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https://www.readbyqxmd.com/read/27910154/interferon-free-regimens-improve-portal-hypertension-and-histological-necroinflammation-in-hiv-hcv-patients-with-advanced-liver-disease
#1
P Schwabl, M Mandorfer, S Steiner, B Scheiner, D Chromy, M Herac, T Bucsics, H Hayden, K Grabmeier-Pfistershammer, A Ferlitsch, G Oberhuber, M Trauner, M Peck-Radosavljevic, T Reiberger
BACKGROUND: HIV/HCV co-infected patients show accelerated fibrosis progression and higher risk for complications of portal hypertension (PHT). AIM: To assess the effects of interferon-free therapy on portal pressure, liver histology and plasma biomarkers in HIV/HCV-coinfected patients with PHT. METHODS: Twenty-two patients with paired hepatic venous pressure gradient (HVPG) measurements prior and after successful treatment (SVR) with interferon-free regimens were included...
January 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27898732/chemokine-levels-in-the-penile-coronal-sulcus-correlate-with-hiv-1-acquisition-and-are-reduced-by-male-circumcision-in-rakai-uganda
#2
Jessica L Prodger, Ronald H Gray, Brett Shannon, Kamnoosh Shahabi, Xiangrong Kong, Kate Grabowski, Godfrey Kigozi, Fred Nalugoda, David Serwadda, Maria J Wawer, Steven J Reynolds, Cindy M Liu, Aaron A R Tobian, Rupert Kaul
Individual susceptibility to HIV is heterogeneous, but the biological mechanisms explaining differences are incompletely understood. We hypothesized that penile inflammation may increase HIV susceptibility in men by recruiting permissive CD4 T cells, and that male circumcision may decrease HIV susceptibility in part by reducing genital inflammation. We used multi-array technology to measure levels of seven cytokines in coronal sulcus (penile) swabs collected longitudinally from initially uncircumcised men enrolled in a randomized trial of circumcision in Rakai, Uganda...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27898525/characterization-of-hcv-ns3-protease-variants-in-hcv-hiv-coinfected-patients-by-ultra-deep-sequence-analysis-relationship-to-hepatic-fibrosis
#3
Enass A Abdel-Hameed, Susan D Rouster, Xiang Zhang, Jing Chen, Mario Medvedovic, Zachary D Goodman, Kenneth E Sherman
BACKGROUND: Treatment of HCV/HIV coinfection is now largely based upon utilization of direct acting agents. Pre-treatment viral resistant-associated variants (RAVs) and host liver condition may affect the sustained virological response. In this study, we explored relative prevalence of protease resistance-associated mutations, the evolution of those RAVs following 12 weeks of pegylated interferon alfa exposure, and the role hepatic fibrosis might have on RAV display. METHODS: Thirty nonresponder HCV/ HIV coinfected subjects were evaluated pre- and post- 12 weeks of pegIFN treatment...
November 25, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27896573/greater-decline-in-memory-and-global-neurocognitive-function-in-hiv-hepatitis-c-co-infected-than-in-hepatitis-c-mono-infected-patients-treated-with-pegylated-interferon-and-ribavirin
#4
Theodore R Miller, Jeffrey J Weiss, Norbert Bräu, Douglas T Dieterich, Alicia Stivala, Monica Rivera-Mindt
The human immunodeficiency virus (HIV), hepatitis C virus (HCV), and the treatment of HCV with pegylated interferon and ribavirin (IFN/RBV) have been associated with neurocognitive and psychiatric abnormalities. The goal of this research was to prospectively evaluate neurocognitive functioning among a group of HCV mono-infected and HIV/HCV co-infected patients during the first 24 weeks of IFN/RBV treatment while accounting for practice effects, normal variations in change over time, and variations in IFN/RBV treatment exposure...
November 28, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27881846/naturally-occurring-fc-dependent-antibody-from-hiv-seronegative-individuals-promotes-hiv-induced-ifn-%C3%AE-production
#5
Thomas Lum, Jon A Green
A majority of adults without HIV infection and with a low risk of HIV-exposure have plasma IgG antibodies that enhance the rate and magnitude of HIV-induced interferon alpha (IFN-α) production. Fc-dependent IgG-HIV complexes induce IFN-α rapidly and in high titers in response to HIV concentrations that are too low to otherwise stimulate an effective IFN-α response. IFN-α promoting antibody (IPA) counters HIV-specific inhibition of IFN-α production, and compensates for the inherent delay in IFN-α production common to HIV infection and other viruses...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27881614/performance-characteristics-of-a-new-consensus-commercial-kit-for-hepatitis-d-virus-rna-viral-load-quantification
#6
Frédéric Le Gal, Samira Dziri, Athenaïs Gerber, Chakib Alloui, Zahia Ben Abdesselam, Dominique Roulot, Ségolène Brichler, Emmanuel Gordien
Hepatitis Delta virus (HDV) is responsible for fulminant hepatitis and liver failure, and accelerates evolution towards cirrhosis and hepatocellular carcinoma in hepatitis B virus-infected patients. To date treatment relies upon long-term administration of pegylated alpha-interferon with sustained virological response in 30% of the patients. Very recently, new promising anti HDV therapies have been developed and are already used in clinical trials. HDV-RNA viral load (HDVL) monitoring must be an integral part of the management of the infected-patients...
November 23, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27875663/cross-reactive-potential-of-hiv-1-subtype-c-infected-indian-individuals-against-multiple-hiv-1-potential-t-cell-epitope-gag-variants
#7
Neema Negi, Madhu Vajpayee, Ravinder Singh, Ashutosh Sharma, Kailapuri G Murugavel, Udaykumar Ranga, Madhuri Thakar, Vishnubhatla Sreenivas, Bimal Kumar Das
Vaccine immunogen with expanded T cell coverage for protection against HIV-1 diversity is the need of the hour. This study was undertaken to examine the ability of T cells to respond to a broad spectrum of potential T cell epitope (PTE) peptides containing variable as well as conserved sequences that would most accurately reflect immune responses to different circulating strains. Set of 320 PTE peptides were pooled in a matrix format that included 40 pools of 32 peptides per pool. These pools were used in interferon-γ enzyme-linked immunospot assay for screening and confirmation of HIV-1 PTE Gag-specific T cell immune responses in 34 HIV-1 seropositive Indian individuals...
November 22, 2016: Viral Immunology
https://www.readbyqxmd.com/read/27872683/safe-and-effective-sofosbuvir-based-therapy-in-patients-with-mental-health-disease-on-hepatitis-c-virus-treatment
#8
Lydia Shuk Yee Tang, Jack Masur, Zayani Sims, Amy Nelson, Anu Osinusi, Anita Kohli, Sarah Kattakuzhy, Michael Polis, Shyam Kottilil
AIM: To study impact of baseline mental health disease on hepatitis C virus (HCV) treatment; and Beck's Depression Inventory (BDI) changes with sofosbuvir- and interferon-based therapy. METHODS: This is a retrospective cohort study of participants from 5 studies enrolled from single center trials conducted at the Clinical Research Center of the National Institutes of Health, Bethesda, MD, United States. All participants were adults with chronic HCV genotype 1 infection and naïve to HCV therapy...
November 8, 2016: World Journal of Hepatology
https://www.readbyqxmd.com/read/27866487/tuberculosis-infection-testing-in-hiv-positive-men-who-have-sex-with-men-from-xi-an-china
#9
H N Xin, X W Li, L Zhang, Z Li, H R Zhang, Y Yang, M F Li, B X Feng, H J Li, L Gao
In individuals with latent tuberculosis (TB) infection, those living with human immunodeficiency virus (HIV) had a 20-37 times higher risk of developing active TB compared to those without HIV infection. Systematic testing and treatment of latent TB infection are priorities in HIV-infected persons. In China, the prevalence of HIV infection in men who have sex with men (MSM) has gradually increased in the past decade. However, the prevalence of TB infection has been studied sparsely in HIV-infected MSM. Hence, we conducted a pilot study in MSM living with HIV infection in Xi'an city to evaluate TB infection status by means of interferon-γ release assay (IGRA)...
November 21, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27853753/elevated-circulating-concentrations-of-interferon-gamma-in-latent-tuberculosis-infection
#10
Moises A Huaman, George S Deepe, Carl J Fichtenbaum
BACKGROUND: Latent tuberculosis infection (LTBI) has been associated with increased immune activation. We assessed circulating concentrations of interferon-gamma in persons with LTBI. METHODS: We used the 2011-2012 National Health Nutritional Examination Survey (NHANES) to identify adults with and without LTBI by QuantiFERON(®)-TB Gold In-Tube (QFT) results. Non-LTBI persons were 1:1 age-, gender-, and race-matched to LTBI persons using propensity scores. We compared the plasma concentrations of interferon-gamma measured from the unstimulated, negative control QFT tube between LTBI and non-LTBI persons...
October 2016: Pathogens & Immunity
https://www.readbyqxmd.com/read/27853288/enhancing-virion-tethering-by-bst2-sensitizes-productively-and-latently-hiv-infected-t-cells-to-adcc-mediated-by-broadly-neutralizing-antibodies
#11
Tram N Q Pham, Sabelo Lukhele, Frédéric Dallaire, Gabrielle Perron, Éric A Cohen
Binding of anti-HIV antibodies (Abs) to envelope (Env) glycoproteins on infected cells can mark them for elimination via antibody-dependent cell-mediated cytotoxicity (ADCC). BST2, a type I interferon (IFN)-stimulated restriction factor that anchors nascent Env-containing virions at the surface of infected cells has been shown to enhance ADCC functions. In a comprehensive analysis of ADCC potency by neutralizing anti-HIV Abs (NAbs), we show in this study that NAbs are capable of mediating ADCC against HIV-infected T cells with 3BNC117, PGT126 and PG9 being most efficient...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847245/celastrol-inhibits-dengue-virus-replication-via-up-regulating-type-i-interferon-and-downstream-interferon-stimulated-responses
#12
Jung-Sheng Yu, Chin-Kai Tseng, Chun-Kuang Lin, Yao-Chin Hsu, Yu-Hsuan Wu, Ching-Liang Hsieh, Jin-Ching Lee
ETHNOPHARMACOLOGICAL RELEVANCE AND AIM OF THE STUDY: Tripterygium wilfordii (lei gong teng; Thunder of God Vine), a member of the Celastraceae family, is a medicinal plant used to treat a range of illnesses. Celastrol is a quinone methide triterpene and the most abundant bioactive constituent isolated from the root extracts of T. wilfordii. Previous studies have shown that celastrol exhibits antiviral activity against HIV and SARS-CoV. To date, no investigations of the anti-DENV activity of celastrol have been reported...
November 12, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27822960/limited-usefulness-of-the-interferon-gamma-release-assay-in-patients-with-hiv-infections-and-negative-tuberculin-skin-test-results-in-a-country-with-an-intermediate-tuberculosis-burden
#13
Min Jae Kim, Eun Young Nam, Kyoung Un Park, Pyeong Gyun Choe, Wan Beom Park, Kyoung-Ho Song, Eu Suk Kim, Hong Bin Kim, Myoung-Don Oh, Nam Joong Kim
No abstract text is available yet for this article.
November 8, 2016: Infectious Diseases
https://www.readbyqxmd.com/read/27821119/insufficient-natural-killer-cell-responses-against-retroviruses-how-to-improve-nk-cell-killing-of-retrovirus-infected-cells
#14
REVIEW
Elisabeth Littwitz-Salomon, Ulf Dittmer, Kathrin Sutter
Natural killer (NK) cells belong to the innate immune system and protect against cancers and a variety of viruses including retroviruses by killing transformed or infected cells. They express activating and inhibitory receptors on their cell surface and often become activated after recognizing virus-infected cells. They have diverse antiviral effector functions like the release of cytotoxic granules, cytokine production and antibody dependent cellular cytotoxicity. The importance of NK cell activity in retroviral infections became evident due to the discovery of several viral strategies to escape recognition and elimination by NK cells...
November 8, 2016: Retrovirology
https://www.readbyqxmd.com/read/27818588/update-on-occult-hepatitis-b-virus-infection
#15
REVIEW
Manoochehr Makvandi
The event of mutations in the surface antigen gene of hepatitis B virus (HBV) results in undetectable hepatitis B surface antigen with positive/negative anti-hepatitis B core (anti-HBc) antibody status in serum and this phenomenon is named occult hepatitis B infection (OBI). The presence of anti-HBc antibody in serum is an important key for OBI tracking, although about 20% of OBI cases are negative for anti-HBc antibody. The diagnosis of OBI is mainly based on polymerase chain reaction (PCR) and real-time PCR assays...
October 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27815225/boceprevir-plus-pegylated-interferon-ribavirin-to-re-treat-hepatitis-c-virus-genotype-1-in-hiv-hcv-co-infected-patients-final-results-of-the-spanish-boc-hiv-hcv-study
#16
M Laguno, M A Von Wichmann, E Van den Eynde, J Navarro, C Cifuentes, J Murillas, S Veloso, M Martínez-Rebollar, J M Guardiola, A Jou, J L Gómez-Sirvent, M Cervantes, J A Pineda, S López-Calvo, A Carrero, M L Montes, E Deig, A Tapiz, J D Ruiz-Mesa, A Cruceta, E de Lazzari, J Mallolas
INTRODUCTION: Boceprevir (BOC) was one of the first oral inhibitors of hepatitis C virus (HCV) NS3 protease to be developed. This study assessed the safety and efficacy of BOC+pegylated interferon-α2a/ribavirin (PEG-IFN/RBV) in the retreatment of HIV-HCV co-infected patients with HCV genotype 1. METHODS: This was a phase III prospective trial. HIV-HCV (genotype 1) co-infected patients from 16 hospitals in Spain were included. These patients received 4 weeks of PEG-IFN/RBV (lead-in), followed by response-guided therapy with PEG-IFN/RBV plus BOC (a fixed 44 weeks was indicated in the case of cirrhosis)...
November 1, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27809682/human-immunodeficiency-virus-1-impairs-ifn-alpha-production-induced-by-tlr-7-agonist-in-plasmacytoid-dendritic-cells
#17
Ashwini Dhamanage, Madhuri Thakar, Ramesh Paranjape
Plasmacytoid dendritic cells (pDCs) play an important role in innate immune response against viruses, mainly through interferon-α (IFN-α) secretion. Impaired IFN-α secretion has been observed in patients with acute human immunodeficiency virus type 1 (HIV-1) infection and the reasons for this impairment are still obscure. To know the grounds behind this situation, HIV-1 viral copy numbers similar to those found in primary HIV-1 infection were used to stimulate peripheral blood mononuclear cells (PBMCs) and pDCs in this study...
November 3, 2016: Viral Immunology
https://www.readbyqxmd.com/read/27800521/continued-elevation-of-interleukin-18-and-interferon-%C3%AE-after-initiation-of-antiretroviral-therapy-and-clinical-failure-in-a-diverse-multicountry-human-immunodeficiency-virus-cohort
#18
Ashwin Balagopal, Nikhil Gupte, Rupak Shivakoti, Andrea L Cox, Wei-Teng Yang, Sima Berendes, Noluthando Mwelase, Cecilia Kanyama, Sandy Pillay, Wadzanai Samaneka, Breno Santos, Selvamuthu Poongulali, Srikanth Tripathy, Cynthia Riviere, Javier R Lama, Sandra W Cardoso, Patcharaphan Sugandhavesa, Richard D Semba, James Hakim, Mina C Hosseinipour, Nagalingeswaran Kumarasamy, Ian Sanne, David Asmuth, Thomas Campbell, Robert C Bollinger, Amita Gupta
Background.  We assessed immune activation after antiretroviral therapy (ART) initiation to understand clinical failure in diverse settings. Methods.  We performed a case-control study in ACTG Prospective Evaluation of Antiretrovirals in Resource-Limited Settings (PEARLS). Cases were defined as incident World Health Organization Stage 3 or 4 human immunodeficiency virus (HIV) disease or death, analyzed from ART weeks 24 (ART24) to 96. Controls were randomly selected. Interleukin (IL)-6, interferon (IFN)-γ-inducible protein-10, IL-18, tumor necrosis factor-α, IFN-γ, and soluble CD14 (sCD14) were measured pre-ART and at ART24 in plasma...
September 2016: Open Forum Infectious Diseases
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
#19
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...
October 31, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27795392/hiv-1-tat-recruits-hdm2-e3-ligase-to-target-irf-1-for-ubiquitination-and-proteasomal-degradation
#20
Anna Lisa Remoli, Giulia Marsili, Edvige Perrotti, Chiara Acchioni, Marco Sgarbanti, Alessandra Borsetti, John Hiscott, Angela Battistini
: In addition to its ability to regulate HIV-1 promoter activation, the viral transactivator Tat also functions as a determinant of pathogenesis and disease progression by directly and indirectly modulating the host anti-HIV response, largely through the capacity of Tat to interact with and modulate the activities of multiple host proteins. We previously demonstrated that Tat modulated both viral and host transcriptional machinery by interacting with the cellular transcription factor interferon regulatory factor 1 (IRF-1)...
October 18, 2016: MBio
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