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HBV IFN

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https://www.readbyqxmd.com/read/28072682/increasing-lag-3-expression-suppresses-t-cell-function-in-chronic-hepatitis-b-a-balance-between-immunity-strength-and-liver-injury-extent
#1
Bo Ye, Xuefen Li, Yuejiao Dong, Yiyin Wang, Li Tian, Sha Lin, Xia Liu, Haishen Kong, Yu Chen
Weak or absent virus-specific CD8 T-cell responses to hepatitis B virus (HBV) infection are thought to be responsible for persistent HBV infection. Previous studies have indicated that multiple inhibitory receptors, including lymphocyte activation gene-3 (LAG-3), can suppress the CD8 T-cell response in chronic viral infection. This study aimed to detect LAG-3 expression and to investigate the manner in which the immune response is regulated to balance the strength of the response with the extent of liver injury in chronic HBV infection...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28056087/mita-sting-and-its-alternative-splicing-isoform-mrp-restrict-hepatitis-b-virus-replication
#2
Shuhui Liu, Kaitao Zhao, Xi Su, Lu Lu, He Zhao, Xianwen Zhang, Yun Wang, Chunchen Wu, Jizheng Chen, Yuan Zhou, Xue Hu, Yanyi Wang, Mengji Lu, Xinwen Chen, Rongjuan Pei
An efficient clearance of hepatitis B virus (HBV) requires the coordinated work of both the innate and adaptive immune responses. MITA/STING, an adapter protein of the innate immune signaling pathways, plays a key role in regulating innate and adaptive immune responses to DNA virus infection. Previously, we identified an alternatively spliced isoform of MITA/STING, called MITA-related protein (MRP), and found that MRP could specifically block MITA-mediated interferon (IFN) induction while retaining the ability to activate NF-κB...
2017: PloS One
https://www.readbyqxmd.com/read/28041935/role-of-interleukin-23-in-monocyte-derived-dendritic-cells-of-hbv-related-acute-on-chronic-liver-failure-and-its-correlation-with-the-severity-of-liver-damage
#3
Suxia Bao, Jianming Zheng, Ning Li, Chong Huang, Mingquan Chen, Qi Cheng, Qian Li, Qing Lu, Mengqi Zhu, Qingxia Ling, Kangkang Yu, Shengshen Chen, Guangfeng Shi
BACKGROUND: The role of interleukin-23 (IL-23) in monocyte-derived dendritic cells (MoDCs) from hepatitis B virus-related acute-on-chronic liver failure (HBV-ACLF) patients remains unclear. The aim of this study was to observe the correlation between the activation of the IL-23 signaling pathway and the prognosis of HBV-ACLF patients. MATERIALS AND METHODS: The baseline levels of serum IL-6, IL-12, IL-17, IL-23, tumor necrosis factor-α (TNF-α), and interferon-γ (IFN-γ) from immune tolerant (IT), chronic hepatitis B (CHB), HBV-ACLF patients and healthy individuals who served as healthy controls (HCs) were analyzed using the Luminex system, whereas serum IL-23 from HBV-ACLF patients was measured by ELISA before and after treatment...
December 29, 2016: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28012259/reduction-in-liver-transplant-wait-listing-in-the-era-of-direct-acting-antiviral-therapy
#4
Jennifer A Flemming, W Ray Kim, Carol L Brosgart, Norah A Terrault
: Direct-acting antiviral (DAA) therapy, recently approved for patients with decompensated cirrhosis (DC) secondary to hepatitis C virus (HCV), is associated with improved hepatic function. We analyzed trends in liver transplant (LT) wait-listing (WL) to explore potential impact of effective medical therapy on WL registration. This is a cohort study using the Scientific Registry of Transplant Recipients database from 2003 to 2015. A total of 47,591 adults wait-listed for LT from HCV, hepatitis B virus (HBV), and nonalcoholic steatohepatitis (NASH) were identified...
November 5, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27975322/an-elispot-based-assay-to-measure-hbv-specific-cd8-t-cell-responses-in-immunocompetent-mice
#5
Tracy D Reynolds, Safiehkhatoon Moshkani, Michael D Robek
Despite some important limitations, immunocompetent mouse models of HBV replication remain an essential tool for studying cellular and humoral immunity to the virus. CD8(+) T cells are a critical component of the immune response to HBV due to their ability to both kill virus-infected hepatocytes and produce cytokines such as IFN-γ that non-cytopathically inhibit virus replication. A number of techniques can be used to measure the magnitude, specificity, and functionality of HBV-specific CD8(+) T cells, each having its own unique advantages...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27941937/nkp30-nk-cells-are-associated-with-hbv-control-during-pegylated-interferon-alpha-2b-therapy-of-chronic-hepatitis-b
#6
Xiaokun Shen, Binqing Fu, Yanyan Liu, Chuang Guo, Ying Ye, Rui Sun, Jiabin Li, Zhigang Tian, Haiming Wei
A pressing need exists for improved therapeutic options for chronic hepatitis B (CHB). Pegylated-interferon-alpha (Peg-IFN-α) achieves sustained off-treatment responses in many cases because of its direct anti-viral effects and regulation of the immune response. However, non-responsiveness to Peg-IFN-α is frequent, and the mechanism is poorly understood. In this study, we found that the frequency and absolute number of NKp30(+) natural killer (NK) cells increased markedly, accompanied by enhanced CD107a and IFN-γ production, during Peg-IFN-α-2b monotherapy or combination therapy with adefovir dipivoxil in patients with CHB, especially in responders...
December 12, 2016: Scientific Reports
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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...
January 2017: 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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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...
November 2016: Hepatology International
https://www.readbyqxmd.com/read/27630638/extracellular-vesicles-including-exosomes-regulate-innate-immune-responses-to-hepatitis-b-virus-infection
#20
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
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