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Hepatitis B genetics

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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
#1
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/29211835/massive-iatrogenic-outbreak-of-human-immunodeficiency-virus-type-1-in-rural-cambodia-2014-2015
#2
François Rouet, Janin Nouhin, Du-Ping Zheng, Benjamin Roche, Allison Black, Sophearot Prak, Marie Leoz, Catherine Gaudy-Graffin, Laurent Ferradini, Chandara Mom, Sovatha Mam, Charlotte Gautier, Gérard Lesage, Sreymom Ken, Kerya Phon, Alexandra Kerleguer, Chunfu Yang, William Killam, Masami Fujita, Chhivun Mean, Didier Fontenille, Francis Barin, Jean-Christophe Plantier, Trevor Bedford, Artur Ramos, Vonthanak Saphonn
Background: In 2014-2015, 242 individuals aged 2-89 were newly HIV-1 diagnosed in Roka, a rural commune in Cambodia. A case-control study attributed the outbreak to unsafe injections. We aimed to reconstruct the likely transmission history of the outbreak. Methods: We assessed in 209 (86.4%) HIV-infected cases the presence of hepatitis C and B viruses (HCV, HBV). We identified recent infections using antibody (Ab) avidity testing for HIV and HCV, and HBcIgM Ab for HBV...
December 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29205714/genetic-variants-in-ntcp-exon-gene-are-associated-with-hbv-infection-status-in-a-chinese-han-population
#3
Wennan Wu, Yongbin Zeng, Jinpiao Lin, Yingying Wu, Tianbin Chen, Zhen Xun, Qishui Ou
OBJECTIVE: Sodium taurocholate co-transporting polypeptide (NTCP) plays an important role in the enterohepatic circulation of bile acids. Recently, NTCP was identified as a hepatitis B virus (HBV) receptor. The aim of this study is to investigate the association of NTCP polymorphisms with HBV clinical outcomes and investigate the relationship between NTCP polymorphisms and the serum bile acid level in Chinese Han population. METHODS: The single nucleotide polymorphisms (SNPs), rs2296651 and rs4646285, were genotyped in 1619 Chinese Han individuals...
December 4, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29199597/hepatocellular-carcinoma-and-possible-chemical-and-biological-causes-a-review
#4
Pinar Erkekoglu, Didem Oral, Ming-Wei Chao, Belmar Kocer-Gumusel
The development of hepatocellular carcinoma (HCC) is a multistep process. In HCC, progressive and morphologically distinct preneoplastic lesions/alterations associated with chronic liver injury, inflammation, hepatocellular degeneration/regeneration, necrosis, and small-cell dysplasia can be observed. The incidence of HCC exhibits regional and ethnic differences. Several cytotoxic and DNA-damaging chemicals are suggested to be the underlying causes of HCC-for example, acrylamide, perfluorooctanoic acid (PFOA), polychlorinated biphenyls (PCBs), benzo(a)pyrene (BaP), perfluorinated chemicals (PFCs), vinyl chloride monomer (VCM), and dietary contaminants (aflatoxins, ochratoxins)...
2017: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/29188175/current-progress-of-virus-mimicking-nanocarriers-for-drug-delivery
#5
REVIEW
Masaharu Somiya, Qiushi Liu, Shun'ichi Kuroda
Nanomedicines often involve the use of nanocarriers as a delivery system for drugs or genes for maximizing the therapeutic effect and/or minimizing the adverse effect. From drug administration to therapeutic activity, nanocarriers must evade the host's immune system, specifically and efficiently target and enter the cell, and release their payload into the cell cytoplasm by endosomal escape. These processes constitute the early infection stage of viruses. Viruses are a powerful natural nanomaterial for the efficient delivery of genetic information by sophisticated mechanisms...
2017: Nanotheranostics
https://www.readbyqxmd.com/read/29178470/lymphocyte-independent-pathways-underlie-the-pathogenesis-of-murine-cytomegalovirus-associated-secondary-hemophagocytic-lymphohistiocytosis
#6
Brisse Ellen, Imbrechts Maya, Mitera Tania, Vandenhaute Jessica, Berghmans Nele, Boon Louis, Wouters H Carine, Snoeck Robert, Andrei Graciela, Matthys Patrick
Hemophagocytic lymphohistiocytosis (HLH) constitutes a spectrum of immunological disorders characterized by uncontrolled immune activation and key symptoms such as fever, splenomegaly, pancytopenia, hemophagocytosis, hyperferritinemia and hepatitis. In genetic or primary HLH, hyperactivated CD8+ T cells are the main drivers of pathology. However, in acquired, secondary HLH, the role of lymphocytes remains vague. In the present study the involvement of lymphocytes in the pathogenesis of a cytomegalovirus-induced model of secondary HLH was explored...
November 27, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29161691/failure-to-thrive-in-the-context-of-carney-complex
#7
Amit Tirosh, Adi Auerbach, Belen Bonella, Phaedon D Zavras, Elena Belyavskaya, Charalampos Lyssikatos, Karen Meir, Ram Weiss, Hagit Daum, Maya B Lodish, David Gillis, Constantine A Stratakis
BACKGROUND/AIMS: Carney complex (CNC) is a rare syndrome associated with multiple tumors and several other unique manifestations. We describe the clinical, genetic, and laboratory findings in a cohort of patients with CNC and failure to thrive (FTT). METHODS: A retrospective case series of pediatric patients with CNC presenting with FTT. RESULTS: We describe a patient with infantile Cushing syndrome (CS) who presented with severe FTT and liver disease; the patient was subsequently diagnosed with CNC...
November 21, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29158418/a-novel-pkhd1-mutation-interacts-with-the-nonobese-1diabetic-genetic-background-to-cause-autoimmune-cholangitis
#8
Wenting Huang, Daniel B Rainbow, Yuehong Wu, David Adams, Pranavkumar Shivakumar, Leah Kottyan, Rebekah Karns, Bruce Aronow, Jorge Bezerra, M Eric Gershwin, Laurence B Peterson, Linda S Wicker, William M Ridgway
We previously reported that NOD.c3c4 mice develop spontaneous autoimmune biliary disease (ABD) with anti-mitochondrial Abs, histopathological lesions, and autoimmune T lymphocytes similar to human primary biliary cholangitis. In this article, we demonstrate that ABD in NOD.c3c4 and related NOD ABD strains is caused by a chromosome 1 region that includes a novel mutation in polycystic kidney and hepatic disease 1 (Pkhd1). We show that a long terminal repeat element inserted into intron 35 exposes an alternative polyadenylation site, resulting in a truncated Pkhd1 transcript...
November 20, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29156773/association-of-acyp2-and-mphosph6-genetic-polymorphisms-with-the-risk-of-hepatocellular-carcinoma-in-chronic-hepatitis-b-virus-carriers
#9
Yingai Zhang, Shunlan Wang, Xiaohong Wen, Shufang Zhang, Yijun Yang
Hepatocellular carcinoma (HCC) is the dominant histologic type of primary liver cancer, and hepatitis B virus (HBV) infection is one of the major causes of HCC in the chronic HBV. Our study was investigated the association between the polymorphisms of ACYP2 and MPHOSPH6 genes and the risk of HCC induced by HBV infection. A total of 490 subjects were divided into two groups: 248 HBV patients with HCC (Case group), and 242 HBV patients without HCC (Control group). Unconditional logistic regression analysis was used to evaluate the association...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29145578/the-changing-paradigm-of-management-of-liver-abscesses-in-chronic-granulomatous-disease
#10
David M Straughan, Kaitlin C McLoughlin, John E Mullinax, Beatriz E Marciano, Alexandra F Freeman, Victoria L Anderson, Gulbu Uzel, Sa D C Azoury, Rebecca Sorber, Humair S Quadri, Harry L Malech, Suk See DeRavin, Natasha Kamal, Christopher Koh, Christa S Zerbe, Douglas B Kuhns, John I Gallin, Theo Heller, Steven M Holland, Udo Rudloff
Background: Chronic granulomatous disease (CGD) is a rare genetic disorder causing recurrent infections. Over one quarter of patients develop hepatic abscesses and liver dysfunction. Recent reports suggest disease-modifying treatment with corticosteroids is effective for these abscesses. Comparison of corticosteroid therapy to traditional invasive treatments has not been performed. Methods: Records of 268 patients with CGD treated at the National Institutes of Health (NIH) from 1980 to 2014 were reviewed...
November 14, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29119358/hepatitis-b-c-and-d-virus-genotypes-detected-in-hbsag-or-anti-hcv-positive-people-from-the-republic-of-moldova
#11
Ala Gori, Stela Gheorgita, Constantin Spinu, Iurie Pinzaru, Ala Halacu, Octavian Sajen, Luminița Suveica, Aurélie Sausy, Claude P Muller, Judith M Hübschen
In the Republic of Moldova, little is known about hepatitis B, C and D virus (HBV, HCV, HDV) genotypes, although the genetic variant may influence the course and outcome of disease. For HBV genotyping, 301 hepatitis B surface antigen (HBsAg)-positive sera collected in 2010 and 2011 from drug users, prison inmates, commercial sex workers, and the general population in different geographical regions were investigated. The 31 HBsAg-positive sera collected in 2011 were also tested for HDV. Eighty-eight anti-HCV-positive sera collected between 2010 and 2011 from the general population and health care workers were used for HCV genotyping...
November 8, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29116219/a-comparative-study-on-the-characterization-of-hepatitis-b-virus-quasispecies-by-clone-based-sequencing-and-third-generation-sequencing
#12
Jing Li, Mingjie Wang, Demin Yu, Yue Han, Zhitao Yang, Lei Wang, Xinxin Zhang, Feng Liu
Hepatitis B virus (HBV) has a high mutation rate due to the extremely high replication rate and the proofreading deficiency during reverse transcription. The generated variants with genetic heterogeneity are described as viral quasispecies (QS). Clone-based sequencing (CBS) is thought to be the 'gold standard' for assessing QS complexity and diversity of HBV, but an important issue about CBS is cost-effectiveness and laborious. In this study, we investigated the utility of the third-generation sequencing (TGS) DNA sequencing to characterize genetic heterogeneity of HBV QS and assessed the possible contribution of TGS technology in HBV QS studies...
November 8, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29116050/real-world-evidence-for-nucleoside-nucleotide-analogues-in-a-5-year-multicentre-study-of-antiviral-naive-chronic-hepatitis-b-patients-in-china-52-week-results
#13
Jidong Jia, Hong Tang, Qin Ning, Jiaji Jiang, Xiaoguang Dou, Mingxiang Zhang, Shuqin Zhang, Jia Shang, Wei Lu, Yinong Ye, Xin Wang, Mingshu Li, Jie Liu, Qingyan Bo, Wenzhong Tan
BACKGROUND: In China, the clinical management of chronic hepatitis B (CHB) is complicated by the use of various nucleos(t)ide analogue (NUC) regimens in treatment-naïve patients, including NUCs with low genetic barriers to resistance, with/without add-on therapy and de novo NUC combinations. This longitudinal observational study therefore investigated the real-world clinical management and efficacy of NUC therapy in treatment-naïve CHB patients in China. METHODS: Treatment-naïve CHB patients initiated on NUC therapy were enrolled from 63 hospitals in tier-2 Chinese cities...
November 8, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/29111272/novel-hbv-recombinants-between-genotypes-b-and-c-in-3-terminal-reverse-transcriptase-rt-sequences-are-associated-with-enhanced-viral-dna-load-higher-rt-point-mutation-rates-and-place-of-birth-among-chinese-patients
#14
Baoming Liu, Jing-Xian Yang, Ling Yan, Hui Zhuang, Tong Li
As one of the major global public health concerns, hepatitis B virus (HBV) can be divided into at least eight genotypes, which may be related to disease severity and treatment response. We previously demonstrated that genotypes B and C HBV, with distinct geographical distribution in China, had divergent genotype-dependent amino acid polymorphisms and variations in reverse transcriptase (RT) gene region, a target of antiviral therapy using nucleos(t)ide analogues. Recently recombination between HBV genotypes B and C was reported to occur in the RT region...
October 27, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29110841/heterogeneous-resistance-mechanisms-in-an-egfr-exon-19-mutated-non-small-cell-lung-cancer-patient-treated-with-erlotinib-persistent-fgfr3-mutation-localized-transformation-to-egfr-mutated-sclc-and-acquired-t790m-egfr-mutation
#15
Eric Santoni-Rugiu, Morten Grauslund, Linea C Melchior, Junia C Costa, Jens B Sørensen, Edyta M Urbanska
Patients with epidermal growth factor receptor (EGFR) gene-mutated non-small cell lung cancer (NSCLC) obtain substantial clinical benefit from EGFR tyrosine-kinase inhibitors (TKIs), but will ultimately develop TKI-resistance resulting in median progression-free survival of 9-15 months during first-line TKI-therapy. However, type and timing of TKI-resistance cannot be predicted and several mechanisms may simultaneously/subsequently occur during TKI-treatment. In this respect, we present a 49 year-old Caucasian male ex-smoker with metastatic pulmonary adenocarcinoma (ADC) that concomitantly harbored an EGFR exon 19-mutation (p...
November 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29105104/b-lymphocytes-limit-senescence-driven-fibrosis-resolution-and-favor-hepatocarcinogenesis-in-mouse-liver-injury
#16
Francesca Faggioli, Eleonora Palagano, Luca Di Tommaso, Matteo Donadon, Veronica Marrella, Camilla Recordati, Stefano Mantero, Anna Villa, Paolo Vezzoni, Barbara Cassani
Hepatocellular carcinoma (HCC) is a frequent neoplasia and a leading cause of inflammation-related cancer mortality. Despite most HCC arise from persistent inflammatory conditions; pathways linking chronic inflammation to cancer development are still incompletely elucidated. We dissected the role of adaptive immunity in the Mdr2-/- mouse, a model of inflammation-associated cancer, in which ablation of adaptive immunity has been induced genetically (Rag2-/-Mdr2-/- and μMt-Mdr2-/- mice) or with in vivo treatments using lymphocyte-specific depleting antibodies (anti-CD20 or anti-CD4/CD8)...
November 3, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29083323/dimethylguanidino-valeric-acid-is-a-marker-of-liver-fat-and-predicts-diabetes
#17
John F O'Sullivan, Jordan E Morningstar, Qiong Yang, Baohui Zheng, Yan Gao, Sarah Jeanfavre, Justin Scott, Celine Fernandez, Hui Zheng, Sean O'Connor, Paul Cohen, Ramachandran S Vasan, Michelle T Long, James G Wilson, Olle Melander, Thomas J Wang, Caroline Fox, Randall T Peterson, Clary B Clish, Kathleen E Corey, Robert E Gerszten
Unbiased, "nontargeted" metabolite profiling techniques hold considerable promise for biomarker and pathway discovery, in spite of the lack of successful applications to human disease. By integrating nontargeted metabolomics, genetics, and detailed human phenotyping, we identified dimethylguanidino valeric acid (DMGV) as an independent biomarker of CT-defined nonalcoholic fatty liver disease (NAFLD) in the offspring cohort of the Framingham Heart Study (FHS) participants. We verified the relationship between DMGV and early hepatic pathology...
October 30, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29075265/kir3ds1-hla-b-bw4-80ile-genotype-is-correlated-with-the-ifn-%C3%AE-therapy-response-in-hepatitis-b-e-antigen-positive-chronic-hepatitis-b
#18
Wenting Li, Xiaokun Shen, Binqing Fu, Chuang Guo, Yanyan Liu, Ying Ye, Rui Sun, Jiabin Li, Zhigang Tian, Haiming Wei
To date, several on-treatment-level virological and serological indices that may predict the response to interferon alpha (IFN-α) have been reported. However, no effective predictors, such as drug-response genes, that can be detected before administration of anti-hepatitis B virus (HBV) therapy with IFN-α, have been found. In the diverse range of chronic viral infection, genes that affect human immunity play important roles in understanding host and viral co-evolution. Killer-cell immunoglobulin-like receptors (KIRs), which are highly polymorphic at the allele and haplotype levels, participate in the antiviral function of natural killer (NK) cells via fine-tuning inhibition and activation of NK-cell responses that occur when the NK cells interact with human leukocyte antigen (HLA) class I molecules on target cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29063933/signal-self-enhancement-by-coordinated-assembly-of-gold-nanoparticles-enables-accurate-one-step-immunoassays
#19
J-H Kwon, H-T Kim, J-H Lee, R Kim, M Heo, J Shin, H-Y Lee, Y J Cha, J Lee
Current immunoassays are in general performed through time-consuming multi-step procedures that depend on the use of premade signal-producing reporters and often cause assay inaccuracy. Here we report an advanced immunoassay technology that resolves the delayed, complex, and inaccurate assay problems of conventional immunoassays. We have developed an accurate, rapid, simple, and label-free one-step-immunoassay based on the self-enhancement of sensitive immunoassay signals in an assay solution. The nano-scale protein particles (hepatitis B virus capsid and human ferritin heavy chain particles) were genetically engineered to present many well-oriented antibody (or antigen) probes and multi-copies of poly-histidine peptides on their surface, resulting in the construction of 3-dimensional (3D) bioprobes that chemisorb gold ions via coordination bonding and sensitively detect both antigen and antibody analytes...
November 2, 2017: Nanoscale
https://www.readbyqxmd.com/read/29061159/genetic-polymorphisms-of-hla-dp-and-isolated-anti-hbc-are-important-subsets-of-occult-hepatitis-b-infection-in-indonesian-blood-donors-a-case-control-study
#20
Yan Mardian, Yoshihiko Yano, Widya Wasityastuti, Neneng Ratnasari, Yujiao Liang, Wahyu Aristyaning Putri, Teguh Triyono, Yoshitake Hayashi
BACKGROUND: Occult hepatitis B infection (OBI) is defined as the presence of hepatitis B virus (HBV) DNA in the serum and/or liver in HBsAg-negative individuals. OBI is associated with the risk of viral transmission, especially in developing countries, and with progressive liver disease and reactivation in immunosuppressive patients. The objective of this study was to evaluate the relation of OBI to HLA-DP single nucleotide polymorphisms (SNPs) encoding antigen-binding sites for the immune response to HBV infection...
October 23, 2017: Virology Journal
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