keyword
MENU ▼
Read by QxMD icon Read
search

HCV nonstructural

keyword
https://www.readbyqxmd.com/read/29876401/nmr-and-circular-dichroism-data-for-domain-2-of-the-hcv-ns5a-protein-phosphorylated-by-the-casein-kinase-ii
#1
Luiza M Bessa, Robert Schneider, Xavier Hanoulle
The Hepatitis C Virus (HCV) nonstructural 5A protein (NS5A) is a phosphoprotein (Evans et al., 2004; Ross-Thriepland and Harris, 2014) [1], [2] composed of an N-terminal well-structured domain and two C-terminal intrinsically disordered domains (Moradpour et al., 2007; Bartenschlager et al., 2013; Badillo et al., 2017) [3], [4], [5]. So far, no precise molecular function has been identified for this viral protein (Ross-Thriepland and Harris, 2015) [6] which is required for viral replication (Tellinghuisen et al...
April 2018: Data in Brief
https://www.readbyqxmd.com/read/29792020/daclatasvir-and-asunaprevir-combination-therapy-for-patients-with-chronic-hepatitis-c-virus-genotype-1b-infection-in-real-world
#2
Jae Young Oh, Byung Seok Kim, Chang Hyeong Lee, Jeong Eun Song, Heon Ju Lee, Jung Gil Park, Jae Seok Hwang, Woo Jin Chung, Byoung Kuk Jang, Young Oh Kweon, Won Young Tak, Soo Young Park, Se Young Jang, Jeong Ill Suh, Sang Gyu Kwak
Background/Aims: Previous studies have reported a high rate of sustained virologic response (SVR) and a low rate of serious adverse events with the use of daclatasvir (DCV) and asunaprevir (ASV) combination therapy. We evaluated the efficacy and safety of DCV and ASV combination therapy for patients with chronic hepatitis C virus (HCV) genotype 1b infection in real world. Methods: We enrolled 278 patients (184 treatment-naïve patients) from five hospitals in Daegu and Gyeongsangbuk-do...
May 25, 2018: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29767683/large-outbreak-of-hepatitis-c-virus-associated-with-drug-diversion-by-a-healthcare-technician
#3
Sharon Alroy-Preis, Elizabeth R Daly, Christine Adamski, Jodie Dionne-Odom, Elizabeth A Talbot, Fengxiang Gao, Steffany J Cavallo, Katrina Hansen, Jennifer C Mahoney, Erin Metcalf, Carol Loring, Christine Bean, Jan Drobeniuc, Guo-Liang Xia, Saleem Kamili, José T Montero
Background: In May 2012, the New Hampshire (NH) Division of Public Health Services (DPHS) was notified of 4 persons with newly diagnosed hepatitis C virus (HCV) infection at hospital X. Initial investigation suggested a common link to the hospital cardiac catheterization laboratory (CCL) because the infected persons included 3 CCL patients and a CCL technician. NH DPHS initiated an investigation to determine the source and control the outbreak. Methods: NH DPHS conducted site visits, case patient and employee interviews, medical record and medication use review, and employee and patient HCV testing using enzyme immunoassay for anti-HCV, reverse-transcription polymerase chain reaction for HCV RNA, nonstructural 5B (NS5B) and hypervariable region 1 (HVR1) sequencing, and quasispecies analysis...
May 14, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29725417/identification-and-functional-analysis-of-a-core-gene-module-associated-with-hepatitis-c-virus-induced-human-hepatocellular-carcinoma-progression
#4
Gaobo Bai, Wenling Zheng, Wenli Ma
Hepatitis C virus (HCV)-induced human hepatocellular carcinoma (HCC) progression may be due to a complex multi-step processes. The developmental mechanism of these processes is worth investigating for the prevention, diagnosis and therapy of HCC. The aim of the present study was to investigate the molecular mechanism underlying the progression of HCV-induced hepatocarcinogenesis. First, the dynamic gene module, consisting of key genes associated with progression between the normal stage and HCC, was identified using the Weighted Gene Co-expression Network Analysis tool from R language...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29703432/antiviral-activity-safety-and-tolerability-of-multiple-ascending-doses-of-elbasvir-or-grazoprevir-in-participants-infected-with-hepatitis-c-virus-genotype-1-or-3
#5
Wendy W Yeh, Iain P Fraser, Patricia Jumes, Amelia Petry, Inge De Lepeleire, Martine Robberechts, Christina Reitmann, Kristien Van Dyck, Xiaobi Huang, Zifang Guo, Deborah Panebianco, Robert B Nachbar, Edward O'Mara, John A Wagner, Joan R Butterton, Frank J Dutko, Valentin Moiseev, Zhanna Kobalava, Andreas Hüser, Sorin Visan, Christian Schwabe, Edward Gane, Serghei Popa, Nelea Ghicavii, Markus Uhle, Frank Wagner
PURPOSE: Elbasvir (MK-8742) and grazoprevir (MK-5172; Merck & Co, Inc, Kenilworth, New Jersey) are hepatitis C virus (HCV)-specific inhibitors of the nonstructural protein 5A phosphoprotein and the nonstructural protein 3/4A protease, respectively. The aims of these studies were to evaluate the antiviral activity and safety of different doses of elbasvir or grazoprevir each administered as monotherapy to participants infected with either HCV genotype (GT) 1 or GT3. METHODS: These 2 double-blind, randomized, placebo-controlled, sequential-panel, multiple ascending dose studies were conducted to assess the safety and pharmacodynamics of 5 days of once-daily elbasvir or 7 days of once-daily grazoprevir in adult male participants chronically infected with either HCV GT1 or GT3...
May 2018: Clinical Therapeutics
https://www.readbyqxmd.com/read/29599610/successful-combination-of-direct-antiviral-agents-in-liver-transplanted-patients-with-recurrent-hepatitis-c-virus
#6
Christian Rupp, Theresa Hippchen, Manuel Neuberger, Peter Sauer, Jan Pfeiffenberger, Wolfgang Stremmel, Daniel Nils Gotthardt, Arianeb Mehrabi, Karl-Heinz Weiss
AIM: To analyze the safety and efficiency of direct-acting antiviral (DAA) regimens in liver-transplanted patients with hepatitis C virus (HCV) reinfection. METHODS: Between January 2014 and December 2016, 39 patients with HCV reinfection after liver transplantation were treated at our tertiary referral center with sofosbuvir (SOF)-based regimens, including various combinations with interferon (IFN), daclatasvir (DAC), simeprivir (SIM) and/or ledipasvir (LDV). Thirteen patients were treated with SOF + IFN ± RBV...
March 28, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29563287/nonstructural-protein-5a-impairs-dna-damage-repair-implications-for-hepatitis-c-virus-mediated-hepatocarcinogenesis
#7
Tram T T Nguyen, Eun-Mee Park, Yun-Sook Lim, Soon B Hwang
RAD51-associated protein 1 (RAD51AP1) is a member of the multiprotein complexes postulated to carry out RAD51-mediated homologous recombination and DNA repair in mammalian cells. In the present study, we showed that hepatitis C virus (HCV) NS5A directly bound RAD51AP1 and increased the protein level of RAD51AP1 through modulation of the ubiquitin-proteasome pathway. We also demonstrated that RAD51AP1 protein levels were increased in the liver tissues of HCV-infected patients and NS5A-transgenic mice. Importantly, NS5A impaired DNA repair by disrupting the RAD51/RAD51AP1/UAF1 complex and rendered HCV-infected cells more sensitive to DNA damage...
June 1, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29536554/high-efficacy-of-sofosbuvir-velpatasvir-and-impact-of-baseline-resistance-associated-substitutions-in-hepatitis-c-genotype-3-infection
#8
J von Felden, J Vermehren, P Ingiliz, S Mauss, T Lutz, K G Simon, H W Busch, A Baumgarten, K Schewe, D Hueppe, C Boesecke, J K Rockstroh, M Daeumer, N Luebke, J Timm, J Schulze Zur Wiesch, C Sarrazin, S Christensen
BACKGROUND: Twelve weeks of the pangenotypic direct-acting antiviral (DAA) combination sofosbuvir/velpatasvir (SOF/VEL) was highly efficient in patients with hepatitis C virus (HCV) genotype 3 (GT3) infection in the ASTRAL-3 approval study. However, presence of resistance-associated substitutions (RASs) in the HCV nonstructural protein 5A (NS5A) was associated with lower treatment response. AIM: To assess the efficacy and safety of SOF/VEL ± ribavirin (RBV) and the impact of NS5A RASs and RBV use on treatment outcome in HCV GT3 infection in a real-world setting...
May 2018: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29535204/interactions-between-the-hepatitis-c-virus-nonstructural-2-protein-and-host-adaptor-proteins-1-and-4-orchestrate-virus-release
#9
Fei Xiao, Stanley Wang, Rina Barouch-Bentov, Gregory Neveu, Szuyuan Pu, Melanie Beer, Stanford Schor, Sathish Kumar, Vlad Nicolaescu, Brett D Lindenbach, Glenn Randall, Shirit Einav
Hepatitis C virus (HCV) spreads via secreted cell-free particles or direct cell-to-cell transmission. Yet, virus-host determinants governing differential intracellular trafficking of cell-free- and cell-to-cell-transmitted virus remain unknown. The host adaptor proteins (APs) AP-1A, AP-1B, and AP-4 traffic in post-Golgi compartments, and the latter two are implicated in basolateral sorting. We reported that AP-1A mediates HCV trafficking during release, whereas the endocytic adaptor AP-2 mediates entry and assembly...
March 13, 2018: MBio
https://www.readbyqxmd.com/read/29520035/a-novel-standardized-deep-sequencing-based-assay-for-hepatitis-c-virus-genotype-determination
#10
Christophe Rodriguez, Alexandre Soulier, Vanessa Demontant, Lila Poiteau, Mélanie Mercier-Darty, Magali Bouvier-Alias, Jean-Michel Pawlotsky, Stéphane Chevaliez
Hepatitis C virus (HCV) genotype and subtype (1a/1b) identification is needed to tailor anti-HCV therapy. Currently available methods accurately identify the genotype and differentiate subtypes 1a from 1b. However, these assays have not been designed to identify other HCV subtypes, nor to recognize mixed genotype/subtype infections, emphasizing the need for a high-resolution system based on phylogenetic analysis of reads obtained by deep sequencing of a relevant genome region. The aim of this study was to evaluate the performance of the Sentosa SQ HCV Genotyping Assay, a novel deep sequencing-based assay targeting the HCV nonstructural 5B (NS5B) region, in clinical samples from patients with an indication for anti-HCV therapy...
March 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29504692/efficacy-of-ledipasvir-sofosbuvir-with-or-without-ribavirin-for-12-weeks-in-genotype-1b-hcv-patients-previously-treated-with-a-nonstructural-protein-5a-inhibitor-containing-regimen
#11
Hiroki Ikeda, Tsunamasa Watanabe, Hirohito Shimizu, Tetsuya Hiraishi, Rena Kaneko, Toshiyuki Baba, Hideaki Takahashi, Kotaro Matsunaga, Nobuyuki Matsumoto, Hiroshi Yasuda, Chiaki Okuse, Shogo Iwabuchi, Michihiro Suzuki, Fumio Itoh
AIM: The therapeutic benefit of adding ribavirin (RBV) to 12 weeks of ledipasvir/sofosbuvir (LDV/SOF) for patients who experienced failure of a previous nonstructural protein (NS) 5A inhibitor-containing regimen is unclear. METHODS: A total of 29 genotype 1b HCV patients who had failed prior daclatasvir (DCV) plus asunaprevir (ASV) treatment were retreated for 12 weeks of LDV/SOF, with or without RBV. Antiviral efficacy and predictive factors associating with a sustained virological response at 24 weeks (SVR24) were evaluated retrospectively...
March 5, 2018: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29486389/quantum-molecular-modeling-of-hepatitis-c-virus-inhibition-through-non-structural-protein-5b-polymerase-receptor-binding-of-c-5-arylidene-rhodanines
#12
Krishnan Balasubramanian, Vaishali M Patil
We have carried out high-level quantum chemical computations followed by molecular docking studies on a set of 17C5 -arylidene rhodanine isomers to provide insights into the binding modes with different reported binding pockets of the nonstructural protein 5B (NS5B) polymerase that contribute to the hepatitis C virus (HCV) inhibition. We optimized the multi-target profile of the selected rhodanine analogs to investigate potential non-nucleotide inhibitors (NNIs) by quantum chemical optimization of the 18 isomers followed by docking with quantum chemically optimized structures of each isomer with NS5B polymerase at multiple binding pockets...
April 2018: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29415072/ns2-proteases-from-hepatitis-c-virus-and-related-hepaciviruses-share-composite-active-sites-and-previously-unrecognized-intrinsic-proteolytic-activities
#13
Célia Boukadida, Matthieu Fritz, Brigitte Blumen, Marie-Laure Fogeron, François Penin, Annette Martin
Over the recent years, several homologues with varying degrees of genetic relatedness to hepatitis C virus (HCV) have been identified in a wide range of mammalian species. HCV infectious life cycle relies on a first critical proteolytic event of its single polyprotein, which is carried out by nonstructural protein 2 (NS2) and allows replicase assembly and genome replication. In this study, we characterized and evaluated the conservation of the proteolytic mode of action and regulatory mechanisms of NS2 across HCV and animal hepaciviruses...
February 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29404492/concomitant-proton-pump-inhibitor-use-does-not-reduce-the-efficacy-of-elbasvir-grazoprevir-a-pooled-analysis-of-1-322-patients-with-hepatitis-c-infection
#14
Nancy Reau, Michael N Robertson, Hwa-Ping Feng, Luzelena Caro, Wendy W Yeh, Bach-Yen T Nguyen, Janice Wahl, Eliav Barr, Peggy Hwang, Stephanie O Klopfer
Concomitant proton pump inhibitor (PPI) use reduces plasma concentrations of certain nonstructural protein 5A inhibitors, which are key components of modern hepatitis C infection (HCV) treatments. These reduced concentrations may decrease efficacy, leading to challenging treatment failures due to the development of resistance-associated substitutions. This post-hoc analysis assessed 12-week sustained viral response (SVR12) and pharmacokinetics of fixed-dose combination elbasvir/grazoprevir (EBR/GZR) in patients with HCV infection and self-reported PPI use...
October 2017: Hepatology Communications
https://www.readbyqxmd.com/read/29404457/sofosbuvir-based-regimens-for-the-treatment-of-chronic-hepatitis-c-in-severe-renal-dysfunction
#15
Paula Cox-North, Kelsey L Hawkins, Sean T Rossiter, Marie N Hawley, Renuka Bhattacharya, Charles S Landis
Sofosbuvir (SOF) is a nonstructural 5B polymerase inhibitor with activity in all hepatitis C virus (HCV) genotypes and is the backbone of many anti-HCV drug regimens. SOF is converted into inactive metabolites that undergo renal excretion. Patients with an estimated glomerular filtration rate (eGFR) < 30 mL/minute/1.73 m2 may experience increased drug exposure and thus potential toxicities along with decreased efficacy due to dose reduction or drug discontinuation. This is a single-center study evaluating safety and effectiveness of SOF-based regimens in patients with severe renal dysfunction, defined as eGFR <30 mL/minute/1...
May 2017: Hepatology Communications
https://www.readbyqxmd.com/read/29391202/phylogenetic-analysis-structure-modeling-and-docking-study-of-hcv-ns3-protease-for-the-identification-of-potent-inhibitors
#16
Asad Zia, Sumra Wajid Abbasi, Shabeer Ahmad, Muhammad Zia, Abida Raza
The nonstructural protein 3 (NS3) helicase of HCV is believed to be a plausible target for the identification and designing of potent antiviral drugs. NS3 protein is involved in a positive sense single-stranded viral replication as well as it also cleaves viral poly protein into diverse mature proteins at different time spans. Structural exploration of NS3 revealed that HCV helicase could also act as translocase. In order to identify potential inhibitors for HCV-3a, the current study has been designed. Serum samples from the Pakistani HCV positive patients were collected, sequenced and after purification included in the present study...
April 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29385522/the-hepatitis-c-viral-nonstructural-protein-5a-stabilizes-growth-regulatory-human-transcripts
#17
Liang Guo, Suresh D Sharma, Jose Debes, Daniel Beisang, Bernd Rattenbacher, Irina Vlasova-St Louis, Darin L Wiesner, Craig E Cameron, Paul R Bohjanen
Numerous mammalian proto-oncogene and other growth-regulatory transcripts are upregulated in malignancy due to abnormal mRNA stabilization. In hepatoma cells expressing a hepatitis C virus (HCV) subgenomic replicon, we found that the viral nonstructural protein 5A (NS5A), a protein known to bind to viral RNA, also bound specifically to human cellular transcripts that encode regulators of cell growth and apoptosis, and this binding correlated with transcript stabilization. An important subset of human NS5A-target transcripts contained GU-rich elements, sequences known to destabilize mRNA...
March 16, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29325290/-effect-of-hepatitis-c-virus-nonstructural-protein-5a-and-its-domains-ii-on-hepatocyte-gluconeogenesis-in-mice
#18
J J Zhang, Q Liu, L Qiao
Objective: To investigate the role of hepatitis C virus nonstructural protein 5A (NS5A) and its domains I, II, and III in regulating gluconeogenesis in mice and the underlying mechanism. Methods: A total of 60 male C57BL/6J mice were randomly divided into six groups. Recombinant lentiviral particles with specific expression of full-length NS5A, NS5A domain I, NS5A domain II, or NS5A domain III were injected via the caudal vein to establish a mouse model, and the group without injection and the group with the injection of the lentiviral particles containing enhanced green fluorescent protein (EGFP) were established as negative control...
December 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29285674/hcv-nonstructural-protein-4-is-associated-with-aggressiveness-features-of-breast-cancer
#19
Abdelfattah M Attallah, Mohamed El-Far, Mohamed A Abdelrazek, Mohamed M Omran, Ashraf Z Mahmoud, Hager S Khalifa, Mohamed M Ahmed, Ibrahim El-Dosoky
BACKGROUND: Hepatitis C virus (HCV) has the lymphotropic feature that is supposed to be the reason of related extrahepatic manifestation. HCV viral oncoproteins may participate in the regulation of some gene expression that has been implicated in tumorigenesis. Our aim is to evaluate the HCV-NS4 circulating levels in breast cancer (BC) and to investigate its relation with BC tumor aggressiveness. METHODS: This study was performed among 158 Egyptian women (120 with BC and 38 with benign breast diseases)...
May 2018: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/29250328/sequence-analysis-of-hepatitis-c-virus-nonstructural-protein-3-4a-serine-protease-and-prediction-of-conserved-b-and-t-cell-epitopes
#20
Ayesha Naeem, Yasir Waheed
The hepatitis C virus (HCV) is a global health issue. The nonstructural protein 3 (NS3)-4Agene of HCV is responsible for serine protease activity. The aim of the present study was to develop a global consensus sequence of HCV serine protease, analyze conserved residues, and predict highly conserved B- and T-cell binding epitopes in the NS3-4A protein. A total of 160 NS3-4A sequences from the six genotypes of HCV were refracted in the current study. The amino acid sequences were aligned to obtain a global consensus sequence...
December 2017: Biomedical Reports
keyword
keyword
52719
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"