1
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Li YM, He HW, Zhang N. Targeting Protein Phosphatases for the Treatment of Chronic Liver Disease. Curr Drug Targets 2024; 25:171-189. [PMID: 38213163 DOI: 10.2174/0113894501278886231221092522] [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: 10/12/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 01/13/2024]
Abstract
There exists a huge number of patients suffering from chronic liver disease worldwide. As a disease with high incidence and mortality worldwide, strengthening the research on the pathogenesis of chronic liver disease and the development of novel drugs is an important issue related to the health of all human beings. Phosphorylation modification of proteins plays a crucial role in cellular signal transduction, and phosphatases are involved in the development of liver diseases. Therefore, this article summarized the important role of protein phosphatases in chronic liver disease with the aim of facilitating the development of drugs targeting protein phosphatases for the treatment of chronic liver disease.
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Affiliation(s)
- Yi-Ming Li
- NHC Key Laboratory of Biotechnology for Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Hong-Wei He
- NHC Key Laboratory of Biotechnology for Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
| | - Na Zhang
- NHC Key Laboratory of Biotechnology for Microbial Drugs, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China
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2
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Qu Y, Wang W, Xiao MZX, Zheng Y, Liang Q. The interplay between lipid droplets and virus infection. J Med Virol 2023; 95:e28967. [PMID: 37496184 DOI: 10.1002/jmv.28967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/28/2023]
Abstract
As an intracellular parasite, the virus usurps cellular machinery and modulates cellular metabolism pathways to replicate itself in cells. Lipid droplets (LDs) are universally conserved energy storage organelles that not only play vital roles in maintaining lipid homeostasis but are also involved in viral replication. Increasing evidence has demonstrated that viruses take advantage of cellular lipid metabolism by targeting the biogenesis, hydrolysis, and lipophagy of LD during viral infection. In this review, we summarize the current knowledge about the modulation of cellular LD by different viruses, with a special emphasis on the Hepatitis C virus, Dengue virus, and SARS-CoV-2.
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Affiliation(s)
- Yafei Qu
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weili Wang
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Maggie Z X Xiao
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Yuejuan Zheng
- The Research Center for Traditional Chinese Medicine, Shanghai Institute of Infectious Disease and Biosecurity, Shanghai University of Traditional Medicine, Shanghai, China
- Center for Traditional Chinese Medicine and Immunology Research, School of Basic Medical Sciences, Shanghai University of Traditional Medicine, Shanghai, China
| | - Qiming Liang
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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3
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Feng XC, Liu FC, Chen WY, Du J, Liu H. Lipid metabolism of hepatocellular carcinoma impacts targeted therapy and immunotherapy. World J Gastrointest Oncol 2023; 15:617-631. [PMID: 37123054 PMCID: PMC10134209 DOI: 10.4251/wjgo.v15.i4.617] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/09/2023] [Accepted: 03/08/2023] [Indexed: 04/12/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a common malignant tumor that affecting many people's lives globally. The common risk factors for HCC include being overweight and obese. The liver is the center of lipid metabolism, synthesizing most cholesterol and fatty acids. Abnormal lipid metabolism is a significant feature of metabolic reprogramming in HCC and affects the prognosis of HCC patients by regulating inflammatory responses and changing the immune microenvironment. Targeted therapy and immunotherapy are being explored as the primary treatment strategies for HCC patients with unresectable tumors. Here, we detail the specific changes of lipid metabolism in HCC and its impact on both these therapies for HCC. HCC treatment strategies aimed at targeting lipid metabolism and how to integrate them with targeted therapy or immunotherapy rationally are also presented.
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Affiliation(s)
- Xiao-Chen Feng
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200082, China
| | - Fu-Chen Liu
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200082, China
| | - Wu-Yu Chen
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200082, China
| | - Jin Du
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200082, China
| | - Hui Liu
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200082, China
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4
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Xie N, Xiao C, Shu Q, Cheng B, Wang Z, Xue R, Wen Z, Wang J, Shi H, Fan D, Liu N, Xu F. Cell response to mechanical microenvironment cues via Rho signaling: From mechanobiology to mechanomedicine. Acta Biomater 2023; 159:1-20. [PMID: 36717048 DOI: 10.1016/j.actbio.2023.01.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 01/10/2023] [Accepted: 01/17/2023] [Indexed: 01/30/2023]
Abstract
Mechanical cues in the cell microenvironment such as those from extracellular matrix properties, stretching, compression and shear stress, play a critical role in maintaining homeostasis. Upon sensing mechanical stimuli, cells can translate these external forces into intracellular biochemical signals to regulate their cellular behaviors, but the specific mechanisms of mechanotransduction at the molecular level remain elusive. As a subfamily of the Ras superfamily, Rho GTPases have been recognized as key intracellular mechanotransduction mediators that can regulate multiple cell activities such as proliferation, migration and differentiation as well as biological processes such as cytoskeletal dynamics, metabolism, and organ development. However, the upstream mechanosensors for Rho proteins and downstream effectors that respond to Rho signal activation have not been well illustrated. Moreover, Rho-mediated mechanical signals in previous studies are highly context-dependent. In this review, we systematically summarize the types of mechanical cues in the cell microenvironment and provide recent advances on the roles of the Rho-based mechanotransduction in various cell activities, physiological processes and diseases. Comprehensive insights into the mechanical roles of Rho GTPase partners would open a new paradigm of mechanomedicine for a variety of diseases. STATEMENT OF SIGNIFICANCE: In this review, we highlight the critical role of Rho GTPases as signal mediators to respond to physical cues in microenvironment. This article will add a distinct contribution to this set of knowledge by intensively addressing the relationship between Rho signaling and mechanobiology/mechanotransduction/mechanomedcine. This topic has not been discussed by the journal, nor has it yet been developed by the field. The comprehensive picture that will develop, from molecular mechanisms and engineering methods to disease treatment strategies, represents an important and distinct contribution to the field. We hope that this review would help researchers in various fields, especially clinicians, oncologists and bioengineers, who study Rho signal pathway and mechanobiology/mechanotransduction, understand the critical role of Rho GTPase in mechanotransduction.
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Affiliation(s)
- Ning Xie
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Cailan Xiao
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Qiuai Shu
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Bo Cheng
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Ziwei Wang
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Runxin Xue
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Zhang Wen
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Jinhai Wang
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Haitao Shi
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Daiming Fan
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an Shaanxi 710049, China.
| | - Na Liu
- Department of Gastroenterology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Feng Xu
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
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5
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Chen S, Harris M. NS5A domain I antagonises PKR to facilitate the assembly of infectious hepatitis C virus particles. PLoS Pathog 2023; 19:e1010812. [PMID: 36795772 PMCID: PMC9977016 DOI: 10.1371/journal.ppat.1010812] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 03/01/2023] [Accepted: 02/02/2023] [Indexed: 02/17/2023] Open
Abstract
Hepatitis C virus NS5A is a multifunctional phosphoprotein comprised of three domains (DI, DII and DIII). DI and DII have been shown to function in genome replication, whereas DIII has a role in virus assembly. We previously demonstrated that DI in genotype 2a (JFH1) also plays a role in virus assembly, exemplified by the P145A mutant which blocked infectious virus production. Here we extend this analysis to identify two other conserved and surface exposed residues proximal to P145 (C142 and E191) that exhibited no defect in genome replication but impaired virus production. Further analysis revealed changes in the abundance of dsRNA, the size and distribution of lipid droplets (LD) and the co-localisation between NS5A and LDs in cells infected with these mutants, compared to wildtype. In parallel, to investigate the mechanism(s) underpinning this role of DI, we assessed the involvement of the interferon-induced double-stranded RNA-dependent protein kinase (PKR). In PKR-silenced cells, C142A and E191A exhibited levels of infectious virus production, LD size and co-localisation between NS5A and LD that were indistinguishable from wildtype. Co-immunoprecipitation and in vitro pulldown experiments confirmed that wildtype NS5A domain I (but not C142A or E191A) interacted with PKR. We further showed that the assembly phenotype of C142A and E191A was restored by ablation of interferon regulatory factor-1 (IRF1), a downstream effector of PKR. These data suggest a novel interaction between NS5A DI and PKR that functions to evade an antiviral pathway that blocks virus assembly through IRF1.
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Affiliation(s)
- Shucheng Chen
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Mark Harris
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
- * E-mail:
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6
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Leslie J, Geh D, Elsharkawy AM, Mann DA, Vacca M. Metabolic dysfunction and cancer in HCV: Shared pathways and mutual interactions. J Hepatol 2022; 77:219-236. [PMID: 35157957 DOI: 10.1016/j.jhep.2022.01.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/12/2022] [Accepted: 01/31/2022] [Indexed: 12/16/2022]
Abstract
HCV hijacks many host metabolic processes in an effort to aid viral replication. The resulting hepatic metabolic dysfunction underpins many of the hepatic and extrahepatic manifestations of chronic hepatitis C (CHC). However, the natural history of CHC is also substantially influenced by the host metabolic status: obesity, insulin resistance and hepatic steatosis are major determinants of CHC progression toward hepatocellular carcinoma (HCC). Direct-acting antivirals (DAAs) have transformed the treatment and natural history of CHC. While DAA therapy effectively eradicates the virus, the long-lasting overlapping metabolic disease can persist, especially in the presence of obesity, increasing the risk of liver disease progression. This review covers the mechanisms by which HCV tunes hepatic and systemic metabolism, highlighting how systemic metabolic disturbance, lipotoxicity and chronic inflammation favour disease progression and a precancerous niche. We also highlight the therapeutic implications of sustained metabolic dysfunction following sustained virologic response as well as considerations for patients who develop HCC on the background of metabolic dysfunction.
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Affiliation(s)
- Jack Leslie
- Newcastle Fibrosis Research Group, Biosciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Daniel Geh
- Newcastle Fibrosis Research Group, Biosciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Ahmed M Elsharkawy
- Liver Unit, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital, Queen Elizabeth Medical Centre, Birmingham, B15 2TH UK; National Institute for Health Research, Birmingham Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Derek A Mann
- Newcastle Fibrosis Research Group, Biosciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK; Department of Gastroenterology and Hepatology, School of Medicine, Koç University, Istanbul, Turkey.
| | - Michele Vacca
- Interdisciplinary Department of Medicine, Università degli Studi di Bari "Aldo Moro", Bari, Italy.
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7
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Marques-Magalhães Â, Cruz T, Costa ÂM, Estêvão D, Rios E, Canão PA, Velho S, Carneiro F, Oliveira MJ, Cardoso AP. Decellularized Colorectal Cancer Matrices as Bioactive Scaffolds for Studying Tumor-Stroma Interactions. Cancers (Basel) 2022; 14:cancers14020359. [PMID: 35053521 PMCID: PMC8773780 DOI: 10.3390/cancers14020359] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/02/2022] [Accepted: 01/06/2022] [Indexed: 12/12/2022] Open
Abstract
More than a physical structure providing support to tissues, the extracellular matrix (ECM) is a complex and dynamic network of macromolecules that modulates the behavior of both cancer cells and associated stromal cells of the tumor microenvironment (TME). Over the last few years, several efforts have been made to develop new models that accurately mimic the interconnections within the TME and specifically the biomechanical and biomolecular complexity of the tumor ECM. Particularly in colorectal cancer, the ECM is highly remodeled and disorganized and constitutes a key component that affects cancer hallmarks, such as cell differentiation, proliferation, angiogenesis, invasion and metastasis. Therefore, several scaffolds produced from natural and/or synthetic polymers and ceramics have been used in 3D biomimetic strategies for colorectal cancer research. Nevertheless, decellularized ECM from colorectal tumors is a unique model that offers the maintenance of native ECM architecture and molecular composition. This review will focus on innovative and advanced 3D-based models of decellularized ECM as high-throughput strategies in colorectal cancer research that potentially fill some of the gaps between in vitro 2D and in vivo models. Our aim is to highlight the need for strategies that accurately mimic the TME for precision medicine and for studying the pathophysiology of the disease.
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Affiliation(s)
- Ângela Marques-Magalhães
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- INEB-Institute of Biomedical Engineering, University of Porto, 4200-135 Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, 4050-313 Porto, Portugal
| | - Tânia Cruz
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- INEB-Institute of Biomedical Engineering, University of Porto, 4200-135 Porto, Portugal
| | - Ângela Margarida Costa
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- INEB-Institute of Biomedical Engineering, University of Porto, 4200-135 Porto, Portugal
| | - Diogo Estêvão
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- INEB-Institute of Biomedical Engineering, University of Porto, 4200-135 Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, 4050-313 Porto, Portugal
| | - Elisabete Rios
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- IPATIMUP-Institute of Pathology and Molecular Immunology, University of Porto, 4200-135 Porto, Portugal
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal;
- Department of Pathology, Centro Hospitalar Universitário São João, 4200-319 Porto, Portugal
| | - Pedro Amoroso Canão
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal;
- Department of Pathology, Centro Hospitalar Universitário São João, 4200-319 Porto, Portugal
| | - Sérgia Velho
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- IPATIMUP-Institute of Pathology and Molecular Immunology, University of Porto, 4200-135 Porto, Portugal
| | - Fátima Carneiro
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- IPATIMUP-Institute of Pathology and Molecular Immunology, University of Porto, 4200-135 Porto, Portugal
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal;
- Department of Pathology, Centro Hospitalar Universitário São João, 4200-319 Porto, Portugal
| | - Maria José Oliveira
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- INEB-Institute of Biomedical Engineering, University of Porto, 4200-135 Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, 4050-313 Porto, Portugal
- Department of Pathology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal;
| | - Ana Patrícia Cardoso
- i3S-Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal; (Â.M.-M.); (T.C.); (Â.M.C.); (D.E.); (E.R.); (S.V.); (F.C.); (M.J.O.)
- INEB-Institute of Biomedical Engineering, University of Porto, 4200-135 Porto, Portugal
- Correspondence: ; Tel.: +351-22-607-4900
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8
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Ge H, Tian M, Pei Q, Tan F, Pei H. Extracellular Matrix Stiffness: New Areas Affecting Cell Metabolism. Front Oncol 2021; 11:631991. [PMID: 33718214 PMCID: PMC7943852 DOI: 10.3389/fonc.2021.631991] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 01/04/2021] [Indexed: 12/12/2022] Open
Abstract
In recent years, in-depth studies have shown that extracellular matrix stiffness plays an important role in cell growth, proliferation, migration, immunity, malignant transformation, and apoptosis. Most of these processes entail metabolic reprogramming of cells. However, the exact mechanism through which extracellular matrix stiffness leads to metabolic reprogramming remains unclear. Insights regarding the relationship between extracellular matrix stiffness and metabolism could help unravel novel therapeutic targets and guide development of clinical approaches against a myriad of diseases. This review provides an overview of different pathways of extracellular matrix stiffness involved in regulating glucose, lipid and amino acid metabolism.
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Affiliation(s)
- Heming Ge
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Mengxiang Tian
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Qian Pei
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Fengbo Tan
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Haiping Pei
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
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9
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Sulfonated Nanomaterials with Broad-Spectrum Antiviral Activity Extending beyond Heparan Sulfate-Dependent Viruses. Antimicrob Agents Chemother 2020; 64:AAC.02001-20. [PMID: 32988820 DOI: 10.1128/aac.02001-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 09/19/2020] [Indexed: 12/13/2022] Open
Abstract
Viral infections are among the main causes of death worldwide, and we lack antivirals for the majority of viruses. Heparin-like sulfated or sulfonated compounds have been known for decades for their ability to prevent infection by heparan sulfate proteoglycan (HSPG)-dependent viruses but only in a reversible way. We have previously shown that gold nanoparticles and β-cyclodextrins coated with mercapto-undecane sulfonic acid (MUS) inhibit HSPG-dependent viruses irreversibly while retaining the low-toxicity profile of most heparin-like compounds. In this work, we show that, in stark contrast to heparin, these compounds also inhibit different strains of influenza virus and vesicular stomatitis virus (VSV), which do not bind HSPG. The antiviral action is virucidal and irreversible for influenza A virus (H1N1), while for VSV, there is a reversible inhibition of viral attachment to the cell. These results further broaden the spectrum of activity of MUS-coated gold nanoparticles and β-cyclodextrins.
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10
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Liu B, Gao TT, Fu XY, Xu ZH, Ren H, Zhao P, Qi ZT, Qin ZL. PTEN Lipid Phosphatase Activity Enhances Dengue Virus Production through Akt/FoxO1/Maf1 Signaling. Virol Sin 2020; 36:412-423. [PMID: 33044659 DOI: 10.1007/s12250-020-00291-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 07/31/2020] [Indexed: 01/19/2023] Open
Abstract
Dengue virus (DENV) is an arthropod-borne viral pathogen and a global health burden. Knowledge of the DENV-host interactions that mediate virus pathogenicity remains limited. Host lipid metabolism is hijacked by DENV for virus replication in which lipid droplets (LDs) play a key role during the virus lifecycle. In this study, we reveal a novel role for phosphatase and tensin homolog deleted on chromosome 10 (PTEN) in LDs-mediated DENV infection. We demonstrate that PTEN expression is downregulated upon DENV infection through post-transcriptional regulation and, in turn, PTEN overexpression enhances DENV replication. PTEN lipid phosphatase activity was found to decrease cellular LDs area and number through Akt/FoxO1/Maf1 signaling, which, together with autophagy, enhanced DENV replication and virus production. We therefore provide mechanistic insight into the interaction between lipid metabolism and the DENV replication cycle.
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Affiliation(s)
- Bin Liu
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China
| | - Ting-Ting Gao
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China.,Department of Nephrology, The Air Force Hospital from Northern Theater of PLA, Shenyang 110042, China
| | - Xiao-Yu Fu
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China
| | - Zhen-Hao Xu
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China
| | - Hao Ren
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China
| | - Ping Zhao
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China
| | - Zhong-Tian Qi
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China.
| | - Zhao-Ling Qin
- Department of Microbiology, Shanghai Key Laboratory of Medical Biodefense, Second Military Medical University, Shanghai, 200433, China.
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11
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Virzì A, Roca Suarez AA, Baumert TF, Lupberger J. Rewiring Host Signaling: Hepatitis C Virus in Liver Pathogenesis. Cold Spring Harb Perspect Med 2020; 10:cshperspect.a037366. [PMID: 31501266 DOI: 10.1101/cshperspect.a037366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hepatitis C virus (HCV) is a major cause of liver disease including metabolic disease, fibrosis, cirrhosis, and hepatocellular carcinoma (HCC). HCV induces and promotes liver disease progression by perturbing a range of survival, proliferative, and metabolic pathways within the proinflammatory cellular microenvironment. The recent breakthrough in antiviral therapy using direct-acting antivirals (DAAs) can cure >90% of HCV patients. However, viral cure cannot fully eliminate the HCC risk, especially in patients with advanced liver disease or comorbidities. HCV induces an epigenetic viral footprint that promotes a pro-oncogenic hepatic signature, which persists after DAA cure. In this review, we summarize the main signaling pathways deregulated by HCV infection, with potential impact on liver pathogenesis. HCV-induced persistent signaling patterns may serve as biomarkers for the stratification of HCV-cured patients at high risk of developing HCC. Moreover, these signaling pathways are potential targets for novel chemopreventive strategies.
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Affiliation(s)
- Alessia Virzì
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.,Université de Strasbourg, 67000 Strasbourg, France
| | - Armando Andres Roca Suarez
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.,Université de Strasbourg, 67000 Strasbourg, France
| | - Thomas F Baumert
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.,Université de Strasbourg, 67000 Strasbourg, France.,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, 67000 Strasbourg, France.,Institut Universitaire de France (IUF), 75231 Paris, France
| | - Joachim Lupberger
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.,Université de Strasbourg, 67000 Strasbourg, France
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12
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Tu T, Chen J, Chen L, Stiles BL. Dual-Specific Protein and Lipid Phosphatase PTEN and Its Biological Functions. Cold Spring Harb Perspect Med 2020; 10:cshperspect.a036301. [PMID: 31548229 DOI: 10.1101/cshperspect.a036301] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) encodes a 403-amino acid protein with an amino-terminal domain that shares sequence homology with the actin-binding protein tensin and the putative tyrosine-protein phosphatase auxilin. Crystal structure analysis of PTEN has revealed a C2 domain that binds to phospholipids in membranes and a phosphatase domain that displays dual-specific activity toward both tyrosine (Y), serine (S)/threonine (T), as well as lipid substrates in vitro. Characterized primarily as a lipid phosphatase, PTEN plays important roles in multiple cellular processes including cell growth/survival as well as metabolism.
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Affiliation(s)
- Taojian Tu
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California 90033, USA
| | - Jingyu Chen
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California 90033, USA
| | - Lulu Chen
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California 90033, USA
| | - Bangyan L Stiles
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California 90033, USA.,Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, USA
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13
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Clément S, Sobolewski C, Gomes D, Rojas A, Goossens N, Conzelmann S, Calo N, Negro F, Foti M. Activation of the oncogenic miR-21-5p promotes HCV replication and steatosis induced by the viral core 3a protein. Liver Int 2019; 39:1226-1236. [PMID: 30938910 DOI: 10.1111/liv.14112] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/11/2019] [Accepted: 03/28/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS miR-21-5p is a potent oncogenic microRNA targeting many key tumour suppressors including phosphatase and tensin homolog (PTEN). We recently identified PTEN as a key factor modulated by hepatitis C virus (HCV) to promote virion egress. In hepatocytes, expression of HCV-3a core protein was sufficient to downregulate PTEN and to trigger lipid droplet accumulation. Here, we investigated whether HCV controls PTEN expression through miR-21-5p-dependent mechanisms to trigger steatosis in hepatocytes and to promote HCV life cycle. METHODS MiR-21-5p expression in HCV-infected patients was evaluated by transcriptome meta-analysis. HCV replication and viral particle production were investigated in Jc1-infected Huh-7 cells after miR-21-5p inhibition. PTEN expression and steatosis were assessed in HCV-3a core protein-expressing Huh-7 cells and in mouse primary hepatocytes having miR-21-5p inhibited or genetically deleted respectively. HCV-3a core-induced steatosis was assessed in vivo in Mir21a knockout mice. RESULTS MiR-21-5p expression was significantly increased in hepatic tissues from HCV-infected patients. Infection by HCV-Jc1, or transduction with HCV-3a core, upregulated miR-21-5p expression and/or activity in Huh-7 cells. miR-21-5p inhibition decreased HCV replication and release of infectious virions by Huh-7 cells. HCV-3a core-induced PTEN downregulation and steatosis were further prevented in Huh-7 cells following miR-21-5p inhibition or in Mir21a knockout mouse primary hepatocytes. Finally, steatosis induction by AAV8-mediated HCV-3a core expression was reduced in vivo in Mir21a knockout mice. CONCLUSION MiR-21-5p activation by HCV is a key molecular step, promoting both HCV life cycle and HCV-3a core-induced steatosis and may be among the molecular changes induced by HCV-3a to promote carcinogenesis.
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Affiliation(s)
- Sophie Clément
- Division of Clinical Pathology, University Hospital, Geneva, Switzerland
| | - Cyril Sobolewski
- Faculty of Medicine, Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Diana Gomes
- Faculty of Medicine, Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Angela Rojas
- Faculty of Medicine, Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Nicolas Goossens
- Division of Gastroenterology and Hepatology, University Hospital, Geneva, Switzerland
| | - Stéphanie Conzelmann
- Faculty of Medicine, Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Nicolas Calo
- Faculty of Medicine, Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Francesco Negro
- Division of Clinical Pathology, University Hospital, Geneva, Switzerland.,Division of Gastroenterology and Hepatology, University Hospital, Geneva, Switzerland.,Faculty of Medicine, Diabetes Center, University of Geneva, Geneva, Switzerland
| | - Michelangelo Foti
- Faculty of Medicine, Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland.,Faculty of Medicine, Diabetes Center, University of Geneva, Geneva, Switzerland
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14
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Naderali E, Khaki AA, Rad JS, Ali-Hemmati A, Rahmati M, Charoudeh HN. Regulation and modulation of PTEN activity. Mol Biol Rep 2018; 45:2869-2881. [PMID: 30145641 DOI: 10.1007/s11033-018-4321-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 08/20/2018] [Indexed: 01/04/2023]
Abstract
PTEN (Phosphatase and tensin homolog deleted on chromosome ten) is a tumor suppressor that is frequently mutated in most human cancers. PTEN is a lipid and protein phosphatase that antagonizes PI3K/AKT pathway through lipid phosphatase activity at the plasma membrane. More recent studies showed that, in addition to the putative role of PTEN as a PI(3,4,5)P3 3-phosphatase, it is a PI(3,4)P2 3-phosphatase during stimulation of class I PI3K signaling pathway by growth factor. Although PTEN tumor suppressor function via it's lipid phosphatase activity occurs primarily in the plasma membrane, it can also be found in the nucleus, in cytoplasmic organelles and extracellular space. PTEN has also shown phosphatase independent functions in the nucleus. PTEN can exit from the cell through exosomal export or secretion and has a tumor suppressor function in adjacent cells. PTEN has a critical role in growth, the cell cycle, protein synthesis, survival, DNA repair and migration. Understanding the regulation of PTEN function, activity, stability, localization and its dysregulation outcomes and also the intracellular and extracellular role of PTEN and paracrine role of PTEN-L in tumor cells as an exogenous therapeutic agent can help to improve clinical conceptualization and treatment of cancer.
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Affiliation(s)
- Elahe Naderali
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Afshin Khaki
- Department of Anatomical sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jafar Soleymani Rad
- Department of Anatomical sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Ali-Hemmati
- Department of Anatomical sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Rahmati
- Department of Clinical Biochemistry Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hojjatollah Nozad Charoudeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. .,Cell Therapy Research Laboratory, Drug Applied Research Center, Tabriz University of Medical Sciences, P.O. Box: 51656-65811, Tabriz, Iran.
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15
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Conti B, Porcu C, Viscomi C, Minutolo A, Costantini S, Corazzari M, Iannucci G, Barbaro B, Balsano C. Small heterodimer partner 1 directly interacts with NS5A viral protein and has a key role in HCV related liver cell transformation. Oncotarget 2018; 7:84575-84586. [PMID: 27661118 PMCID: PMC5356682 DOI: 10.18632/oncotarget.12144] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/20/2016] [Indexed: 12/14/2022] Open
Abstract
HCV life cycle is strictly correlated with the hepatocyte lipid metabolism; moreover, the progression of HCV chronic hepatitis is accelerated by the presence of liver steatosis. Among the steatogenic genes deregulated during the HCV infection one of the most attractive is the Small Heterodimer Protein 1 (SHP1; NR0B2), that is involved in a remarkable number of metabolic functions. HCV NS5A is an essential and integral component of the HCV membranous-web replicon complex (RC) and plays an essential role to transfer the viral genome from the RCs to the surface of the lipid droplets (LDs) that, in turn, play a key function during HCV life cycle. With the help of a HCV infection model, we demonstrate a functional interaction between SHP1 and HCV NS5A protein. SHP1 silencing (siSHP1) reversed the pro-oncogenic effects of HCV infection, inducing a significant decrease in liver lipid accumulation and in NS5A protein expression. Moreover, siSHP1 causes a strong modulation of some genes involved in HCV-related EMT, such as: HNF4, a central regulators of hepatocyte differentiation, E-Cadherin, SNAILs. Our data suggest that SHP1 results not only to be strictly connected to the pathogenesis of HCV-related liver steatosis, but also to its progression towards the liver transformation.
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Affiliation(s)
- Beatrice Conti
- Laboratory of Molecular Virology and Oncoloy, Francesco Balsano Foundation, ex A. Cesalpino Foundation, Rome, Italy
| | - Cristiana Porcu
- Institute of Biology and Molecular Pathology (IBPM) - CNR (National Research Council), Rome, Italy
| | - Carmela Viscomi
- Laboratory of Molecular Virology and Oncoloy, Francesco Balsano Foundation, ex A. Cesalpino Foundation, Rome, Italy
| | - Antonella Minutolo
- Laboratory of Molecular Virology and Oncoloy, Francesco Balsano Foundation, ex A. Cesalpino Foundation, Rome, Italy.,Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | - Susan Costantini
- CROM, Istituto Nazionale Tumori "Fondazione G.Pascale", IRCSS, Napoli, Italy
| | - Marco Corazzari
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | - Gino Iannucci
- Laboratory of Molecular Virology and Oncoloy, Francesco Balsano Foundation, ex A. Cesalpino Foundation, Rome, Italy
| | - Barbara Barbaro
- Institute of Biology and Molecular Pathology (IBPM) - CNR (National Research Council), Rome, Italy
| | - Clara Balsano
- Laboratory of Molecular Virology and Oncoloy, Francesco Balsano Foundation, ex A. Cesalpino Foundation, Rome, Italy.,Institute of Biology and Molecular Pathology (IBPM) - CNR (National Research Council), Rome, Italy
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16
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del Campo JA, García-Valdecasas M, Gil-Gómez A, Rojas Á, Gallego P, Ampuero J, Gallego-Durán R, Pastor H, Grande L, Padillo FJ, Muntané J, Romero-Gómez M. Simvastatin and metformin inhibit cell growth in hepatitis C virus infected cells via mTOR increasing PTEN and autophagy. PLoS One 2018; 13:e0191805. [PMID: 29385181 PMCID: PMC5791999 DOI: 10.1371/journal.pone.0191805] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 01/11/2018] [Indexed: 01/24/2023] Open
Abstract
Hepatitis C virus (HCV) infection has been related to increased risk of development of hepatocellular carcinoma (HCC) while metformin (M) and statins treatment seemed to protect against HCC development. In this work, we aim to identify the mechanisms by which metformin and simvastatin (S) could protect from liver cancer. Huh7.5 cells were infected with HCV particles and treated with M+S. Human primary hepatocytes were treated with M+S. Treatment with both drugs inhibited Huh7.5 cell growth and HCV infection. In non-infected cells S increased translational controlled tumor protein (TCTP) and phosphatase and tensin homolog (PTEN) proteins while M inhibited mammalian target of rapamycin (mTOR) and TCTP. Simvastatin and metformin co-administered down-regulated mTOR and TCTP, while PTEN was increased. In cells infected by HCV, mTOR, TCTP, p62 and light chain 3B II (LC3BII) were increased and PTEN was decreased. S+M treatment increased PTEN, p62 and LC3BII in Huh7.5 cells. In human primary hepatocytes, metformin treatment inhibited mTOR and PTEN, but up-regulated p62, LC3BII and Caspase 3. In conclusion, simvastatin and metformin inhibited cell growth and HCV infection in vitro. In human hepatocytes, metformin increased cell-death markers. These findings suggest that M+S treatment could be useful in therapeutic prevention of HCV-related hepatocellular carcinoma.
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Affiliation(s)
- José A. del Campo
- Department of Digestive Diseases and CIBERehd, Valme University Hospital, Servicio Andaluz de Salud, Seville, Spain
- * E-mail:
| | - Marta García-Valdecasas
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
| | - Antonio Gil-Gómez
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
| | - Ángela Rojas
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
| | - Paloma Gallego
- Department of Digestive Diseases and CIBERehd, Valme University Hospital, Servicio Andaluz de Salud, Seville, Spain
| | - Javier Ampuero
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
| | - Rocío Gallego-Durán
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
| | - Helena Pastor
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
| | - Lourdes Grande
- Department of Digestive Diseases and CIBERehd, Valme University Hospital, Servicio Andaluz de Salud, Seville, Spain
| | - Francisco J. Padillo
- Department of General Surgery, Rocío University Hospital, CSIC and University of Seville, Seville, Spain
| | - Jordi Muntané
- Department of General Surgery, Rocío University Hospital, CSIC and University of Seville, Seville, Spain
| | - Manuel Romero-Gómez
- Department of Digestive Disease, Biomedicine Institute of Seville & CIBERehd, Rocío University Hospital, Seville, Spain
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17
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Wang H, Feng Z, Xie J, Wen F, Jv M, Liang T, Li J, Wang Y, Zuo Y, Li S, Li R, Li Z, Zhang B, Liang X, Liu S, Shi W, Wang W. Podocyte-specific knockin of PTEN protects kidney from hyperglycemia. Am J Physiol Renal Physiol 2018; 314:F1096-F1107. [PMID: 29361670 DOI: 10.1152/ajprenal.00575.2017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) has proven to be downregulated in podocytes challenged with high glucose (HG), and knockout of PTEN in podocytes aggravated the progression of diabetic kidney disease (DKD). However, whether podocyte-specific knockin of PTEN protects the kidney against hyperglycemia in vivo remains unknown. The inducible podocyte-specific PTEN knockin (PPKI) mice were generated by crossing newly created transgenic loxP-stop- loxP-PTEN mice with podocin-iCreERT2 mice. Diabetes mellitus was induced in mice by intraperitoneal injection of streptozotocin at a dose of 150 mg/kg. In vitro, small interfering RNA and adenovirus interference were used to observe the role of PTEN in HG-treated podocytes. Our data demonstrated that PTEN was markedly reduced in the podocytes of patients with DKD and focal segmental glomerulosclerosis, as well as in those of db/db mice. Interestingly, podocyte-specific knockin of PTEN significantly alleviated albuminuria, mesangial matrix expansion, effacement of podocyte foot processes, and incrassation of glomerular basement membrane in diabetic PPKI mice compared with wild-type diabetic mice, whereas no alteration was observed in the level of blood glucose. The potential renal protection of overexpressed PTEN in podocytes was partly attributed with an improvement in autophagy and motility and the inhibition of apoptosis. Our results showed that podocyte-specific knockin of PTEN protected the kidney against hyperglycemia in vivo , suggesting that targeting PTEN might be a novel and promising therapeutic strategy against DKD.
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Affiliation(s)
- Huizhen Wang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Ziwei Feng
- Division of Urology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Jianteng Xie
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Feng Wen
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Menglei Jv
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Tiantian Liang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Jing Li
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Yanhui Wang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Yangyang Zuo
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Sheng Li
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Ruizhao Li
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Zhilian Li
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Bin Zhang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Xinling Liang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Shuangxin Liu
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Wei Shi
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
| | - Wenjian Wang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences , Guangzhou , China
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18
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Treatment with PTEN-Long protein inhibits hepatitis C virus replication. Virology 2017; 511:1-8. [PMID: 28783500 DOI: 10.1016/j.virol.2017.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 07/26/2017] [Accepted: 08/02/2017] [Indexed: 01/15/2023]
Abstract
Hepatitis C virus (HCV) infection is a confirmed risk factor for hepatocellular carcinoma (HCC). Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) possesses tumor suppression function that is frequently defective in HCC tumors. PTEN-Long, a translation isoform of PTEN, functions in a cell non-autonomous manner. In this study, we demonstrated that intracellular overexpression of PTEN-Long inhibits HCV replication. More importantly, we showed that treatment with extracellular PTEN-Long protein inhibits HCV replication in a dose-dependent manner. Furthermore, we showed that PTEN-Long interacts with HCV core protein and this interaction is required for HCV replication inhibition by PTEN-Long. In summary, we demonstrated, for the first time, that PTEN-Long protein, an isoform of the canonical PTEN and in the form of extracellular protein treatment, inhibits HCV replication. Our study offers an opportunity for developing additional anti-HCV agents.
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19
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Abstract
Hepatitis C virus (HCV) infection leads to severe liver diseases including hepatocellular carcinoma (HCC). Phosphatase and tensin homolog deleted on chromosome 10 (PTEN), a tumour suppressor, is frequently mutated or deleted in HCC tumors. PTEN has previously been demonstrated to inhibit HCV secretion. In this study, we determined the effects of PTEN on the other steps in HCV life cycle, including entry, translation, and replication. We showed that PTEN inhibits HCV entry through its lipid phosphatase activity. PTEN has no effect on HCV RNA translation. PTEN decreases HCV replication and the protein phosphatase activity of PTEN is essential for this function. PTEN interacts with the HCV core protein and requires R50 in domain I of HCV core and PTEN residues 1–185 for this interaction. This interaction is required for PTEN-mediated inhibition of HCV replication. This gives rise to a reduction in PTEN levels and intracellular lipid abundance, which may in turn regulate HCV replication. HCV core domain I protein increases the lipid phosphatase activity of PTEN in an in vitro assay, suggesting that HCV infection can also regulate PTEN. Taken together, our results demonstrated an important regulatory role of PTEN in the HCV life cycle.
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20
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Abstract
PURPOSE OF REVIEW Direct-acting antiviral agents (DAAs) have markedly improved the prognosis of hepatitis C virus (HCV)-genotype 3 (GT3), a highly prevalent infection worldwide. However, in patients with hepatic fibrosis, cirrhosis, or hepatocellular carcinoma (HCC), GT3 infection presents a treatment challenge compared with other genotypes. The dependence of the HCV life cycle on host lipid metabolism suggests the possible utility of targeting host cellular factors for combination anti-HCV therapy. We discuss current and emergent DAA regimens for HCV-GT3 treatment. We then summarize recent research findings on the reliance of HCV entry, replication, and virion assembly on host lipid metabolism. RECENT FINDINGS Current HCV treatment guidelines recommend the use of daclatasvir plus sofosbuvir (DCV/SOF) or sofosbuvir plus velpatasvir (SOF/VEL) for the management of GT3 based upon clinical efficacy [≥88% overall sustained virological response (SVR)] and tolerability. Potential future DAA options, such as SOF/VEL co-formulated with GS-9857, also look promising in treating cirrhotic GT3 patients. However, HCV resistance to DAAs will likely continue to impact the therapeutic efficacy of interferon-free treatment regimens. Disruption of HCV entry by targeting required host cellular receptors shows potential in minimizing HCV resistance and broadening therapeutic options for certain subpopulations of GT3 patients. The use of cholesterol biosynthesis and transport inhibitors may also improve health outcomes for GT3 patients when used synergistically with DAAs. Due to the morbidity and mortality associated with HCV-GT3 infection compared to other genotypes, efforts should be made to address current limitations in the therapeutic prevention and management of HCV-GT3 infection.
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21
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Zhao J, Liang CQ, Li W, Yao DK. Efficacy of addition of statins to interferon α and ribavirin for hepatitis C: A meta-analysis. Shijie Huaren Xiaohua Zazhi 2017; 25:484-490. [DOI: 10.11569/wcjd.v25.i6.484] [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
AIM To systematically evaluate the therapeutic efficacy of statins as add-on to interferon α (IFNα) plus ribavirin (RBV) therapy for hepatitis C.
METHODS A thorough search was done in PubMed, Web of Science, EMBASE, Cochrane Library, CNKI, Wanfang Data, SinoMed and VIP to collect articles on statins as add-on to IFNα plus RBV therapy for hepatitis C. Quality of each study was assessed, and meta-analysis of sustained virological response (SVR), rapid virological response (RVR) and early virological response (EVR) was performed with RevMan5.3 software.
RESULTS Seven randomized controlled trials were included with 202 patients in the add-on therapy group and 198 patients in the control group. Meta-analysis showed that triple therapy with IFNα, RBV and statin was superior to therapy with IFNα and RBV in achieving SVR and RVR (OR = 2.18, 95%CI: 1.42-3.34, P = 0.0004; OR = 2.37, 95%CI: 1.11-5.09, P = 0.03), while the difference in EVR was not significant (OR = 1.42, 95%CI: 0.86-2.36, P = 0.17). For hepatitis C virus genotype 1, the increase in the SVR rate remained significant (OR = 2.41, 95%CI: 1.33-4.36, P = 0.004).
CONCLUSION The addition of statins to IFNα and RBV can improve sustained virological response and increase the cure rate in hepatitis C.
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22
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Awad A, Gassama-Diagne A. PI3K/SHIP2/PTEN pathway in cell polarity and hepatitis C virus pathogenesis. World J Hepatol 2017; 9:18-29. [PMID: 28105255 PMCID: PMC5220268 DOI: 10.4254/wjh.v9.i1.18] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 09/10/2016] [Accepted: 11/02/2016] [Indexed: 02/06/2023] Open
Abstract
Hepatitis C virus (HCV) infects hepatocytes, polarized cells in the liver. Chronic HCV infection often leads to steatosis, fibrosis, cirrhosis and hepatocellular carcinoma, and it has been identified as the leading cause of liver transplantation worldwide. The HCV replication cycle is dependent on lipid metabolism and particularly an accumulation of lipid droplets in host cells. Phosphoinositides (PIs) are minor phospholipids enriched in different membranes and their levels are tightly regulated by specific PI kinases and phosphatases. PIs are implicated in a vast array of cellular responses that are central to morphogenesis, such as cytoskeletal changes, cytokinesis and the recruitment of downstream effectors to govern mechanisms involved in polarization and lumen formation. Important reviews of the literature identified phosphatidylinositol (PtdIns) 4-kinases, and their lipid products PtdIns(4)P, as critical regulators of the HCV life cycle. SH2-containing inositol polyphosphate 5-phosphatase (SHIP2), phosphoinositide 3-kinase (PI3K) and their lipid products PtdIns(3,4)P2 and PtdIns(3,4,5)P3, respectively, play an important role in the cell membrane and are key to the establishment of apicobasal polarity and lumen formation. In this review, we will focus on these new functions of PI3K and SHIP2, and their deregulation by HCV, causing a disruption of apicobasal polarity, actin organization and extracellular matrix assembly. Finally we will highlight the involvement of this pathway in the event of insulin resistance and nonalcoholic fatty liver disease related to HCV infection.
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Sanchez-Pareja A, Clément S, Peyrou M, Spahr L, Negro F, Rubbia-Brandt L, Foti M. Phosphatase and tensin homolog is a differential diagnostic marker between nonalcoholic and alcoholic fatty liver disease. World J Gastroenterol 2016; 22:3735-3745. [PMID: 27076758 PMCID: PMC4814736 DOI: 10.3748/wjg.v22.i14.3735] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 01/28/2016] [Accepted: 03/02/2016] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the protein expression of phosphatase and tensin homolog (PTEN) in human liver biopsies of patients with alcoholic and non-alcoholic liver disease.
METHODS: PTEN protein expression was assessed by immunohistochemistry in formalin-fixed, paraffin-embedded liver sections of patients with non-alcoholic fatty liver disease (NAFLD) (n = 44) or alcoholic liver disease (ALD) (n = 25). Liver resections obtained from 3 healthy subjects candidate for partial liver donation served as controls. Histological evaluations were performed by two experienced pathologists, and diagnoses established based on international criteria. The intensity of the PTEN staining in nuclei was compared between steatotic and non-steatotic areas of each liver fragment analyzed. For each liver specimen, the antibody-stained sections were examined and scored blindly by three independent observers, who were unaware of the patients’ clinical history.
RESULTS: In healthy individuals, PTEN immunostaining was intense in both the cytoplasm and nuclei of all hepatocytes. However, PTEN was strongly downregulated in both the nucleus and the cytoplasm of hepatocytes from steatotic areas in patients with NAFLD, independently of the disease stage. In contrast, no changes in PTEN protein expression were observed in patients with ALD, regardless of the presence of steatosis or the stage of the disease. The degree of PTEN downregulation in hepatocytes of patients with NAFLD correlated with the percentage of steatosis (r = 0.3061, P = 0.0459) and the BMI (r = 0.4268, P = 0.0043). Hovewer, in patients with ALD, PTEN expression was not correlated with the percentage of steatosis with or without obesity as a confounding factor (P = 0.5574). Finally, PTEN expression level in steatotic areas of ALD patients was significantly different from that seen in steatotic areas of NAFLD patients (P < 0.0001).
CONCLUSION: PTEN protein expression is downregulated early in NAFLD, but not in ALD. PTEN immunohistochemical detection could help in the differential diagnosis of NAFLD and ALD.
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Branche E, Conzelmann S, Parisot C, Bedert L, Lévy PL, Bartosch B, Clément S, Negro F. Hepatitis C Virus Increases Occludin Expression via the Upregulation of Adipose Differentiation-Related Protein. PLoS One 2016; 11:e0146000. [PMID: 26731658 PMCID: PMC4701191 DOI: 10.1371/journal.pone.0146000] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 12/11/2015] [Indexed: 12/12/2022] Open
Abstract
The hepatitis C virus (HCV) life cycle is closely associated with lipid metabolism. In particular, HCV assembly initiates at the surface of lipid droplets. To further understand the role of lipid droplets in HCV life cycle, we assessed the relationship between HCV and the adipose differentiation-related protein (ADRP), a lipid droplet-associated protein. Different steps of HCV life cycle were assessed in HCV-infected human Huh-7 hepatoma cells overexpressing ADRP upon transduction with a lentiviral vector. HCV infection increased ADRP mRNA and protein expression levels by 2- and 1.5-fold, respectively. The overexpression of ADRP led to an increase of (i) the surface of lipid droplets, (ii) the total cellular neutral lipid content (2.5- and 5-fold increase of triglycerides and cholesterol esters, respectively), (iii) the cellular free cholesterol level (5-fold) and (iv) the HCV particle production and infectivity (by 2- and 3.5-fold, respectively). The investigation of different steps of the HCV life cycle indicated that the ADRP overexpression, while not affecting the viral replication, promoted both virion egress and entry (~12-fold), the latter possibly via an increase of its receptor occludin. Moreover, HCV infection induces an increase of both ADRP and occludin expression. In HCV infected cells, the occludin upregulation was fully prevented by the ADRP silencing, suggesting a specific, ADRP-dependent mechanism. Finally, in HCV-infected human livers, occludin and ADRP mRNA expression levels correlated with each other. Alltogether, these findings show that HCV induces ADRP, which in turns appears to confer a favorable environment to viral spread.
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Affiliation(s)
- Emilie Branche
- Department of Immunology and Pathology, Faculty of Medicine, Geneva, Switzerland
| | - Stéphanie Conzelmann
- Department of Immunology and Pathology, Faculty of Medicine, Geneva, Switzerland
| | - Clotilde Parisot
- Department of Immunology and Pathology, Faculty of Medicine, Geneva, Switzerland
| | - Ludmila Bedert
- Department of Immunology and Pathology, Faculty of Medicine, Geneva, Switzerland
| | - Pierre L. Lévy
- Department of Immunology and Pathology, Faculty of Medicine, Geneva, Switzerland
| | - Birke Bartosch
- CRCL, INSERM U1052, CNRS 5286, University of Lyon, Lyon, France
| | - Sophie Clément
- Divisions of Clinical Pathology, University Hospital, Geneva, Switzerland
- * E-mail: (FN); (SC)
| | - Francesco Negro
- Divisions of Clinical Pathology, University Hospital, Geneva, Switzerland
- Gastroenterology and Hepatology, University Hospital, Geneva, Switzerland
- * E-mail: (FN); (SC)
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25
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Cottarel J, Plissonnier ML, Kullolli M, Pitteri S, Clément S, Millarte V, Si-Ahmed SN, Farhan H, Zoulim F, Parent R. FIG4 is a hepatitis C virus particle-bound protein implicated in virion morphogenesis and infectivity with cholesteryl ester modulation potential. J Gen Virol 2015; 97:69-81. [PMID: 26519381 DOI: 10.1099/jgv.0.000331] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
There is growing evidence that virus particles also contain host cell proteins, which provide viruses with certain properties required for entry and release. A proteomic analysis performed on double-gradient-purified hepatitis C virus (HCV) from two highly viraemic patients identified the phosphatidylinositol 3,5-bisphosphate 5-phosphatase FIG4 (KIAA0274) as part of the viral particles. We validated the association using immunoelectron microscopy, immunoprecipitation and neutralization assays in vitro as well as patient-derived virus particles. RNA interference-mediated reduction of FIG4 expression decreased cholesteryl ester (CE) levels along with intra- and extracellular viral infectivity without affecting HCV RNA levels. Likewise, overexpressing FIG4 increased intracellular CE levels as well as intra- and extracellular viral infectivity without affecting viral RNA levels. Triglyceride levels and lipid droplet (LD) parameters remained unaffected. The 3,5-bisphosphate 5-phosphatase active site of FIG4 was found to strongly condition these results. Whilst FIG4 was found to localize to areas corresponding to viral assembly sites, at the immediate vicinity of LDs in calnexin-positive and HCV core-positive regions, no implication of FIG4 in the secretory pathway of the hepatocytes could be found using either FIG4-null mice, in vitro morphometry or functional assays of the ERGIC/Golgi compartments. This indicates that FIG4-dependent modulation of HCV infectivity is unrelated to alterations in the functionality of the secretory pathway. As a result of the documented implication of CE in the composition and infectivity of HCV particles, these results suggest that FIG4 binds to HCV and modulates particle formation in a CE-related manner.
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Affiliation(s)
- Jessica Cottarel
- Pathogenesis of Hepatitis B and C - DEVweCAN LabEx, INSERM U1052-CNRS 5286, Centre de Recherche en Cancérologie de Lyon, Université de Lyon, 69008 Lyon, France
| | - Marie-Laure Plissonnier
- Pathogenesis of Hepatitis B and C - DEVweCAN LabEx, INSERM U1052-CNRS 5286, Centre de Recherche en Cancérologie de Lyon, Université de Lyon, 69008 Lyon, France
| | - Majlinda Kullolli
- Canary Center for Cancer Early Detection, Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Sharon Pitteri
- Canary Center for Cancer Early Detection, Department of Radiology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Sophie Clément
- Department of Clinical Pathology, University of Geneva, Geneva, Switzerland
| | | | | | - Hesso Farhan
- Department of Biology, University of Konstanz, Germany.,Hôpital d'Orléans, 45000 Orléans, France
| | - Fabien Zoulim
- Pathogenesis of Hepatitis B and C - DEVweCAN LabEx, INSERM U1052-CNRS 5286, Centre de Recherche en Cancérologie de Lyon, Université de Lyon, 69008 Lyon, France.,Hospices Civils de Lyon, Service d'Hépatogastroentérologie, 69001 Lyon, France
| | - Romain Parent
- Pathogenesis of Hepatitis B and C - DEVweCAN LabEx, INSERM U1052-CNRS 5286, Centre de Recherche en Cancérologie de Lyon, Université de Lyon, 69008 Lyon, France
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26
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Cheng D, Zhang L, Yang G, Zhao L, Peng F, Tian Y, Xiao X, Chung RT, Gong G. Hepatitis C virus NS5A drives a PTEN-PI3K/Akt feedback loop to support cell survival. Liver Int 2015; 35:1682-91. [PMID: 25388655 DOI: 10.1111/liv.12733] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/06/2014] [Indexed: 12/18/2022]
Abstract
BACKGROUND & AIMS Decreased levels of phosphatase and tensin homologue (PTEN) are associated with hepatocellular carcinoma (HCC) pathogenesis and poor prognosis in hepatitis C virus (HCV)-infected HCC patients. The molecular processes governing the reduction in PTEN and outcome of PTEN dysfunction in hepatocytes are poorly understood. METHODS The levels of proteins and mRNA were assessed by real time PCR and immunoblot. PTEN promoter activity was measured by reporter assay. Signalling pathways were perturbed using siRNAs or pharmacological inhibitors. RESULTS Here, we report that HCV down-regulates PTEN expression at the transcriptional level by decreasing its promoter activity, mRNA transcription, and protein levels. We further identify NS5A protein as a key determinant of PTEN reduction among HCV proteins. NS5A-mediated down-regulation of PTEN occurs through a cooperation of reactive oxygen species (ROS)-dependent Nuclear Factor- kappa B (NF-κB) and ROS-independent phosphoinositol-3-kinase (PI3K) pathways. Moreover, NS5A protects cells against apoptosis. In addition, we found that down-regulation of PTEN relieves its inhibitory effect on PI3K-Akt pathway and triggers cumulative activation of Akt. This PTEN-PI3K/Akt feedback network mediates the suppression of cell apoptosis caused by NS5A. CONCLUSIONS These data demonstrate that HCV NS5A down-regulates PTEN expression through a cooperation of ROS-dependent and -independent pathways that subsequently drives a PTEN-PI3K/Akt feedback loop to support cell survival. Our findings provide new insights suggesting that NS5A contributes to HCV-related hepatocarcinogenesis.
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Affiliation(s)
- Du Cheng
- Department of Gastroenterology, Renmin Hospital, Wuhan University, Wuhan, China.,Liver Center, Gastrointestinal Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Liver Diseases Center, Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Leiliang Zhang
- Liver Center, Gastrointestinal Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Guangbo Yang
- MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Lei Zhao
- Liver Center, Gastrointestinal Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Feng Peng
- Liver Diseases Center, Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yi Tian
- Liver Diseases Center, Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xinqiang Xiao
- Liver Diseases Center, Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Raymond T Chung
- Liver Center, Gastrointestinal Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Guozhong Gong
- Liver Diseases Center, Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China
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27
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Loizides-Mangold U, Clément S, Alfonso-Garcia A, Branche E, Conzelmann S, Parisot C, Potma EO, Riezman H, Negro F. HCV 3a core protein increases lipid droplet cholesteryl ester content via a mechanism dependent on sphingolipid biosynthesis. PLoS One 2014; 9:e115309. [PMID: 25522003 PMCID: PMC4270764 DOI: 10.1371/journal.pone.0115309] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 11/21/2014] [Indexed: 12/22/2022] Open
Abstract
Hepatitis C virus (HCV) infected patients often develop steatosis and the HCV core protein alone can induce this phenomenon. To gain new insights into the pathways leading to steatosis, we performed lipidomic profiling of HCV core protein expressing-Huh-7 cells and also assessed the lipid profile of purified lipid droplets isolated from HCV 3a core expressing cells. Cholesteryl esters, ceramides and glycosylceramides, but not triglycerides, increased specifically in cells expressing the steatogenic HCV 3a core protein. Accordingly, inhibitors of cholesteryl ester biosynthesis such as statins and acyl-CoA cholesterol acyl transferase inhibitors prevented the increase of cholesteryl ester production and the formation of large lipid droplets in HCV core 3a-expressing cells. Furthermore, inhibition of de novo sphingolipid biosynthesis by myriocin - but not of glycosphingolipid biosynthesis by miglustat - affected both lipid droplet size and cholesteryl ester level. The lipid profile of purified lipid droplets, isolated from HCV 3a core-expressing cells, confirmed the particular increase of cholesteryl ester. Thus, both sphingolipid and cholesteryl ester biosynthesis are affected by the steatogenic core protein of HCV genotype 3a. These results may explain the peculiar lipid profile of HCV-infected patients with steatosis.
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Affiliation(s)
- Ursula Loizides-Mangold
- Department of Biochemistry, NCCR Chemical Biology, University of Geneva, Geneva, Switzerland
| | - Sophie Clément
- Division of Clinical Pathology, University Hospital, University of Geneva School of Medicine, Geneva, Switzerland
| | - Alba Alfonso-Garcia
- University of California Irvine, Beckman Laser Institute, Irvine, California, United States of America
| | - Emilie Branche
- Division of Clinical Pathology, University Hospital, University of Geneva School of Medicine, Geneva, Switzerland
| | - Stéphanie Conzelmann
- Division of Clinical Pathology, University Hospital, University of Geneva School of Medicine, Geneva, Switzerland
| | - Clotilde Parisot
- Division of Clinical Pathology, University Hospital, University of Geneva School of Medicine, Geneva, Switzerland
| | - Eric O. Potma
- University of California Irvine, Beckman Laser Institute, Irvine, California, United States of America
| | - Howard Riezman
- Department of Biochemistry, NCCR Chemical Biology, University of Geneva, Geneva, Switzerland
| | - Francesco Negro
- Division of Clinical Pathology, University Hospital, University of Geneva School of Medicine, Geneva, Switzerland
- Divisions of Gastroenterology and Hepatology, University Hospital, University of Geneva School of Medicine, Geneva, Switzerland
- * E-mail:
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28
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Read SA, Tay E, Shahidi M, George J, Douglas MW. Hepatitis C virus infection mediates cholesteryl ester synthesis to facilitate infectious particle production. J Gen Virol 2014; 95:1900-1910. [PMID: 24859394 DOI: 10.1099/vir.0.065300-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Abstract
Cholesterol is a critical component of the hepatitis C virus (HCV) life cycle, as demonstrated by its accumulation within infected hepatocytes and lipoviral particles. To cope with excess cholesterol, hepatic enzymes ACAT1 and ACAT2 produce cholesteryl esters (CEs), which are destined for storage in lipid droplets or for secretion as apolipoproteins. Here we demonstrate in vitro that cholesterol accumulation following HCV infection induces upregulation of the ACAT genes and increases CE synthesis. Analysis of human liver biopsy tissue showed increased ACAT2 mRNA expression in liver infected with HCV genotype 3, compared with genotype 1. Inhibiting cholesterol esterification using the potent ACAT inhibitor TMP-153 significantly reduced production of infectious virus, but did not inhibit virus RNA replication. Density gradient analysis showed that TMP-153 treatment caused a significant increase in lipoviral particle density, suggesting reduced lipidation. These data suggest that cholesterol accumulation following HCV infection stimulates the production of CE, a major component of lipoviral particles. Inhibition of CE synthesis reduces HCV particle density and infectivity, suggesting that CEs are required for optimal infection of hepatocytes.
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Affiliation(s)
- Scott A Read
- Storr Liver Unit, Westmead Millennium Institute, University of Sydney and Westmead Hospital, Sydney, Australia
| | - Enoch Tay
- Storr Liver Unit, Westmead Millennium Institute, University of Sydney and Westmead Hospital, Sydney, Australia
| | - Mahsa Shahidi
- Storr Liver Unit, Westmead Millennium Institute, University of Sydney and Westmead Hospital, Sydney, Australia
| | - Jacob George
- Storr Liver Unit, Westmead Millennium Institute, University of Sydney and Westmead Hospital, Sydney, Australia
| | - Mark W Douglas
- Centre for Infectious Diseases and Microbiology, Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney at Westmead Hospital, Sydney, Australia
- Storr Liver Unit, Westmead Millennium Institute, University of Sydney and Westmead Hospital, Sydney, Australia
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29
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Goossens N, Negro F. Is genotype 3 of the hepatitis C virus the new villain? Hepatology 2014; 59:2403-12. [PMID: 24155107 DOI: 10.1002/hep.26905] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 10/18/2013] [Indexed: 12/14/2022]
Abstract
UNLABELLED Genotype 3 of the hepatitis C virus (HCV) has been long considered an easy-to-treat infection, with higher cure rates (∼70%) than other viral genotypes with the standard combination of pegylated interferon-α and ribavirin. However, the relative insensitivity of this genotype to most protease inhibitors and the recent unexpected data on decreased effectiveness of sofosbuvir have raised questions on how to achieve universal cure, a goal that seems reasonable for other genotypes. In addition, increasing clinical and experimental data show that HCV genotype 3 may be associated not only with severe steatosis, but also with accelerated fibrosis progression rate and increased oncogenesis. CONCLUSION Currently available data suggest that we should increase our efforts to understand the virology and pathogenesis of HCV genotype 3, aiming at better and more potent, genotype-targeted treatments.
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Affiliation(s)
- Nicolas Goossens
- Division of Gastroenterology and Hepatology, Geneva University Hospital, Geneva, Switzerland
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30
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Dillon LM, Miller TW. Therapeutic targeting of cancers with loss of PTEN function. Curr Drug Targets 2014; 15:65-79. [PMID: 24387334 PMCID: PMC4310752 DOI: 10.2174/1389450114666140106100909] [Citation(s) in RCA: 173] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 09/30/2013] [Accepted: 11/02/2013] [Indexed: 02/08/2023]
Abstract
Phosphatase and tensin homologue deleted on chromosome 10 (PTEN) is one of the most frequently disrupted tumor suppressors in cancer. The lipid phosphatase activity of PTEN antagonizes the phosphatidylinositol 3-kinase (PI3K)/AKT/mTOR pathway to repress tumor cell growth and survival. In the nucleus, PTEN promotes chromosome stability and DNA repair. Consequently, loss of PTEN function increases genomic instability. PTEN deficiency is caused by inherited germline mutations, somatic mutations, epigenetic and transcriptional silencing, post-translational modifications, and protein-protein interactions. Given the high frequency of PTEN deficiency across cancer subtypes, therapeutic approaches that exploit PTEN loss-of-function could provide effective treatment strategies. Herein, we discuss therapeutic strategies aimed at cancers with loss of PTEN function, and the challenges involved in treating patients afflicted with such cancers. We review preclinical and clinical findings, and highlight novel strategies under development to target PTENdeficient cancers.
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Affiliation(s)
| | - Todd W Miller
- Dartmouth-Hitchcock Medical Center, One Medical Center Dr. HB-7936, Lebanon, NH 03756, USA.
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31
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Clément S, Peyrou M, Foti M, Negro F. Statins May Protect Against Hepatocellular Carcinoma Development in Patients Infected With Hepatitis C Virus, but What Are the Mechanisms? J Clin Oncol 2013; 31:4160-1. [DOI: 10.1200/jco.2013.51.0354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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32
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Tsan YT, Lee CS, Ho WC, Lin MH, Wang JD, Chen PC. Reply to S. Bonovas et al, S. Clément et al, and J.L. Lund et al. J Clin Oncol 2013; 31:4162-4. [DOI: 10.1200/jco.2013.51.7623] [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] Open
Affiliation(s)
- Yu-Tse Tsan
- National Taiwan University College of Public Health, Taipei; Taichung Veterans General Hospital; and Chung Shan Medical University School of Medicine, Taichung, Taiwan
| | - Chang-Sing Lee
- National Taiwan University College of Public Health, Taipei; Ton Yen General Hospital, Hsin-Chu, Taiwan
| | | | | | - Jung-Der Wang
- National Cheng Kung University, College of Medicine and Hospital, Tainan, Taiwan
| | - Pau-Chung Chen
- Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University College of Public Health; and National Taiwan University College of Medicine and Hospital, Taipei, Taiwan
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