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Gao R, Lu Y, Zhang W, Zhang Z. The Application of Berberine in Fibrosis and the Related Diseases. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2024; 52:753-773. [PMID: 38716621 DOI: 10.1142/s0192415x24500307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
The formation of fibrotic tissue, characterized by the excessive accumulation of extracellular matrix (ECM) components such as collagen and fibronectin, is a normal and crucial stage of tissue repair in all organs. The over-synthesis, deposition, and remodeling of ECM components lead to organ dysfunction, posing a significant medical burden. Berberine, an isoquinoline alkaloid, is commonly used in the treatment of gastrointestinal diseases. With the deepening of scientific research, it has been gradually discovered that berberine also plays an important role in fibrotic diseases. In this review, we systematically introduce the effective role of berberine in fibrosis-related diseases. Specifically, this paper aims to provide a comprehensive review of the therapeutic role of berberine in treating fibrosis in organs such as the heart, liver, lungs, and kidneys. By summarizing its various pathways and mechanisms of action, including the inhibition of the transforming growth factor-[Formula: see text]/Smad signaling pathway, PI3K/Akt signaling pathway, MAPK signaling pathway, RhoA/ROCK signaling, and mTOR/p70S6K signaling pathway, as well as its activation of the Nrf2-ARE signaling pathway, AMPK signaling pathway, phosphorylated Smad 2/3 and Smad 7, and other signaling pathways, this review offers additional evidence to support the treatment of fibrotic diseases.
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Affiliation(s)
- Rongmao Gao
- Department of Critical Care Medicine, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, P. R. China
| | - Yuanyu Lu
- Department of Critical Care Medicine, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, P. R. China
| | - Wei Zhang
- Department of Critical Care Medicine, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu 610057, P. R. China
| | - Zhao Zhang
- Department of Critical Care Medicine, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, P. R. China
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2
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Wang J, Wu Z, Chen X, Sun Y, Ma S, Weng J, Zhang Y, Dong K, Shao J, Zheng S. Network Pharmacology, Molecular Docking Analysis and Molecular Dynamics Simulation of Scutellaria baicalensis in the Treatment of Liver Fibrosis. Curr Pharm Des 2024; 30:1326-1340. [PMID: 38616754 DOI: 10.2174/0113816128297074240327090020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/03/2024] [Accepted: 03/11/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND Traditional Chinese medicine Scutellaria Baicalensis (SB), one of the clinical firstline heat-clearing drugs, has obvious symptomatic advantages for hepatic fibrosis with dampness-heat stasis as its syndrome. We aim to predict and validate the potential mechanism of Scutellaria baicalensis active ingredients against liver fibrosis more scientifically and effectively. METHODS The underlying mechanism of Scutellaria baicalensis in inhibiting hepatic fibrosis was studied by applying network pharmacology, molecular docking and molecular dynamics simulation. Expression levels of markers in activated Hepatic Stellate Cells (HSC) after administration of three Scutellaria baicalensis extracts were determined by Western blot and Real-time PCR, respectively, in order to verify the anti-fibrosis effect of the active ingredients Results: There are 164 common targets of drugs and diseases screened and 115 signaling pathways obtained, which were mainly associated with protein phosphorylation, senescence and negative regulation of the apoptotic process. Western blot and Real-time PCR showed that Scutellaria baicalensis extracts could reduce the expression of HSC activation markers, and Oroxylin A had the strongest inhibitory effect on it. Molecular docking results showed that Oroxylin A had high binding activity to target proteins. Molecular dynamics simulation demonstrates promising stability of the Oroxylin A-AKT1 complex over the simulated MD time of 200 ns. CONCLUSION Scutellaria baicalensis active ingredients may inhibit HSC proliferation, reduce the generation of pro-inflammatory factors and block the anti-inflammatory effect of inflammatory signal transduction by inducing HSC apoptosis and senescence, thus achieving the effect of anti-fibrosis.
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Affiliation(s)
- Junrui Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zhuoqing Wu
- Nanjing Foreign Language School, Nanjing, China
| | - Xiaolei Chen
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ying Sun
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Shuyao Ma
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jingdan Weng
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yuxin Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Keke Dong
- PharmaBlock Sciences (Nanjing), Inc, Nanjing, China
| | - Jiangjuan Shao
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Shizhong Zheng
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
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3
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Xi Y, LaCanna R, Ma HY, N'Diaye EN, Gierke S, Caplazi P, Sagolla M, Huang Z, Lucio L, Arlantico A, Jeet S, Brightbill H, Emson C, Wong A, Morshead KB, DePianto DJ, Roose-Girma M, Yu C, Tam L, Jia G, Ramalingam TR, Marsters S, Ashkenazi A, Kim SH, Kelly R, Wu S, Wolters PJ, Feldstein AE, Vander Heiden JA, Ding N. A WISP1 antibody inhibits MRTF signaling to prevent the progression of established liver fibrosis. Cell Metab 2022; 34:1377-1393.e8. [PMID: 35987202 DOI: 10.1016/j.cmet.2022.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 06/06/2022] [Accepted: 07/19/2022] [Indexed: 01/18/2023]
Abstract
Fibrosis is the major risk factor associated with morbidity and mortality in patients with non-alcoholic steatohepatitis (NASH)-driven chronic liver disease. Although numerous efforts have been made to identify the mediators of the initiation of liver fibrosis, the molecular underpinnings of fibrosis progression remain poorly understood, and therapies to arrest liver fibrosis progression are elusive. Here, we identify a pathway involving WNT1-inducible signaling pathway protein 1 (WISP1) and myocardin-related transcription factor (MRTF) as a central mechanism driving liver fibrosis progression through the integrin-dependent transcriptional reprogramming of myofibroblast cytoskeleton and motility. In mice, WISP1 deficiency protects against fibrosis progression, but not fibrosis onset. Moreover, the therapeutic administration of a novel antibody blocking WISP1 halted the progression of existing liver fibrosis in NASH models. These findings implicate the WISP1-MRTF axis as a crucial determinant of liver fibrosis progression and support targeting this pathway by antibody-based therapy for the treatment of NASH fibrosis.
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Affiliation(s)
- Ying Xi
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA
| | - Ryan LaCanna
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA
| | - Hsiao-Yen Ma
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA
| | - Elsa-Noah N'Diaye
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA
| | - Sarah Gierke
- Department of Pathology, Genentech, South San Francisco, CA, USA
| | - Patrick Caplazi
- Department of Pathology, Genentech, South San Francisco, CA, USA
| | - Meredith Sagolla
- Department of Pathology, Genentech, South San Francisco, CA, USA
| | - Zhiyu Huang
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Laura Lucio
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Alexander Arlantico
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Surinder Jeet
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Hans Brightbill
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Claire Emson
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Aaron Wong
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Katrina B Morshead
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA
| | - Daryle J DePianto
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA
| | - Merone Roose-Girma
- Department of Molecular Biology, Genentech, South San Francisco, CA, USA
| | - Charles Yu
- Department of Molecular Biology, Genentech, South San Francisco, CA, USA
| | - Lucinda Tam
- Department of Molecular Biology, Genentech, South San Francisco, CA, USA
| | - Guiquan Jia
- Department of Biomarker Discovery, Genentech, South San Francisco, CA, USA
| | | | - Scot Marsters
- Department of Cancer Immunology, Genentech, South San Francisco, CA, USA
| | - Avi Ashkenazi
- Department of Cancer Immunology, Genentech, South San Francisco, CA, USA
| | - Si Hyun Kim
- Department of Antibody Engineering, Genentech, South San Francisco, CA, USA
| | - Ryan Kelly
- Department of Antibody Engineering, Genentech, South San Francisco, CA, USA
| | - Shuang Wu
- Department of Antibody Engineering, Genentech, South San Francisco, CA, USA
| | - Paul J Wolters
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Ariel E Feldstein
- Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | | | - Ning Ding
- Department of Discovery Immunology, Genentech, South San Francisco, CA, USA.
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Hasani Jusufi A, Trajkovska M, Popova-Jovanovska R, Calovska-Ivanova V, Ramadani A, Andreevski V. The Role and Significance of Non-invasive Methods, with a Particular Focus on Shear Wave Elastography in Hepatic Fibrosis Staging. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.9048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Shear Wave Elastography (SWE) represents a new, non-invasive method, used in the diagnosis of diffuse liver diseases. The method has been widely used instead of liver biopsy - an invasive procedure with potential major risk complications. Compared to liver biopsy, SWE provides an examination of larger areas of the liver, thus providing better staging of hepatic fibrosis.
30 patients were included in the study on basis of previous clinical, biochemical, and ultrasound findings indicating a presence of a chronic liver lesion. Patients were divided into three groups: 6 patients with steatosis, 13 patients with viral hepatitis, and 11 patients with liver cirrhosis. Liver damage biochemical markers, serum markers of liver fibrosis, and SWE were determined in all patients. Statistical analysis revealed a positive correlation between SWE results, and the values of biochemical markers of the hepatic lesion, as well as serum markers of liver fibrosis.
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Differential Expression of the Host Lipid Regulators ANGPTL-3 and ANGPTL-4 in HCV Infection and Treatment. Int J Mol Sci 2021; 22:ijms22157961. [PMID: 34360721 PMCID: PMC8348577 DOI: 10.3390/ijms22157961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 11/29/2022] Open
Abstract
Host lipid metabolism reprogramming is essential for hepatitis C virus (HCV) infection and progression to severe liver disease. Direct-acting antivirals (DAAs) achieve a sustained virological response (SVR) in most patients, but virus eradication does not always protect against hepatocellular carcinoma (HCC). Angiopoietin-like protein-3 (ANGPTL-3) and angiopoietin-like protein-4 (ANGPTL-4) regulate the clearance of plasma lipids by inhibiting cellular lipase activity and possess emerging roles in tumourigenesis. We used ELISA and RT-qPCR to investigate ANGPTL-3 and ANGPTL-4 expression in HCV patients with characterised fibrosis throughout the natural history of hepatitis C and in long-term HCV infection in vitro, before and after DAA treatment. ANGPTL-3 was decreased in patients with advanced fibrosis compared to other disease stages, while ANGPTL-4 was progressively increased from acute infection to cirrhosis and HCC, peaking at the advanced fibrosis stage. Only ANGPTL-3 mRNA was down-regulated during early infection in vitro, although both ANGPTLs were increased later. DAA treatment did not alter ANGPTL-3 levels in advanced fibrosis/cirrhosis and in HCV infection in vitro, in contrast to ANGPTL-4. The association between ANGPTLs and fibrosis in HCV infection was underlined by an inverse correlation between the levels of ANGPTLs and serum transforming growth factor- β (TGF-β). Collectively, we demonstrate the pivotal role of advanced fibrosis in defining the expression fate of ANGPTLs in HCV infection and after treatment and propose a role for ANGPTL-3 as a contributor to post-treatment deregulation of lipid metabolism that could predispose certain individuals to HCC development.
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Sinha A, Singh AK, Kadni TS, Mullick J, Sahu A. Virus-Encoded Complement Regulators: Current Status. Viruses 2021; 13:v13020208. [PMID: 33573085 PMCID: PMC7912105 DOI: 10.3390/v13020208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 11/29/2022] Open
Abstract
Viruses require a host for replication and survival and hence are subjected to host immunological pressures. The complement system, a crucial first response of the host immune system, is effective in targeting viruses and virus-infected cells, and boosting the antiviral innate and acquired immune responses. Thus, the system imposes a strong selection pressure on viruses. Consequently, viruses have evolved multiple countermeasures against host complement. A major mechanism employed by viruses to subvert the complement system is encoding proteins that target complement. Since viruses have limited genome size, most of these proteins are multifunctional in nature. In this review, we provide up to date information on the structure and complement regulatory functions of various viral proteins.
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Affiliation(s)
- Anwesha Sinha
- Complement Biology Laboratory, National Centre for Cell Science, S. P. Pune University Campus, Ganeskhind, Pune 411007, India; (A.S.); (A.K.S.); (T.S.K.)
| | - Anup Kumar Singh
- Complement Biology Laboratory, National Centre for Cell Science, S. P. Pune University Campus, Ganeskhind, Pune 411007, India; (A.S.); (A.K.S.); (T.S.K.)
| | - Trupti Satish Kadni
- Complement Biology Laboratory, National Centre for Cell Science, S. P. Pune University Campus, Ganeskhind, Pune 411007, India; (A.S.); (A.K.S.); (T.S.K.)
| | - Jayati Mullick
- Polio Virology Group, Microbial Containment Complex, ICMR-National Institute of Virology, Pune 411021, India;
| | - Arvind Sahu
- Complement Biology Laboratory, National Centre for Cell Science, S. P. Pune University Campus, Ganeskhind, Pune 411007, India; (A.S.); (A.K.S.); (T.S.K.)
- Correspondence: ; Tel.: +91-20-2570-8083; Fax: +91-20-2569-2259
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Mohamed AA, Hemeda AA, Aziz RK, Abdel-Hakeem MS, Ali-Tammam M. Body mass index (BMI) and alpha-fetoprotein (AFP) level correlate with the severity of HCV-induced fibrosis in a cohort of Egyptian patients with chronic HCV. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2020. [DOI: 10.1186/s43094-020-00085-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Abstract
Background
Viral hepatitis is the seventh leading cause of mortality globally, and half of this mortality is attributed to hepatitis C virus (HCV). Egypt has the highest HCV prevalence worldwide, with an estimated 14.7% of the population being HCV-positive. HCV infection is the primary cause of liver fibrosis, cirrhosis, and hepatocellular carcinoma. Liver fibrosis varies in severity during chronic HCV infection, and 10–20% of chronic hepatitis C (CHC) patients with severe fibrosis develop cirrhosis. The goal of this work was to assess the clinico-demographic predictors of severity of HCV-induced fibrosis in a cohort of Egyptian patients.
Results
A cohort of Egyptian patients with chronic HCV genotype 4a infection showed significant association between severe fibrosis stages and obesity, represented by a higher body mass index (BMI), low albumin level, high alpha-fetoprotein (AFP) level, low thyroid-stimulating hormone (TSH) level, and high alkaline phosphatase (ALP) level. Multivariate analysis delineated BMI, TSH, and ALP as independent significant variables that could predict the risk of fibrosis severity in HCV infections.
Conclusion
This study argues in favor of using the biomarker profile of CHC patients infected with HCV genotype 4a to identify patients at higher risk of developing severe fibrosis, which is a necessary first step towards precision medicine via patient stratification.
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Peña-Asensio J, Sanz-de-Villalobos E, Miquel J, Larrubia JR. Tumor necrosis family receptor superfamily member 9/tumor necrosis factor receptor-associated factor 1 pathway on hepatitis C viral persistence and natural history. World J Hepatol 2020; 12:754-765. [PMID: 33200014 PMCID: PMC7643212 DOI: 10.4254/wjh.v12.i10.754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/01/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
Hepatitis C virus (HCV) infection is an excellent immunological model for understanding the mechanisms developed by non-cytopathic viruses and tumors to evade the adaptative immune response. The antigen-specific cytotoxic T cell response is essential for keeping HCV under control, but during persistent infection, these cells become exhausted or even deleted. The exhaustion process is progressive and depends on the infection duration and level of antigenemia. During high antigenic load and long duration of infection, T cells become extremely exhausted and ultimately disappear due to apoptosis. The development of exhaustion involves the impairment of positive co-stimulation induced by regulatory cytokines, such as transforming growth factor beta 1. This cytokine downregulates tumor necrosis factor receptor (TNFR)-associated factor 1 (TRAF1), the signal transducer of the T cell co-stimulatory molecule TNFR superfamily member 9 (known as 4-1BB). This impairment correlates with the low reactivity of T cells and an exhaustion phenotype. Treatment with interleukin-7 in vitro restores TRAF1 expression and rescues T cell effector function. The process of TRAF1 loss and its in vitro recovery is hierarchical, and more affected by severe disease progression. In conclusion, TRAF1 dynamics on T cells define a new pathogenic model that describes some aspects of the natural history of HCV, and sheds light on novel immunotherapy strategies for chronic viral infections and cancer.
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Affiliation(s)
- Julia Peña-Asensio
- Department of Systems Biology, Guadalajara University Hospital. University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
| | - Eduardo Sanz-de-Villalobos
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
| | - Joaquín Miquel
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
| | - Juan Ramón Larrubia
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
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Zhang M, O'Keefe D, Iwamoto M, Sann K, Kien A, Hang V, Brucker C, Jolivet P, Ly S, Chhit D, Balkan S, Marquardt T, Le Paih M, Dousset JP. High sustained viral response rate in patients with hepatitis C using generic sofosbuvir and daclatasvir in Phnom Penh, Cambodia. J Viral Hepat 2020; 27:886-895. [PMID: 32358826 DOI: 10.1111/jvh.13311] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 03/30/2020] [Indexed: 02/07/2023]
Abstract
Safe and efficacious pan-genotypic direct-acting antiviral (DAA) regimens, such as sofosbuvir and daclatasvir (SOF + DCV), facilitate simplified models of care for hepatitis C virus (HCV). However, in Cambodia access to HCV testing and treatment has typically been low. In response, Médecins Sans Frontières (MSF) implemented a HCV testing and treatment pilot project in Phnom Penh, Cambodia in 2016. This project provides the first real-world evidence of SOF + DCV effectiveness across a large patient cohort using a simplified care model in Cambodia. Patients treated with SOF + DCV from September 2016 to June 2019 were included in the analysis. Medical standard operational procedures (SOPs) were simplified significantly across the study period. Treatment effectiveness was assessed by sustained viral response at 12 weeks post-treatment (SVR12) according to a modified intention-to-treat methodology. Treatment safety was assessed by clinical outcome and occurrence of serious and nonserious adverse events (S/AE). Of 9158 patients, median age was 57 years and 39.6% were male. At baseline assessment, 27.2% of patients had compensated cirrhosis and 2.9% had decompensated cirrhosis. Genotype 6 was predominant (53.0%). Among patients analysed according to modified intention to treat (n = 8525), treatment effectiveness was high, with 97.2% of patients achieving SVR12. Occurrence of SAE was low (0.7%). Treatment effectiveness and safety was not affected by the iterative simplification to treatment modality. In conclusion, in this large treatment cohort in Phnom Penh, Cambodia, the SOF + DCV regimen showed high rates of treatment effectiveness and safety across patient sub-groups and during progressive simplification.
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Affiliation(s)
- Meiwen Zhang
- Médecins Sans Frontières-France, Phnom Penh, Cambodia.,Epicentre, Paris, France
| | - Daniel O'Keefe
- Médecins Sans Frontières-France, Phnom Penh, Cambodia.,Burnet Institute, Melbourne, Australia
| | - Momoko Iwamoto
- Médecins Sans Frontières-France, Phnom Penh, Cambodia.,Epicentre, Paris, France
| | | | - Antharo Kien
- Médecins Sans Frontières-France, Phnom Penh, Cambodia
| | | | | | | | - Sovann Ly
- Department of Communicable Disease Control, Ministry of Health, Phnom Penh, Cambodia
| | - Dimanche Chhit
- Hepato-Gastro Department of Cambodia-China Friendship Preah Kossamak Hospital, Phnom Penh, Cambodia
| | - Suna Balkan
- Médecins Sans Frontières-France, Phnom Penh, Cambodia
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The p7 viroporin of the hepatitis C virus contributes to liver inflammation by stimulating production of Interleukin-1β. Biochim Biophys Acta Mol Basis Dis 2017; 1863:712-720. [DOI: 10.1016/j.bbadis.2016.12.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 12/08/2016] [Accepted: 12/12/2016] [Indexed: 12/12/2022]
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11
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Hakim S, Kazmi S, Bagasra O. Seroprevalence of Hepatitis B and C Genotypes Among Young Apparently Healthy Females of Karachi-Pakistan. Libyan J Med 2016. [DOI: 10.3402/ljm.v3i2.4760] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- S.T. Hakim
- Department of Microbiology, Jinnah University for Women, Karachi
- I.I.D.R. Lab, University of Karachi, Karachi, Pakistan
- South Carolina Center for Biotechnology, Claflin University, South Carolina, USA
| | - S.U. Kazmi
- I.I.D.R. Lab, University of Karachi, Karachi, Pakistan
| | - O. Bagasra
- South Carolina Center for Biotechnology, Claflin University, South Carolina, USA
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12
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Genotype distribution of hepatitis C virus among Lebanese patients: Results from a major tertiary care center. GENE REPORTS 2016. [DOI: 10.1016/j.genrep.2016.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Zhang ZL, Duan ZJ. Gut-liver axis: An important target for prevention and treatment of liver diseases. Shijie Huaren Xiaohua Zazhi 2016; 24:3454-3460. [DOI: 10.11569/wcjd.v24.i23.3454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The human intestine harbors a complex and diverse community of microbes that promote metabolism and digestion in their symbiotic relationship with the host. Liver diseases have long been associated with qualitative (dysbiotic) and quantitative (overgrowth) changes in the intestinal microbiota. Extrinsic factors, such as diet and alcohol, contribute to intestinal microbiota dysbiosis. Dysbiosis results in intestinal inflammation, intestinal barrier breakdown, and translocation of microbial products in animal models, further aggravating hepatic injury and inflammation. Microbial metabolites produced in a dysbiotic intestinal environment and host factors are equally important in the pathogenesis of liver diseases. In the current review, we discuss the progress in understanding the role of gut-liver axis dysfunction in the progression of non-alcoholic fatty liver disease, alcoholic liver disease and cirrhosis, and the potential application value of the restoration of intestinal homeostasis in the prevention and treatment of liver diseases.
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Husic-Selimovic A, Sofic A, Huskic J, Bulja D. Effect of Antiviral Therapy on Serum Activity of Angiotensin Converting Enzyme in Patients with Chronic Hepatitis C. Med Arch 2016; 70:92-6. [PMID: 27147779 PMCID: PMC4851539 DOI: 10.5455/medarh.2016.70.92-96] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 03/15/2016] [Indexed: 12/15/2022] Open
Abstract
Introduction: Renin-angiotenzin system (RAS) is frequently activated in patients with chronic liver disease. Angiotenzin - II (AT-II), produced by angiotenzin converting enzyme (ACE), has many physiological effects, including an important role in liver fibrogenesis. Combined antiviral therapy with PEG-IFN and ribavirin besides its antiviral effect also leads to a reduction in liver parenchyma fibrosis. Aim of the study: Determining the value of ACE in serum of patients with chronic hepatitis C before and after combined antiviral therapy, as well as the value of ACE activities in sera of the control group. Materials and methods: We studied 50 patients treated at Gastroenterohepatology Department, in the time-period of four years. Value of ACE in serum was determined by Olympus AU 400 device, with application of kit “Infinity TN ACE Liquid Stable Reagent”. HCV RNA levels in sera were measured by real time PCR. HCV RNA test was performed with modular analysis of AMPLICOR and COBAS AMPLICOR HCV MONITOR test v2.0, which has proved infection and was used for quantification of the viruses and monitoring of the patients’ response to therapy. Liver histology was evaluated in accordance with the level of necroinflammation activity and stage of fibrosis. Results: Serum activities of ACE in chronic hepatitis C patients is statistically higher than the values in the control group (p=0.02). Antiviral therapy in chronic hepatitis C patients statistically decreases serum activities of ACE (p= 0.02) and indirectly affects fibrogenesis of the liver parenchyma. Correlation between ACE and ALT activity after the therapy was proved (0.3934). Conclusion: Our findings suggest that the activity of ACE in serum is a good indirect parameter of the liver damage, and could be used as an indirect prognostic factor of the level of liver parenchyma damage. Serum activity of ACE can be used as a parameter for non-invasive assessment of intensity of liver damage.
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Affiliation(s)
- Azra Husic-Selimovic
- Institute of Gastroenterohepatology, University Clinical Center Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Amela Sofic
- Clinic of Radiology, University Clinical Center Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Jasminko Huskic
- Institute for Physiology, Medical Faculty Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Deniz Bulja
- Clinic of Radiology, University Clinical Center Sarajevo, Sarajevo, Bosnia and Herzegovina
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15
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Serum level of interleukin-8 and interleukin-10 as predictors for response to interferon–ribavirin combined therapy. EGYPTIAN LIVER JOURNAL 2016. [DOI: 10.1097/01.elx.0000481902.94221.61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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16
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Martín-Vílchez S, Rodríguez-Muñoz Y, López-Rodríguez R, Hernández-Bartolomé Á, Borque-Iñurrita MJ, Molina-Jiménez F, García-Buey L, Moreno-Otero R, Sanz-Cameno P. Inhibition of tyrosine kinase receptor Tie2 reverts HCV-induced hepatic stellate cell activation. PLoS One 2014; 9:e106958. [PMID: 25302785 PMCID: PMC4193738 DOI: 10.1371/journal.pone.0106958] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 08/12/2014] [Indexed: 01/18/2023] Open
Abstract
Background Hepatitis C virus (HCV) infection is a major cause of chronic liver disease (CLD) and is frequently linked to intrahepatic microvascular disorders. Activation of hepatic stellate cells (HSC) is a central event in liver damage, due to their contribution to hepatic renewal and to the development of fibrosis and hepatocarcinoma. During the progression of CLDs, HSC attempt to restore injured tissue by stimulating repair processes, such as fibrosis and angiogenesis. Because HSC express the key vascular receptor Tie2, among other angiogenic receptors and mediators, we analyzed its involvement in the development of CLD. Methods Tie2 expression was monitored in HSC cultures that were exposed to media from HCV-expressing cells (replicons). The effects of Tie2 blockade on HSC activation by either neutralizing antibody or specific signaling inhibitors were also examined. Results Media from HCV-replicons enhanced HSC activation and invasion and upregulated Tie2 expression. Notably, the blockade of Tie2 receptor (by a specific neutralizing antibody) or signaling (by selective AKT and MAPK inhibitors) significantly reduced alpha-smooth muscle actin (α-SMA) expression and the invasive potential of HCV-conditioned HSC. Conclusions These findings ascribe a novel profibrogenic function to Tie2 receptor in the progression of chronic hepatitis C, highlighting the significance of its dysregulation in the evolution of CLDs and its potential as a novel therapeutic target.
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Affiliation(s)
- Samuel Martín-Vílchez
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia, United States of America
| | - Yolanda Rodríguez-Muñoz
- Unidad de Hepatología, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBER-ehd), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Rosario López-Rodríguez
- Unidad de Hepatología, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBER-ehd), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Ángel Hernández-Bartolomé
- Unidad de Hepatología, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - María Jesús Borque-Iñurrita
- Unidad de Biología Molecular, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - Francisca Molina-Jiménez
- Unidad de Biología Molecular, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - Luisa García-Buey
- Unidad de Hepatología, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBER-ehd), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Ricardo Moreno-Otero
- Unidad de Hepatología, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBER-ehd), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Paloma Sanz-Cameno
- Unidad de Hepatología, Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBER-ehd), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
- * E-mail:
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17
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Petruzziello A, Coppola N, Loquercio G, Marigliano S, Giordano M, Azzaro R, Diodato AM, Iervolino V, Di Costanzo G, Di Macchia CA, Di Meo T, Paradiso L, Ferro R, Giuliano P, Russo F, Pasquale G, Cacciapuoti C. Distribution pattern of hepatitis C virus genotypes and correlation with viral load and risk factors in chronic positive patients. Intervirology 2014; 57:311-8. [PMID: 25170801 DOI: 10.1159/000363386] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 05/02/2014] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Hepatitis C virus (HCV) has emerged as a leading cause of chronic hepatitis, liver cirrhosis and hepatocellular carcinoma worldwide. The purpose of this study was to describe the distribution pattern of HCV genotypes in chronic hepatitis patients in the Campania region of southern Italy and estimate their association with risk factors and viral load. MATERIALS AND METHODS 404 consecutive HCV ribonucleic acid-positive patients were included in the study. HCV genotyping was carried out by the HCV line probe assay test and viral load estimation by the TaqMan real-time PCR system. RESULTS The predominant genotype was 1 (63.6%), followed by genotype 2 (29.4%), 3 (6.2%) and 4 (0.8%). Subtype 1b was more frequent in females than in males. Conversely, genotype 3 was more frequent in males. No significant difference was observed in age distribution of HCV genotypes. Surgery and dental therapy were the most frequent risk factors for genotype 1 and intravenous drug abuse and tattooing for genotype 3. Patients with genotype 1 more frequently showed high HCV viral load when compared to those with genotypes 2 and 3. CONCLUSION The present study revealed that HCV genotypes 1 and 2 accounted for over 95% of all HCV infections in the Campania region, and genotype 1 was more frequently associated with a higher viral load when compared to genotypes 2 and 3.
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Affiliation(s)
- Arnolfo Petruzziello
- Laboratory of Virology and Molecular Biology 'V. Tridente', Transfusion Service, Department of Haemathology, Istituto Nazionale Tumori - Fondazione 'G. Pascale', IRCCS Italia, Naples, Italy
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18
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Schnabl B, Brenner DA. Interactions between the intestinal microbiome and liver diseases. Gastroenterology 2014; 146:1513-24. [PMID: 24440671 PMCID: PMC3996054 DOI: 10.1053/j.gastro.2014.01.020] [Citation(s) in RCA: 677] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 12/29/2013] [Accepted: 01/07/2014] [Indexed: 02/08/2023]
Abstract
The human intestine harbors a diverse community of microbes that promote metabolism and digestion in their symbiotic relationship with the host. Disturbance of its homeostasis can result in disease. We review factors that disrupt intestinal homeostasis and contribute to nonalcoholic fatty liver disease, steatohepatitis, alcoholic liver disease, and cirrhosis. Liver disease has long been associated with qualitative and quantitative (overgrowth) dysbiotic changes in the intestinal microbiota. Extrinsic factors, such as the Western diet and alcohol, contribute to these changes. Dysbiosis results in intestinal inflammation, a breakdown of the intestinal barrier, and translocation of microbial products in animal models. However, the contribution of the intestinal microbiome to liver disease goes beyond simple translocation of bacterial products that promote hepatic injury and inflammation. Microbial metabolites produced in a dysbiotic intestinal environment and host factors are equally important in the pathogenesis of liver disease. We review how the combination of liver insult and disruptions in intestinal homeostasis contribute to liver disease.
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Affiliation(s)
- Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, California.
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19
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Clinical Aspects of Hepatitis C Virus Infection. Antiviral Res 2014. [DOI: 10.1128/9781555815493.ch14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Monitoring coagulation proteins during progression of liver disease. Indian J Clin Biochem 2014; 30:210-6. [PMID: 25883431 DOI: 10.1007/s12291-014-0429-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 03/13/2014] [Indexed: 12/29/2022]
Abstract
This work was designated to monitor the coagulation abnormalities associated with the gradual progression of liver diseases. The study included fifty patients; forty were diagnosed with liver cirrhosis with different stages categorized according to the Childs-Pugh classification and another ten patients were diagnosed with hepatocellular carcinoma (HCC). Haemostatic variables including fibrinogen (FI), calcium (FIV), transglutaminase (FXIII), prothrombin time (PT) and platelet count were estimated in patients and compared with the baseline levels of healthy subjects (n = 10). The results demonstrated that the fibrinogen level was progressively decreased, whereas PT was progressively prolonged in Child A, Child B and Child C groups. The maximum deterioration was observed in HCC patients. Calcium significantly increased in mild (Child A) and moderate (Child B) but not in Child C cirrhosis and HCC patients. FXIII level did not show any significant changes in cirrhotic patients compared to healthy group. Some of the haemostatic variables we investigated were correlated with serum albumin and bilirubin but not with aminotransferases (ALT and AST). The results indicated that the haemostatic abnormalities in fibrinogen, calcium and PT (but not FXIII) were deteriorated in parallel with the gradual regression of the constitutional function of liver.
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21
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Romero Gutiérrez M, del Campo Terrón S, Moreno Zamora A, Sánchez Ruano JJ, Artaza Varasa T, Bárcena Marugán R. Does low-dose prolonged steroid therapy affect the natural history of chronic hepatitis C? J Med Virol 2014; 86:758-64. [DOI: 10.1002/jmv.23889] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2014] [Indexed: 01/05/2023]
Affiliation(s)
| | | | - Ana Moreno Zamora
- Infectious Diseases Service Hospital Universitario Ramón y Cajal; Madrid Spain
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22
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Coats SJ, Garnier-Amblard EC, Amblard F, Ehteshami M, Amiralaei S, Zhang H, Zhou L, Boucle SRL, Lu X, Bondada L, Shelton JR, Li H, Liu P, Li C, Cho JH, Chavre SN, Zhou S, Mathew J, Schinazi RF. Chutes and ladders in hepatitis C nucleoside drug development. Antiviral Res 2013; 102:119-47. [PMID: 24275341 DOI: 10.1016/j.antiviral.2013.11.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 11/08/2013] [Accepted: 11/12/2013] [Indexed: 02/07/2023]
Abstract
Chutes and Ladders is an exciting up-and-down-again game in which players race to be the first to the top of the board. Along the way, they will find ladders to help them advance, and chutes that will cause them to move backwards. The development of nucleoside analogs for clinical treatment of hepatitis C presents a similar scenario in which taking shortcuts may help quickly advance a program, but there is always a tremendous risk of being sent backwards as one competes for the finish line. In recent years the treatment options for chronic hepatitis C virus (HCV) infection have expand due to the development of a replicon based in vitro evaluation system, allowing for the identification of multiple drugable viral targets along with a concerted and substantial drug discovery effort. Three major drug targets have reached clinical study for chronic HCV infection: the NS3/4A serine protease, the large phosphoprotein NS5A, and the NS5B RNA-dependent RNA polymerase. Recently, two oral HCV protease inhibitors were approved by the FDA and were the first direct acting anti-HCV agents to result from the substantial research in this area. There are currently many new chemical entities from several different target classes that are being evaluated worldwide in clinical trials for their effectiveness at achieving a sustained virologic response (SVR) (Pham et al., 2004; Radkowski et al., 2005). Clearly the goal is to develop therapies leading to a cure that are safe, widely accessible and available, and effective against all HCV genotypes (GT), and all stages of the disease. Nucleoside analogs that target the HCV NS5B polymerase that have reached human clinical trials is the focus of this review as they have demonstrated significant advantages in the clinic with broader activity against the various HCV GT and a higher barrier to the development of resistant viruses when compared to all other classes of HCV inhibitors.
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Affiliation(s)
- Steven J Coats
- RFS Pharma, LLC, 1860 Montreal Road, Tucker, GA 30084, USA
| | | | - Franck Amblard
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Maryam Ehteshami
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Sheida Amiralaei
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Hongwang Zhang
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Longhu Zhou
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Sebastien R L Boucle
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Xiao Lu
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Lavanya Bondada
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Jadd R Shelton
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Hao Li
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Peng Liu
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Chengwei Li
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Jong Hyun Cho
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Satish N Chavre
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Shaoman Zhou
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - Judy Mathew
- RFS Pharma, LLC, 1860 Montreal Road, Tucker, GA 30084, USA
| | - Raymond F Schinazi
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Veterans Affairs Medical Center, Decatur, GA 30033, USA.
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23
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Binder M, Sulaimanov N, Clausznitzer D, Schulze M, Hüber CM, Lenz SM, Schlöder JP, Trippler M, Bartenschlager R, Lohmann V, Kaderali L. Replication vesicles are load- and choke-points in the hepatitis C virus lifecycle. PLoS Pathog 2013; 9:e1003561. [PMID: 23990783 PMCID: PMC3749965 DOI: 10.1371/journal.ppat.1003561] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 07/02/2013] [Indexed: 02/07/2023] Open
Abstract
Hepatitis C virus (HCV) infection develops into chronicity in 80% of all patients, characterized by persistent low-level replication. To understand how the virus establishes its tightly controlled intracellular RNA replication cycle, we developed the first detailed mathematical model of the initial dynamic phase of the intracellular HCV RNA replication. We therefore quantitatively measured viral RNA and protein translation upon synchronous delivery of viral genomes to host cells, and thoroughly validated the model using additional, independent experiments. Model analysis was used to predict the efficacy of different classes of inhibitors and identified sensitive substeps of replication that could be targeted by current and future therapeutics. A protective replication compartment proved to be essential for sustained RNA replication, balancing translation versus replication and thus effectively limiting RNA amplification. The model predicts that host factors involved in the formation of this compartment determine cellular permissiveness to HCV replication. In gene expression profiling, we identified several key processes potentially determining cellular HCV replication efficiency. Hepatitis C is a severe disease and a prime cause for liver transplantation. Up to 3% of the world's population are chronically infected with its causative agent, the Hepatitis C virus (HCV). This capacity to establish long (decades) lasting persistent infection sets HCV apart from other plus-strand RNA viruses typically causing acute, self-limiting infections. A prerequisite for its capacity to persist is HCV's complex and tightly regulated intracellular replication strategy. In this study, we therefore wanted to develop a comprehensive understanding of the molecular processes governing HCV RNA replication in order to pinpoint the most vulnerable substeps in the viral life cycle. For that purpose, we used a combination of biological experiments and mathematical modeling. Using the model to study HCV's replication strategy, we recognized diverse but crucial roles for the membraneous replication compartment of HCV in regulating RNA amplification. We further predict the existence of an essential limiting host factor (or function) required for establishing active RNA replication and thereby determining cellular permissiveness for HCV. Our model also proved valuable to understand and predict the effects of pharmacological inhibitors of HCV and might be a solid basis for the development of similar models for other plus-strand RNA viruses.
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Affiliation(s)
- Marco Binder
- Heidelberg University, Medical Faculty, Department of Infectious Diseases, Molecular Virology, Heidelberg, Germany
| | - Nurgazy Sulaimanov
- Technische Universität Dresden, Institute for Medical Informatics and Biometry, Dresden, Germany
- Heidelberg University, ViroQuant Research Group Modeling, BioQuant BQ26, Heidelberg, Germany
| | - Diana Clausznitzer
- Technische Universität Dresden, Institute for Medical Informatics and Biometry, Dresden, Germany
| | - Manuel Schulze
- Technische Universität Dresden, Institute for Medical Informatics and Biometry, Dresden, Germany
| | - Christian M. Hüber
- Heidelberg University, Medical Faculty, Department of Infectious Diseases, Molecular Virology, Heidelberg, Germany
| | - Simon M. Lenz
- Heidelberg University, Interdisciplinary Center for Scientific Computing (IWR), Simulation and Optimization Group, Heidelberg, Germany
| | - Johannes P. Schlöder
- Heidelberg University, Interdisciplinary Center for Scientific Computing (IWR), Simulation and Optimization Group, Heidelberg, Germany
| | - Martin Trippler
- University Hospital of Essen, Department of Gastroenterology and Hepatology, Essen, Germany
| | - Ralf Bartenschlager
- Heidelberg University, Medical Faculty, Department of Infectious Diseases, Molecular Virology, Heidelberg, Germany
| | - Volker Lohmann
- Heidelberg University, Medical Faculty, Department of Infectious Diseases, Molecular Virology, Heidelberg, Germany
| | - Lars Kaderali
- Technische Universität Dresden, Institute for Medical Informatics and Biometry, Dresden, Germany
- Heidelberg University, ViroQuant Research Group Modeling, BioQuant BQ26, Heidelberg, Germany
- * E-mail:
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24
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Dessein A, Arnaud V, He H, Li J, Dessein H, Hou X, Luo X, Li Y. Genetic analysis of human predisposition to hepatosplenic disease caused by schistosomes reveals the crucial role of connective tissue growth factor in rapid progression to severe hepatic fibrosis. ACTA ACUST UNITED AC 2013; 61:3-10. [PMID: 23414795 DOI: 10.1016/j.patbio.2013.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Schistosome worms inhabit mammalian mesenteric veins. Their eggs cause chronic inflammation, which progresses to periportal fibrosis in 5 to 30% of cases, increasing portal blood pressure and leading to esophageal varices. Episodes of bleeding cause hepatic necrosis and may ultimately lead to hepatic failure and the death of the patient. Schistosome infections can also cause pulmonary hypertension and heart failure. The mechanisms of fibrogenesis and fibrolysis are beginning to be unraveled, but it remains unclear why disease occurs only in certain subjects, as also observed for other types of chronic liver inflammation, as in hepatitis C or B. We summarize here the results that showed that fibrosis progression is determined by a genetic locus on chromosome 6. The CCN2 gene at this locus, encodes CTGF that is a crucial regulator of fibrosis. Two groups of CCN2 polymorphisms independently modulate the progression of hepatic fibrosis. These results were obtained in an Asian population, but were extended to humans living in Africa and South America and are presently tested in liver fibrosis of other etiological origins.
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Affiliation(s)
- A Dessein
- INSERM, U906, faculté de médecine Timone, 27, boulevard Jean-Moulin, 13385 Marseille cedex 5, France.
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25
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Flohr TR, Bonatti H, Hranjec T, Keith DS, Lobo PI, Kumer SC, Schmitt TM, Sawyer RG, Pruett TL, Roberts JP, Brayman KL. Elderly recipients of hepatitis C positive renal allografts can quickly develop liver disease. J Surg Res 2012; 176:629-38. [PMID: 22316669 PMCID: PMC3401245 DOI: 10.1016/j.jss.2011.10.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/17/2011] [Accepted: 10/24/2011] [Indexed: 02/08/2023]
Abstract
Our institution explored using allografts from donors with Hepatitis C virus (HCV) for elderly renal transplantation (RT). Thirteen HCV- elderly recipients were transplanted with HCV+ allografts (eD+/R-) between January 2003 and April 2009. Ninety HCV- elderly recipients of HCV- allografts (eD-/R-), eight HCV+ recipients of HCV+ allografts (D+/R+) and thirteen HCV+ recipients of HCV- allografts (D-/R+) were also transplanted. Median follow-up was 1.5 (range 0.8-5) years. Seven eD+/R- developed a positive HCV viral load and six had elevated liver transaminases with evidence of hepatitis on biopsy. Overall, eD+/R- survival was 46% while the eD-/R- survival was 85% (P = 0.003). Seven eD+/R- died during follow-up. Causes included multi-organ failure and sepsis (n = 4), cancer (n = 1), failure-to-thrive (n = 1) and surgical complications (n = 1). One eD+/R- died from causes directly related to HCV infection. In conclusion, multiple eD+/R- quickly developed HCV-related liver disease and infections were a frequent cause of morbidity and mortality.
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Affiliation(s)
- Tanya R Flohr
- Department of Surgery, University of Virginia Health System, Charlottesville, Virginia 22908-0709, USA.
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26
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Stachulski AV, Pidathala C, Row EC, Sharma R, Berry NG, Lawrenson AS, Moores SL, Iqbal M, Bentley J, Allman SA, Edwards G, Helm A, Hellier J, Korba BE, Semple JE, Rossignol JF. Thiazolides as novel antiviral agents. 2. Inhibition of hepatitis C virus replication. J Med Chem 2011; 54:8670-80. [PMID: 22059983 DOI: 10.1021/jm201264t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report the activities of a number of thiazolides [2-hydroxyaroyl-N-(thiazol-2-yl)amides] against hepatitis C virus (HCV) genotypes IA and IB, using replicon assays. The structure-activity relationships (SARs) of thiazolides against HCV are less predictable than against hepatitis B virus (HBV), though an electron-withdrawing group at C(5') generally correlates with potency. Among the related salicyloylanilides, the m-fluorophenyl analogue was most promising; niclosamide and close analogues suffered from very low solubility and bioavailability. Nitazoxanide (NTZ) 1 has performed well in clinical trials against HCV. We show here that the 5'-Cl analogue 4 has closely comparable in vitro activity and a good cell safety index. By use of support vector analysis, a quantitative structure-activity relationship (QSAR) model was obtained, showing good predictive models for cell safety. We conclude by updating the mode of action of the thiazolides and explain the candidate selection that has led to compound 4 entering preclinical development.
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Affiliation(s)
- Andrew V Stachulski
- Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK.
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27
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Ali A, Nisar M, Ahmad H, Saif N, Idrees M, Bajwa MA. Determination of HCV genotypes and viral loads in chronic HCV infected patients of Hazara Pakistan. Virol J 2011; 8:466. [PMID: 21982599 PMCID: PMC3198714 DOI: 10.1186/1743-422x-8-466] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 10/09/2011] [Indexed: 12/17/2022] Open
Abstract
Hepatitis C Virus (HCV) genotype and viral load are two significant predictive variables knowledge of which might persuade treatment decisions. The objective of the present study was to identify the distribution of different HCV genotypes circulating in the study area and to estimate viral load in chronically HCV infected patients. Out of total 305 HCV positive patients, 177 (58%) were males and 128 (42%) were females. Frequency breakup of the HCV positive patients was 169, 69, 38 and 29 from Abbottabad, Mansehra, Haripur and Battagram districts respectively. Out of the total 305 tested serum samples, 255 (83.06%) were successfully genotyped whereas 50 (16.4%) samples were found with unclassified genotypes. Among typable genotypes, 1a accounted for 21 (6.8%) 1b for 14 (4.6%), 2a for 4 (1.31%) 3a for 166 (54.42%) and genotype 3b for (8.19%). Twenty five (8.19%) patients were infected with mixed HCV genotypes. Viral load distribution was classified into three categories based on its viral load levels such as low (< 60, 0000 IU/mL), intermediate (60,0000-80,0000 IU/mL) and high (> 80,0000 IU/mL). The baseline HCV RNA Viral load in HCV genotype 3 infected patients was 50 (26.17%), 46 (24.08%) and 95 (49.73%) for low, intermediate and high categories respectively. For genotypes other than 3, these values for low, intermediate and high viral load categories were 50 (43.85), 35 (30.70) and 29 (25.43) respectively. Pre-treatment viral load in patients with untypable genotype was 19 (38.00%), 5 (20.00%) and 11 (44.00%) for low, intermediate and high viral load categories. Viral load distribution was also categorized sex wise; for males it was 58 (32.76%), 26 (14.68%) and 93 (52.54%) whereas for females it was 40 (31.25%), 34 (26.56%) and 54 (42.18%) for low, intermediate and high viral load respectively. In conclusion HCV genotype 3a is the most prevalent genotype circulating in Hazara Division like other parts of pakistan. Pre-treatment viral load is significantly high (p 0.014) in patients infected with HCV genotype 3 as compared to other genotypes.
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Affiliation(s)
- Amjad Ali
- 1Department of Biotechnology University of Malakand, Chakdara, Khyber Pakhtoonkhaw, Pakistan
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Mosca T, Guerra GM, Miorin LA, Malafronte P, dos Santos Sens YA, Forte WCN. Cryoglobulinemia in chronic hemodialysis patients. Ren Fail 2011; 33:801-4. [PMID: 21859249 DOI: 10.3109/0886022x.2011.601828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Renal failure patients submitted to chronic hemodialysis can present with cryoglobulinemia. There are few studies on cryoglobulins in chronic hemodialysis patients. The aim of the present study was to determine the prevalence and to identify the components of cryoglobulins in chronic hemodialysis patients. METHODS Fifty-four patients on chronic hemodialysis were evaluated for the presence of cryoglobulins, after inclusion and exclusion criteria. The components of the cryoprecipitate were analyzed. RESULTS Cryoglobulins were detected in 83% (45/54) of the patients on chronic hemodialysis. The cryoprecipitate was constituted by IgG, IgM, IgA, and complement fractions C3 and C4. CONCLUSION We concluded that there was a high prevalence of cryoglobulins in chronic hemodialysis patients, and the cryoprecipitate was constituted by IgG, IgM, IgA, and complement fractions C3 and C4.
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Affiliation(s)
- Tainá Mosca
- Santa Casa Medical School and Hospital, São Paulo, Brazil
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Butt S, Idrees M, Rehman IU, Ali L, Hussain A, Ali M, Ahmed N, Saleem S, Fayyaz M. Establishment of stable Huh-7 cell lines expressing various hepatitis C virus genotype 3a protein: an in-vitro testing system for novel anti-HCV drugs. GENETIC VACCINES AND THERAPY 2011; 9:12. [PMID: 21711509 PMCID: PMC3164222 DOI: 10.1186/1479-0556-9-12] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 06/28/2011] [Indexed: 02/08/2023]
Abstract
Background Hepatitis C virus (HCV) infection is the leading cause of chronic hepatitis which progresses to hepatocellular carcinoma (HCC) afflicting > 170 million people worldwide. HCV 3a is the most common genotype (about 70% of all genotypes) circulating in Pakistan. Expression of HCV individual gene of 3a would facilitate therapeutic and vaccines strategies against chronic HCV and liver Cirrhosis. The aim of the present study was the establishment of stable Huh-7 cell lines expressing structural and non structural proteins of HCV Genotype 3a Pakistani isolate obtained from chronic HCV patients. Methods Blood samples were obtained from chronic HCV-3a positive patients. HCV individual genes were amplified using PCR with gene specific primers having restriction sites. These gene amplicons were cloned in mammalian expression vector PcDNA3.1+. Huh-7 cell lines were transfected with these constructed plasmids having structural or non-structural HCV genes in confluent cells with lipofectamine. Positive clones were selected with G418 and then confirmed by genome PCR. Subsequently, transcription and expression of the integrated genes were demonstrated by RT-PCR, sequencing and Western blot analysis. Results We successfully cloned and express five HCV-3a genes in PcDNA3.1+ mammalian expression vector. Results of western blot and sequencing PCR confirmed the stable expression of these five genes. Conclusion The stable cell-lines expressing HCV-3a individual genes would be a useful tool to investigate the role of various HCV proteins on HCV disease outcome and testing of new therapeutic strategies against HCV.
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Affiliation(s)
- Sadia Butt
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Muhammad Idrees
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Irshad-Ur Rehman
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Liaqat Ali
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Abrar Hussain
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Muhammad Ali
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Naveed Ahmed
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Sana Saleem
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
| | - Madiha Fayyaz
- Molecular Virology Laboratory, National Centre of Excellence in Molecular Biology, 87-West Canal Bank Road ,Thokar Niaz Baig, Lahore-53700, University of the Punjab, Lahore, Pakistan
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Bobeck DR, Schinazi RF, Coats SJ. Advances in nucleoside monophosphate prodrugs as anti-HCV agents. Antivir Ther 2011; 15:935-50. [PMID: 21041908 DOI: 10.3851/imp1667] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nucleoside monophosphate prodrugs that are eventually bioconverted to the active nucleoside triphosphate (NTP) offer the potential to deliver increased intracellular NTP levels and/or organ-specific NTP enhancement. There are several classes of monophosphate prodrugs that have been applied to HCV drug discovery, and some of these approaches are currently being evaluated in humans. This review discusses recent advances in monophosphate prodrug approaches to improve oral absorption, stability and pharmacokinetic profile, including their advantages and potential pitfalls.
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Rehman IU, Idrees M, Ali M, Ali L, Butt S, Hussain A, Akbar H, Afzal S. Hepatitis C virus genotype 3a with phylogenetically distinct origin is circulating in Pakistan. GENETIC VACCINES AND THERAPY 2011; 9:2. [PMID: 21211024 PMCID: PMC3023652 DOI: 10.1186/1479-0556-9-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2010] [Accepted: 01/06/2011] [Indexed: 02/07/2023]
Abstract
BACKGROUND Hepatitis C virus (HCV) is one of the leading causes of viral hepatitis worldwide and its genotype 3a is predominant in vast areas of Pakistan. FINDINGS The present study reports the first full sequence of HCV 3a isolate PK-1 from Pakistan. This nucleotide sequence was compared with six other HCV genotype 3a full length sequences from different regions of the world by using statistical methods of phylogenetic analysis. CONCLUSION The nucleotide difference of these seven sequences shows that HCV genotype 3a of phylogenetically distinct origin is circulating in Pakistan.
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Affiliation(s)
- Irshad-Ur Rehman
- Division of Molecular Virology, National Centre of Excellence in Molecular Biology, University of the Punjab, 87-West Canal Bank Road Thokar Niaz Baig Lahore-53700, Pakistan.
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Hepatitis C virus treatment rates and outcomes in HIV/hepatitis C virus co-infected individuals at an urban HIV clinic. Eur J Gastroenterol Hepatol 2011; 23:45-50. [PMID: 21139470 DOI: 10.1097/meg.0b013e328341ef54] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVES The factors associated with hepatitis C virus (HCV) treatment uptake and responses were assessed among HCV/HIV co-infected individuals referred for HCV therapy at an urban HIV clinic. METHODS Retrospective review of HIV/HCV patients enrolled in the HCV treatment program at the John Ruedy Immunodeficiency Clinic in Vancouver. The factors associated with treatment uptake were assessed using multivariate analysis. RESULTS A total of 134 HCV/HIV co-infected individuals were recalled for assessment for HCV therapy. Overall 64 (48%) initiated treatment, and of those treated 49 (76.6%) attained end treatment response, whereas 35 (57.8%) achieved sustained virological response (SVR). When evaluated by genotype, 53% (17/32) of those with genotype 1, and 65% (20/31) of those with genotype 2 or 3 infections attained SVR. In treated individuals, alanine aminotransferase dropped significantly after treatment (P<0.001). During treatment, CD4 counts dropped significantly (P<0.001) in all patients. The counts recovered to baseline in patients who achieved SVR, but remained lower in patients who failed the therapy (P=0.015). On multivariate analysis, history of injection drug use (odds ratio: 3.48; 95% confidence interval: 1.37-8.79; P=0.009) and low hemoglobin levels (odds ratio: 4.23; 95% confidence interval: 1.36-13.10; P=0.013) were associated with those who did not enter the treatment. CONCLUSION Only half of treatment-eligible co-infected patients referred for the therapy initiated treatment. Of those referred for the therapy, history of injection drug use was associated with lower rates of treatment uptake. Treated HIV/HCV co-infected individuals benefitted from both decreased alanine aminotransferase (independent of SVR), and rates of SVR similar to those described in HCV monoinfected patients.
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Sanyal AJ. Role of insulin resistance and hepatic steatosis in the progression of fibrosis and response to treatment in hepatitis C. Liver Int 2011; 31 Suppl 1:23-8. [PMID: 21205134 DOI: 10.1111/j.1478-3231.2010.02397.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Hepatitis C is a common cause of chronic viral infection of the liver. It is associated with insulin resistance and the development of type 2 diabetes mellitus. It is also associated with the development of hepatic steatosis. The presence of hepatic steatosis is associated with an increased risk of having hepatic fibrosis. This is also associated with the severity of insulin resistance. These findings are specifically germane for those with genotype1 infection. Genotype 3 infection independently causes steatosis and successful treatment of the virus is followed by resolution of steatosis. In genotype 1 infection, the presence of hepatic steatosis is also a risk factor for failure to respond to pegylated interferon and ribavirin therapy. Unfortunately efforts to treat insulin resistance prior to antiviral therapy have not been very successful. Newer efforts focused on the role of specific micro RNAs in mediating the metabolic effects of hepatitis C virus infection may provide to ameliorate the metabolic risks of HCV infection.
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Affiliation(s)
- Arun J Sanyal
- Department of Internal Medicine, Division of Gastroenterology, Hepatology and Nutrition, Virginia Commonwealth University Medical Center, Richmond, VA 23298-0341, USA.
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Sabahi A, Marsh KA, Dahari H, Corcoran P, Lamora JM, Yu X, Garry RF, Uprichard SL. The rate of hepatitis C virus infection initiation in vitro is directly related to particle density. Virology 2010; 407:110-9. [PMID: 20800257 PMCID: PMC2946418 DOI: 10.1016/j.virol.2010.07.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Revised: 06/10/2010] [Accepted: 07/18/2010] [Indexed: 02/06/2023]
Abstract
To gain a more complete understanding of hepatitis C virus (HCV) entry, we initially assessed the rate at which HCV initiates productive attachment/infection in vitro and discovered it to be slower than most viruses. Since HCV, including cell culture-derived HCV (HCVcc), exhibits a broad-density profile (1.01-1.16 g/ml), we hypothesized that the varying densities of the HCVcc particles present in the inoculum may be responsible for this prolonged entry phenotype. To test this hypothesis, we show that during infection, particles of high density disappeared from the viral inoculum sooner and initiated productive infection faster than virions of low density. Moreover, we could alter the rate of attachment/infection initiation by increasing or decreasing the density of the cell culture medium. Together, these findings demonstrate that the relationship between the density of HCVcc and the density of the extracellular milieu can significantly impact the rate at which HCVcc productively interacts with target cells in vitro.
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Affiliation(s)
- Ali Sabahi
- Department of Microbiology and Immunology, Tulane University Health Sciences Center, New Orleans, LA, USA
| | - Katherine A. Marsh
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, USA
| | - Harel Dahari
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Peter Corcoran
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jennifer M. Lamora
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, USA
| | - Xuemei Yu
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Robert F. Garry
- Department of Microbiology and Immunology, Tulane University Health Sciences Center, New Orleans, LA, USA
| | - Susan L. Uprichard
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL, USA
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Zhang N, Liu Z, Han Q, Chen J, Lou S, Qiu J, Zhang G. Inhibition of bovine viral diarrhea virus in vitro by xanthohumol: Comparisons with ribavirin and interferon-α and implications for the development of anti-hepatitis C virus agents. Eur J Pharm Sci 2009; 38:332-40. [DOI: 10.1016/j.ejps.2009.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2009] [Revised: 07/05/2009] [Accepted: 08/21/2009] [Indexed: 11/16/2022]
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Idrees M, Rafique S, Rehman IU, Akbar H, Yousaf MZ, Butt S, Awan Z, Manzoor S, Akram M, Aftab M, Khubaib B, Riazuddin S. Hepatitis C virus genotype 3a infection and hepatocellular carcinoma: Pakistan experience. World J Gastroenterol 2009; 15:5080-5. [PMID: 19860002 PMCID: PMC2768888 DOI: 10.3748/wjg.15.5080] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To assess the association between chronic hepatitis C virus (HCV) infection and hepatocellular carcinoma (HCC) in Pakistan, and the genotype distribution among these HCC patients.
METHODS: One hundred and sixty-one subjects with HCC were included in this study. Liver biopsy was performed on 145 of the patients; sixteen were excluded because they failed to fulfill the inclusion criteria. Qualitative polymerase chain reaction (PCR) was performed for hepatitis B virus and HCV. Samples positive for HCV RNA were genotyped using genotype-specific PCR and confirmed by HCV 5’ noncoding region sequencing analysis.
RESULTS: Chronic HCV infection was identified a major risk factor (63.44% of tested HCC patients) for the development of HCC. The time from HCV infection to appearance of cancer was 10-50 years. In the HCC patient population, broader distributions of genotypes were present with genotype 3a as the predominant genotype. Using the type-specific genotyping method, we found HCV genotype 3a in 40.96%, 3b in 15.66%, 1a in 9.63%, and 1b in 2.40% of HCC tissue samples. About 28% of cases were found with mixed genotypes. Two cases were unable to be genotyped because of low viral load. Sixty-six percent of treated patients with cirrhosis had an end of treatment response, but unfortunately they relapsed quickly when the treatment was discontinued, and HCC developed during a median 3.8 years.
CONCLUSION: There was a strong association between chronic HCV infection and HCC in Pakistan, and between HCV genotype 3a and HCC.
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Mueller S, Millonig G, Seitz HK. Alcoholic liver disease and hepatitis C: A frequently underestimated combination. World J Gastroenterol 2009; 15:3462-71. [PMID: 19630099 PMCID: PMC2715970 DOI: 10.3748/wjg.15.3462] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Alcoholic liver disease (ALD) and hepatitis C virus (HCV) infection represent, either alone or in combination, more than two thirds of all patients with liver disease in the Western world. This review discusses the epidemiology and combined impact of ALD and HCV on the progression of liver disease. ALD and HCV affect the progression of liver disease to liver cirrhosis and hepatocellular carcinoma (HCC) in a synergistic manner. Thus, the risk for HCC increases five times with a daily alcohol consumption of 80 g; in the presence of HCV it is increased 20-fold, and a combination of both risk factors leads to a more than 100-fold risk for HCC development. Alcohol consumption also decreases the response to interferon treatment which is probably due to a lack of compliance than a direct effect on HCV replication. Several molecular mechanisms are discussed that could explain the synergistic interaction of alcohol and HCV on disease progression. They include modulation of the immune response and apoptosis, increased oxidative stress via induction of CYP2E1 and the hepatic accumulation of iron. Thus, both HCV and alcohol independently cause hepatic iron accumulation in > 50% of patients probably due to suppression of the liver-secreted systemic iron hormone hepcidin. A better understanding of hepcidin regulation could help in developing novel therapeutic approaches to treat the chronic disease in the future. For now, it can be generally concluded that HCV-infected patients should abstain from alcohol and alcoholics should be encouraged to participate in detoxification programs.
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Carvalho-Filho RJ, de Lucca Schiavon L, Narciso-Schiavon JL, Sampaio JP, Lanzoni VP, Gomes Ferraz ML, Benedito Silva AE. Clinical and histological impact of previous hepatitis B virus infection in patients with chronic hepatitis C. Liver Int 2009; 29:133-40. [PMID: 18507759 DOI: 10.1111/j.1478-3231.2008.01786.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
BACKGROUND Recent reports suggest that hepatitis C virus (HCV) carriers with serological markers of prior hepatitis B virus (HBV) infection have more advanced liver fibrosis, irrespective of HBV-DNA detection. AIMS We sought to assess the prevalence and impact of previous HBV infection in patients with HCV chronic infection. METHODS This cross-sectional study included hepatitis B surface antigen- and human immunodeficiency virus-negative subjects with positive HCV-RNA. All patients had prior parenteral exposure as the probable source of HCV infection. Serum samples were tested for HBV-DNA using a commercial assay. The METAVIR system was used for histological analysis. RESULTS One-hundred and eleven patients were evaluated. Thirty-one out of 111 patients (28%) tested positive for antihepatitis B core antigen (anti-HBc). HBV-DNA was not detected in any sample. Anti-HBc-positive patients showed higher histological grading, staging and a higher fibrosis progression rate. By multivariate analysis, anti-HBc-positivity was predictive of moderate to severe activity [odds ratio (OR)=3.532; P=0.032] and significant hepatic fibrosis (OR=3.364; P=0.017). After approximately 20 years of infection, advanced liver fibrosis (F3/F4) can be expected in 13% of anti-HBc-negative subjects who acquired HCV before the age of 30 and in 57% of those anti-HBc-positive patients who were infected by HCV after 30 years of age (P<0.001). CONCLUSION Previous HBV infection is common among HCV carriers and may exert a negative impact on the natural history of HCV infection, independently of the presence of significant HBV replication.
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Affiliation(s)
- Roberto J Carvalho-Filho
- Division of Gastroenterology, Hepatitis Section, Federal University of Sao Paulo, Sao Paulo, Brazil.
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Abstract
Chronic viral hepatitis is a prolonged inflammatory disease of the liver that may lead to the development of fibrosis, necro-inflammation and other associated pathological features. Because fibrosis and its end-point cirrhosis are the main causes of morbidity and mortality, fibrosis assessment is considered as the most relevant information for the evaluation of the severity of the disease and as a useful indicator for prognosis and treatment decision. Because fibrosis implies morphological damage, liver biopsy has come to be the natural gold standard for staging the disease. However, the high prevalence of chronic hepatitis C in addition to the cost and constraints generated by this procedure have triggered an intensive search for alternative methods for fibrosis evaluation. In this article, the strengths and weaknesses of liver biopsy and of non-invasive markers will be reviewed and their respective roles in management of patients with chronic hepatitis C will be discussed.
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Affiliation(s)
- Pierre Bedossa
- Department of Pathology, Beaujon Hospital, Assistance Publique-Hôpitaux de Paris, INSERM, Paris-Diderot University, Paris, France.
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Hakim S, Kazmi S, Bagasra O. Seroprevalence of hepatitis B and C genotypes among young apparently healthy females of karachi-pakistan. Libyan J Med 2008; 3:66-70. [PMID: 21499460 PMCID: PMC3074282 DOI: 10.4176/071123] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
INTRODUCTION Although the prevalence of hepatitis virus infections in Pakistan is still unknown, limited data indicate that the exposure rate to HBV is 35-38% with 4% being carriers and 32% having anti-HBV surface antibodies through natural conversion [1, 2, 3]. Studies in Pakistan have shown that the prevalence rate of HCV is 4.8-14% for, and that it is continuously increasing. Hence there is an urgent need to create awareness about the prevalence of both hepatitis B and C, and to develop preventive measures aimed at minimizing the prevalence of these diseases in the country. STUDY DESIGN Prospective, descriptive study. The study took place from March 2002 till October 2006 at two university campuses in Karachi. MATERIALS AND METHODS A total of 4000 healthy female students were screened for HBs Ag, anti-HBs antibodies and anti-HCV antibodies by rapid immunochromatography, ELISA and PCR. RESULTS A total of 3820 volunteers (95.5%) were negative by all three methods, 181 (4.5%) tested positive for HB surface antigen and 20 (0.5%) were positive for anti HB surface antibodies; 208 volunteers (5.2%) were positive for HCV. Double infection with HBV and HCV was found in only one patient (0.025%). Out of 180 HBs antigen positive samples 151 (83.89%) were genotype D, 28 (15.56%) showed mixed infection with genotypes B and D, and one patient (0.56%) showed mixed infection with genotypes C and D. Out of 208 samples positive for HCV antibodies, 107 (51.44%) were genotype 3a, 50 (24.04%) were mix of genotype 3a and 3b, 33 (15.87%) were genotype 3b, 10 (4.81%) were genotype 1b while, 8 (3.84%) samples could not be typed. CONCLUSION Although the presence of these pathogenic viruses was not very high in our young healthy female population, it is still a matter of concern to control the unregulated spread of these deadly infections by promoting increased awareness and regular immunization programs in the community. Local manufacturing of vaccines and related products may reduce these infections.
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Affiliation(s)
- St Hakim
- Department of Microbiology, Jinnah University for Women, Karachi
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Spano D, Cimmino F, Capasso M, D’Angelo F, Zambrano N, Terracciano L, Iolascon A. Changes of the Hepatic Proteome in Hepatitis B-Infected Mouse Model at Early Stages of Fibrosis. J Proteome Res 2008; 7:2642-53. [DOI: 10.1021/pr7006522] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Daniela Spano
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
| | - Flora Cimmino
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
| | - Mario Capasso
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
| | - Fulvio D’Angelo
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
| | - Nicola Zambrano
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
| | - Luigi Terracciano
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
| | - Achille Iolascon
- CEINGE Biotecnologie Avanzate, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy, Department of Pathology, University of Basel, Basel, Switzerland, and Dipartimento di Scienze per la Salute, Università del Molise, Campobasso, Italy
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In vivo, high-field, 3-Tesla 1H MR spectroscopic assessment of liver fibrosis in HCV-correlated chronic liver disease. Radiol Med 2008; 113:289-99. [PMID: 18386129 DOI: 10.1007/s11547-008-0239-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Accepted: 05/08/2007] [Indexed: 10/22/2022]
Abstract
PURPOSE Histology is the gold standard by which to diagnose and score hepatic fibrosis. Recently, it has been proposed that hepatic magnetic resonance spectroscopy (MRS) could provide an accurate representation of the disease process. The aim of this study was to correlate the in vivo high-field (3-Tesla) (1)H MRS features of noncirrhotic chronic hepatitis C patients stratified according to the histopathological stages of fibrosis. MATERIALS AND METHOD Six healthy controls and 23 patients with biopsy-proven precirrhotic hepatitic C virus (HCV)-related liver disease were included. The subdivision of patients into the histopathological stages of fibrosis was based on the Ishak fibrosis (F) scoring system: mild hepatitis (0< or =F< or =1), moderate (2< or =F< or =3) and severe hepatitis (4< or =F< or =5). For correlation analysis, the Spearman nonparametric test was used. Differences between groups were calculated with the nonparametric Mann-Whitney U test. A p value <0.05 was considered significant. The particular metabolite content was evaluated in relative units (RU), according to the pattern metabolite/H(2)O=area of the metabolite x1,000/area of nonsuppressed water. RESULT A significant statistical difference was observed between control vs. mild and moderate vs. severe disease severity in choline-containing compounds (CCC)/H(2)O ratios (p=0.0379 and p=0.0003) and in glutamine/glutamate (Glx)/H(2)O ratios (p=0.004 and p<0.0001), whereas a statistically significant difference in the lipid/H(2)O ratios was achieved only between control vs. moderate and between moderate vs. severe stages of disease (p=0.011 and p=0.0030). CONCLUSION High-field (1)H MRS successfully differentiates between mild/moderate vs. severe stages of chronic hepatitis and can be considered a complement to most standard imaging protocols in the liver.
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Bacchetti P, Tien PC, Seaberg EC, O'Brien TR, Augenbraun MH, Kral AH, Busch MP, Edlin BR. Estimating past hepatitis C infection risk from reported risk factor histories: implications for imputing age of infection and modeling fibrosis progression. BMC Infect Dis 2007; 7:145. [PMID: 18070362 PMCID: PMC2238758 DOI: 10.1186/1471-2334-7-145] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Accepted: 12/10/2007] [Indexed: 01/16/2023] Open
Abstract
Background Chronic hepatitis C virus infection is prevalent and often causes hepatic fibrosis, which can progress to cirrhosis and cause liver cancer or liver failure. Study of fibrosis progression often relies on imputing the time of infection, often as the reported age of first injection drug use. We sought to examine the accuracy of such imputation and implications for modeling factors that influence progression rates. Methods We analyzed cross-sectional data on hepatitis C antibody status and reported risk factor histories from two large studies, the Women's Interagency HIV Study and the Urban Health Study, using modern survival analysis methods for current status data to model past infection risk year by year. We compared fitted distributions of past infection risk to reported age of first injection drug use. Results Although injection drug use appeared to be a very strong risk factor, models for both studies showed that many subjects had considerable probability of having been infected substantially before or after their reported age of first injection drug use. Persons reporting younger age of first injection drug use were more likely to have been infected after, and persons reporting older age of first injection drug use were more likely to have been infected before. Conclusion In cross-sectional studies of fibrosis progression where date of HCV infection is estimated from risk factor histories, modern methods such as multiple imputation should be used to account for the substantial uncertainty about when infection occurred. The models presented here can provide the inputs needed by such methods. Using reported age of first injection drug use as the time of infection in studies of fibrosis progression is likely to produce a spuriously strong association of younger age of infection with slower rate of progression.
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Affiliation(s)
- Peter Bacchetti
- Box 0560, Department of Epidemiology and Biostatistics, University of California, San Francisco, CA 94143, USA.
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The mechanism of action of beta-D-2'-deoxy-2'-fluoro-2'-C-methylcytidine involves a second metabolic pathway leading to beta-D-2'-deoxy-2'-fluoro-2'-C-methyluridine 5'-triphosphate, a potent inhibitor of the hepatitis C virus RNA-dependent RNA polymerase. Antimicrob Agents Chemother 2007; 52:458-64. [PMID: 17999967 DOI: 10.1128/aac.01184-07] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
beta-D-2'-Deoxy-2'-fluoro-2'-C-methylcytidine (PSI-6130) is a potent inhibitor of hepatitis C virus (HCV) RNA replication in an HCV replicon assay. The 5'-triphosphate of PSI-6130 is a competitive inhibitor of the HCV RNA-dependent RNA polymerase (RdRp) and acts as a nonobligate chain terminator. Recently, it has been shown that the metabolism of PSI-6130 also results in the formation of the 5'-triphosphate of the uridine congener, beta-D-2'-deoxy-2'-fluoro-2'-C-methyluridine (PSI-6206; RO2433). Here we show that the formation of the 5'-triphosphate of RO2433 (RO2433-TP) requires the deamination of PSI-6130 monophosphate and that RO2433 monophosphate is subsequently phosphorylated to the corresponding di- and triphosphates by cellular UMP-CMP kinase and nucleoside diphosphate kinase, respectively. RO2433-TP is a potent inhibitor of the HCV RdRp; however, both enzymatic and cell-based assays show that PSI-6130 triphosphate is a more potent inhibitor of the HCV RdRp than RO2433-TP.
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Guo J, Yan R, Xu G, Li W, Zheng C. Construction of the Vero cell culture system that can produce infectious HCV particles. Mol Biol Rep 2007; 36:111-20. [PMID: 17960493 DOI: 10.1007/s11033-007-9158-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Accepted: 09/27/2007] [Indexed: 10/22/2022]
Abstract
The hepatitis C virus is a major cause of chronic liver disease worldwide. Lack of culture system supporting virus production has been one of the major impediments in HCV research and vaccine development. Here, we use a HCV (1b) full-length cDNA clone that replicates and produces integrated and infectious virus particles in cultured Vero cells. Evidence shows that the replication of virus particles is robust, producing over 10(8) copies of positive RNA per milliliter of the culture cells within 48 h. Sucrose density gradient centrifugation of the cell lysate reveals that the HCV virions have a density of about 1.17 g/ml and a spherical morphology with an average diameter of about 55 nm. Secreted virus is infectious for Huh7 cells and can be neutralized by CD81- and E2-specific antibodies. This system establishes a powerful framework for studying the virus life cycle and developing vaccine research.
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Affiliation(s)
- Jia Guo
- College of Life Sciences, Wuhan University, Luojia Mountain, Wuhan, 430072, China
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Rayhill SC, Wu YM, Katz DA, Voigt MD, Labrecque DR, Kirby PA, Mitros FA, Kalil RS, Miller RA, Stolpen AH, Schmidt WN. Older donor livers show early severe histological activity, fibrosis, and graft failure after liver transplantation for hepatitis C. Transplantation 2007; 84:331-9. [PMID: 17700157 DOI: 10.1097/01.tp.0000270313.31328.63] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND In hepatitis C virus (HCV)-positive liver transplant recipients, infection of the allograft and recurrent liver disease are important problems. Increased donor age has emerged as an important variable affecting patient and graft survival; however, specific age cutoffs and risk ratios for poor histologic outcomes and graft survival are not clear. METHODS A longitudinal database of all HCV-positive patients transplanted at our center during an 11-year period was used to identify 111 patients who received 124 liver transplants. Graft survival and histological endpoints (severe activity and fibrosis) of HCV infection in the allografts were compared as a function of donor age at transplantation. RESULTS By Kaplan-Meier analyses, older allografts showed earlier failure and decreased time to severe histological activity and fibrosis as compared with allografts from younger donors. By Cox proportional hazards analysis, older allografts were at greater risk for all severe histologic features and decreased graft survival as compared with younger allografts (P< or =0.02 for all outcomes). Analysis of donor age as a dichotomous variable showed that donors greater than 60 yr were at high risk for deleterious histologic outcomes and graft failure. An age cutoff of 60 yr showed a sensitivity of 94% and specificity of 67% for worse graft survival by receiver operating characteristics curve. CONCLUSIONS Advanced donor age is associated with more aggressive recurrent HCV and early allograft failure in HCV-positive liver transplant recipients. Consideration of donor age is important for decisions regarding patient selection, antiviral therapy, and organ allocation.
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Affiliation(s)
- Stephen C Rayhill
- Department of Surgery, Roy J. and Lucille A. Carver College of Medicine, University of Iowa and Veterans Administration Medical Center, Iowa City, IA, USA.
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Kayali Z, Tan S, Shinkunas L, Voigt M, LaBrecque DR, Stapleton JT, Brown KE, Schmidt WN. Risk factors for hepatitis C fibrosis: a prospective study of United States veterans compared with nonveterans. J Viral Hepat 2007; 14:11-21. [PMID: 17212639 DOI: 10.1111/j.1365-2893.2006.00764.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Chronic hepatitis C virus (HCV) infection causes cirrhosis in many infected patients; however, a better understanding of the risk factors for fibrosis progression in high HCV prevalence groups such as US veterans is needed. We wished to compare the demographic, clinical characteristics, and independent variables that influence fibrosis in US veterans vs nonveterans with chronic HCV. HCV-seropositive US veterans (n = 459) and nonveterans (n = 395) prospectively completed a detailed medical, social and occupational questionnaire. Clinical factors for progressive liver disease were compared between veterans and nonveterans and fibrosis stage assessed on liver biopsies (168 veterans and 208 nonveterans). Using polychotomous logistic regression, fibrosis was analysed as both a progressive and categorical outcome to determine independent risk factors for both patient groups. Although veterans were significantly older and had higher lifetime alcohol consumption than nonveterans, their median fibrosis scores did not differ from nonveterans. By univariate analysis, alanine aminotransferase, necroinflammatory activity (NIA), and cryoglobulin positivity were associated with fibrosis in veterans and nonveterans (P < 0.05, all comparisons), whereas steatosis was associated with fibrosis only in nonveterans (P < 0.0001). By multivariate analysis, NIA was an independent risk factor for fibrosis in both groups (P < 0.01). However, fibrosis in nonveterans was also independently associated with steatosis, significant alcohol consumption and age (P < 0.04, all comparisons). Independent risk factors for fibrosis vary among high HCV prevalence groups such as veterans when compared with nonveterans. Understanding specific patient cohort effects is important for determining independent risk factors for disease progression in chronic HCV infection.
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Affiliation(s)
- Z Kayali
- Division of Gastroenterology and Hepatology, Liver Transplant Institute, Loma Linda University, Loma Linda, CA, USA
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Stuyver LJ, McBrayer TR, Tharnish PM, Clark J, Hollecker L, Lostia S, Nachman T, Grier J, Bennett MA, Xie MY, Schinazi RF, Morrey JD, Julander JL, Furman PA, Otto MJ. Inhibition of hepatitis C replicon RNA synthesis by beta-D-2'-deoxy-2'-fluoro-2'-C-methylcytidine: a specific inhibitor of hepatitis C virus replication. Antivir Chem Chemother 2006; 17:79-87. [PMID: 17042329 DOI: 10.1177/095632020601700203] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
beta-D-2'-Deoxy-2'-fluoro-2'-C-methylcytidine (PSI-6130) is a cytidine analogue with potent and selective anti-hepatitis C virus (HCV) activity in the subgenomic HCV replicon assay, 90% effective concentration (EC90)=4.6 +/- 2.0 microM. The spectrum of activity and cytotoxicity profile of PSI-6130 was evaluated against a diverse panel of viruses and cell types, and against two additional HCV-1b replicons. The S282T mutation, which confers resistance to 2'-C-methyl adenosine and other 2'-methylated nucleosides, showed only a 6.5-fold increase in EC90. When assayed for activity against bovine diarrhoea virus (BVDV), which is typically used as a surrogate assay to identify compounds active against HCV, PSI-6130 showed no anti-BVDV activity. Weak antiviral activity was noted against other flaviviruses, including West Nile virus, Dengue type 2, and yellow fever virus. These results indicate that PSI-6130 is a specific inhibitor of HCV. PSI-6130 showed little or no cytotoxicity against various cell types, including human peripheral blood mononuclear and human bone marrow progenitor cells. No mitochondrial toxicity was observed with PSI-6130. The reduced activity against the RdRp S282T mutant suggests that PSI-6130 is an inhibitor of replicon RNA synthesis. Finally, the no-effect dose for mice treated intraperitoneally with PSI-6130 for six consecutive days was > or =100 mg/kg per day.
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Dahari H, Ribeiro RM, Rice CM, Perelson AS. Mathematical modeling of subgenomic hepatitis C virus replication in Huh-7 cells. J Virol 2006; 81:750-60. [PMID: 17035310 PMCID: PMC1797446 DOI: 10.1128/jvi.01304-06] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cell-based hepatitis C virus (HCV) replicon systems have provided a means for understanding HCV replication mechanisms and for testing new antiviral agents. We describe here a mathematical model of HCV replication that assumes that the translation of the HCV polyprotein occurs in the cytoplasm, that HCV RNA synthesis occurs in vesicular-membrane structures, and that the strategy of replication involves a double-stranded RNA intermediate. Our results shed light on the intracellular dynamics of subgenomic HCV RNA replication from transfection to steady state within Huh-7 cells. We predict the following: (i) about 6 x 10(3) ribosomes are involved in generating millions of HCV NS5B-polymerase molecules in a Huh-7 cell, (ii) the observed 10:1 asymmetry of plus- to minus-strand RNA levels can be explained by a higher-affinity (200-fold) interaction of HCV NS5B polymerase-containing replication complexes with HCV minus-strand RNA over HCV plus-strand RNA in order to initiate synthesis, (iii) the latter higher affinity can also account for the observed approximately 6:1 plus-strand/minus-strand ratio in vesicular-membrane structures, and (iv) the introduction of higher numbers of HCV plus-strand RNA by transfection leads to faster attainment of steady-state but does not change the steady-state HCV RNA level. Fully permissive HCV replication systems have been developed, and the model presented here is a first step toward building a comprehensive model for complete HCV replication. Moreover, the model can serve as an important tool in understanding HCV replication mechanisms and should prove useful in designing and evaluating new antivirals against HCV.
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Affiliation(s)
- Harel Dahari
- Theoretical Biology and Biophysics, MS-K710, Los Alamos National Laboratory, NM 87545, USA
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Ivanyi-Nagy R, Kanevsky I, Gabus C, Lavergne JP, Ficheux D, Penin F, Fossé P, Darlix JL. Analysis of hepatitis C virus RNA dimerization and core-RNA interactions. Nucleic Acids Res 2006; 34:2618-33. [PMID: 16707664 PMCID: PMC1463901 DOI: 10.1093/nar/gkl240] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The core protein of hepatitis C virus (HCV) has been shown previously to act as a potent nucleic acid chaperone in vitro, promoting the dimerization of the 3′-untranslated region (3′-UTR) of the HCV genomic RNA, a process probably mediated by a small, highly conserved palindromic RNA motif, named DLS (dimer linkage sequence) [G. Cristofari, R. Ivanyi-Nagy, C. Gabus, S. Boulant, J. P. Lavergne, F. Penin and J. L. Darlix (2004) Nucleic Acids Res., 32, 2623–2631]. To investigate in depth HCV RNA dimerization, we generated a series of point mutations in the DLS region. We find that both the plus-strand 3′-UTR and the complementary minus-strand RNA can dimerize in the presence of core protein, while mutations in the DLS (among them a single point mutation that abolished RNA replication in a HCV subgenomic replicon system) completely abrogate dimerization. Structural probing of plus- and minus-strand RNAs, in their monomeric and dimeric forms, indicate that the DLS is the major if not the sole determinant of UTR RNA dimerization. Furthermore, the N-terminal basic amino acid clusters of core protein were found to be sufficient to induce dimerization, suggesting that they retain full RNA chaperone activity. These findings may have important consequences for understanding the HCV replicative cycle and the genetic variability of the virus.
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Affiliation(s)
| | - Igor Kanevsky
- CNRS-UMR 8113, LBPA-Alembert, Ecole Normale Supérieure de Cachan94235 Cachan Cedex, France
| | | | - Jean-Pierre Lavergne
- Institut de Biologie et Chimie des Protéines, CNRS-UMR 5086, Université Claude Bernard Lyon IIFR 128 Biosciences Lyon-Gerland, 69367 Lyon Cedex 07, France
| | - Damien Ficheux
- Institut de Biologie et Chimie des Protéines, CNRS-UMR 5086, Université Claude Bernard Lyon IIFR 128 Biosciences Lyon-Gerland, 69367 Lyon Cedex 07, France
| | - François Penin
- Institut de Biologie et Chimie des Protéines, CNRS-UMR 5086, Université Claude Bernard Lyon IIFR 128 Biosciences Lyon-Gerland, 69367 Lyon Cedex 07, France
| | - Philippe Fossé
- CNRS-UMR 8113, LBPA-Alembert, Ecole Normale Supérieure de Cachan94235 Cachan Cedex, France
| | - Jean-Luc Darlix
- To whom correspondence should be addressed. Tel: +33 4 72 72 81 69; Fax: +33 4 72 72 87 77;
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