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https://www.readbyqxmd.com/read/28445538/gene-expression-patterns-associated-with-neurological-disease-in-human-hiv-infection
#1
Pietro Paolo Sanna, Vez Repunte-Canonigo, Eliezer Masliah, Celine Lefebvre
The pathogenesis and nosology of HIV-associated neurological disease (HAND) remain incompletely understood. Here, to provide new insight into the molecular events leading to neurocognitive impairments (NCI) in HIV infection, we analyzed pathway dysregulations in gene expression profiles of HIV-infected patients with or without NCI and HIV encephalitis (HIVE) and control subjects. The Gene Set Enrichment Analysis (GSEA) algorithm was used for pathway analyses in conjunction with the Molecular Signatures Database collection of canonical pathways (MSigDb)...
2017: PloS One
https://www.readbyqxmd.com/read/28444859/roles-of-samhd1-in-antiviral-defense-autoimmunity-and-cancer
#2
REVIEW
Miaomiao Li, Dong Zhang, Mengying Zhu, Yuxian Shen, Wei Wei, Songcheng Ying, Heinrich Korner, Jun Li
The enzyme, sterile α motif and histidine-aspartic acid domain-containing protein 1 (SAMHD1) diminishes infection of human immunodeficiency virus type 1 (HIV-1) by hydrolyzing intracellular deoxynucleotide triphosphates (dNTPs) in myeloid cells and resting CD4+ T cells. This dNTP degradation reduces the dNTP concentration to a level insufficient for viral cDNA synthesis, thereby inhibiting retroviral replication. This antiviral enzymatic activity can be inhibited by viral protein X (Vpx). The HIV-2/SIV Vpx causes degradation of SAMHD1, thus interfering with the SAMHD1-mediated restriction of retroviral replication...
April 25, 2017: Reviews in Medical Virology
https://www.readbyqxmd.com/read/28440312/expanding-role-for-type-i-interferons-in-restricting-hiv-growth
#3
Stephen J Kent, Anthony D Kelleher
No abstract text is available yet for this article.
April 25, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28439936/hiv-positive-men-who-have-sex-with-men-are-at-high-risk-of-development-of-significant-liver-fibrosis-after-an-episode-of-acute-hepatitis-c
#4
K Steininger, A Boyd, S Dupke, I Krznaric, A Carganico, M Munteanu, S Neifer, M Schuetze, M Obermeier, K Arasteh, A Baumgarten, P Ingiliz
Acute hepatitis C virus infection remains a major health concern in human immunodeficiency virus(HIV)-infected men who have sex with men (MSM). New direct-acting antiviral agent (DAA) combination therapy has not yet been approved for the treatment for acute hepatitis C virus(HCV), thereby potentially causing deferral of HCV treatment. Therefore, we aimed to study the course of liver disease after an episode of acute HCV. This study is a retrospective single-centre cohort of HIV-positive MSM with acute HCV infection...
April 25, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28437431/factors-associated-with-acquired-anti-ifn-%C3%AE-autoantibody-in-patients-with-nontuberculous-mycobacterial-infection
#5
Pakpoom Phoompoung, Nasikarn Ankasekwinai, Manop Pithukpakorn, Suporn Foongladda, Pinklow Umrod, Bhoom Suktitipat, Surakameth Mahasirimongkol, Sasisopin Kiertiburanakul, Yupin Suputtamongkol
BACKGROUND: The clinical syndrome of disseminated nontuberculous mycobacterial (NTM) infection in patients who were previously healthy is now well recognized to be associated with an acquired autoantibody to Interferon gamma (Anti IFN- γ autoantibody). However, the risk factors of this syndrome remain unknown. METHOD: We performed an unmatched case control study among patients with NTM diseases who were diagnosed and treated at Siriraj Hospital, Bangkok, Thailand...
2017: PloS One
https://www.readbyqxmd.com/read/28432579/hcv-cure-and-reinfection-among-people-with-hiv-hcv-coinfection-and-people-who-inject-drugs
#6
REVIEW
Marianne Martinello, Behzad Hajarizadeh, Jason Grebely, Gregory J Dore, Gail V Matthews
PURPOSE OF REVIEW: Highly effective, well-tolerated interferon-free direct-acting antivirals (DAA) have revolutionised hepatitis C virus (HCV) therapeutics, with the opportunity for broad treatment scale-up among marginalised or "high-risk" populations, including people who inject drugs (PWID) and people with HIV/HCV coinfection. RECENT FINDINGS: Concern that HCV reinfection may compromise HCV treatment outcomes is sometimes cited as a reason for not offering treatment to current and former PWID...
April 21, 2017: Current HIV/AIDS Reports
https://www.readbyqxmd.com/read/28430385/significant-reductions-in-alcohol-use-after-hepatitis-c-treatment-results-from-the-french-anrs-co13-hepavih-cohort
#7
Rod Knight, Perrine Roux, Antoine Vilotitch, Fabienne Marcellin, Eric Rosenthal, Laure Esterle, François Boué, David Rey, Lionel Piroth, Stéphanie Dominguez, Philippe Sogni, Dominique Salmon-Ceron, Bruno Spire, Maria Patrizia Carrieri
BACKGROUND AND AIMS: Few data exist on changes to substance use patterns before and after hepatitis C virus (HCV) treatment. We used longitudinal data of HIV-HCV co-infected individuals to examine whether receiving Peg-interferon (Peg-IFN)-based therapy irrespective of HCV clearance could modify tobacco, cannabis and alcohol use. DESIGN: A prospective cohort of HIV-HCV co-infected individuals was enrolled from 2006. Participants' clinical data were retrieved from medical records and socio-demographic and behavioral characteristics were collected by yearly self-administered questionnaires...
April 21, 2017: Addiction
https://www.readbyqxmd.com/read/28426273/preclinical-development-of-bcg-hiva-2auxo-int-harboring-an-integrative-expression-vector-for-a-hiv-tb-pediatric-vaccine-enhancement-of-stability-and-specific-hiv-1-t-cell-immunity
#8
Aakash Mahant, Narcís Saubi, Yoshiki Eto, Núria Guitart, Josep M ª Gatell, Tomáš Hanke, Joan Joseph
One of the critical issues that should be addressed in the development of a BCG-based HIV vaccine is genetic plasmid stability. Therefore, to address this issue we have considered using integrative vectors and the auxotrophic mutant of BCG complemented with a plasmid carrying a wild-type complementing gene. In this study, we have constructed an integrative E. coli-mycobacterial shuttle plasmid, p2auxo.HIVA(int), expressing the HIV-1 clade A immunogen HIVA. This shuttle vector employs an antibiotic resistance-free mechanism for plasmid selection and maintenance...
April 20, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28425451/ifn%C3%AE-protects-neurons-from-damage-in-a-murine-model-of-hiv-1-associated-brain-injury
#9
Victoria E Thaney, Alan M O'Neill, Melanie M Hoefer, Ricky Maung, Ana B Sanchez, Marcus Kaul
Infection with human immunodeficiency virus-1 (HIV-1) causes brain injury. Type I interferons (IFNα/β) are critical mediators of any anti-viral immune response and IFNβ has been implicated in the temporary control of lentiviral infection in the brain. Here we show that transgenic mice expressing HIV-1 envelope glycoprotein 120 in their central nervous system (HIVgp120tg) mount a transient IFNβ response and provide evidence that IFNβ confers neuronal protection against HIVgp120 toxicity. In cerebrocortical cell cultures, neuroprotection by IFNβ against gp120 toxicity is dependent on IFNα receptor 1 (IFNAR1) and the β-chemokine CCL4, as IFNAR1 deficiency and neutralizing antibodies against CCL4, respectively, abolish the neuroprotective effects...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424694/immune-responses-in-the-central-nervous-system-are-anatomically-segregated-in-a-non-human-primate-model-of-human-immunodeficiency-virus-infection
#10
Barbara Tavano, Vicky Tsipouri, Gareth A D Hardy, Caroline M Royle, Michael R Keegan, Dietmar Fuchs, Steven Patterson, Neil Almond, Neil Berry, Claire Ham, Deborah Ferguson, Adriano Boasso
The human immunodeficiency virus (HIV) accesses the central nervous system (CNS) early during infection, leading to HIV-associated cognitive impairment and establishment of a viral reservoir. Here, we describe a dichotomy in inflammatory responses in different CNS regions in simian immunodeficiency virus (SIV)-infected macaques, a model for HIV infection. We found increased expression of inflammatory genes and perivascular leukocyte infiltration in the midbrain of SIV-infected macaques. Conversely, the frontal lobe showed downregulation of inflammatory genes associated with interferon-γ and interleukin-6 pathways, and absence of perivascular cuffing...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28419653/hcv-viremia-associates-with-nk-cell-activation-and-dysfunction-in-anti-retroviral-hiv-hcv-co-infected-subjects
#11
E Papasavvas, L Azzoni, X Yin, Q Liu, J Joseph, A Mackiewicz, B Ross, K M Lynn, J M Jacobson, K Mounzer, J R Kostman, L J Montaner
The impact of Hepatitis C virus (HCV) RNA levels on immune status in chronically HCV mono-infected when compared to HIV/HCV co-infected on antiretroviral therapy (ART) remains poorly understood. A total of 78 African American subjects HCV viremic/naïve to HCV treatment (33 HCV genotype 1 mono-infected, 45 HCV genotype 1/HIV co-infected on ART) were studied. Clinical and liver enzymes measurements were performed. Whole blood was analyzed for immune subset changes by flow-cytometry. Peripheral blood mononuclear cells (PBMC) were used for same-day constitutive and in vitro Interferon (IFN)-α-induced Signal Transducer and Activator of Transcription (STAT) phosphorylation, K562 target cell lysis and K562 target cell recognition-mediated IFN-γ production...
April 17, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28419006/plasma-interferon-gamma-inducible-protein-10-ip10-level-associates-with-abnormal-memory-b-cells-phenotypes-in-perinatal-hiv-infection
#12
German A Contreras, James R Murphy, Gloria P Heresi
We demonstrate for perinatally HIV infected children and adolescents receiving cART and in good clinical status with respect to HIV disease that high concentrations of IP10 associate with increased exhausted memory B cells.
April 17, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28404202/hepatitis-c-treatment-as-prevention-evidence-feasibility-and-challenges
#13
REVIEW
Behzad Hajarizadeh, Jason Grebely, Marianne Martinello, Gail V Matthews, Andrew R Lloyd, Gregory J Dore
The advent of interferon-free direct-acting antiviral therapy for hepatitis C virus (HCV) infection has heightened discussion of treatment as prevention. Rapid scale-up in many settings, and the prospect of further treatment simplification have extended therapeutic optimism towards HCV elimination. However, questions remain regarding the feasability of HCV treatment as prevention, including real world efficacy of direct-acting antiviral therapy, particularly among people who inject drugs, and whether expanded treatment access will be sufficient to reduce HCV transmission...
December 2016: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28404135/incidence-risk-factors-and-prevention-of-hepatitis-c-reinfection-a-population-based-cohort-study
#14
Nazrul Islam, Mel Krajden, Jean Shoveller, Paul Gustafson, Mark Gilbert, Jane A Buxton, Jason Wong, Mark W Tyndall, Naveed Zafar Janjua
BACKGROUND: People remain at risk of reinfection with hepatitis C virus (HCV), even after clearance of the primary infection. We identified factors associated with HCV reinfection risk in a large population-based cohort study in British Columbia, Canada, and examined the association of opioid substitution therapy and mental health counselling with reinfection. METHODS: We obtained data from the British Columbia Hepatitis Testers Cohort, which includes all individuals tested for HCV or HIV at the British Columbia Centre for Disease Control Public Health Laboratory during 1990-2013 (when data were available)...
March 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28397698/ledipasvir-sofosbuvir-for-6-weeks-to-treat-acute-hepatitis-c-virus-genotype-1-or-4-infection-in-patients-with-hiv-coinfection-an-open-label-single-arm-trial
#15
Jürgen K Rockstroh, Sanjay Bhagani, Robert H Hyland, Chohee Yun, Hadas Dvory-Sobol, Wei Zheng, Diana M Brainard, Patrick Ingiliz, Thomas Lutz, Christoph Boesecke, Mark Nelson
BACKGROUND: The latest European Association for the Study of the Liver (EASL) guidelines now recommend that patients with acute hepatitis C virus (HCV) infection should be treated with a combination of sofosbuvir and an NS5A inhibitor for 8 weeks. However, the ideal duration of treatment with interferon-free regimens, particularly in HIV-coinfected individuals, remains unknown. We assessed the efficacy and safety of 6 weeks of ledipasvir-sofosbuvir for acute genotype 1 or 4 HCV in HIV-1-coinfected patients...
May 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28397449/the-neuropsychiatric-aspect-of-the-hcv-infection
#16
REVIEW
Magdalena Więdłocha, Piotr Marcinowicz, Dorota Sokalla, Bartłomiej Stańczykiewicz
HCV infection is significantly more prevalent in the population of psychiatric patients, drug addicts and people tending to undertake risky sexual behaviors than in the general population. This article presents a spectrum of psychopathological symptoms and psychological dysfunctions, an outline of current theories on the neuropathology and psychiatric aspects of HCV infection treatment. The unspecific character of the psychopathological symptoms in the HCV infection makes the process of thorough diagnostics and adequate treatment difficult, thus the specific and characteristic features have been emphasized...
January 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28391912/effects-of-atorvastatin-on-biomarkers-of-immune-activation-inflammation-and-lipids-in-virologically-suppressed-human-immunodeficiency-virus-1-infected-individuals-with-low-density-lipoprotein-cholesterol-130%C3%A2-mg-dl-aids-clinical-trials-group-study-a5275
#17
Daniel E Nixon, Ronald J Bosch, Ellen S Chan, Nicholas T Funderburg, Sally Hodder, Jordan E Lake, Michael M Lederman, Karin L Klingman, Judith A Aberg
BACKGROUND: Persistent immune activation and inflammation in virologically suppressed human immunodeficiency virus (HIV) infection are linked to excess cardiovascular risk. OBJECTIVE: To evaluate atorvastatin as a strategy to reduce cardiovascular risk. METHODS: A5275 was a multicenter, prospective, randomized, double-blind, placebo-controlled, cross-over pilot study of atorvastatin (10 mg/day for 4 weeks then 20 mg/day for 16 weeks) with a planned enrollment of 97 HIV-infected participants ≥18 years old, receiving boosted protease inhibitor-based antiretroviral therapy for ≥6 months, with plasma HIV-1 RNAs below limits of quantification ≥180 days, and fasting low-density lipoprotein (LDL) cholesterol ≥70 and <130 mg/dL...
January 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28374965/closing-the-gap-the-challenges-of-treating-hepatitis-c-virus-genotype-3-infection
#18
Michelle T Martin, Paulina Deming
The efficacy of hepatitis C virus (HCV) treatment has increased over the last 5 years to nearly 100% for many patient groups. Patients with genotype (GT) 3 HCV infection, however, and specifically cirrhotic or treatment-experienced patients, have lower sustained virologic response (SVR) rates than patients with other GTs. As GT 3 presents more clinical challenges than other GTs, this review will focus on the evolution and efficacy of direct-acting antiviral (DAA) treatment options for HCV GT 3 infection after the historical standard of care with pegylated interferon and ribavirin...
April 4, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28367883/quantiferon-%C3%A2-tb-gold-in-tube-test-for-tuberculosis-prevention-in-hiv-infected-patients
#19
Thana Khawcharoenporn, Benjawan Phetsuksiri, Janisara Rudeeaneksin, Sopa Srisungngam, Anucha Apisarnthanarak
Optimal testing strategy for diagnosing latent tuberculosis infection and guiding isoniazid preventive therapy (IPT) is uncertain among HIV-infected patients. A 4-year prospective study was conducted among Thai HIV-infected patients who underwent simultaneous tuberculin skin test (TST) and QuantiFERON®-TB Gold In-tube Test (QFT-IT) at care entry. Based on baseline test results, patients were categorized into 4 groups: 1) QFT-IT-positive, TST-reactive 2) QFT-IT-positive, TST-non-reactive 3) QFT-IT-negative, TST-reactive, or 4) QFT-IT-negative, TST-non-reactive...
March 28, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28366330/cytokine-polymorphisms-are-associated-with-daytime-napping-in-adults-living-with-hiv
#20
Eeeseung Byun, Caryl L Gay, Carmen J Portillo, Clive R Pullinger, Bradley E Aouizerat, Kathryn A Lee
OBJECTIVE/BACKGROUND: Daytime napping longer than one hour has been associated with an increased risk for all-cause mortality. Associations between cytokine polymorphisms and daytime napping in chronic illnesses such as HIV, however, have not been well described. The purpose of this study was to examine cytokine polymorphisms associated with long daytime napping in adults living with HIV. METHODS: A cross-sectional analysis was conducted using a convenience sample of 257 adults living with HIV...
April 2017: Sleep Medicine
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