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https://www.readbyqxmd.com/read/28735322/viral-infection-of-the-heart-pathogenesis-and-diagnosis
#1
Mateusz Kuffner, Agnieszka Pawlak, Maciej Przybylski
Viral infections of the heart cause serious clinical problems, either as infectious myocarditis, which usually is a consequence of acute infection or as idiopathic dilated cardiomyopathy, resulting rather from a chronic infection. This minireview presents an up-to-date view on pathomechanisms of viral infection of the heart tissues, the role of immune system in controlling infectious process at its various stages and current possibilities of recognizing viral infection of the heart with use of both cardiological and virological methods...
January 2, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/28733665/human-intrahepatic-cd69%C3%A2-%C3%A2-cd8-t-cells-have-a-tissue-resident-memory-t-cell-phenotype-with-reduced-cytolytic-capacity
#2
Femke Stelma, Annikki de Niet, Marjan J Sinnige, Karel A van Dort, Klaas P J M van Gisbergen, Joanne Verheij, Ester M M van Leeuwen, Neeltje A Kootstra, Hendrik W Reesink
Tissue resident memory T cells (TRM) have been identified in various tissues, however human liver TRM to date remain unidentified. TRM can be recognized by CD69 and/or CD103 expression and may play a role in the pathology of chronic hepatitis B (CHB) and hepatitis C virus infection (CHC). Liver and paired blood mononuclear cells from 17 patients (including 4 CHB and 6 CHC patients) were isolated and CD8+ T cells were comprehensively analysed by flowcytometry, immunohistochemistry and qPCR. The majority of intrahepatic CD8+ T cells expressed CD69, a marker used to identify TRM, of which a subset co-expressed CD103...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733564/the-clinical-features-and-treatment-outcome-of-chronic-hepatitis-c-with-pegylated-interferon-and-ribavirin-in-routine-care
#3
S S Tan, Z Adlin Nadia
AIM: To describe the clinical characteristic of hepatitis C (HCV) patients and the results of pegylated interferon and ribavirin (PegIFN/RBV) therapy in a routine clinical practice. METHODS: A retrospective review of consecutive HCV patients treated with PegIFN/RBV in 2004 to 2012. RESULTS: A total of 273 patients received treatment. The mean age was 44.16 ± 10.5 years and 76% were male. The top 2 self-reported risks were blood or blood product transfusion before 1994 and injection drug use, found in 57...
June 2017: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28733129/endocannabinoids-exert-cb1-receptor-mediated-neuroprotective-effects-in-models-of-neuronal-damage-induced-by-hiv-1-tat-protein
#4
Changqing Xu, Douglas J Hermes, Blessing Nwanguma, Ian R Jacobs, Kenneth Mackie, Somnath Mukhopadhyay, Aron H Lichtman, Bogna Ignatowska-Jankowska, Sylvia Fitting
In the era of combined antiretroviral therapy (cART), human immunodeficiency virus type 1 (HIV-1) is considered a chronic disease that specifically targets the brain and causes HIV-1-associated neurocognitive disorders (HAND). Endocannabinoids (eCBs) elicit neuroprotective and anti-inflammatory actions in several central nervous system (CNS) disease models, but their effects in HAND remain unknown. HIV-1 does not infect neurons, but produces viral toxins, such as transactivator of transcription (Tat), that disrupt neuronal calcium equilibrium and give rise to synaptodendritic injuries and cell death, the former being highly correlated with HAND...
July 18, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28732035/vaccine-induced-immune-responses-against-both-gag-and-env-improve-control-of-simian-immunodeficiency-virus-replication-in-rectally-challenged-rhesus-macaques
#5
Mauricio A Martins, Young C Shin, Lucas Gonzalez-Nieto, Aline Domingues, Martin J Gutman, Helen S Maxwell, Iris Castro, Diogo M Magnani, Michael Ricciardi, Nuria Pedreño-Lopez, Varian Bailey, Dillon Betancourt, John D Altman, Matthias Pauthner, Dennis R Burton, Benjamin von Bredow, David T Evans, Maoli Yuan, Christopher L Parks, Keisuke Ejima, David B Allison, Eva Rakasz, Glen N Barber, Saverio Capuano, Jeffrey D Lifson, Ronald C Desrosiers, David I Watkins
The ability to control lentivirus replication may be determined, in part, by the extent to which individual viral proteins are targeted by the immune system. Consequently, defining the antigens that elicit the most protective immune responses may facilitate the design of effective HIV-1 vaccines. Here we vaccinated four groups of rhesus macaques with a heterologous vector prime/boost/boost/boost (PBBB) regimen expressing the following simian immunodeficiency virus (SIV) genes: env, gag, vif, rev, tat, and nef (Group 1); env, vif, rev, tat, and nef (Group 2); gag, vif, rev, tat, and nef (Group 3); or vif, rev, tat, and nef (Group 4)...
July 21, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28732019/rate-of-hepatitis-c-viral-clearance-by-human-livers-in-human-patients-liver-transplantation-modeling-primary-infection-and-implications-for-studying-entry-inhibition
#6
Michael G Hughes, William W Tucker, Sreelatha Reddy, Michael E Brier, David Koch, Craig J McClain, Colleen B Jonsson, Nobuyuki Matoba, Donghoon Chung
To better understand the dynamics of early hepatitis C virus (HCV) infection, we determined how rapidly non-cirrhotic HCV-uninfected liver allografts clear HCV from the circulation of cirrhotic HCV-infected patients at the time of transplantation but before administration of immunosuppression. Specifically, we characterized serum HCV kinetics during the first 90 min of reperfusion for 19 chronically HCV-infected patients transplanted with an HCV-uninfected liver by measuring serum viral load immediately prior to reperfusion (t = 0) and then every 15 min for a total of 90 min (t = 90)...
2017: PloS One
https://www.readbyqxmd.com/read/28729867/exposure-to-the-epstein-barr-viral-antigen-latent-membrane-protein-1-induces-myelin-reactive-antibodies-in-vivo
#7
Yakov Lomakin, Georgii Pavlovich Arapidi, Alexander Chernov, Rustam Ziganshin, Evgenii Tcyganov, Irina Lyadova, Ivan Olegovich Butenko, Maria Osetrova, Natalia Ponomarenko, Georgy Telegin, Vadim Markovich Govorun, Alexander Gabibov, Alexey Belogurov
Multiple sclerosis (MS) is an autoimmune chronic inflammatory disease of the central nervous system (CNS). Cross-reactivity of neuronal proteins with exogenous antigens is considered one of the possible mechanisms of MS triggering. Previously, we showed that monoclonal myelin basic protein (MBP)-specific antibodies from MS patients cross-react with Epstein-Barr virus (EBV) latent membrane protein 1 (LMP1). In this study, we report that exposure of mice to LMP1 results in induction of myelin-reactive autoantibodies in vivo...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28729862/rad51-interacts-with-non-structural-3-protein-of-hepatitis-c-virus-and-regulates-viral-production
#8
Kidong Son, Tram T T Nguyen, Jae-Woong Choi, Long V Pham, Trang T D Luong, Yun-Sook Lim, Soon B Hwang
Hepatitis C virus (HCV) is a leading cause of chronic liver disease affecting over 170 million people worldwide. Chronic infection with HCV progresses to liver fibrosis, cirrhosis, and hepatocellular carcinoma. HCV exploits host cellular factors for viral propagation. To investigate the cellular factors required for HCV propagation, we screened a siRNA library targeting human cell cycle genes using cell culture grown HCV-infected cells. In the present study, we selected and characterized a gene encoding Rad51...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28729054/isosorbide-based-peptidomimetics-as-inhibitors-of-hepatitis-c-virus-serine-protease
#9
Aline C Portela, Thalita G Barros, Camilo H da S Lima, Luiza R S Dias, Pedro H R de A Azevedo, Anna Sophia C L Dantas, Ronaldo Mohana-Borges, Gustavo T Ventura, Sergio Pinheiro, Estela M F Muri
Hepatitis C infection is a cause of chronic liver diseases such as cirrhosis and carcinoma. The current therapy for hepatitis C has limited efficacy and low tolerance. The HCV encodes a serine protease which is critical for viral replication, and few protease inhibitors are currently on the market. In this paper, we describe the synthesis and screening of novel isosorbide-based peptidomimetic inhibitors, in which the compounds 1d, 1e, and 1i showed significant inhibition of the protease activity in vitro at 100µM...
July 8, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28727946/confounding-by-single-nucleotide-polymorphism-rs117648444-p70s-affects-the-association-of-interferon-lambda-locus-variants-with-response-to-interferon-%C3%AE-ribavirin-therapy-in-patients-with-chronic-genotype-3-hepatitis-c-virus-infection
#10
Anand Bhushan, Sumona Ghosh, Samsiddhi Bhattacharjee, Sreedhar Chinnaswamy
Genome-wide association studies discovered interferon lambda (IFNL or IFN-λ) locus on chromosome 19 to be involved in clearance of chronic hepatitis C virus (HCV) infection in patients following interferon-α-ribavirin (IFN-RBV) therapy. Subsequent studies established a dinucleotide polymorphism rs368234815, as the prime causal variant behind this association. The ΔG allele of this variant gives rise to a new IFNL gene, IFNL4, coding for IFN-λ4 whose activity paradoxically associates with lesser viral clearance rates...
July 20, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/28727810/cucumber-mosaic-virus-coat-protein-modulates-the-accumulation-of-2b-protein-and-antiviral-silencing-that-causes-symptom-recovery-in-planta
#11
Xiao-Peng Zhang, De-Shui Liu, Teng Yan, Xiao-Dong Fang, Kai Dong, Jin Xu, Ying Wang, Jia-Lin Yu, Xian-Bing Wang
Shoot apical meristems (SAM) are resistant to most plant viruses due to RNA silencing, which is restrained by viral suppressors of RNA silencing (VSRs) to facilitate transient viral invasion of the SAM. In many cases chronic symptoms and long-term virus recovery occur, but the underlying mechanisms are poorly understood. Here, we found that wild-type Cucumber mosaic virus (CMVWT) invaded the SAM transiently, but was subsequently eliminated from the meristems. Unexpectedly, a CMV mutant, designated CMVRA that harbors an alanine substitution in the N-terminal arginine-rich region of the coat protein (CP) persistently invaded the SAM and resulted in visible reductions in apical dominance...
July 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28725030/a-practical-model-evaluating-antiviral-cytokines-by-natural-killer-cells-in-treatment-na%C3%A3-ve-patients-with-chronic-hepatitis-b-virus-infection
#12
Xiaoyan Li, Yurong Gu, Xiaobo Guo, Lin Gu, Liang Zhou, Xiaojuan Wu, Xueqin Wang, Zania Stamataki, Yuehua Huang
Natural killer (NK) cells play a major role in anti-viral immunity as first line defense during hepatitis B infection, particularly in untreated patients whose T cells functions are profoundly impaired. Cytokine interferon (IFN)-γ and tumor necrosis factor (TNF)-α produced by NK cells are important anti-viral factors. However, there is lack of a quantifiable model to evaluate cytokine responses by NK cells. In this study, almost half of the patients (47.9%) beyond treatment criteria had high cytokine activity, although it was lower than those recommended for antiviral therapy (78...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724761/isg15-modulates-type-i-interferon-signaling-and-antiviral-response-during-hepatitis-e-virus-replication
#13
Harini Sooryanarain, Adam J Rogers, Dianjun Cao, Mary Etna R Haac, Yogesh A Karpe, Xiang-Jin Meng
Hepatitis E virus (HEV), a single-stranded positive-sense RNA virus, generally causes a self-limiting acute viral hepatitis, although chronic HEV infection has recently become a significant clinical problem in immunocompromised individuals especially in solid organ transplant recipients. Innate immunity, via type-I interferon (IFN) response, plays an important role during initial stages of a viral infection. ISG15, an IFN-induced ubiquitin-like protein, is known to have an immunomodulatory role, as well as can impart a direct antiviral effect against a wide spectrum of virus families...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28723711/epidemiology-of-autoimmune-and-inflammatory-diseases-in-a-french-nationwide-hiv-cohort
#14
D Lebrun, M Hentzien, L Cuzin, D Rey, V Joly, L Cotte, C Allavena, P Dellamonica, A Servettaz, F Bani-Sadr
HIV infection and inflammatory and autoimmune diseases (IAD) are both related to immune dysfunction. Epidemiological data on IAD in patients living with HIV (PLHIV) are scarce. The aim of this study was thus to estimate the prevalence of 26 IAD among PLHIV followed in a large French multicenter cohort in the cART era (from January 2000 to July 2013), and to describe their occurrence according to cART onset, the immuno-virological status of patients and HCV and/or HBV co-infection.During the study period, 33 403 PLHIV were included in the Dat'AIDS cohort; 1381 patients with an IAD were identified...
July 18, 2017: AIDS
https://www.readbyqxmd.com/read/28723469/inflammation-microbiota-and-prostate-cancer
#15
REVIEW
Martin Puhr, Angelo De Marzo, William Isaacs, Marshall Scott Lucia, Karen Sfanos, Srinivasan Yegnasubramanian, Zoran Culig
CONTEXT: Chronic inflammation of the prostate has been associated with preneoplastic lesions and cancer development. Multiple causes have been considered for chronic inflammation of the prostate. Inflammatory cytokines such as interleukins are implicated in prostate carcinogenesis and development. OBJECTIVE: To evaluate literature published on etiological factors, urinary microbiota, morphological features of proliferative inflammatory atrophy and high-grade prostate intraepithelial neoplasia, genetic polymorphisms, inflammatory stress, and cytokine signaling...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28721309/retinal-pigment-epithelial-cells-are-a-potential-reservoir-for-ebola-virus-in-the-human-eye
#16
Justine R Smith, Shawn Todd, Liam M Ashander, Theodosia Charitou, Yuefang Ma, Steven Yeh, Ian Crozier, Michael Z Michael, Binoy Appukuttan, Keryn A Williams, David J Lynn, Glenn A Marsh
PURPOSE: Success of Ebola virus (EBOV) as a human pathogen relates at the molecular level primarily to blockade the host cell type I interferon (IFN) antiviral response. Most individuals who survive Ebola virus disease (EVD) develop a chronic disease syndrome: approximately one-quarter of survivors suffer from uveitis, which has been associated with presence of EBOV within the eye. Clinical observations of post-Ebola uveitis indicate involvement of retinal pigment epithelial cells. METHODS: We inoculated ARPE-19 human retinal pigment epithelial cells with EBOV, and followed course of infection by immunocytochemistry and measurement of titer in culture supernatant...
July 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28720784/snap-tagged-chikungunya-virus-replicons-improve-visualisation-of-non-structural-protein-3-by-fluorescence-microscopy
#17
Roland Remenyi, Grace C Roberts, Carsten Zothner, Andres Merits, Mark Harris
Chikungunya virus (CHIKV), a mosquito-borne alphavirus, causes febrile disease, muscle and joint pain, which can become chronic in some individuals. The non-structural protein 3 (nsP3) plays essential roles during infection, but a complete understanding of its function is lacking. Here we used a microscopy-based approach to image CHIKV nsP3 inside human cells. The SNAP system consists of a self-labelling enzyme tag, which catalyses the covalent linking of exogenously supplemented synthetic ligands. Genetic insertion of this tag resulted in viable replicons and specific labelling while preserving the effect of nsP3 on stress granule responses and co-localisation with GTPase Activating Protein (SH3 domain) Binding Proteins (G3BPs)...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719029/directly-observed-therapy-of-sofosbuvir-ribavirin-peginterferon-with-minimal-monitoring-for-the-treatment-of-chronic-hepatitis-c-in-people-with-a-history-of-drug-use-in-chennai-india-c-dot
#18
Sunil S Solomon, Mark S Sulkowski, Pradeep Amrose, Aylur K Srikrishnan, Allison M McFall, Balakrishnan Ramasamy, Muniratnam S Kumar, Santhanam Anand, David L Thomas, Shruti H Mehta
BACKGROUND AND AIMS: We assessed the feasibility of field-based directly observed therapy (DOT) with minimal monitoring to deliver HCV treatment to people with a history of drug use in Chennai, India. METHODS: 50 participants were randomized 1:1 to sofosbuvir + peginterferon alfa 2a + ribavirin (SOF+PR) for 12 weeks (Arm 1) vs. sofosbuvir + ribavirin (SOF+R) for 24 weeks (Arm 2). SOF+R was delivered daily at participant chosen venues and weekly peginterferon injections at the study clinic...
July 18, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28719012/the-impact-of-immunoglobulin-in-acute-hiv-infection-on-the-hiv-reservoir-a-randomized-controlled-trial
#19
J Tiraboschi, S Ray, K Patel, A Teague, M Pace, P Phalora, N Robinson, E Hopkins, J Meyerowitz, Y Wang, J Cason, S Kaye, J Sanderson, P Klenerman, S Fidler, J Frater, J Fox
OBJECTIVES: Antiretroviral therapy (ART) during acute HIV infection (AHI) restricts the HIV reservoir, but additional interventions are necessary to induce a cure. Intravenous immunoglobulin (IVIG) is not HIV-specific but is safe and temporarily reduces the HIV reservoir in chronic HIV infection. We present a randomized controlled trial to investigate whether IVIG plus ART in AHI reduces the HIV reservoir and immune activation compared with ART alone. METHODS: Ten men with AHI (Fiebig II-IV) initiated ART (tenofovir, entricitabine, ritonavir boosted darunavir and raltegravir) at HIV-1 diagnosis and were randomized to ART alone or ART plus 5 days of IVIG, once virally suppressed (week 19)...
July 18, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28718943/hepatitis-e-virus-orf-1-induces-proliferative-and-functional-t-cell-responses-in-patients-with-ongoing-and-resolved-hepatitis-e
#20
Jana Al-Ayoubi, Patrick Behrendt, Birgit Bremer, Pothakamuri Venkata Suneetha, Anett Gisa, Franziska Rinker, Michael P Manns, Markus Cornberg, Heiner Wedemeyer, Anke R M Kraft
BACKGROUND AND AIMS: Hepatitis E virus (HEV) is a major cause of acute viral hepatitis with > 3 million symptomatic cases per year accounting for 70,000 HEV-related deaths. HEV-specific T-cell responses have been investigated against structural proteins expressed by open reading frames (ORF) 2 and 3. T-cell responses against non-structural HEV proteins encoded by ORF1 are hardly studied. The aim of this study was to determine HEV ORF1-specific T-cell responses in comparison to ORF2/3 in patients exposed to HEV...
July 18, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
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