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Hepatitis C virus lipids

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https://www.readbyqxmd.com/read/27830380/recovery-of-pan-genotypic-and-genotype-specific-amino-acid-alterations-in-chronic-hepatitis-c-after-viral-clearance-transition-at-the-crossroad-of-metabolism-and-immunity
#1
Ming-Ling Chang, Mei-Ling Cheng, Su-Wei Chang, Hsiang-Yu Tang, Cheng-Tang Chiu, Chau-Ting Yeh, Ming-Shi Shiao
Recovery of amino acid (AA) metabolism and the associated clinical implications in chronic hepatitis C (CHC) patients with sustained virological response (SVR) following anti-hepatitis C virus (HCV) therapy remains elusive. A prospective cohort study was conducted on 222 CHC patients with SVR. Eighty-two age-matched male genotype 1 (G1) and G2 patients underwent paired serum metabolomics analyses with liquid chromatography-tandem mass spectrometry to examine AAs before and 24 weeks after anti-HCV therapy. Before anti-HCV therapy, G1 patients had a higher HCV RNA level than G2 patients...
November 10, 2016: Amino Acids
https://www.readbyqxmd.com/read/27794207/lipid-droplet-hijacking-by-intracellular-pathogens
#2
REVIEW
Philippe Roingeard, Rossana C N Melo
Lipid droplets were long considered to be simple storage structures, but they have recently been shown to be dynamic organelles involved in diverse biological processes, including emerging roles in innate immunity. Various intracellular pathogens, including viruses, bacteria and parasites, specifically target host lipid droplets during their life cycle. Viruses such as hepatitis C virus, dengue virus and rotaviruses use lipid droplets as platforms for assembly. Bacteria, such as mycobacteria and chlamydia, and parasites, such as trypanosomes, use host lipid droplets for nutritional purposes...
October 29, 2016: Cellular Microbiology
https://www.readbyqxmd.com/read/27788588/identification-of-circulating-protein-biomarkers-in-patients-with-hepatocellular-carcinoma-concomitantly-infected-with-chronic-hepatitis-c-virus
#3
Abdel-Hady Ali Abdel-Wahab, Medhat S El-Halawany, Ahmad A Emam, Ammar Elfiky, Zakaria Y Abd Elmageed
CONTEXT: The incidence rate of hepatocellular carcinoma (HCC) is higher in developing countries, and most cases are associated with chronic hepatitis C virus (HCV) infection. OBJECTIVE: To evaluate the circulating proteins as liver biomarkers for identification of HCC associated with HCV infection in Egyptian patients using LC-MS/MS analysis. METHODS: Blood sera were collected from 31 HCC patients and the fractionated proteins were subjected to LC-MS/MS analysis...
October 28, 2016: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/27776194/rna-seq-based-analysis-of-differential-gene-expression-associated-with-hepatitis-c-virus-infection-in-a-cell-culture
#4
Anna Hojka-Osinska, Lucyna Budzko, Agnieszka Zmienko, Agnieszka Rybarczyk, Patrick Maillard, Agata Budkowska, Marek Figlerowicz, Paulina Jackowiak
Hepatitis C virus (HCV) infection is one of the major causes of chronic liver diseases. Unfortunately, the mechanisms of HCV infection-induced liver injury and host-virus interactions are still not well recognized. To better understand these processes we determined the changes in the host gene expression that occur during HCV infection of Huh-7.5 cells. As a result, we identified genes that may contribute to the immune and metabolic cellular responses to infection. Pathway enrichment analysis indicated that HCV induced an increased expression of genes involved in mitogen-activated protein kinases signaling, adipocytokine signaling, cell cycle and nitrogen metabolism...
October 25, 2016: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/27773935/alisol-b-23-acetate-protects-against-non-alcoholic-steatohepatitis-in-mice-via-farnesoid-x-receptor-activation
#5
Qiang Meng, Xing-Ping Duan, Chang-Yuan Wang, Zhi-Hao Liu, Peng-Yuan Sun, Xiao-Kui Huo, Hui-Jun Sun, Jin-Yong Peng, Ke-Xin Liu
AIM: Alisol B 23-acetate (AB23A) is a natural triterpenoid isolated from the traditional Chinese medicine rhizoma alismatis, which exhibits a number of pharmacological activities, including anti-hepatitis virus, anti-cancer and antibacterial effects. In this study we examined whether AB23A protected against non-alcoholic steatohepatitis (NASH) in mice, and the mechanisms underlying the protective effects. METHODS: NASH was induced in mice fed a methionine and choline-deficient (MCD) diet for 4 weeks...
October 24, 2016: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/27773535/n6-methyladenosine-in-flaviviridae-viral-rna-genomes-regulates-infection
#6
Nandan S Gokhale, Alexa B R McIntyre, Michael J McFadden, Allison E Roder, Edward M Kennedy, Jorge A Gandara, Sharon E Hopcraft, Kendra M Quicke, Christine Vazquez, Jason Willer, Olga R Ilkayeva, Brittany A Law, Christopher L Holley, Mariano A Garcia-Blanco, Matthew J Evans, Mehul S Suthar, Shelton S Bradrick, Christopher E Mason, Stacy M Horner
The RNA modification N6-methyladenosine (m(6)A) post-transcriptionally regulates RNA function. The cellular machinery that controls m(6)A includes methyltransferases and demethylases that add or remove this modification, as well as m(6)A-binding YTHDF proteins that promote the translation or degradation of m(6)A-modified mRNA. We demonstrate that m(6)A modulates infection by hepatitis C virus (HCV). Depletion of m(6)A methyltransferases or an m(6)A demethylase, respectively, increases or decreases infectious HCV particle production...
November 9, 2016: Cell Host & Microbe
https://www.readbyqxmd.com/read/27742550/transient-elastography-as-a-noninvasive-assessment-tool-for-hepatopathies-of-different-etiology-in-pediatric-type-1-diabetes-mellitus
#7
Zeinab A Elkabbany, Nancy S Elbarbary, Eman A Ismail, Nesrine A Mohamed, Dina Ragab, Shereen Abdel Alem, Yasmine M Ezzat, Sarah S Maurice, Noha U Hashem
AIM: To identify the prevalence and effect of hepatopathies of different etiologies among pediatric patients with type 1 diabetes mellitus (T1DM) using transient elastography (TE) and its relation to glycemic control. METHODS: One hundred T1DM patients were studied focusing on liver functions, fasting lipid profile, hemoglobin A1c (HbA1c), hepatitis C virus (HCV), serum immunoglobulins, autoimmune antibodies; anti-nuclear antibody (ANA), anti-smooth muscle antibody (ASMA), and anti-liver kidney microsomal antibody (anti-LKM)...
September 26, 2016: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/27707921/the-intra-cellular-cholesterol-transport-inhibitor-u18666a-inhibits-the-exosome-dependent-release-of-mature-hepatitis-c-virus
#8
Fabian Elgner, Huimei Ren, Regina Medvedev, Daniela Ploen, Kiyoshi Himmelsbach, Klaus Boller, Eberhard Hildt
BACKGROUND: HCV particles are described as lipoviroparticles which are released similar to VLDLs. However, the release mechanism is still poorly understood; the canonical ERGIC pathway as well as the endosome-dependent release has been proposed. Recently, also the role of exosomes in the transmission of HCV has been reported. Only a minor fraction of the de novo synthesized lipoviroparticles are finally released by the infected cell. METHODS: To investigate the relevance of MVBs for viral morphogenesis and release, the MVB inhibitor U18666A was used...
October 5, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27706455/food-consumption-of-cirrhotic-patients-comparison-with-the-nutritional-status-and-disease-staging
#9
Flavia Feijó Nunes, Lílian Bassani, Sabrina Alves Fernandes, Maria Eugênia Deutrich, Bianca Coccaro Pivatto, Cláudio Augusto Marroni
Background: Patients with liver disease often present protein-energy malnutrition. The assessment of food intake is very important in the investigation regarding the "health-disease" process. Objective: To assess dietary intake of cirrhotic patients through food record during 3 days, correlating it with the nutritional status of the patient and the stage of the disease. Methods: Cirrhotic outpatients from the Santa Casa de Misericórdia Hospital, RS, Brazil, were assessed...
October 2016: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/27702593/lipids-and-flaviviruses-present-and-future-perspectives-for-the-control-of-dengue-zika-and-west-nile-viruses
#10
REVIEW
Miguel A Martín-Acebes, Ángela Vázquez-Calvo, Juan-Carlos Saiz
Flaviviruses are emerging arthropod-borne pathogens that cause life-threatening diseases such as yellow fever, dengue, West Nile encephalitis, tick-borne encephalitis, Kyasanur Forest disease, tick-borne encephalitis, or Zika disease. This viral genus groups >50 viral species of small enveloped plus strand RNA virus that are phylogenetically closely related to hepatitis C virus. Importantly, the flavivirus life cycle is intimately associated to host cell lipids. Along this line, flaviviruses rearrange intracellular membranes from the endoplasmic-reticulum of the infected cells to develop adequate platforms for viral replication and particle biogenesis...
October 1, 2016: Progress in Lipid Research
https://www.readbyqxmd.com/read/27677955/role-of-oxidative-stress-in-hepatitis-c-virus-induced-hepatocellular-carcinoma
#11
Na Fu, Hui Yao, Yuemin Nan, Liang Qiao
Hepatocellular carcinoma (HCC) is a leading cause of cancer-related death worldwide. Hepatitis C virus (HCV) infection is the predominant cause of chronic liver diseases and HCC, particularly in Western countries. Multiple molecular mechanisms are involved in the development and progression of HCV-related HCC, of which oxidative stress plays a pivotal role. HCV infection induces overproduction of reactive oxygen species (ROS) and impairs the function of endogenous antioxidants. Excessive amount of ROS directly damages DNA, lipids and proteins...
September 26, 2016: Current Cancer Drug Targets
https://www.readbyqxmd.com/read/27664407/anti-adipogenic-and-antiviral-effects-of-l-carnitine-on-hepatitis-c-virus-infection
#12
Yoko Tsukuda, Goki Suda, Seiji Tsunematsu, Jun Ito, Fumiyuki Sato, Katsumi Terashita, Masato Nakai, Takuya Sho, Osamu Maehara, Tomoe Shimazaki, Megumi Kimura, Kenichi Morikawa, Mitsuteru Natsuizaka, Koji Ogawa, Shunsuke Ohnishi, Makoto Chuma, Naoya Sakamoto
Hepatitis C virus (HCV) has been reported to hijack fatty acid metabolism in infected hepatocytes, taking advantage of lipid droplets for virus assembly. In this study, we analyzed the anti-HCV activity of l-carnitine, a substance involved in the transport of fatty acids into mitochondria. JFH-1 or HCV replicon-transfected Huh7.5.1 cells were treated with or without l-carnitine to examine its anti-HCV effects. The effects of l-carnitine on HCV entry, HCV-induced adipogenesis and lipid droplet formation, and HCV-induced oxidative stress were examined...
September 24, 2016: Journal of Medical Virology
https://www.readbyqxmd.com/read/27660673/cd36-genetic-variation-fat-intake-and-liver-fibrosis-in-chronic-hepatitis-c-virus-infection
#13
Omar Ramos-Lopez, Sonia Roman, Erika Martinez-Lopez, Nora A Fierro, Karina Gonzalez-Aldaco, Alexis Jose-Abrego, Arturo Panduro
AIM: To analyze the association of the CD36 polymorphism (rs1761667) with dietary intake and liver fibrosis (LF) in chronic hepatitis C (CHC) patients. METHODS: In this study, 73 patients with CHC were recruited. The CD36 genotype (G > A) was determined by a TaqMan real-time PCR system. Dietary assessment was carried out using a three-day food record to register the daily intake of macronutrients. Serum lipids and liver enzymes were measured by a dry chemistry assay...
September 8, 2016: World Journal of Hepatology
https://www.readbyqxmd.com/read/27614817/polymeric-hepatitis-c-virus-non-structural-protein-5a-nanocapsules-induce-intrahepatic-antigen-specific-immune-responses
#14
Michael Fichter, Keti Piradashvili, Anette Pietrzak-Nguyen, Leah Pretsch, Gabor Kuhn, Susanne Strand, Markus Knuf, Fred Zepp, Frederik R Wurm, Volker Mailänder, Katharina Landfester, Stephan Gehring
Targeting antigen combined with adjuvants to hepatic antigen-presenting cells (APCs) is essential for the induction of intrahepatic T cellular immunity controlling and resolving viral infections of the liver. Intravenous injection of antigen-loaded nanoparticles is a promising approach for the delivery of antigens to liver APCs. Accordingly, polymeric nanocapsules (NCs) synthesized exclusively of hepatitis C virus non-structural protein 5A (NS5A) and the adjuvant monophosphoryl lipid A (MPLA) adsorbed to the nanocapsule surface were developed...
November 2016: Biomaterials
https://www.readbyqxmd.com/read/27591428/mir-148a-and-mir-30a-limit-hcv-dependent-suppression-of-the-lipid-droplet-protein-adrp-in-hcv-infected-cell-models
#15
Nada M El-Ekiaby, Radwa Y Mekky, Sarah E Riad, Dalia S Elhelw, Mohammed El-Sayed, Gamal Esmat, Ahmed I Abdelaziz
OBJECTIVES: Hepatitis C Virus (HCV) promotes lipid droplet (LD) formation and perturbs the expression of the LD associated PAT proteins ADRP and TIP47, to promote its own lifecycle. HCV enhances TIP47 and suppresses ADRP by displacing it from LD surface in infected cell models. We have previously shown that suppression of TIP47 by miR-148a and miR-30a decreased intracellular LDs and HCV RNA. Thus, this study aimed at examining whether this microRNA-mediated suppression of HCV would limit HCV-dependent displacement of ADRP from LDs...
September 3, 2016: Journal of Medical Virology
https://www.readbyqxmd.com/read/27582510/lysophosphatidylcholine-acyltransferase-1-is-downregulated-by-hepatitis-c-virus-impact-on-production-of-lipo-viro-particles
#16
Frauke Beilstein, Matthieu Lemasson, Véronique Pène, Dominique Rainteau, Sylvie Demignot, Arielle R Rosenberg
OBJECTIVE: HCV is intimately linked with the liver lipid metabolism, devoted to the efflux of triacylglycerols stored in lipid droplets (LDs) in the form of triacylglycerol-rich very-low-density lipoproteins (VLDLs): (i) the most infectious HCV particles are those of lowest density due to association with triacylglycerol-rich lipoproteins and (ii) HCV-infected patients frequently develop hepatic steatosis (increased triacylglycerol storage). The recent identification of lysophosphatidylcholine acyltransferase 1 (LPCAT1) as an LD phospholipid-remodelling enzyme prompted us to investigate its role in liver lipid metabolism and HCV infectious cycle...
August 31, 2016: Gut
https://www.readbyqxmd.com/read/27550144/adp-ribosylation-factor-related-protein-1-interacts-with-ns5a-and-regulates-hepatitis-c-virus-propagation
#17
Yun-Sook Lim, Huong T T Ngo, Jihye Lee, Kidong Son, Eun-Mee Park, Soon B Hwang
The life cycle of hepatitis C virus (HCV) is tightly coupled to the lipid metabolism of host cells. In order to identify host factors involved in HCV propagation, we have previously screened a small interfering RNA (siRNA) library targeting host genes that control lipid metabolism and lipid droplet (LD) formation using cell culture-grown HCV (HCVcc)-infected cells. In this study, we selected and characterized the gene encoding ADP-ribosylation factor-related protein 1 (ARFRP1). ARFRP1 is essential for LD growth and is involved in the regulation of lipolysis...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27546480/effect-of-quercetin-on-hepatitis-c-virus-life-cycle-from-viral-to-host-targets
#18
Ángela Rojas, Jose A Del Campo, Sophie Clement, Matthieu Lemasson, Marta García-Valdecasas, Antonio Gil-Gómez, Isidora Ranchal, Birke Bartosch, Juan D Bautista, Arielle R Rosenberg, Francesco Negro, Manuel Romero-Gómez
Quercetin is a natural flavonoid, which has been shown to have anti hepatitis C virus (HCV) properties. However, the exact mechanisms whereby quercetin impacts the HCV life cycle are not fully understood. We assessed the effect of quercetin on different steps of the HCV life cycle in Huh-7.5 cells and primary human hepatocytes (PHH) infected with HCVcc. In both cell types, quercetin significantly decreased i) the viral genome replication; ii) the production of infectious HCV particles and iii) the specific infectivity of the newly produced viral particles (by 85% and 92%, Huh7...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27535051/neglected-but-important-role-of-apolipoprotein-e-exchange-in-hepatitis-c-virus-infection
#19
Zaili Yang, Xiaoning Wang, Xiumei Chi, Fanfan Zhao, Jinxu Guo, Pengjuan Ma, Jin Zhong, Junqi Niu, Xiaoyu Pan, Gang Long
: Hepatitis C virus (HCV) is a major cause of chronic liver disease, infecting approximately 170 million people worldwide. HCV assembly is tightly associated with the lipoprotein pathway. Exchangeable apolipoprotein E (apoE) is incorporated on infectious HCV virions and is important for infectious HCV virion morphogenesis and entry. Moreover, the virion apoE level is positively correlated with its ability to escape E2 antibody neutralization. However, the role of apoE exchange in the HCV life cycle is unclear...
November 1, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27504492/reconstitution-and-functional-analysis-of-a-full-length-hepatitis-c-virus-ns5b-polymerase-on-a-supported-lipid-bilayer
#20
Nam-Joon Cho, Edward A Pham, Rachel J Hagey, Vincent J Lévêque, Han Ma, Klaus Klumpp, Jeffrey S Glenn
Therapeutic targeting of membrane-associated viral proteins is complicated by the challenge of investigating their enzymatic activities in the native membrane-bound state. To permit functional characterization of these proteins, we hypothesized that the supported lipid bilayer (SLB) can support in situ reconstitution of membrane-associated viral protein complexes. As proof-of-principle, we selected the hepatitis C virus (HCV) NS5B polymerase which is essential for HCV genome replication, and determined that the SLB platform enables functional reconstitution of membrane protein activity...
July 27, 2016: ACS Central Science
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