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https://www.readbyqxmd.com/read/29333065/hepatitis-c-infection-in-patients-with-hereditary-bleeding-disorders-epidemiology-natural-history-and-management
#1
REVIEW
Nikolaos Papadopoulos, Vasiliki Argiana, Melanie Deutsch
Hereditary bleeding disorders include a group of diseases with abnormalities of coagulation. Prior to 1990, infection with hepatitis C virus (HCV) was mainly transmitted via pooled plasma products as a treatment for hereditary bleeding disorders. Anti-HCV positivity in these patients may be as high as >70% in some areas, while some of them have also been coinfected with human immunodeficiency virus. Since about 20% of HCV-infected patients clear the infection naturally, chronic HCV infection represents a significant health problem in this group of patients...
January 2018: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/29324751/stage-specific-ifn-induced-and-ifn-gene-expression-reveal-convergence-of-type-i-and-type-ii-ifn-and-highlight-their-role-in-both-acute-and-chronic-stage-of-pathogenic-siv-infection
#2
Nadia Echebli, Nicolas Tchitchek, Stéphanie Dupuy, Timothée Bruel, Caroline Peireira Bittencourt Passaes, Nathalie Bosquet, Roger Le Grand, Christine Bourgeois, Benoit Favier, Rémi Cheynier, Olivier Lambotte, Bruno Vaslin
Interferons (IFNs) play a major role in controlling viral infections including HIV/SIV infections. Persistent up-regulation of interferon stimulated genes (ISGs) is associated with chronic immune activation and progression in SIV/HIV infections, but the respective contribution of different IFNs is unclear. We analyzed the expression of IFN genes and ISGs in tissues of SIV infected macaques to understand the respective roles of type I and type II IFNs. Both IFN types were induced in lymph nodes during early stage of primary infection and to some extent in rectal biopsies but not in PBMCs...
2018: PloS One
https://www.readbyqxmd.com/read/29324226/human-specific-adaptations-in-vpu-conferring-anti-tetherin-activity-are-critical-for-efficient-early-hiv-1-replication-in%C3%A2-vivo
#3
Eri Yamada, Shinji Nakaoka, Lukas Klein, Elisabeth Reith, Simon Langer, Kristina Hopfensperger, Shingo Iwami, Gideon Schreiber, Frank Kirchhoff, Yoshio Koyanagi, Daniel Sauter, Kei Sato
The HIV-1-encoded accessory protein Vpu exerts several immunomodulatory functions, including counteraction of the host restriction factor tetherin, downmodulation of CD4, and inhibition of NF-κB activity to facilitate HIV-1 infection. However, the relative contribution of individual Vpu functions to HIV-1 infection in vivo remained unclear. Here, we used a humanized mouse model and HIV-1 strains with selective mutations in vpu to demonstrate that the anti-tetherin activity of Vpu is a prerequisite for efficient viral spread during the early phase of infection...
January 10, 2018: Cell Host & Microbe
https://www.readbyqxmd.com/read/29304123/infection-and-depletion-of-cd4-group-1-innate-lymphoid-cells-by-hiv-1-via-type-i-interferon-pathway
#4
Juanjuan Zhao, Liang Cheng, Hongbo Wang, Haisheng Yu, Bo Tu, Qiang Fu, Guangming Li, Qi Wang, Yanling Sun, Xin Zhang, Zhenwen Liu, Weiwei Chen, Liguo Zhang, Lishan Su, Zheng Zhang
Innate lymphoid cells (ILCs) are severely depleted during chronic HIV-1 infection by unclear mechanisms. We report here that human ILC1s comprising of CD4+ and CD4- subpopulations were present in various human lymphoid organs but with different transcription programs and functions. Importantly, CD4+ ILC1s expressed HIV-1 co-receptors and were productively infected by HIV-1 in vitro and in vivo. Furthermore, chronic HIV-1 infection activated and depleted both CD4+ and CD4- ILC1s, and impaired their cytokine production activity...
January 5, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29303997/high-mannose-but-not-complex-type-glycosylation-of-tetherin-is-required-for-restriction-of-hiv-1-release
#5
Abdul A Waheed, Ariana Gitzen, Maya Swiderski, Eric O Freed
Tetherin is an interferon-inducible antiviral protein that inhibits the release of a broad spectrum of enveloped viruses by retaining virions at the surface of infected cells. While the role of specific tetherin domains in antiviral activity is clearly established, the role of glycosylation in tetherin function is not clear. In this study, we carried out a detailed investigation of this question by using tetherin variants in which one or both sites of N-linked glycosylation were mutated (N65A, N92A, and N65,92A), and chemical inhibitors that prevent glycosylation at specific stages of oligosaccharide were added or modified...
January 5, 2018: Viruses
https://www.readbyqxmd.com/read/29301196/sustained-ifn-i-expression-during-established-persistent-viral-infection-a-bad-seed-for-protective-immunity
#6
REVIEW
Xavier Dagenais-Lussier, Hamza Loucif, Armstrong Murira, Xavier Laulhé, Simona Stäger, Alain Lamarre, Julien van Grevenynghe
Type I interferons (IFN-I) are one of the primary immune defenses against viruses. Similar to all other molecular mechanisms that are central to eliciting protective immune responses, IFN-I expression is subject to homeostatic controls that regulate cytokine levels upon clearing the infection. However, in the case of established persistent viral infection, sustained elevation of IFN-I expression bears deleterious effects to the host and is today considered as the major driver of inflammation and immunosuppression...
December 30, 2017: Viruses
https://www.readbyqxmd.com/read/29299684/treatment-of-hepatitis-c-in-special-populations
#7
REVIEW
Goki Suda, Koji Ogawa, Kenichi Morikawa, Naoya Sakamoto
Hepatitis C virus (HCV) infection is one of the primary causes of liver cirrhosis and hepatocellular carcinoma. In hemodialysis patients, the rate of HCV infection is high and is moreover associated with a poor prognosis. In liver transplantation patients with HCV infection, recurrent HCV infection is universal, and re-infected HCV causes rapid progression of liver fibrosis and graft loss. Additionally, in patients with HCV and human immunodeficiency virus (HIV) co-infection, liver fibrosis progresses rapidly...
January 3, 2018: Journal of Gastroenterology
https://www.readbyqxmd.com/read/29296883/innate-transcriptional-effects-by-adjuvants-on-the-magnitude-quality-and-durability-of-hiv-envelope-responses-in-nhps
#8
Joseph R Francica, Daniel E Zak, Caitlyn Linde, Emilio Siena, Carrie Johnson, Michal Juraska, Nicole L Yates, Bronwyn Gunn, Ennio De Gregorio, Barbara J Flynn, Nicholas M Valiante, Padma Malyala, Susan W Barnett, Pampi Sarkar, Manmohan Singh, Siddhartha Jain, Margaret Ackerman, Munir Alam, Guido Ferrari, Georgia D Tomaras, Derek T O'Hagan, Alan Aderem, Galit Alter, Robert A Seder
Adjuvants have a critical role for improving vaccine efficacy against many pathogens, including HIV. Here, using transcriptional RNA profiling and systems serology, we assessed how distinct innate pathways altered HIV-specific antibody responses in nonhuman primates (NHPs) using 8 clinically based adjuvants. NHPs were immunized with a glycoprotein 140 HIV envelope protein (Env) and insoluble aluminum salts (alum), MF59, or adjuvant nanoemulsion (ANE) coformulated with or without Toll-like receptor 4 (TLR4) and 7 agonists...
November 28, 2017: Blood Advances
https://www.readbyqxmd.com/read/29280955/immune-modulation-of-nyvac-based-hiv-vaccines-by-combined-deletion-of-viral-genes-that-act-on-several-signalling-pathways
#9
Carmen Elena Gómez, Beatriz Perdiguero, Cristina Sánchez-Corzo, Carlos Oscar S Sorzano, Mariano Esteban
An HIV-1 vaccine continues to be a major target to halt the AIDS pandemic. The limited efficacy of the RV144 phase III clinical trial with the canarypox virus-based vector ALVAC and a gp120 protein component led to the conclusion that improved immune responses to HIV antigens are needed for a more effective vaccine. In non-human primates, the New York vaccinia virus (NYVAC) poxvirus vector has a broader immunogenicity profile than ALVAC and has been tested in clinical trials. We therefore analysed the HIV immune advantage of NYVAC after removing viral genes that act on several signalling pathways (Toll-like receptors-TLR-interferon, cytokines/chemokines), as well as genes of unknown immune function...
December 27, 2017: Viruses
https://www.readbyqxmd.com/read/29279268/direct-acting-antiviral-therapy-enhances-total-cd4-and-cd8-t-cells-responses-but-does-not-alter-t-cells-activation-among-hcv-mono-infected-and-hcv-hiv-1-co-infected-patients
#10
Saeid Najafi Fard, Ivan Schietroma, Giuseppe Corano Scheri, Noemi Giustini, Sara Serafino, Eugenio Nelson Cavallari, Claudia Pinacchio, Gabriella De Girolamo, Giancarlo Ceccarelli, Carolina Scagnolari, Vincenzo Vullo, Gabriella d'Ettorre
AIM: Chronic immune activation and poor T-cell immune response are strongly associated with disease progression and pathogenesis of both hepatitis C virus (HCV) and human immunodeficiency virus (HIV)-1 infections. Little is known about the impact of anti-HCV Interferon (IFN)-free direct-acting antiviral (DAA) therapy on the systemic T-cells activation and patterns of peripheral T-cells producing pro-inflammatory cytokines. PATIENTS AND METHODS: Forty-five subjects including 18 HCV mono-infected, 17 HCV/HIV-1 co-infected patients under antiretroviral therapy (ART), and 10 healthy controls (HCs) were recruited...
December 23, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/29259976/phylogenetic-diversity-in-core-region-of-hepatitis-c-virus-genotype-1a-as-a-factor-associated-with-fibrosis-severity-in-hiv-1-coinfected-patients
#11
Micaela Parra, Natalia Laufer, Julieta M Manrique, Leandro R Jones, Jorge Quarleri
High hepatitis C virus (HCV) genetic diversity impacts infectivity/pathogenicity, influencing chronic liver disease progression associated with fibrosis degrees and hepatocellular carcinoma. HCV core protein is crucial in cell-growth regulation and host-gene expression. Liver fibrosis is accelerated by unknown mechanisms in human immunodeficiency virus-1- (HIV-1-) coinfected individuals. We aimed to study whether well-defined HCV-1a core polymorphisms and genetic heterogeneity are related to fibrosis in a highly homogeneous group of interferon-treated HIV-HCV-coinfected patients...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29258557/moloney-leukemia-virus-10-mov10-inhibits-the-degradation-of-apobec3g-through-interference-with-the-vif-mediated-ubiquitin-proteasome-pathway
#12
Cancan Chen, Xiaocao Ma, Qifei Hu, Xinghua Li, Feng Huang, Junsong Zhang, Ting Pan, Jinyu Xia, Chao Liu, Hui Zhang
BACKGROUND: MOV10 protein has ATP-dependent 5'-3' RNA helicase activity and belongs to the UPF1p superfamily. It can inhibit human immunodeficiency virus type 1 (HIV-1) replication at multiple stages and interact with apolipoprotein-B-mRNA-editing enzyme catalytic polypeptide-like 3G (APOBEC3G or A3G), a member of the cytidine deaminase family that exerts potent inhibitory effects against HIV-1 infection. However, HIV-1-encoded virion infectivity factor (Vif) protein specifically mediates the degradation of A3G via the ubiquitin-proteasome system (UPS)...
December 19, 2017: Retrovirology
https://www.readbyqxmd.com/read/29247579/peg-interferon-and-ribavirin-treatment-in-hiv-hcv-co-infected-patients-in-thailand-efficacy-safety-and-pharmacokinetics
#13
E J Smolders, N Thammajaruk, C T M M de Kanter, A Colbers, P Chaiyahong, T Cuprasitrut, S Chittmittraprap, T Apornpong, S Khemnark, P Tangkijvanich, D M Burger, A Avihingsanon
OBJECTIVE: In Thailand, 7.2% of HIV patients are co-infected with hepatitis C virus (HCV) and these patients are treated with peg-interferon + ribavirin (PR) for their HCV-infection. This study evaluates efficacy and safety of PR treatment and pharmacokinetics of ribavirin in this population. METHODS: HIV/HCV co-infected Thai patients were treated with PR for 24 or 48 weeks. R plasma concentrations were measured during treatment. Sustained virological response 24 weeks after end of treatment (SVR24) was used to describe efficacy...
December 16, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29242069/large-vessel-vasculitis-in-human-immunodeficiency-virus-infected-patients
#14
Yasmina Ferfar, Léa Savey, Cloé Comarmond, Nirvana Sadaghianloo, Marlène Garrido, Fanny Domont, Marc Antoine Valantin, Valérie Pourcher-Martinez, Philippe Cluzel, Pierre Fouret, Laurent Chiche, Julien Gaudric, Fabien Koskas, Patrice Cacoub, David Saadoun
OBJECTIVE: The objective of this study was to describe large-vessel vasculitis (LVV) in patients with human immunodeficiency virus (HIV) infection. It is a retrospective single-center study conducted between 2000 and 2015 through a university hospital of 11 HIV-infected patients with LVV. METHODS: The characteristics and outcome of 11 HIV-infected patients with LVV (7 patients fulfilled international criteria for Takayasu arteritis, 5 patients had histologic findings of vasculitis, and 5 patients had imaging features of aortitis) were analyzed and compared with those of 82 patients with LVV but without HIV infection...
December 11, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29233687/interferon-free-direct-acting-antiviral-therapy-for-acute-hepatitis-c-virus-infection-in-hiv-infected-individuals-a-literature-review
#15
REVIEW
Temi Lampejo, Kosh Agarwal, Ivana Carey
Dramatic rises in hepatitis C virus (HCV) coinfection rates in human immunodeficiency virus (HIV)-infected individuals have been observed recently, largely attributable to increasing recreational drug use combined with increased testing for HCV. In the era of direct-acting antiviral (DAA) therapy, treatment of acute HCV infection in HIV-infected individuals with short durations of these drugs may potentially reduce the disease and economic burden associated with HCV infection as well as reducing the likelihood of onward HCV transmission...
November 27, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/29216247/the-glycoprotein-of-vesicular-stomatitis-virus-promotes-release-of-virus-like-particles-from-tetherin-positive-cells
#16
Constantin Brinkmann, Markus Hoffmann, Anastasia Lübke, Inga Nehlmeier, Annika Krämer-Kühl, Michael Winkler, Stefan Pöhlmann
Vesicular stomatitis virus (VSV) release from infected cells is inhibited by the interferon (IFN)-inducible antiviral host cell factor tetherin (BST-2, CD317). However, several viruses encode tetherin antagonists and it is at present unknown whether residual VSV spread in tetherin-positive cells is also promoted by a virus-encoded tetherin antagonist. Here, we show that the viral glycoprotein (VSV-G) antagonizes tetherin in transfected cells, although with reduced efficiency as compared to the HIV-1 Vpu protein...
2017: PloS One
https://www.readbyqxmd.com/read/29214737/efficacy-safety-and-patient-reported-outcomes-of-ledipasvir-sofosbuvir-in-ns3-4a-protease-inhibitor-experienced-individuals-with-hepatitis-c-virus-genotype-1-and-hiv-coinfection-with-and-without-cirrhosis-anrs-hc31-softrih-study
#17
E Rosenthal, C Fougerou-Leurent, A Renault, M P Carrieri, F Marcellin, R Garraffo, E Teicher, H Aumaitre, K Lacombe, F Bailly, E Billaud, S Chevaliez, S Dominguez, M A Valantin, J Reynes, A Naqvi, L Cotte, S Metivier, V Leroy, M Dupon, T Allegre, P De Truchis, V Jeantils, J Chas, D Salmon-Ceron, P Morlat, D Neau, P Perré, L Piroth, S Pol, M Bourlière, G P Pageaux, L Alric, D Zucman, P M Girard, I Poizot-Martin, Y Yazdanpanah, F Raffi, E Le Pabic, C Tual, A Pailhé, I Amri, E Bellissant, J M Molina
OBJECTIVES: Studies evaluating the efficacy and safety of the fixed-dose combination ledipasvir (LDV)/sofosbuvir (SOF) in patients coinfected with HIV-1 and hepatitis C virus (HCV) have mainly included treatment-naïve patients without cirrhosis. We aimed to evaluate the efficacy and safety of this combination in treatment-experienced patients with and without cirrhosis. METHODS: We conducted a multicentre, open-label, double-arm, nonrandomized study in patients coinfected with HIV-1 and HCV genotype 1 with and without cirrhosis, who had good viral suppression on their antiretroviral regimens...
December 7, 2017: HIV Medicine
https://www.readbyqxmd.com/read/29202190/lack-of-truncated-ifitm3-transcripts-in-cells-homozygous-for-the-rs12252-c-variant-that-is-associated-with-severe-influenza-infection
#18
Shokouh Makvandi-Nejad, Henry Laurenson-Schafer, LiLi Wang, Dannielle Wellington, Yan Zhao, Boquan Jin, Ling Qin, Kerry Kite, Hooman K Moghadam, Chaojun Song, Kevin Clark, Philip Hublitz, Alain R Townsend, Hao Wu, Andrew J McMichael, YongHong Zhang, Tao Dong
Interferon-induced transmembrane 3 (IFITM3) is known to restrict the entry of a range of enveloped viruses. The single nucleotide polymorphism rs12252-C within IFITM3 has been shown to be associated with severe influenza A virus infection. It has been suggested that rs12252-C results in expression of a truncated IFITM3 protein lacking the first 21 amino acids. By performing high-throughput RNA sequencing on primary dendritic cells and peripheral blood mononuclear cells isolated from pandemic H1N1 influenza and human immunodeficiency virus-1 (HIV-1) infected patients we show that full-length IFITM3 mRNA is dominantly expressed (>99%) across all rs12252 genotypes...
November 30, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29201183/role-of-mir-124a-in-t-cell-activation-and-immunity-in-aids-patients
#19
Wenge Zhao, Chuansheng Liu, Changhe Shi, Tianli Fan, Kaiqiu Chu, Yanli Ma
The role of microRNA-124a (miR-124a) in the regulation of T cell activation and immunity in patients with AIDS, was studied to provide new insights for the study, diagnosis, alleviation and treatment of AIDS. RT-qPCR technique was used to quantitatively analyze the expression of miR-124a in peripheral blood CD4+ T cells. Dual-luciferase reporter assay system was established to report possible regulatory relations between miR-124a and its potential target gene SIRT1. RT-qPCR and western blot analysis were used to detect the expression level of mRNA and protein of the target genes in T cells...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29194121/hiv-infected-cannabis-users-have-lower-circulating-cd16-monocytes-and-ip-10-levels-compared-to-non-using-hiv-patients
#20
Michael D Rizzo, Robert B Crawford, Joseph E Henriquez, Yasser Aldhamen, Peter Gulick, Andrea Amalfitano, Norbert E Kaminski
OBJECTIVE: Chronic immune activation and elevated numbers of circulating activated monocytes (CD16) are implicated in HIV-associated neuroinflammation. The objective was to compare the level of circulating CD16 monocytes and interferon-γ-inducible protein 10 (IP-10) between HIV-infected cannabis users (HIV+MJ+) and non-cannabis users (HIV+MJ-), and determine whether in vitro Δ-Tetrahydrocannabinol (THC), a constituent of cannabis, affected CD16 expression as well as IP-10 production by monocytes...
November 30, 2017: AIDS
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