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Hepatitis C virus lipids

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https://www.readbyqxmd.com/read/29777191/eradication-of-hepatitis-c-virus-is-associated-with-the-attenuation-of-steatosis-as-evaluated-using-a-controlled-attenuation-parameter
#1
Kohei Shimizu, Yoko Soroida, Masaya Sato, Hiromi Hikita, Tamaki Kobayashi, Momoe Endo, Mamiko Sato, Hiroaki Gotoh, Tomomi Iwai, Ryosuke Tateishi, Kazuhiko Koike, Yutaka Yatomi, Hitoshi Ikeda
Chronic hepatitis C virus (HCV) infection was shown to cause hepatic steatosis or suppression of serum lipid levels. However, little is known about the changes in hepatic steatosis following HCV eradication. We aimed to evaluate this issue using the controlled attenuation parameter (CAP), which was recently shown to provide a standardized non-invasive measure of hepatic steatosis. We enrolled 70 patients with chronic HCV infections and steatosis (CAP of over 248 dB/m) who had achieved a sustained viral response at 12 weeks after discontinuation of antiviral treatment using direct-acting antivirals (DAA)...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29765541/the-effect-of-antiviral-therapy-on-serum-lipid-profiles-in-chronic-hepatitis-c
#2
Batbold Batsaikhan, Ching-I Huang, Ming-Lun Yeh, Chung-Feng Huang, Nei-Jen Hou, Zu-Yau Lin, Shinn-Cherng Chen, Jee-Fu Huang, Ming-Lung Yu, Wan-Long Chuang, Jin-Ching Lee, Chia-Yen Dai
Background: Low lipid profile is associated with hepatitis C virus (HCV) infection. Chronic HCV infection is the main cause of liver injury and serum lipid levels during antiviral treatment. We aimed to evaluate the effect of antiviral treatment on the change of lipid profiles during HCV treatment. Methods: Total 863 patients who complete the interferon-based therapy in Kaohsiung Medical University Hospital were included in this study. The lipid profile measured and evaluated in baseline and after 6 months of the treatment...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29729186/cd2-associated-protein-contributes-to-hepatitis-c-virus-propagation-and-steatosis-by-disrupting-insulin-signaling
#3
Huixia Zhang, Chao Zhang, Hong Tang, Shanshan Gao, Fang Sun, Yuan Yang, Weiping Zhou, Yu Hu, Changshu Ke, Yu Wu, Zeyang Ding, Lin Guo, Rongjuan Pei, Xinwen Chen, Man- Sun Sy, Bixiang Zhang, Chaoyang Li
Chronic hepatitis C virus (HCV) infection can result in steatosis, a condition displaying aberrant accumulation of neutral lipid vesicles, the component of lipid droplets (LDs), which are essential for HCV assembly. However, the interplays between HCV infection and steatosis remain unclear. Here, we show that HCV infected cells have higher levels of CD2-associated protein (CD2AP), which plays two distinct, yet tightly-linked roles in HCV pathogenesis: elevated CD2AP binding to NS5A and participating in the transport of NS5A to LDs to facilitate viral assembly; up-regulated CD2AP also interacting with Casitas B-lineage Lymphoma (b) (Cbl/Cbl-b) E3 ligases to degrade insulin receptor substrate 1 (IRS1), which in turn disrupts insulin signaling and increases LDs accumulation thru the IRS1-Akt-AMPK-hormone sensitive lipase (HSL) signaling axis to accommodate viral assembly...
May 5, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29669827/osteopontin-regulates-hcv-replication-and-assembly-via-interaction-with-hcv-proteins-and-lipid-droplets-and-by-binding-to-receptors-%C3%AE-v%C3%AE-3-and-cd44
#4
Jawed Iqbal, Mehuli Sarkar-Dutta, Steven McRae, Akshaya Ramachandran, Binod Kumar, Gulam Waris
Hepatitis C virus (HCV) replication and assembly occur at the specialized site of endoplasmic reticulum (ER) membranes and lipid droplets (LDs), respectively. Recently, several host proteins have been shown to be involved in HCV replication and assembly. In the present study, we demonstrate the important relationship among osteopontin (OPN), ER and LDs. OPN is a secreted phosphoprotein and overexpression of OPN in hepatocellular carcinoma (HCC) tissue can lead to invasion and metastasis. OPN expression is also enhanced in HCV-associated HCC...
April 18, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29623561/nkt-cells-in-liver-diseases
#5
REVIEW
Shasha Zhu, Huimin Zhang, Li Bai
Natural killer T cells are innate-like and tissue-resident lymphocytes, which recognize lipid antigens and are enriched in the liver. Natural killer T cells play important roles in infections, tumors, autoimmune diseases, and metabolic diseases. In this study, we summarize recent findings on biology of natural killer T cells and their roles in hepatitis B virus and hepatitis C virus infection, autoimmune liver diseases, alcoholic liver disease, nonalcoholic fatty liver disease, and hepatocellular carcinoma...
April 6, 2018: Frontiers of Medicine
https://www.readbyqxmd.com/read/29599605/cell-culture-adaptive-mutations-in-hepatitis-c-virus-promote-viral-production-by-enhancing-viral-replication-and-release
#6
Qi Wang, Yue Li, Shun-Ai Liu, Wen Xie, Jun Cheng
AIM: To explore hepatitis C virus (HCV) adaptive mutations or combinations thereof responsible for enhanced viral production and investigate the underlying mechanisms. METHODS: A series of plasmids with adaptive mutations were constructed. After the plasmids were transfected into Huh7.5 cells, we determined the infectious HCV particle titers by NS5A immunofluorescence assays, and detected HCV RNA replication by real-time PCR and protein expression by Western blot...
March 28, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29574072/recovery-of-lipid-metabolic-alterations-in-hepatitis-c-patients-after-viral-clearance-incomplete-restoration-with-accelerated-%C3%AF-oxidation
#7
Su-Wei Chang, Mei-Ling Cheng, Ming-Shi Shiao, Chau-Ting Yeh, Chao-Hung Wang, Chun-Ming Fan, Cheng-Tang Chiu, Ming-Ling Chang
BACKGROUND: How hepatitis C virus (HCV)-associated lipid metabolic alterations recover after sustained virological response (SVR) remains elusive. OBJECTIVE: The aforementioned recovery pattern was investigated. METHODS: In a prospective cohort study of 438 chronic hepatitis C (CHC) patients with SVR after anti-HCV therapy, 164 sex- and age-matched genotype I (G1) and G2 patients underwent paired-serum liquid chromatography-tandem mass spectrometry analyses before and 24 weeks after therapy...
March 2, 2018: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29551287/the-unusual-transmembrane-partition-of-the-hexameric-channel-of-the-hepatitis-c-virus
#8
Wen Chen, Jyoti Dev, Julija Mezhyrova, Liqiang Pan, Alessandro Piai, James J Chou
The p7 protein of the hepatitis C virus (HCV) can oligomerize in membrane to form cation channels. Previous studies showed that the channel assembly in detergent micelles adopts a unique flower-shaped oligomer, but the unusual architecture also presented problems for understanding how this viroporin resides in the membrane. Moreover, the oligomeric state of p7 remains controversial, as both hexamer and heptamer have been proposed. Here we address the above issues using p7 reconstituted in bicelles that mimic a lipid bilayer...
February 27, 2018: Structure
https://www.readbyqxmd.com/read/29540592/domains-of-the-hepatitis-b-virus-small-surface-protein-s-mediating-oligomerization
#9
Sascha Suffner, Nadine Gerstenberg, Maria Patra, Paula Ruibal, Ahmed Orabi, Michael Schindler, Volker Bruss
During hepatitis B virus infections subviral particles (SVP) consisting only of viral envelope proteins and lipids are secreted. Heterologous expression of the small envelope protein S in mammalian cells is sufficient for SVP generation. S is synthesized as a transmembrane protein with N-terminal (TM1), central (TM2), and C-terminal (HCR) transmembrane domains. The loops between TM1 and TM2 (CL) and between TM2 and HCR (LL) are located in the cytosol and in the ER lumen, respectively. To define domains of S mediating oligomerization during SVP morphogenesis S mutants were characterized by expression in transiently transfected cells...
March 14, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29527256/hepatitis-c-virus-morphogenesis-infection-and-therapy
#10
REVIEW
Vladimir Alexei Morozov, Sylvie Lagaye
Hepatitis C virus (HCV) is a major cause of liver diseases including liver cirrhosis and hepatocellular carcinoma. Approximately 3% of the world population is infected with HCV. Thus, HCV infection is considered a public healthy challenge. It is worth mentioning, that the HCV prevalence is dependent on the countries with infection rates around 20% in high endemic countries. The review summarizes recent data on HCV molecular biology, the physiopathology of infection (immune-mediated liver damage, liver fibrosis and lipid metabolism), virus diagnostic and treatment...
February 27, 2018: World Journal of Hepatology
https://www.readbyqxmd.com/read/29506525/serum-lipids-as-an-indicator-for-the-alteration-of-liver-function-in-patients-with-hepatitis-b
#11
Sadia Qamar Arain, Farah Naz Talpur, Naseem Aslam Channa, Muhammad Shahbaz Ali, Hassan Imran Afridi
BACKGROUND: Hepatitis B virus (HBV) exerts an intense impact on host lipid metabolism. Hence the aim of present study is to determine metabolic derangement that occurred in subjects suffering from hepatitis B patients. METHODS: The fasting blood samples were collected from hepatitis B patients (n = 50) attended in Taluka hospital TandoAdam, Sindh with age and gender matched controls (n = 50). Serum lipid profile and fatty acid (FA) composition were analyzed by micro-lab and gas chromatography...
March 5, 2018: Lipids in Health and Disease
https://www.readbyqxmd.com/read/29451090/study-of-changes-in-lipid-profile-and-insulin-resistance-in-egyptian-patients-with-chronic-hepatitis-c-genotype-4-in-the-era-of-daas
#12
Ghada El Sagheer, Elwy Soliman, Asmaa Ahmad, Lamiaa Hamdy
Chronic hepatitis C virus (HCV) infection is associated with altered metabolism, including dyslipidemia and insulin resistance. These contribute to disease progression and influences the response to therapy. To investigate the relationships of new direct-acting antiviral drugs, simeprevir/sofosbuvir, with lipid profile and insulin resistance (IR). Eighty chronic hepatitis C genotype 4 patients were included; they were divided into four groups according to the severity of fibrosis as detected by fibroscan. Forty healthy persons volunteered as a control group...
December 2018: Libyan Journal of Medicine
https://www.readbyqxmd.com/read/29423541/autoantibody-to-apolipoprotein-a-1-in-hepatitis-c-virus-infection-a-role-in-atherosclerosis
#13
Simon H Bridge, Sabrina Pagano, Meleri Jones, Graham R Foster, Dermot Neely, Nicolas Vuilleumier, Margaret F Bassendine
BACKGROUND/PURPOSE: One to three per cent of the world's population has hepatitis C virus (HCV) infection, which is not only a major cause of liver disease and cancer but also associated with an increased risk of atherosclerosis, despite an ostensibly favourable lipid profile. Autoantibodies are frequent in HCV infection and emerging evidence shows that autoantibodies could be valuable for cardiovascular disease (CVD) risk stratification. This study investigated a novel independent biomarker of CVD, autoantibodies to apolipoprotein A-1 (anti-apoA-1 IgG) and lipids in patients with chronic HCV before, during and after direct-acting anti-viral (DAA) therapy...
January 2018: Hepatology International
https://www.readbyqxmd.com/read/29404478/ribavirin-suppresses-hepatic-lipogenesis-through-inosine-monophosphate-dehydrogenase-inhibition-involvement-of-adenosine-monophosphate-activated-protein-kinase-related-kinases-and-retinoid-x-receptor-%C3%AE
#14
Shinya Satoh, Kyoko Mori, Daichi Onomura, Youki Ueda, Hiromichi Dansako, Masao Honda, Shuichi Kaneko, Masanori Ikeda, Nobuyuki Kato
Ribavirin (RBV) has been widely used as an antiviral reagent, specifically for patients with chronic hepatitis C. We previously demonstrated that adenosine kinase, which monophosphorylates RBV into the metabolically active form, is a key determinant for RBV sensitivity against hepatitis C virus RNA replication. However, the precise mechanism of RBV action and whether RBV affects cellular metabolism remain unclear. Analysis of liver gene expression profiles obtained from patients with advanced chronic hepatitis C treated with the combination of pegylated interferon and RBV showed that the adenosine kinase expression level tends to be lower in patients who are overweight and significantly decreases with progression to advanced fibrosis stages...
August 2017: Hepatology Communications
https://www.readbyqxmd.com/read/29385741/calcitriol-inhibits-hcv-infection-via-blockade-of-activation-of-ppar-and-interference-with-endoplasmic-reticulum-associated-degradation
#15
Yu-Min Lin, Hung-Yu Sun, Wen-Tai Chiu, Hui-Chen Su, Yu-Chieh Chien, Lee-Won Chong, Hung-Chuen Chang, Chyi-Huey Bai, Kung-Chia Young, Chiung-Wen Tsao
Vitamin D has been identified as an innate anti-hepatitis C virus (HCV) agent but the possible mechanisms for this issue remain unclear. Here, we clarified the mechanisms of calcitriol-mediated inhibition of HCV infection. Calcitriol partially inhibited HCV infection, nitric oxide (NO) release and lipid accumulation in Huh7.5 human hepatoma cells via the activation of vitamin D receptor (VDR). When cells were pretreated with the activators of peroxisome proliferator-activated receptor (PPAR)-α (Wy14643) and -γ (Ly171883), the calcitriol-mediated HCV suppression was reversed...
January 30, 2018: Viruses
https://www.readbyqxmd.com/read/29382324/apob-codon-4311-polymorphism-is-associated-with-hepatitis-c-virus-infection-through-altered-lipid-metabolism
#16
Rie Harada, Masako Kimura, Yasushi Sato, Tatsuya Taniguchi, Tetsu Tomonari, Takahiro Tanaka, Hironori Tanaka, Naoki Muguruma, Hirohiko Shinomiya, Hirohito Honda, Issei Imoto, Masahiro Sogabe, Toshiya Okahisa, Tetsuji Takayama
BACKGROUND: It has been reported that some single-nucleotide polymorphisms (SNPs) in lipid regulators such as apolipoproteins and cell surface molecules for hepatitis C virus (HCV) entry into hepatocytes are associated with HCV infection. However, it is unknown how HCV infection is affected by altered lipid metabolism resulting from the SNPs. We investigated the relationship between these SNPs and HCV infection status, and also analyzed the mechanism by which these SNPs mediate HCV infection via lipid metabolism alterations...
January 30, 2018: BMC Gastroenterology
https://www.readbyqxmd.com/read/29352312/a-role-for-domain-i-of-the-hepatitis-c-virus-ns5a-protein-in-virus-assembly
#17
Chunhong Yin, Niluka Goonawardane, Hazel Stewart, Mark Harris
The NS5A protein of hepatitis C virus (HCV) plays roles in both virus genome replication and assembly. NS5A comprises three domains, of these domain I is believed to be involved exclusively in genome replication. In contrast, domains II and III are required for the production of infectious virus particles and are largely dispensable for genome replication. Domain I is highly conserved between HCV and related hepaciviruses, and is highly structured, exhibiting different dimeric conformations. To investigate the functions of domain I in more detail, we conducted a mutagenic study of 12 absolutely conserved and surface-exposed residues within the context of a JFH-1-derived sub-genomic replicon and infectious virus...
January 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29327320/phylogenetic-analysis-and-biological-evaluation-of-marine-endophytic-fungi-derived-from-red-sea-sponge-hyrtios-erectus
#18
Mervat Morsy Abbas Ahmed El-Gendy, Shaymaa M M Yahya, Ahmed R Hamed, Maha M Soltan, Ahmed Mohamed Ahmed El-Bondkly
Forty-four endophytic fungal isolates obtained from marine sponge, Hyrtios erectus, were evaluated and screened for their hydrolase activities. Most of the isolates were found to be prolific producers of hydrolytic enzymes. Only 11 isolates exhibited maximum cellular contents of lipids, rhamnolipids, and protein in the fungal isolates under the isolation numbers MERVA5, MERVA22, MERVA25, MERVA29, MERVA32, MERVA34, MERV36, MERVA39, MERVA42, MERVA43, and MERVA44. These isolate extracts exhibit the highest reducing activities against carbohydrate-metabolizing enzymes including α-amylase, α-glucosidase, β-glucosidase, β-glucuronidase, and tyrosinase...
January 12, 2018: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29311405/worsening-of-serum-lipid-profile-after-direct-acting-antiviral-treatment
#19
Stefano Gitto, Arrigo F G Cicero, Elisabetta Loggi, Marina Giovannini, Fabio Conti, Elena Grandini, Valeria Guarneri, Alessandra Scuteri, Giovanni Vitale, Carmela Cursaro, Claudio Borghi, Pietro Andreone
INTRODUCTION: Host lipid metabolism influences viral replication and lifecycle of hepatitis C virus. Our aim was to evaluate changes in glucose and lipid metabolism of patients with chronic hepatitis C after therapy with direct acting antivirals (DAA). MATERIAL AND METHODS: We considered patients consecutively treated between January and November 2015 recording clinical data at baseline and week 24 of follow-up. Frozen serum samples were used for apolipoprotein A1 (apoA1), apolipoprotein B (apoB) and lipoprotein (a) [Lp(a)]...
January 2018: Annals of Hepatology
https://www.readbyqxmd.com/read/29283331/mechanism-of-hepatitis-c-virus-induced-diabetes-mellitus
#20
Usman Ali Ashfaq, Hina Khalid
The hepatitis C virus (HCV), the most predominant cause of liver failure worldwide, is associated with the development of diabetes mellitus (DM) and insulin resistance (IR), both in vivo and in vitro. DM and IR aggravate the rate of fibrosis, cirrhosis, and hepatocellular carcinoma (HCC). Most studies have revealed that patients with HCV are at a greater risk of developing type 2 diabetes (T2D), compared with controls or patients with hepatitis B. In the same way, patients with T2D are highly prone to severe HCV clinical outcomes and increased progression to fibrosis and cirrhosis, ultimately leading to HCC...
2017: Critical Reviews in Eukaryotic Gene Expression
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