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https://www.readbyqxmd.com/read/28811492/interferon-alpha-treatment-rapidly-clears-hepatitis-e-virus-infection-in-humanized-mice
#1
Martijn D B van de Garde, Suzan D Pas, Gertine W van Oord, Lucio Gama, Youkyung Choi, Robert A de Man, Andre Boonstra, Thomas Vanwolleghem
Antiviral treatment options for chronic Hepatitis E Virus (HEV) infections are limited and immunological determinants of viral persistence remain largely unexplored. We studied the antiviral potency of pegylated interferon-α (pegIFNα) against HEV infections in humanized mice and modelled intrahepatic interferon stimulated gene (ISG) responses. Human gene expression levels in humanized mouse livers were analyzed by qPCR and Nanostring. Human CXCL10 was measured in mouse serum. HEV genotype 3 (gt3) infections were cleared from liver and feces within 8 pegIFNα doses in all mice and relapsed after a single pegIFNα injection in only half of treated animals...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797124/preclinical-development-of-a-vaccine-against-oligomeric-alpha-synuclein-based-on-virus-like-particles
#2
Marika Doucet, Aadil El-Turabi, Franziska Zabel, Benjamin H M Hunn, Nora Bengoa-Vergniory, Milena Cioroch, Mauricio Ramm, Amy M Smith, Ariane Cruz Gomes, Gustavo Cabral de Miranda, Richard Wade-Martins, Martin F Bachmann
Parkinson's disease (PD) is a progressive and currently incurable neurological disorder characterised by the loss of midbrain dopaminergic neurons and the accumulation of aggregated alpha-synuclein (a-syn). Oligomeric a-syn is proposed to play a central role in spreading protein aggregation in the brain with associated cellular toxicity contributing to a progressive neurological decline. For this reason, a-syn oligomers have attracted interest as therapeutic targets for neurodegenerative conditions such as PD and other alpha-synucleinopathies...
2017: PloS One
https://www.readbyqxmd.com/read/28795996/initial-alpha-fetoprotein-response-predicts-prognosis-in-hepatitis-b-related-solitary-hcc-patients-after-radiofrequency-ablation
#3
Su Jong Yu, Jee Hye Kwon, Won Kim, Jung-Hwan Yoon, Jeong Min Lee, Jae Young Lee, Eun Ju Cho, Jeong-Hoon Lee, Hwi Young Kim, Yong Jin Jung, Yoon Jun Kim
BACKGROUND: Radiofrequency ablation (RFA) is effective for early-stage hepatocellular carcinoma but recurrence is problem. GOALS: To identify prognostic factors including alpha-fetoprotein (AFP) for overall survival and intrahepatic recurrence after RFA. PATIENTS AND METHODS: Not only naïve but also previously treated patients with solitary hepatitis B virus-related hepatocellular carcinoma <5 cm were prospectively enrolled and a ≥50% decrease from baseline to 1 month after RFA was defined as an initial AFP response...
August 8, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/28795238/efficacy-and-safety-of-sofosbuvir-based-interferon-free-therapy-the-management-of-rheumatologic-extrahepatic-manifestations-associated-with-chronic-hepatitis-c%C3%A2-virus-infection
#4
A A Shahin, H S Zayed, M Said, S A Amer
BACKGROUND: The use of pegylated interferon alpha (IFN) has been of concern in chronic hepatitis C virus (HCV) patients with rheumatologic extrahepatic manifestations (EHM) due to the immunostimulatory effects of IFN. AIM: To study the efficacy and safety of sofosbuvir-based, IFN-free antiviral therapy in chronic HCV patients with rheumatologic EHM. MATERIAL AND METHODS: Group A included 24 patients with arthropathy (arthralgia or arthritis, n = 15) or vasculitis (n = 9) who received sofosbuvir and ribavirin (n = 17) or sofosbuvir and simeprevir (n = 7)...
August 9, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28794045/pseudorabies-virus-dutpase-ul50-induces-lysosomal-degradation-of-type-i-interferon-receptor-1-and-antagonizes-the-alpha-interferon-response
#5
Rui Zhang, Aotian Xu, Chao Qin, Qiong Zhang, Shifan Chen, Yue Lang, Mengdong Wang, Chuang Li, Wenhai Feng, Rui Zhang, Zhengfan Jiang, Jun Tang
Alphaherpesviruses that establish persistent infection partly rely on their ability to evade host anti-viral responses, notably, the type I interferon (IFN) response. However, the mechanisms employed by alphaherpesviruses to avoid this response are not well understood. Pseudorabies virus (PRV) is an economically important pathogen and a useful model system to study alphaherpesvirus biology. To identify PRV proteins that antagonize type I IFN signaling, we performed a screen using an IFN-stimulated response element reporter in the swine cell line CRL...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28792537/isolation-and-functional-characterization-of-hepatitis-b-virus-specific-t-cell-receptors-as-new-tools-for-experimental-and-clinical-use
#6
Karin Wisskirchen, Kai Metzger, Sophia Schreiber, Theresa Asen, Luise Weigand, Christina Dargel, Klaus Witter, Elisa Kieback, Martin F Sprinzl, Wolfgang Uckert, Matthias Schiemann, Dirk H Busch, Angela M Krackhardt, Ulrike Protzer
T-cell therapy of chronic hepatitis B is a novel approach to restore antiviral T-cell immunity and cure the infection. We aimed at identifying T-cell receptors (TCR) with high functional avidity that have the potential to be used for adoptive T-cell therapy. To this end, we cloned HLA-A*02-restricted, hepatitis B virus (HBV)-specific T cells from patients with acute or resolved HBV infection. We isolated 11 envelope- or core-specific TCRs and evaluated them in comprehensive functional analyses. T cells were genetically modified by retroviral transduction to express HBV-specific TCRs...
2017: PloS One
https://www.readbyqxmd.com/read/28792511/aldehyde-dehydrogenase-1-aldh1-isoform-expression-and-potential-clinical-implications-in-hepatocellular-carcinoma
#7
Cheng-Kun Yang, Xiang-Kun Wang, Xi-Wen Liao, Chuang-Ye Han, Ting-Dong Yu, Wei Qin, Guang-Zhi Zhu, Hao Su, Long Yu, Xiao-Guang Liu, Si-Cong Lu, Zhi-Wei Chen, Zhen Liu, Ke-Tuan Huang, Zheng-Tao Liu, Yu Liang, Jian-Lu Huang, Kai-Yin Xiao, Min-Hao Peng, Cheryl Ann Winkle, Stephen J O'Brien, Tao Peng
Hepatocellular carcinoma (HCC) is one of the most prevalent and life-threatening malignancies worldwide. There are few diagnostic and prognostic biomarkers and druggable targets for HCC. Aldehyde dehydrogenase 1 (ALDH1) is a marker of stem cells in a variety of cancers, but the mRNA levels and prognostic value of ALDH1 isoforms in HCC patients remain unknown. In the present study, gene ontology annotation of the ALDH1 family was performed using the Database for Annotation, Visualization and Integrated Discovery (DAVID), and the gene pathway analsis was performed using GeneMANIA software...
2017: PloS One
https://www.readbyqxmd.com/read/28791126/investigation-of-sphingosine-kinase-1-in-interferon-responses-during-dengue-virus-infection
#8
Amanda L Aloia, Julie K Calvert, Jennifer N Clarke, Lorena T Davies, Karla J Helbig, Stuart M Pitson, Jillian M Carr
Dengue virus (DENV) regulates sphingosine kinase (SK)-1 activity and chemical inhibition of SK1 reduces DENV infection. In primary murine embryonic fibroblasts (pMEFs) lacking SK1 however, DENV infection is enhanced and this is associated with induction of normal levels of interferon beta (IFN-β) but reduced levels of IFN-stimulated genes (ISGs). We have further investigated this link between SK1 and type I IFN responses. DENV infection downregulates cell-surface IFN-alpha receptor (IFNAR)1 in both wild-type (WT) and SK1(-)(/-) pMEF, but, consistent with poor ISG responses, shows reduced induction of phosphorylated (p)-STAT1 and key IFN regulatory factors (IRF)1 and -7 in SK1(-/-) pMEF...
July 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28780115/foreign-gene-expression-and-induction-of-antibody-response-by-recombinant-fowl-adenovirus-9-based-vectors-with-exogenous-promoters
#9
James G Ackford, Juan C Corredor, Yanlong Pei, Peter J Krell, Grégoy Bédécarrats, E Va Nagy
Fowl adenoviruses (FAdVs) are promising vectors for poultry vaccines and gene therapy. The commonly used human cytomegalovirus (CMV) promoter in recombinant FAdV-9 viruses (recFAdV-9s) leads to foreign gene expression that elicits an antibody response. Despite its strength, studies have shown that the CMV promoter is prone to silencing by methylation hampering the in vivo application of vectors containing this promoter. Therefore, to improve our virus vector system and circumvent potential limitations of silencing, we engineered recFAdV-9s with foreign gene expression cassettes carrying the CMV enhancer/chicken β-actin (CAG) or the human elongation factor 1 alpha (EF1α) promoters with or without the posttranscriptional regulatory element of woodchuck hepatitis virus (WPRE)...
August 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28774415/new-treatments-to-reach-functional-cure-virological-approaches
#10
REVIEW
David Durantel
Current therapies of chronic hepatitis B (CHB) remain limited to pegylated-interferon-alpha (pegIFN-α) or any of the five approved nucleos(t)ide analogues (NA). If viral suppression can be achieved in the majority of patients with the high-barrier-to-resistance new-generation of NA, i.e. entecavir and tenofovir, HBsAg loss is achieved by PEG-IFN-α and/or NA in only 10% of patients, after a 5-year follow-up. Attempts to improve the response by administering two different NA or a combination of NA and PEG-IFN-α have not provided a dramatic increase in the rate of "functional cure"...
June 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28774414/hepatitis-delta-infection-current-and-new-treatment-options
#11
REVIEW
Menashe Elazar, Christopher Koh, Jeffrey S Glenn
In humans, hepatitis D virus (HDV) infection only occurs in the presence of a concomitant hepatitis B virus (HBV) infection, and induces the most severe form of human viral hepatitis. Even though HDV is spread worldwide and is endemic in some regions, screening and treatment has been often neglected in part due to the lack of an effective therapy. Moreover, HDV prevalence rates are increasing in many countries driven by immigration from areas of high endemicity. Currently, no FDA-approved anti-HDV therapy is available, although interferon (IFN) alpha therapy has demonstrated benefit in a minority of patients...
June 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28771191/somatic-host-cell-alterations-in-hpv-carcinogenesis
#12
REVIEW
Tamara R Litwin, Megan A Clarke, Michael Dean, Nicolas Wentzensen
High-risk human papilloma virus (HPV) infections cause cancers in different organ sites, most commonly cervical and head and neck cancers. While carcinogenesis is initiated by two viral oncoproteins, E6 and E7, increasing evidence shows the importance of specific somatic events in host cells for malignant transformation. HPV-driven cancers share characteristic somatic changes, including apolipoprotein B mRNA editing catalytic polypeptide-like (APOBEC)-driven mutations and genomic instability leading to copy number variations and large chromosomal rearrangements...
August 3, 2017: Viruses
https://www.readbyqxmd.com/read/28770872/association-of-interferon-alpha-receptor-1-with-sustained-virological-response-in-hepatitis-c-and-b-co-infected-patients
#13
Maleha Asim, Amir Rashid, Asifa Majeed, Maryam Wahid, Suhail Razak, Aneela Jamil
OBJECTIVE: To determine the association of interferon alpha receptor-1 with success rate of interferon therapy in patients co-infected with hepatitis C virus and hepatitis B virus. METHODS: The study was conducted at the Army Medical College, Rawalpindi, Pakistan, from December 2013 to November 2014, and comprised patients with hepatitis C and hepatitis B co-infection. The patients were treated with pegylated-interferon-2b plus ribavirin therapy for six months. With respect to interferon therapy, patients with undetectable hepatitis C virus-ribonucleic acid along with normal alanine aminotransferase were considered responders and patients with detectable hepatitis C virus-ribonucleic acid at week 48 were considered as non-responders...
July 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28770246/distinct-clinico-immunological-profile-of-patients-infected-with-human-papilloma-virus-genotypes-6-and-11
#14
Manjula Singh, Deepshi Thakral, Hemanta Kumar Kar, Narayan Rishi, Prafulla Kumar Sharma, Dipendra Kumar Mitra
Anogenital warts are primarily caused by Human Papillomavirus (HPV) type 6 and 11, which belong to the taxonomic family Papillomaviridae, genus alpha-papillomavirus and species 10. The presentation of the warts is varied and most of the patients have high recurrence rate of wart lesions. Studies had shown that an effective cellular immune response is required for the control of HPV infection. Here, we report distinct clinico-immunological profile of two patients presenting with venereal warts caused by HPV genotypes 6 and 11...
June 2017: Virusdisease
https://www.readbyqxmd.com/read/28770240/survey-symptomatology-transmission-host-range-and-characterization-of-begomovirus-associated-with-yellow-mosaic-disease-of-ridge-gourd-in-southern-india
#15
Chandrakant V Patil, S V Ramdas, U Premchand, K S Shankarappa
Ridge gourd is an important vegetable crop and is affected by several biotic and abiotic factors. Among the different biotic factors, ridge gourd yellow mosaic disease (RgYMD) is new emerging threat for the production of ridge gourd. The incidence of the RgYMD varied from 30 to 100% in southern India with highest disease incidence of 100% observed in Belagavi district of Karnataka state. The infected plants showed chlorosis, mosaic, cupping of leaves, blistering, reduction in leaf size and stunted growth. The varieties/hybrids grown in the farmer's fields were found to be susceptible to the disease...
June 2017: Virusdisease
https://www.readbyqxmd.com/read/28770071/dampening-of-population-cycles-in-voles-affects-small-mammal-community-structure-decreases-diversity-and-increases-prevalence-of-a-zoonotic-disease
#16
Frauke Ecke, David G Angeler, Magnus Magnusson, Hussein Khalil, Birger Hörnfeldt
Long-term decline and depression of density in cyclic small rodents is a recent widespread phenomenon. These observed changes at the population level might have cascading effects at the ecosystem level. Here, we assessed relationships between changing boreal landscapes and biodiversity changes of small mammal communities. We also inferred potential effects of observed community changes for increased transmission risk of Puumala virus (PUUV) spread, causing the zoonotic disease nephropatica epidemica in humans...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28769541/the-psychometric-properties-of-the-quick-inventory-of-depressive-symptomatology-self-report-qids-sr-in-patients-with-hbv-related-liver-disease
#17
Mei Liu, Yuanyuan Wang, Jing Zhao, Sujun Zheng, Gabor S Ungvari, Chee H Ng, Zhong-Ping Duan, Yutao Xiang
BACKGROUND: Comorbid depression in Hepatitis B virus (HBV) is common. Developing accurate and time- efficient tools to measure depressive symptoms in HBV is important for research and clinical practice in China. AIMS: This study tested the psychometric properties of the Chinese version of the 16-item Quick Inventory of Depressive Symptomatology (QIDS-SR) in HBV patients. METHODS: The study recruited 245 depressed patients with HBV and related liver disease...
February 25, 2017: Shanghai Archives of Psychiatry
https://www.readbyqxmd.com/read/28765216/key-role-of-the-scavenger-receptor-marco-in-mediating-adenovirus-infection-and-subsequent-innate-responses-of-macrophages
#18
Mareike D Maler, Peter J Nielsen, Nicole Stichling, Idan Cohen, Zsolt Ruzsics, Connor Wood, Peggy Engelhard, Maarit Suomalainen, Ildiko Gyory, Michael Huber, Joachim Müller-Quernheim, Wolfgang W A Schamel, Siamon Gordon, Thilo Jakob, Stefan F Martin, Willi Jahnen-Dechent, Urs F Greber, Marina A Freudenberg, György Fejer
The scavenger receptor MARCO is expressed in several subsets of naive tissue-resident macrophages and has been shown to participate in the recognition of various bacterial pathogens. However, the role of MARCO in antiviral defense is largely unexplored. Here, we investigated whether MARCO might be involved in the innate sensing of infection with adenovirus and recombinant adenoviral vectors by macrophages, which elicit vigorous immune responses in vivo Using cells derived from mice, we show that adenovirus infection is significantly more efficient in MARCO-positive alveolar macrophages (AMs) and in AM-like primary macrophage lines (Max Planck Institute cells) than in MARCO-negative bone marrow-derived macrophages...
August 1, 2017: MBio
https://www.readbyqxmd.com/read/28763839/-expression-of-atad2-in-different-liver-lesions-and-its-clinical-significance
#19
F Liu, X Zhou, H H Ji, H Li, F G Xiang
Objective: To examine the expression of ATAD2 in different liver lesions and its clinical significance. Methods: ATAD2 expression in 60 hepatocellular carcinoma (HCC) surgical specimens (49 of which have concurrent liver cirrhosis), 43 HCC biopsy specimens, 2 high-grade liver dysplastic nodule specimens, 3 low-grade liver dysplastic nodule specimens, 50 liver cirrhosis tissue samples, and 20 normal liver tissue samples were measured using immunohistochemistry. The F-test, q-test, t-test, and chi-square test were used for statistical analysis of data...
May 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28757026/marek-s-disease-virus-type-1-encoded-analog-of-mir-155-promotes-proliferation-of-chicken-embryo-fibroblast-and-df-1-cells-by-targeting-hnrnpab
#20
Lu Dang, Man Teng, Hui-Zhen Li, Sheng-Ming Ma, Qing-Xia Lu, Hui-Fang Hao, Dong Zhao, En-Min Zhou, Gai-Ping Zhang, Jun Luo
Marek's disease virus type 1 (MDV-1) is a representative oncogenic Alpha herpesvirus that causes an immunosuppressive and neoplastic lymphoproliferative avian disease, namely Marek's disease (MD). The rapid-onset T-cell lymphoma in chickens induced by MDV-1 has been historically regarded as an ideal natural model for herpesvirus-related cancer research. As a viral analog of cellular miR-155, the MDV-1-encoded miR-M4-5p has been shown to be crucial for the virally-induced MD tumorigenesis. Our previous studies demonstrated that miR-M4-5p induces an over-expression of oncogene c-Myc by targeting LTBP1 and suppressing the TGF-β signaling pathway during MDV-1 infection...
August 2017: Veterinary Microbiology
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