce Isg20 in the hepatocytes, while control polyI:C (a viral dsRNA analogue mimic) activated MAVS pathway leading to production of type I IFN and then ISGsg20 via the IFN-α/β receptor (IFNAR)...
September 8, 2016: Oncotarget
https://www.readbyqxmd.com/read/27595449/antibodies-to-hbv-surface-antigen-in-relation-to-interferon-%C3%AE-3-in-hemodialysis-patients
#16
Alicja E Grzegorzewska, Monika K Świderska, Adrianna Mostowska, Wojciech Warchoł, Paweł P Jagodziński
AIM: To investigate circulating IFN-λ3 and IFNL3 polymorphisms in hemodialysis (HD) patients differing in HBV surface antigen antibody (anti-HBs) production. METHODS: The study included 106 HBV-vaccinated HD patients (88 developed anti-HBs) and 36 HBV-infected HD subjects (27 developed anti-HBs). Plasma IFN-λ3 (enzyme-linked immunosorbent assay) and rs12979860 (C>T) and rs8099917 (T>G) in IFNL3 (high-resolution melting curve analysis) were analyzed with regard to the association with anti-HBs production in response to HBV vaccination or infection...
September 22, 2016: Vaccine
https://www.readbyqxmd.com/read/27577976/hepatitis-b-core-related-antigen-kinetics-in-chronic-hbv-genotype-d-infected-patients-treated-with-nucleos-t-ide-analogues-or-pegylated-interferon-%C3%AE
#17
G P Caviglia, M L Abate, D Noviello, A Olivero, C Rosso, G Troshina, A Ciancio, M Rizzetto, G M Saracco, A Smedile
AIM: To evaluate Hepatitis B core-related antigen (HBcrAg) correlation with HBV DNA and hepatitis B surface antigen (HBsAg) levels and to investigate HBcrAg kinetic during nucleos(t)ide analogues (NAs) or pegylated-interferon (PEG-IFN)-α treatment in a cohort of chronic hepatitis B (CHB)-genotype-D patients. METHODS: One-hundred-thirty-eight sequential serum samples were collected from 28 Hepatitis B e antigen (HBeAg)-negative CHB-genotype-D patients (20 M/8 F; median age 54 [47-58] years), who underwent NAs (n = 20) or PEG-IFN-α (n = 8) treatment...
August 30, 2016: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/27555302/intrahepatic-nk-cells-function-suppressed-in-advanced-liver-fibrosis
#18
Xiaoyan Li, Min Zhang, Jing Liu, Zhanlian Huang, Qiyi Zhao, Yuehua Huang, Xu Li, Zhiliang Gao
BACKGROUND: Although numerous epidemiological studies indicate that hepatitis B virus-related liver fibrosis (HBV-LF), particularly cirrhosis, represents the main risk factor for liver cancer development, the mechanisms determining the persistence of fibrosis and liver cancer pathogenesis are still poorly defined. Few studies have investigated the status of NK cells during different stages of HBV-LF. METHODS: Liver tissues at least 3 cm away from the tumour site and peripheral blood were obtained simultaneously from 32 HBV-infected patients undergoing surgery for HCC at the medical centre of Sun Yat-sen University...
October 2016: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27552102/antiviral-efficacy-and-host-innate-immunity-associated-with-sb-9200-treatment-in-the-woodchuck-model-of-chronic-hepatitis-b
#19
Kyle E Korolowicz, Radhakrishnan P Iyer, Stefanie Czerwinski, Manasa Suresh, Junming Yang, Seetharamaiyer Padmanabhan, Anjaneyulu Sheri, Rajendra K Pandey, Jeffrey Skell, Judith K Marquis, Bhaskar V Kallakury, Robin D Tucker, Stephan Menne
SB 9200, an oral prodrug of the dinucleotide SB 9000, is being developed for the treatment of chronic hepatitis B virus (HBV) infection and represents a novel class of antivirals. SB 9200 is thought to activate the viral sensor proteins, retinoic acid-inducible gene 1 (RIG-I) and nucleotide-binding oligomerization domain-containing protein 2 (NOD2) resulting in interferon (IFN) mediated antiviral immune responses in virus-infected cells. Additionally, the binding of SB 9200 to these sensor proteins could also sterically block the ability of the viral polymerase to access pre-genomic RNA for nucleic acid synthesis...
2016: PloS One
https://www.readbyqxmd.com/read/27547127/review-of-laboratory-tests-used-in-monitoring-hepatitis-b-response-to-pegylated-interferon-and-nucleos-t-ide-analog-therapy
#20
Carla Osiowy, Carla Coffin, Anton Andonov
There are only two currently approved classes of hepatitis B virus (HBV) antiviral agents, pegylated interferon (Peg-IFN), and nucleos(t)ide analogs (NAs) for chronic HBV infection. Although Peg-IFN is used for a finite 48-week duration and offers a greater chance of sustained off-treatment virological response, it is poorly tolerated and can only be offered to selected patients. The NAs are well tolerated but require prolonged therapy due to risk of relapse with treatment cessation. There is evolving data that novel virological assays (e...
2016: Current Treatment Options in Infectious Diseases
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