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Liang XY, Wang Y, Zhu YW, Zhang YX, Yuan H, Liu YF, Jin YQ, Gao W, Ren ZG, Ji XY, Wu DD. Role of hydrogen sulfide in dermatological diseases. Nitric Oxide 2024:S1089-8603(24)00081-8. [PMID: 38971520 DOI: 10.1016/j.niox.2024.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 06/30/2024] [Accepted: 07/04/2024] [Indexed: 07/08/2024]
Abstract
Hydrogen sulfide (H2S), together with carbon monoxide (CO) and nitric oxide (NO), is recognized as a vital gasotransmitter. H2S is biosynthesized by enzymatic pathways in the skin and exerts significant physiological effects on a variety of biological processes, such as apoptosis, modulation of inflammation, cellular proliferation, and regulation of vasodilation. As a major health problem, dermatological diseases affect a large proportion of the population every day. It is urgent to design and develop effective drugs to deal with dermatological diseases. Dermatological diseases can arise from a multitude of etiologies, including neoplastic growth, infectious agents, and inflammatory processes. The abnormal metabolism of H2S is associated with many dermatological diseases, such as melanoma, fibrotic diseases, and psoriasis, suggesting its therapeutic potential in the treatment of these diseases. In addition, therapies based on H2S donors that release H2S are being developed to treat some of these conditions. In the review, we discuss recent advances in the function of H2S in normal skin, the role of altering H2S metabolism in dermatological diseases, and the therapeutic potential of diverse H2S donors for the treatment of dermatological diseases.
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Affiliation(s)
- Xiao-Yi Liang
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Yan Wang
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Yi-Wen Zhu
- School of Clinical Medicine, Henan University, Kaifeng, Henan 475004, China
| | - Yan-Xia Zhang
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Hang Yuan
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Ya-Fang Liu
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Yu-Qing Jin
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Wei Gao
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China
| | - Zhi-Guang Ren
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China; Kaifeng Key Laboratory of Infectious Diseases and Biosafety, School of Basic Medical Sciences, Henan University, Kaifeng, Henan 475004, China.
| | - Xin-Ying Ji
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China; Kaifeng Key Laboratory of Infectious Diseases and Biosafety, School of Basic Medical Sciences, Henan University, Kaifeng, Henan 475004, China; Faculty of Basic Medical Subjects, Shu-Qing Medical College of Zhengzhou, Zhengzhou, Henan 450064, China.
| | - Dong-Dong Wu
- Henan International Joint Laboratory of Nuclear Protein Regulation, School of Basic Medical Sciences, School of Stomatology, Henan University, Kaifeng, Henan 475004, China; Kaifeng Key Laboratory of Infectious Diseases and Biosafety, School of Basic Medical Sciences, Henan University, Kaifeng, Henan 475004, China; Department of Stomatology, Huaihe Hospital of Henan University, School of Stomatology, Henan University, Kaifeng, Henan 475004, China.
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Khalfi P, Suspène R, Raymond KA, Caval V, Caignard G, Berry N, Thiers V, Combredet C, Rufie C, Rigaud S, Ghozlane A, Volant S, Komarova AV, Tangy F, Vartanian JP. Antagonism of ALAS1 by the Measles Virus V protein contributes to degradation of the mitochondrial network and promotes interferon response. PLoS Pathog 2023; 19:e1011170. [PMID: 36802406 PMCID: PMC9983871 DOI: 10.1371/journal.ppat.1011170] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 03/03/2023] [Accepted: 02/01/2023] [Indexed: 02/23/2023] Open
Abstract
Viruses have evolved countless mechanisms to subvert and impair the host innate immune response. Measles virus (MeV), an enveloped, non-segmented, negative-strand RNA virus, alters the interferon response through different mechanisms, yet no viral protein has been described as directly targeting mitochondria. Among the crucial mitochondrial enzymes, 5'-aminolevulinate synthase (ALAS) is an enzyme that catalyzes the first step in heme biosynthesis, generating 5'-aminolevulinate from glycine and succinyl-CoA. In this work, we demonstrate that MeV impairs the mitochondrial network through the V protein, which antagonizes the mitochondrial enzyme ALAS1 and sequesters it to the cytosol. This re-localization of ALAS1 leads to a decrease in mitochondrial volume and impairment of its metabolic potential, a phenomenon not observed in MeV deficient for the V gene. This perturbation of the mitochondrial dynamics demonstrated both in culture and in infected IFNAR-/- hCD46 transgenic mice, causes the release of mitochondrial double-stranded DNA (mtDNA) in the cytosol. By performing subcellular fractionation post infection, we demonstrate that the most significant source of DNA in the cytosol is of mitochondrial origin. Released mtDNA is then recognized and transcribed by the DNA-dependent RNA polymerase III. The resulting double-stranded RNA intermediates will be captured by RIG-I, ultimately initiating type I interferon production. Deep sequencing analysis of cytosolic mtDNA editing divulged an APOBEC3A signature, primarily analyzed in the 5'TpCpG context. Finally, in a negative feedback loop, APOBEC3A an interferon inducible enzyme will orchestrate the catabolism of mitochondrial DNA, decrease cellular inflammation, and dampen the innate immune response.
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Affiliation(s)
- Pierre Khalfi
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
- Sorbonne Université, Complexité du Vivant, ED515, Paris, France
| | - Rodolphe Suspène
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Kyle A. Raymond
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
- Sorbonne Université, Complexité du Vivant, ED515, Paris, France
| | - Vincent Caval
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
| | | | - Noémie Berry
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
- Sorbonne Université, Complexité du Vivant, ED515, Paris, France
- UMR1161 Virologie, ANSES-INRAE-ENVA, Maisons-Alfort, France
| | - Valérie Thiers
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Chantal Combredet
- Vaccines Innovation Laboratory, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Claude Rufie
- Vaccines Innovation Laboratory, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Stéphane Rigaud
- Image Analysis Hub, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Amine Ghozlane
- Bioinformatics and Biostatistics HUB, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Stevenn Volant
- Bioinformatics and Biostatistics HUB, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Anastassia V. Komarova
- Interactomics, RNA and Immunity Laboratory, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Frédéric Tangy
- Vaccines Innovation Laboratory, Institut Pasteur, Université de Paris Cité, Paris, France
| | - Jean-Pierre Vartanian
- Virus and Cellular Stress Unit, Department of Virology, Institut Pasteur, Université de Paris Cité, Paris, France
- * E-mail:
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Berry N, Suspène R, Caval V, Khalfi P, Beauclair G, Rigaud S, Blanc H, Vignuzzi M, Wain-Hobson S, Vartanian JP. Herpes Simplex Virus Type 1 Infection Disturbs the Mitochondrial Network, Leading to Type I Interferon Production through the RNA Polymerase III/RIG-I Pathway. mBio 2021; 12:e0255721. [PMID: 34809467 PMCID: PMC8609356 DOI: 10.1128/mbio.02557-21] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/19/2021] [Indexed: 11/20/2022] Open
Abstract
Viruses have evolved a plethora of mechanisms to impair host innate immune responses. Herpes simplex virus type 1 (HSV-1), a double-stranded linear DNA virus, impairs the mitochondrial network and dynamics predominantly through the UL12.5 gene. We demonstrated that HSV-1 infection induced a remodeling of mitochondrial shape, resulting in a fragmentation of the mitochondria associated with a decrease in their volume and an increase in their sphericity. This damage leads to the release of mitochondrial DNA (mtDNA) to the cytosol. By generating a stable THP-1 cell line expressing the DNase I-mCherry fusion protein and a THP-1 cell line specifically depleted of mtDNA upon ethidium bromide treatment, we showed that cytosolic mtDNA contributes to type I interferon and APOBEC3A upregulation. This was confirmed by using an HSV-1 strain (KOS37 UL98-SPA) with a deletion of the UL12.5 gene that impaired its ability to induce mtDNA stress. Furthermore, by using an inhibitor of RNA polymerase III, we demonstrated that upon HSV-1 infection, cytosolic mtDNA enhanced type I interferon induction through the RNA polymerase III/RIG-I pathway. APOBEC3A was in turn induced by interferon. Deep sequencing analyses of cytosolic mtDNA mutations revealed an APOBEC3A signature predominantly in the 5'TpCpG context. These data demonstrate that upon HSV-1 infection, the mitochondrial network is disrupted, leading to the release of mtDNA and ultimately to its catabolism through APOBEC3-induced mutations. IMPORTANCE Herpes simplex virus 1 (HSV-1) impairs the mitochondrial network through the viral protein UL12.5. This leads to the fusion of mitochondria and simultaneous release of mitochondrial DNA (mtDNA) in a mouse model. We have shown that released mtDNA is recognized as a danger signal, capable of stimulating signaling pathways and inducing the production of proinflammatory cytokines. The expression of the human cytidine deaminase APOBEC3A is highly upregulated by interferon responses. This enzyme catalyzes the deamination of cytidine to uridine in single-stranded DNA substrates, resulting in the catabolism of edited DNA. Using human cell lines deprived of mtDNA and viral strains deficient in UL12, we demonstrated the implication of mtDNA in the production of interferon and APOBEC3A expression during viral infection. We have shown that HSV-1 induces mitochondrial network fragmentation in a human model and confirmed the implication of RNA polymerase III/RIG-I signaling in the capture of cytosolic mtDNA.
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Affiliation(s)
- Noémie Berry
- Molecular Retrovirology Unit, Institut Pasteur, Paris, France
- Sorbonne Université, Complexité du Vivant, Paris, France
| | | | - Vincent Caval
- Molecular Retrovirology Unit, Institut Pasteur, Paris, France
| | - Pierre Khalfi
- Molecular Retrovirology Unit, Institut Pasteur, Paris, France
- Sorbonne Université, Complexité du Vivant, Paris, France
| | | | | | - Hervé Blanc
- Viral Populations and Pathogenesis Unit, Institut Pasteur, CNRS UMR 3569, Paris, France
| | - Marco Vignuzzi
- Viral Populations and Pathogenesis Unit, Institut Pasteur, CNRS UMR 3569, Paris, France
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Sander WJ, Fourie C, Sabiu S, O'Neill FH, Pohl CH, O'Neill HG. Reactive oxygen species as potential antiviral targets. Rev Med Virol 2021; 32:e2240. [PMID: 33949029 DOI: 10.1002/rmv.2240] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Indexed: 12/14/2022]
Abstract
Reactive oxygen species (ROS) are by-products of cellular metabolism and can be either beneficial, at low levels, or deleterious, at high levels, to the cell. It is known that several viral infections can increase oxidative stress, which is mainly facilitated by viral-induced imbalances in the antioxidant defence mechanisms of the cell. While the exact role of ROS in certain viral infections (adenovirus and dengue virus) remains unknown, other viruses can use ROS for enhancement of pathogenesis (SARS coronavirus and rabies virus) or replication (rhinovirus, West Nile virus and vesicular stomatitis virus) or both (hepatitis C virus, human immunodeficiency virus and influenza virus). While several viral proteins (mainly for hepatitis C and human immunodeficiency virus) have been identified to play a role in ROS formation, most mediators of viral ROS modulation are yet to be elucidated. Treatment of viral infections, including hepatitis C virus, human immunodeficiency virus and influenza virus, with ROS inhibitors has shown a decrease in both pathogenesis and viral replication both in vitro and in animal models. Clinical studies indicating the potential for targeting ROS-producing pathways as possible broad-spectrum antiviral targets should be evaluated in randomized controlled trials.
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Affiliation(s)
- Willem J Sander
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa
| | - Corinne Fourie
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa
| | - Saheed Sabiu
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa.,Department of Biotechnology and Food Science, Durban University of Technology, Durban, South Africa
| | - Frans H O'Neill
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa
| | - Carolina H Pohl
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa
| | - Hester G O'Neill
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa
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Hydrogen Sulfide in Skin Diseases: A Novel Mediator and Therapeutic Target. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6652086. [PMID: 33986916 PMCID: PMC8079204 DOI: 10.1155/2021/6652086] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/25/2021] [Accepted: 04/07/2021] [Indexed: 02/05/2023]
Abstract
Together with nitric oxide (NO) and carbon monoxide (CO), hydrogen sulfide (H2S) is now recognized as a vital gaseous transmitter. The ubiquitous distributions of H2S-producing enzymes and potent chemical reactivities of H2S in biological systems make H2S unique in its ability to regulate cellular and organ functions in both health and disease. Acting as an antioxidant, H2S can combat oxidative species such as reactive oxygen species (ROS) and reactive nitrogen species (RNS) and protect the skin from oxidative stress. The aberrant metabolism of H2S is involved in the pathogenesis of several skin diseases, such as vascular disorders, psoriasis, ulcers, pigment disorders, and melanoma. Furthermore, H2S donors and some H2S hybrids have been evaluated in many experimental models of human disease and have shown promising therapeutic results. In this review, we discuss recent advances in understanding H2S and its antioxidant effects on skin pathology, the roles of altered H2S metabolism in skin disorders, and the potential value of H2S as a therapeutic intervention in skin diseases.
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Chattopadhyay P, Srinivasa Vasudevan J, Pandey R. Noncoding RNAs: modulators and modulatable players during infection-induced stress response. Brief Funct Genomics 2021; 20:28-41. [PMID: 33491070 PMCID: PMC7929421 DOI: 10.1093/bfgp/elaa026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 12/16/2022] Open
Abstract
The human genome has an almost equal distribution of unique and transposable genetic elements. Although at the transcriptome level, a relatively higher contribution from transposable elements derived RNA has been reported. This is further highlighted with evidence from pervasive transcription. Of the total RNA, noncoding RNAs (ncRNAs) are significant contributors to the transcriptome pool with sizeable fraction from repetitive elements of the human genome, inclusive of Long Interspersed Nuclear Elements (LINEs) and Short Interspersed Nuclear Elements (SINEs). ncRNAs are increasingly being implicated in diverse functional roles especially during conditions of stress. These stress responses are driven through diverse mediators, inclusive of long and short ncRNAs. ncRNAs such as MALAT1, GAS5, miR-204 and miR-199a-5p have been functionally involved during oxidative stress, endoplasmic reticulum (ER) stress and unfolded protein response (UPR). Also, within SINEs, Alu RNAs derived from primate-specific Alu repeats with ~11% human genome contribution, playing a significant role. Pathogenic diseases, including the recent COVID-19, leads to differential regulation of ncRNAs. Although, limited evidence suggests the need for an inquest into the role of ncRNAs in determining the host response towards pathogen challenge.
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Affiliation(s)
| | | | - Rajesh Pandey
- Corresponding author: Rajesh Pandey, INtegrative GENomics of HOst-PathogEn (INGEN-HOPE) laboratory. CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), North Campus, Near Jubilee Hall, Mall Road, Delhi-110007, India. Tel.: +91 9811029551; E-mail:
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Dash S, Aydin Y, Wu T. Integrated stress response in hepatitis C promotes Nrf2-related chaperone-mediated autophagy: A novel mechanism for host-microbe survival and HCC development in liver cirrhosis. Semin Cell Dev Biol 2020; 101:20-35. [PMID: 31386899 PMCID: PMC7007355 DOI: 10.1016/j.semcdb.2019.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/26/2019] [Accepted: 07/30/2019] [Indexed: 02/06/2023]
Abstract
The molecular mechanism(s) how liver damage during the chronic hepatitis C virus (HCV) infection evolve into cirrhosis and hepatocellular carcinoma (HCC) is unclear. HCV infects hepatocyte, the major cell types in the liver. During infection, large amounts of viral proteins and RNA replication intermediates accumulate in the endoplasmic reticulum (ER) of the infected hepatocyte, which creates a substantial amount of stress response. Infected hepatocyte activates a different type of stress adaptive mechanisms such as unfolded protein response (UPR), antioxidant response (AR), and the integrated stress response (ISR) to promote virus-host cell survival. The hepatic stress is also amplified by another layer of innate and inflammatory response associated with cellular sensing of virus infection through the production of interferon (IFN) and inflammatory cytokines. The interplay between various types of cellular stress signal leads to different forms of cell death such as apoptosis, necrosis, and autophagy depending on the intensity of the stress and nature of the adaptive cellular response. How do the adaptive cellular responses decode such death programs that promote host-microbe survival leading to the establishment of chronic liver disease? In this review, we discuss how the adaptive cellular response through the Nrf2 pathway that promotes virus and cell survival. Furthermore, we provide a glimpse of novel stress-induced Nrf2 mediated compensatory autophagy mechanisms in virus-cell survival that degrade tumor suppressor gene and activation of oncogenic signaling during HCV infection. Based on these facts, we hypothesize that the balance between hepatic stress, inflammation and different types of cell death determines liver disease progression outcomes. We propose that a more nuanced understanding of virus-host interactions under excessive cellular stress may provide an answer to the fundamental questions why some individuals with chronic HCV infection remain at risk of developing cirrhosis, cancer and some do not.
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Affiliation(s)
- Srikanta Dash
- Department of Pathology and Laboratory Medicine, Tulane University Health Sciences Center, New Orleans, LA, 70112, USA.
| | - Yucel Aydin
- Department of Pathology and Laboratory Medicine, Tulane University Health Sciences Center, New Orleans, LA, 70112, USA
| | - Tong Wu
- Department of Pathology and Laboratory Medicine, Tulane University Health Sciences Center, New Orleans, LA, 70112, USA
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Zhang Q, Mohammed EAH, Wang Y, Bai Z, Zhao Q, He D, Wang Z. Synthesis and anti-hepaticfibrosis of glycyrrhetinic acid derivatives with inhibiting COX-2. Bioorg Chem 2020; 99:103804. [PMID: 32272365 DOI: 10.1016/j.bioorg.2020.103804] [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: 01/11/2020] [Revised: 02/24/2020] [Accepted: 03/27/2020] [Indexed: 02/08/2023]
Abstract
Many tests have shown cyclooxygenase-2 (COX-2) was closely related to the activation of hepatic stellate cells (HSCs), which further promoting the onset and development of hepatic fibrosis. According to these research findings, a series of glycyrrhetinic acid derivatives were designed and synthesized. Meanwhile, their anti-hepaticfibrotic activities were evaluated in vitro and in vivo. Firstly, in the tests of the cell models, all the compounds displayed anti-proliferative effect on the HSC-T6 activated by (transforming growth factor beta) TGF-β1 (10 ng/mL). Among them, compounds 2 and 16 exhibited a stronger activity than the others, and their IC50 values were 17.6 µM and 30.3 µM, respectively; both of them were low toxicity to normal HSC-T6 cells and WI38 cells, and they inhibited the activated HSC-T6 cells proliferation by promoting apoptosis and resting them at the G0/G1 phase. Secondly, compounds 2 and 16 displayed strong inhibitory effect on activation of HSCs; they not only inhibited the expression of α-SMA and Col1 in the activated HSC-T6 cells, but also decreased the levels of COX-2, TGF-β1 and (reactive oxygen species) ROS in a concentration-dependent manner; they down-regulated the levels of three biomarkers in the process of test, but this decrease did not change linearly with the action time of compound. Thirdly, for the rats which induced with (carbontetrachloride) CCl4, the symptoms of liver fibrosis in rats were significantly alleviated after successive administration the tested compound for 14d; the α-SMA level in liver tissue decreased in a concentration dependent manner; and the liver cell necrosis and the fat collagen fiber decreased significantly compared with the positive control group; furthermore, inflammatory infiltration was significantly lower than that of the control. This suggests the compounds possibly are candidates for hepatic fibrosis with promising application in clinic.
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Affiliation(s)
- Qiuping Zhang
- Institute of Medicinal Chemistry, School of Pharmacy of Lanzhou University, Lanzhou 730000, China
| | | | - Yanni Wang
- Institute of Medicinal Chemistry, School of Pharmacy of Lanzhou University, Lanzhou 730000, China
| | - Zhongjie Bai
- Institute of Medicinal Chemistry, School of Pharmacy of Lanzhou University, Lanzhou 730000, China
| | - Quanyi Zhao
- Institute of Medicinal Chemistry, School of Pharmacy of Lanzhou University, Lanzhou 730000, China.
| | - Dian He
- Institute of Medicinal Chemistry, School of Pharmacy of Lanzhou University, Lanzhou 730000, China
| | - Zhen Wang
- Institute of Medicinal Chemistry, School of Pharmacy of Lanzhou University, Lanzhou 730000, China
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Bender D, Hildt E. Effect of Hepatitis Viruses on the Nrf2/Keap1-Signaling Pathway and Its Impact on Viral Replication and Pathogenesis. Int J Mol Sci 2019; 20:ijms20184659. [PMID: 31546975 PMCID: PMC6769940 DOI: 10.3390/ijms20184659] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 09/16/2019] [Accepted: 09/17/2019] [Indexed: 12/15/2022] Open
Abstract
With respect to their genome and their structure, the human hepatitis B virus (HBV) and hepatitis C virus (HCV) are complete different viruses. However, both viruses can cause an acute and chronic infection of the liver that is associated with liver inflammation (hepatitis). For both viruses chronic infection can lead to fibrosis, cirrhosis and hepatocellular carcinoma (HCC). Reactive oxygen species (ROS) play a central role in a variety of chronic inflammatory diseases. In light of this, this review summarizes the impact of both viruses on ROS-generating and ROS-inactivating mechanisms. The focus is on the effect of both viruses on the transcription factor Nrf2 (nuclear factor erythroid 2 (NF-E2)-related factor 2). By binding to its target sequence, the antioxidant response element (ARE), Nrf2 triggers the expression of a variety of cytoprotective genes including ROS-detoxifying enzymes. The review summarizes the literature about the pathways for the modulation of Nrf2 that are deregulated by HBV and HCV and describes the impact of Nrf2 deregulation on the viral life cycle of the respective viruses and the virus-associated pathogenesis.
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Affiliation(s)
- Daniela Bender
- Department of Virology, Paul-Ehrlich-Institut, Paul-Ehrlich-Straβe 51-59, D-63225 Langen, Germany.
| | - Eberhard Hildt
- Department of Virology, Paul-Ehrlich-Institut, Paul-Ehrlich-Straβe 51-59, D-63225 Langen, Germany.
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Flaviviridae Viruses and Oxidative Stress: Implications for Viral Pathogenesis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1409582. [PMID: 31531178 PMCID: PMC6720866 DOI: 10.1155/2019/1409582] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/09/2019] [Accepted: 07/25/2019] [Indexed: 02/07/2023]
Abstract
Oxidative stress is induced once the balance of generation and neutralization of reactive oxygen species (ROS) is broken in the cell, and it plays crucial roles in a variety of natural and diseased processes. Infections of Flaviviridae viruses trigger oxidative stress, which affects both the cellular metabolism and the life cycle of the viruses. Oxidative stress associated with specific viral proteins, experimental culture systems, and patient infections, as well as its correlations with the viral pathogenesis attracts much research attention. In this review, we primarily focus on hepatitis C virus (HCV), dengue virus (DENV), Zika virus (ZIKV), Japanese encephalitis virus (JEV), West Nile virus (WNV), and tick-borne encephalitis virus (TBEV) as representatives of Flaviviridae viruses and we summarize the mechanisms involved in the relevance of oxidative stress for virus-associated pathogenesis. We discuss the current understanding of the pathogenic mechanisms of oxidative stress induced by Flaviviridae viruses and highlight the relevance of autophagy and DNA damage in the life cycle of viruses. Understanding the crosstalk between viral infection and oxidative stress-induced molecular events may offer new avenues for antiviral therapeutics.
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11
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Kong M, Chen X, Lv F, Ren H, Fan Z, Qin H, Yu L, Shi X, Xu Y. Serum response factor (SRF) promotes ROS generation and hepatic stellate cell activation by epigenetically stimulating NCF1/2 transcription. Redox Biol 2019; 26:101302. [PMID: 31442911 PMCID: PMC6831835 DOI: 10.1016/j.redox.2019.101302] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/13/2019] [Accepted: 08/15/2019] [Indexed: 12/25/2022] Open
Abstract
Activation of hepatic stellate cells (HSC) is a hallmark event in liver fibrosis. Accumulation of reactive oxygen species (ROS) serves as a driving force for HSC activation. The regulatory subunits of the NOX complex, NCF1 (p47phox) and NCF2 (p67phox), are up-regulated during HSC activation contributing to ROS production and liver fibrosis. The transcriptional mechanism underlying NCF1/2 up-regulation is not clear. In the present study we investigated the role of serum response factor (SRF) in HSC activation focusing on the transcriptional regulation of NCF1/2. We report that compared to wild type littermates HSC-conditional SRF knockout (CKO) mice exhibited a mortified phenotype of liver fibrosis induced by thioacetamide (TAA) injection or feeding with a methionine-and-choline deficient diet (MCD). More importantly, SRF deletion attenuated ROS levels in HSCs in vivo. Similarly, SRF knockdown in cultured HSCs suppressed ROS production in vitro. Further analysis revealed that SRF deficiency resulted in repression of NCF1/NCF2 expression. Mechanistically, SRF regulated epigenetic transcriptional activation of NCF1/NCF2 by interacting with and recruiting the histone acetyltransferase KAT8 during HSC activation. In conclusion, we propose that SRF integrates transcriptional activation of NCF1/NCF2 and ROS production to promote liver fibrosis.
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Affiliation(s)
- Ming Kong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Xuyang Chen
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Fangqiao Lv
- Department of Cell Biology and the Municipal Laboratory of Liver Protection and Regulation of Regeneration, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Haozhen Ren
- Department of Hepato-biliary Surgery and Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhiwen Fan
- Department of Hepato-biliary Surgery and Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Hao Qin
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Liming Yu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Xiaolei Shi
- Department of Hepato-biliary Surgery and Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China; Institute of Biomedical Research, Liaocheng University, Liaocheng, China.
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12
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Chen WC, Wei CK, Lee JC. MicroRNA-let-7c suppresses hepatitis C virus replication by targeting Bach1 for induction of haem oxygenase-1 expression. J Viral Hepat 2019; 26:655-665. [PMID: 30706605 DOI: 10.1111/jvh.13072] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 12/17/2018] [Accepted: 01/05/2019] [Indexed: 12/26/2022]
Abstract
MicroRNAs are small noncoding RNAs that are central factors between hepatitis C virus (HCV) and host cellular factors for viral replication and liver disease progression, including liver fibrosis, cirrhosis and hepatocellular carcinoma. In the present study, we found that overexpressing miR-let-7c markedly reduced HCV replication because it induced haem oxygenase-1 (HO-1) expression by targeting HO-1 transcriptional repressor Bach1, ultimately leading to stimulating an antiviral interferon response and blockade of HCV viral protease activity. In contrast, the antiviral actions of miR-let-7c were attenuated by miR-let-7c inhibitor treatment, exogenously expressing Bach1 or suppressing HO-1 activity and expression. A proposed model indicates a key role for miR-let-7c targeting Bach1 to transactivate HO-1-mediated antiviral actions against HCV. miR-let-7c may serve as an attractive target for antiviral development.
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Affiliation(s)
- Wei-Chun Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Ku Wei
- Department of Biotechnology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jin-Ching Lee
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Biotechnology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan.,PhD Program in Life Sciences, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
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13
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Hino K, Nishina S, Sasaki K, Hara Y. Mitochondrial damage and iron metabolic dysregulation in hepatitis C virus infection. Free Radic Biol Med 2019; 133:193-199. [PMID: 30268888 DOI: 10.1016/j.freeradbiomed.2018.09.044] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 02/06/2023]
Abstract
Hepatitis C virus (HCV) infection often leads to chronic hepatitis that can progress to liver cirrhosis and hepatocellular carcinoma (HCC). Although HCV infection is expected to decrease due to the high rate of HCV eradication via the rapid dissemination and use of directly acting antivirals, HCV infection remains a leading cause of HCC. Although the mechanisms underlying the HCC development are not fully understood, oxidative stress is present to a greater degree in HCV infection than in other inflammatory liver diseases and has been proposed as a major mechanism of liver injury in patients with chronic hepatitis C. Hepatocellular mitochondrial alterations and iron accumulation are well-known characteristics in patients with chronic hepatitis C and are closely related to oxidative stress, since the mitochondria are the main site of reactive oxygen species generation, and iron produces hydroxy radicals via the Fenton reaction. In addition, phlebotomy is an iron reduction approach that aims to lower serum transaminase levels in patients with chronic hepatitis C. Here, we review and discuss the mechanisms by which HCV induces mitochondrial damage and iron accumulation in the liver and offer new insights concerning how mitochondrial damage and iron accumulation are linked to the development of HCC.
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Affiliation(s)
- Keisuke Hino
- Department of Hepatology and Pancreatology, Kawasaki Medical School, 577 Matsushima Kurashiki, Okayama 701-0192, Japan.
| | - Sohij Nishina
- Department of Hepatology and Pancreatology, Kawasaki Medical School, 577 Matsushima Kurashiki, Okayama 701-0192, Japan.
| | - Kyo Sasaki
- Department of Hepatology and Pancreatology, Kawasaki Medical School, 577 Matsushima Kurashiki, Okayama 701-0192, Japan.
| | - Yuichi Hara
- Department of Hepatology and Pancreatology, Kawasaki Medical School, 577 Matsushima Kurashiki, Okayama 701-0192, Japan.
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14
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Mansouri A, Gattolliat CH, Asselah T. Mitochondrial Dysfunction and Signaling in Chronic Liver Diseases. Gastroenterology 2018; 155:629-647. [PMID: 30012333 DOI: 10.1053/j.gastro.2018.06.083] [Citation(s) in RCA: 446] [Impact Index Per Article: 74.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 05/23/2018] [Accepted: 06/10/2018] [Indexed: 12/12/2022]
Abstract
Mitochondria regulate hepatic lipid metabolism and oxidative stress. Ultrastructural mitochondrial lesions, altered mitochondrial dynamics, decreased activity of respiratory chain complexes, and impaired ability to synthesize adenosine triphosphate are observed in liver tissues from patients with alcohol-associated and non-associated liver diseases. Increased lipogenesis with decreased fatty acid β-oxidation leads to the accumulation of triglycerides in hepatocytes, which, combined with increased levels of reactive oxygen species, contributes to insulin resistance in patients with steatohepatitis. Moreover, mitochondrial reactive oxygen species mediate metabolic pathway signaling; alterations in these pathways affect development and progression of chronic liver diseases. Mitochondrial stress and lesions promote cell death, liver fibrogenesis, inflammation, and the innate immune responses to viral infections. We review the involvement of mitochondrial processes in development of chronic liver diseases, such as nonalcoholic fatty, alcohol-associated, and drug-associated liver diseases, as well as hepatitis B and C, and discuss how they might be targeted therapeutically.
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Affiliation(s)
- Abdellah Mansouri
- Centre de Recherche sur l'Inflammation, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149, Université Paris Diderot, PRES Paris Sorbonne Cité, Paris, France
| | - Charles-Henry Gattolliat
- Centre de Recherche sur l'Inflammation, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149, Université Paris Diderot, PRES Paris Sorbonne Cité, Paris, France
| | - Tarik Asselah
- Centre de Recherche sur l'Inflammation, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149, Université Paris Diderot, PRES Paris Sorbonne Cité, Paris, France; Department of Hepatology, Assistance Publique-Hôpitaux de Paris, Hôpital Beaujon, Clichy, France.
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15
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Morozov VA, Lagaye S. Hepatitis C virus: Morphogenesis, infection and therapy. World J Hepatol 2018; 10:186-212. [PMID: 29527256 PMCID: PMC5838439 DOI: 10.4254/wjh.v10.i2.186] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/11/2018] [Accepted: 02/07/2018] [Indexed: 02/06/2023] Open
Abstract
Hepatitis C virus (HCV) is a major cause of liver diseases including liver cirrhosis and hepatocellular carcinoma. Approximately 3% of the world population is infected with HCV. Thus, HCV infection is considered a public healthy challenge. It is worth mentioning, that the HCV prevalence is dependent on the countries with infection rates around 20% in high endemic countries. The review summarizes recent data on HCV molecular biology, the physiopathology of infection (immune-mediated liver damage, liver fibrosis and lipid metabolism), virus diagnostic and treatment. In addition, currently available in vitro, ex vivo and animal models to study the virus life cycle, virus pathogenesis and therapy are described. Understanding of both host and viral factors may in the future lead to creation of new approaches in generation of an efficient therapeutic vaccine.
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Affiliation(s)
- Vladimir Alexei Morozov
- Center for HIV and Retrovirology, Department of Infectious Diseases, Robert Koch Institute, Berlin 13353, Germany
| | - Sylvie Lagaye
- Department of Immunology, Institut Pasteur, INSERM U1223, Paris 75015, France
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16
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Oxidative stress, a trigger of hepatitis C and B virus-induced liver carcinogenesis. Oncotarget 2018; 8:3895-3932. [PMID: 27965466 PMCID: PMC5354803 DOI: 10.18632/oncotarget.13904] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/05/2016] [Indexed: 12/11/2022] Open
Abstract
Virally induced liver cancer usually evolves over long periods of time in the context of a strongly oxidative microenvironment, characterized by chronic liver inflammation and regeneration processes. They ultimately lead to oncogenic mutations in many cellular signaling cascades that drive cell growth and proliferation. Oxidative stress, induced by hepatitis viruses, therefore is one of the factors that drives the neoplastic transformation process in the liver. This review summarizes current knowledge on oxidative stress and oxidative stress responses induced by human hepatitis B and C viruses. It focuses on the molecular mechanisms by which these viruses activate cellular enzymes/systems that generate or scavenge reactive oxygen species (ROS) and control cellular redox homeostasis. The impact of an altered cellular redox homeostasis on the initiation and establishment of chronic viral infection, as well as on the course and outcome of liver fibrosis and hepatocarcinogenesis will be discussed The review neither discusses reactive nitrogen species, although their metabolism is interferes with that of ROS, nor antioxidants as potential therapeutic remedies against viral infections, both subjects meriting an independent review.
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17
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Zhou F, Wang A, Li D, Wang Y, Lin L. Pinocembrin from Penthorum chinense Pursh suppresses hepatic stellate cells activation through a unified SIRT3-TGF-β-Smad signaling pathway. Toxicol Appl Pharmacol 2018; 341:38-50. [DOI: 10.1016/j.taap.2018.01.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/03/2018] [Accepted: 01/13/2018] [Indexed: 01/18/2023]
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18
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Megamitochondria formation in hepatocytes of patient with chronic hepatitis C - a case report. Clin Exp Hepatol 2017; 3:169-175. [PMID: 29062908 PMCID: PMC5649480 DOI: 10.5114/ceh.2017.68287] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 05/14/2017] [Indexed: 12/27/2022] Open
Abstract
Although chronic hepatitis C virus (HCV) infection affect 185 million people world-wide, pathomechanism of liver damage is still unclear. Electron microscopy can reveal liver injury in very early stage and help understanding the mechanisms that is crucial in the pathogenesis of chronic hepatitis C. We present the morphological changes in the liver of HCV infected 24-year-old female patient, using light and transmission electron microscopy. Examination by TEM revealed wide range of specific subcellular abnormalities in hepatocellular ultrastructure. The most common observed changes were ring-shaped nuclei with intranuclear inclusion, megamitochondria, and “membranous web” structures – the hallmark of RNA-viruses infection.
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19
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Balmasova IP, Aristanbekova MS, Malova ES, Sepiashvili RI. MECHANISMS OF INTERACTION OF VIRAL CAUSATIVE AGENTS IN PATIENTS CO-INFECTED WITH HUMAN IMMUNODEFICIENCY AND HEPATITIS C VIRUSES. JOURNAL OF MICROBIOLOGY, EPIDEMIOLOGY AND IMMUNOBIOLOGY 2016. [DOI: 10.36233/0372-9311-2016-5-101-109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In patients infected with human immunodeficiency virus (HIV) in 20 - 30% of cases co-infection with hepatitis C virus (HCV) is observed, that is associated with common routes of transmission for these causative agents. The main cause of lethal outcome for co-infected patients is liver damage. Thus, analysis of mechanisms of mutual influence of HIV and HCV under the conditions of co-infection gains special attention, that can be examined from both standpoints of direct inter-molecular interaction of 2 viral causative agents, as well as from the position of their immune-mediated effect. Negative effect of HIV on the course of fibrosis process in liver during HCVinfection is associated with the feature of this virus to cause deep alteration in the immune system by direct damage of CD4+ cells, disruption of mechanisms of immunological memory, suppression of functions of liver fraction of NK and NKT, as well as its ability of co-receptor interaction with hepatocytes and stellate cells, enhancing progress of fibrosis alterations and HCV replication in liver. HCV is also established to effect replication of HIV, stimulate infection of macrophages with this virus. All these events facilitate the rise in lethality during HIV and HCV co-infection.
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20
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Valadão ALC, Aguiar RS, de Arruda LB. Interplay between Inflammation and Cellular Stress Triggered by Flaviviridae Viruses. Front Microbiol 2016; 7:1233. [PMID: 27610098 PMCID: PMC4996823 DOI: 10.3389/fmicb.2016.01233] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 07/25/2016] [Indexed: 12/15/2022] Open
Abstract
The Flaviviridae family comprises several human pathogens, including Dengue, Zika, Yellow Fever, West Nile, Japanese Encephalitis viruses, and Hepatitis C Virus. Those are enveloped, single-stranded positive sense RNA viruses, which replicate mostly in intracellular compartments associated to endoplasmic reticulum (ER) and Golgi complex. Virus replication results in abundant viral RNAs and proteins, which are recognized by cellular mechanisms evolved to prevent virus infection, resulting in inflammation and stress responses. Virus RNA molecules are sensed by Toll-like receptors (TLRs), RIG-I-like receptors (RIG-I and MDA5) and RNA-dependent protein kinases (PKR), inducing the production of inflammatory mediators and interferons. Simultaneously, the synthesis of virus RNA and proteins are distinguished in different compartments such as mitochondria, ER and cytoplasmic granules, triggering intracellular stress pathways, including oxidative stress, unfolded protein response pathway, and stress granules assembly. Here, we review the new findings that connect the inflammatory pathways to cellular stress sensors and the strategies of Flaviviridae members to counteract these cellular mechanisms and escape immune response.
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Affiliation(s)
- Ana L C Valadão
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil
| | - Renato S Aguiar
- Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil
| | - Luciana B de Arruda
- Departamento de Virologia, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil
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21
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Virological Mechanisms in the Coinfection between HIV and HCV. Mediators Inflamm 2015; 2015:320532. [PMID: 26494946 PMCID: PMC4606210 DOI: 10.1155/2015/320532] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 09/01/2015] [Accepted: 09/07/2015] [Indexed: 12/14/2022] Open
Abstract
Due to shared transmission routes, coinfection with Hepatitis C Virus (HCV) is common in patients infected by Human Immunodeficiency Virus (HIV). The immune-pathogenesis of liver disease in HIV/HCV coinfected patients is a multifactorial process. Several studies demonstrated that HIV worsens the course of HCV infection, increasing the risk of cirrhosis and hepatocellular carcinoma. Also, HCV might increase immunological defects due to HIV and risk of comorbidities. A specific cross-talk among HIV and HCV proteins in coinfected patients modulates the natural history, the immune responses, and the life cycle of both viruses. These effects are mediated by immune mechanisms and by a cross-talk between the two viruses which could interfere with host defense mechanisms. In this review, we focus on some virological/immunological mechanisms of the pathogenetic interactions between HIV and HCV in the human host.
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22
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Wang XW, Li WD, Xia JR, Li Z, Cai XG. Small interfering RNA targeting receptor for advanced glycation end products suppresses the generation of proinflammatory cytokines. Exp Ther Med 2015; 10:584-590. [PMID: 26622358 DOI: 10.3892/etm.2015.2569] [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: 06/30/2014] [Accepted: 03/10/2015] [Indexed: 12/17/2022] Open
Abstract
The aim of the present study was to investigate the effect of receptor for advanced glycation end products (RAGE)-specific small interfering (si)RNA on the generation of proinflammatory cytokines in primary rat hepatic stellate cells (HSCs) and hepatic fibrotic (HF) rats. The RAGE-specific siRNA expression vector pAKD-GR126 was constructed, and then transfected into primary rat HSCs. Reverse transcription-quantitative polymerase chain reaction and western blot analyses were conducted to determine the mRNA and protein expression levels, respectively, of RAGE, tumor necrosis factor (TNF)-α and interleukin (IL)-6 in the primary HSCs. In addition, a CCl4-induced Sprague Dawley (SD) rat model of hepatic fibrosis was established, and pAKD-GR126 was injected into the SD rats via the tail vein. Serum TNF-α and IL-6 concentrations were determined using radioimmunoassay. The mRNA and protein expression levels of RAGE (mRNA, F=7.791; protein, F=36.513), TNF-α (mRNA, F=474.568; protein, F=123.500) and IL-6 (mRNA, F=203.463; protein, F=320.555) in the pAKD-GR126-transfected primary HSCs were significantly reduced compared with those in the control and pAKD-NC groups (P<0.05). Serum TNF-α and IL-6 levels in the low-, medium- and high-dose pAKD-GR126 treatment groups were reduced compared with those in the fibrotic model group (TNF-α, F=416.397; IL-6, F=1,716.659; P<0.05). In summary, the RAGE-specific siRNA was able to effectively suppress the generation of the proinflammatory cytokines TNF-α and IL-6 in primary rat HSCs and HF rats.
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Affiliation(s)
- Xiao-Wei Wang
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Wei-Dong Li
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Jin-Rong Xia
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Zhan Li
- Department of Gastroenterology, Langxi Chinese Medicine Hospital, Langxi, Anhui 242100, P.R. China
| | - Xiao-Gang Cai
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu 210009, P.R. China
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Hydrogen Sulfide as a Potential Therapeutic Target in Fibrosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:593407. [PMID: 26078809 PMCID: PMC4442300 DOI: 10.1155/2015/593407] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 11/29/2014] [Indexed: 12/24/2022]
Abstract
Hydrogen sulfide (H2S), produced endogenously by the activation of two major H2S-generating enzymes (cystathionine β-synthase and cystathionine γ-lyase), plays important regulatory roles in different physiologic and pathologic conditions. The abnormal metabolism of H2S is associated with fibrosis pathogenesis, causing damage in structure and function of different organs. A number of in vivo and in vitro studies have shown that both endogenous H2S level and the expressions of H2S-generating enzymes in plasma and tissues are significantly downregulated during fibrosis. Supplement with exogenous H2S mitigates the severity of fibrosis in various experimental animal models. The protective role of H2S in the development of fibrosis is primarily attributed to its antioxidation, antiapoptosis, anti-inflammation, proangiogenesis, and inhibition of fibroblasts activities. Future studies might focus on the potential to intervene fibrosis by targeting the pathway of endogenous H2S-producing enzymes and H2S itself.
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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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25
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Mekky RY, El-Ekiaby NM, Hamza MT, Elemam NM, El-Sayed M, Esmat G, Abdelaziz AI. Mir-194 is a hepatocyte gate keeper hindering HCV entry through targeting CD81 receptor. J Infect 2014; 70:78-87. [PMID: 25218426 DOI: 10.1016/j.jinf.2014.08.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/28/2014] [Accepted: 08/31/2014] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The tetraspanin CD81 is one of the main receptors involved in hepatitis C virus entry. Herein, we aimed to explore the role of microRNAs in regulating CD81 receptor expression and function. PATIENTS AND METHODS Bioinformatics analysis was carried out to select potential mircroRNAs that binds CD81 3'untranslated region. Liver biopsies taken from 28 HCV genotype- 4 patients and 10 healthy donors were screened. Naïve, JFH1 and ED43/JFH1- infected- Huh7 cells were transfected with mimics and inhibitors followed by analyzing CD81 protein and mRNA expression. This was done using flow cytometry and Q-RT PCR, respectively. HCV entry into Huh7 cells was investigated post-transfection. Binding confirmation was done using luciferase reporter vector harboring wild/mutant target sites of microRNA. The impact of Epigallocatechin-gallate on modulating microRNA/CD81 expression was assessed. RESULTS Bioinformatics revealed that CD81 is a potential down-stream target for miR-194. A significant inverse correlation was found between miR-194 and CD81 expression in liver biopsies of HCV patients. Forcing the expression of miR-194 showed a down-regulation of CD81 protein, mRNA expression and significantly abrogated the HCV infectivity of Huh7 cells. Stimulation with EGCG enhanced mir-194 expression and down-regulated CD81 expression. CONCLUSION This study showed that mir-194 hinders HCV entry through targeting CD81 receptors.
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Affiliation(s)
- Radwa Yehia Mekky
- The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, German University in Cairo, New Cairo City, Main Entrance Al Tagamoa Al Khames, 11835, Cairo, Egypt
| | - Nada Magdy El-Ekiaby
- The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, German University in Cairo, New Cairo City, Main Entrance Al Tagamoa Al Khames, 11835, Cairo, Egypt
| | - Mohammed Tarif Hamza
- Department of Clinical Pathology, Ain Shams University, Khalifa El-Maamon St, Abbasiya square, 11566, Cairo, Egypt
| | - Noha Mousaad Elemam
- The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, German University in Cairo, New Cairo City, Main Entrance Al Tagamoa Al Khames, 11835, Cairo, Egypt
| | - Mohammed El-Sayed
- Department of Tropical Medicine and Hepatology, Cairo University Kasr El-Aini St, Cairo, Egypt
| | - Gamal Esmat
- Department of Tropical Medicine and Hepatology, Cairo University Kasr El-Aini St, Cairo, Egypt
| | - Ahmed Ihab Abdelaziz
- The Molecular Pathology Research Group, Department of Pharmacology and Toxicology, German University in Cairo, New Cairo City, Main Entrance Al Tagamoa Al Khames, 11835, Cairo, Egypt.
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Urbaczek AC, Ribeiro LCDA, Ximenes VF, Afonso A, Nogueira CT, Generoso WC, Alberice JV, Rudnicki M, Ferrer R, da Fonseca LM, da Costa PI. Inflammatory response of endothelial cells to hepatitis C virus recombinant envelope glycoprotein 2 protein exposure. Mem Inst Oswaldo Cruz 2014; 109:748-56. [PMID: 25317702 PMCID: PMC4238766 DOI: 10.1590/0074-0276140090] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 07/29/2014] [Indexed: 12/12/2022] Open
Abstract
The hepatitis C virus (HCV) encodes approximately 10 different structural and non-structural proteins, including the envelope glycoprotein 2 (E2). HCV proteins, especially the envelope proteins, bind to cell receptors and can damage tissues. Endothelial inflammation is the most important determinant of fibrosis progression and, consequently, cirrhosis. The aim of this study was to evaluate and compare the inflammatory response of endothelial cells to two recombinant forms of the HCV E2 protein produced in different expression systems (Escherichia coli and Pichia pastoris). We observed the induction of cell death and the production of nitric oxide, hydrogen peroxide, interleukin-8 and vascular endothelial growth factor A in human umbilical vein endothelial cells (HUVECs) stimulated by the two recombinant E2 proteins. The E2-induced apoptosis of HUVECs was confirmed using the molecular marker PARP. The apoptosis rescue observed when the antioxidant N-acetylcysteine was used suggests that reactive oxygen species are involved in E2-induced apoptosis. We propose that these proteins are involved in the chronic inflammation caused by HCV.
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Affiliation(s)
- Ana Carolina Urbaczek
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
| | | | - Valdecir Farias Ximenes
- Departamento de Química, Faculdade de Ciências, Universidade Estadual
Paulista Julio de Mesquita Filho, Bauru, SP, Brasil
| | - Ana Afonso
- Departamento de Parasitologia Médica, Unidade de Parasitologia Médica e
Microbiologia, Instituto de Higiene e Medicina Tropcal, Universidade Nova de Lisboa,
Lisboa, Portugal
- Departamento de Morfologia e Patologia, Universidade Federal de São
Carlos, São Carlos, SP, Brasil
- Grupo de Bioanalítica, Microfabricações e Separações, Departamento de
Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São
Paulo, São Carlos, SP, Brasil
| | - Camila Tita Nogueira
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
| | - Wesley Cardoso Generoso
- Departamento de Genética e Evolução, Universidade Federal de São
Carlos, São Carlos, SP, Brasil
| | - Juliana Vieira Alberice
- Grupo de Bioanalítica, Microfabricações e Separações, Departamento de
Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São
Paulo, São Carlos, SP, Brasil
| | - Martina Rudnicki
- Escola de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo,
SP, Brasil
| | - Renila Ferrer
- Escola de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo,
SP, Brasil
| | - Luiz Marcos da Fonseca
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
| | - Paulo Inácio da Costa
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
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27
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Molteni CG, Principi N, Esposito S. Reactive oxygen and nitrogen species during viral infections. Free Radic Res 2014; 48:1163-9. [PMID: 25039433 DOI: 10.3109/10715762.2014.945443] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Oxygen and nitrogen radicals are frequently produced during viral infections. These radicals are not only a physiological mechanism for pathogen clearance but also result in many pathological consequences. Low concentrations of radicals can promote viral replication; however, high concentrations of radicals can also inhibit viral replication and are detrimental to the cell due to their mitogenic activity. We reviewed the detailed mechanisms behind oxygen and nitrogen radical production and focused on how viruses induce radical production. In addition, we examined the effects of oxygen and nitrogen radicals on both the virus and host. We also reviewed enzymatic and chemical detoxification mechanisms and recent advances in therapeutic antioxidant applications. Many molecules that modulate the redox balance have yielded promising results in cell and animal models of infection. This encourages their use in clinical practice either alone or with existing therapies. However, since the redox balance also plays an important role in host defence against pathogens, carefully designed clinical trials are needed to assess the therapeutic benefits and secondary effects of these molecules and whether these effects differ between different types of viral infections.
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Affiliation(s)
- C G Molteni
- Department of Pathophysiology and Transplantation, Pediatric Highly Intensive Care Unit, Università degli Studi di Milano, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico , Milan , Italy
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28
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Park IW, Fan Y, Luo X, Ryou MG, Liu J, Green L, He JJ. HIV-1 Nef is transferred from expressing T cells to hepatocytic cells through conduits and enhances HCV replication. PLoS One 2014; 9:e99545. [PMID: 24911518 PMCID: PMC4050050 DOI: 10.1371/journal.pone.0099545] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 05/16/2014] [Indexed: 12/15/2022] Open
Abstract
HIV-1 infection enhances HCV replication and as a consequence accelerates HCV-mediated hepatocellular carcinoma (HCC). However, the precise molecular mechanism by which this takes place is currently unknown. Our data showed that infectious HIV-1 failed to replicate in human hepatocytic cell lines. No discernible virus replication was observed, even when the cell lines transfected with HIV-1 proviral DNA were co-cultured with Jurkat T cells, indicating that the problem of liver deterioration in the co-infected patient is not due to the replication of HIV-1 in the hepatocytes of the HCV infected host. Instead, HIV-1 Nef protein was transferred from nef-expressing T cells to hepatocytic cells through conduits, wherein up to 16% (average 10%) of the cells harbored the transferred Nef, when the hepatocytic cells were co-cultured with nef-expressing Jurkat cells for 24 h. Further, Nef altered the size and numbers of lipid droplets (LD), and consistently up-regulated HCV replication by 1.5∼2.5 fold in the target subgenomic replicon cells, which is remarkable in relation to the initially indolent viral replication. Nef also dramatically augmented reactive oxygen species (ROS) production and enhanced ethanol-mediated up-regulation of HCV replication so as to accelerate HCC. Taken together, these data indicate that HIV-1 Nef is a critical element in accelerating progression of liver pathogenesis via enhancing HCV replication and coordinating modulation of key intra- and extra-cellular molecules for liver decay.
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Affiliation(s)
- In-Woo Park
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- * E-mail:
| | - Yan Fan
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Xiaoyu Luo
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Myoung-Gwi Ryou
- Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
| | - Jinfeng Liu
- Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Linden Green
- Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Johnny J. He
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
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29
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Reshi ML, Su YC, Hong JR. RNA Viruses: ROS-Mediated Cell Death. Int J Cell Biol 2014; 2014:467452. [PMID: 24899897 PMCID: PMC4034720 DOI: 10.1155/2014/467452] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 03/18/2014] [Accepted: 03/20/2014] [Indexed: 12/14/2022] Open
Abstract
Reactive oxygen species (ROS) are well known for being both beneficial and deleterious. The main thrust of this review is to investigate the role of ROS in ribonucleic acid (RNA) virus pathogenesis. Much evidences has accumulated over the past decade, suggesting that patients infected with RNA viruses are under chronic oxidative stress. Changes to the body's antioxidant defense system, in relation to SOD, ascorbic acid, selenium, carotenoids, and glutathione, have been reported in various tissues of RNA-virus infected patients. This review focuses on RNA viruses and retroviruses, giving particular attention to the human influenza virus, Hepatitis c virus (HCV), human immunodeficiency virus (HIV), and the aquatic Betanodavirus. Oxidative stress via RNA virus infections can contribute to several aspects of viral disease pathogenesis including apoptosis, loss of immune function, viral replication, inflammatory response, and loss of body weight. We focus on how ROS production is correlated with host cell death. Moreover, ROS may play an important role as a signal molecule in the regulation of viral replication and organelle function, potentially providing new insights in the prevention and treatment of RNA viruses and retrovirus infections.
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Affiliation(s)
- Mohammad Latif Reshi
- Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Yi-Che Su
- Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Jiann-Ruey Hong
- Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
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Anand SK, Singh J, Gaba A, Tikoo SK. Effect of bovine adenovirus 3 on mitochondria. Vet Res 2014; 45:45. [PMID: 24739681 PMCID: PMC3998056 DOI: 10.1186/1297-9716-45-45] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 03/31/2014] [Indexed: 01/23/2023] Open
Abstract
Viruses alter the structure and the function of mitochondria for survival. Electron microscopy analysis of the cells infected with bovine adenovirus 3 revealed extensive damage to the inner mitochondrial membrane characterized by dissolution of the cristae and amorphous appearance of mitochondrial matrix with little or no damage to the outer mitochondrial membrane. There were fewer cristae with altered morphology. Potential patches of protein synthesis machinary around mitochondria could be observed at 12 hours post infection (hpi). At 24 hpi, the multi vascular bodies were evident throughout the infected cell. ATP production, mitochondrial Ca2+ and mitochondrial membrane potential (MMP) peaked at 18 hpi but decreased significantly at 24 hpi. This decrease coincided with the increased production of superoxide (SO) and reactive oxygen species (ROS), at 24 hpi indicating acute oxidative stress in the cells and suggesting a complete failure of the cellular homeostatic machinary. The results reveal an intericate relationship between Ca2+ homeostasis, the ATP generation ability of cells, SO and ROS production, and regulation of MMP following infection by bovine adenovirus 3.
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Affiliation(s)
| | | | | | - Suresh K Tikoo
- Vaccine and Infectious Disease Organization -International Vaccine Center (VIDO- InterVac), University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada.
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31
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Iqbal J, McRae S, Banaudha K, Mai T, Waris G. Mechanism of hepatitis C virus (HCV)-induced osteopontin and its role in epithelial to mesenchymal transition of hepatocytes. J Biol Chem 2013; 288:36994-7009. [PMID: 24240095 DOI: 10.1074/jbc.m113.492314] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Osteopontin (OPN) is a secreted phosphoprotein, originally characterized in malignant-transformed epithelial cells. OPN is associated with tumor metastasis of several tumors and is overexpressed in hepatocellular carcinoma (HCC) tissue involving HCC invasion and metastasis. Importantly, OPN is significantly up-regulated in liver injury, inflammation, and hepatitis C virus (HCV)-associated HCC. However, the underlying mechanisms of OPN activation and its role in HCV-mediated liver disease pathogenesis are not known. In this study, we investigated the mechanism of OPN activation in HCV-infected cells. We demonstrate that HCV-mediated Ca(2+) signaling, elevation of reactive oxygen species, and activation of cellular kinases such as p38 MAPK, JNK, PI3K, and MEK1/2 are involved in OPN activation. Incubation of HCV-infected cells with the inhibitors of AP-1 and Sp1 and site-directed mutagenesis of AP-1- and Sp1-binding sites on the OPN promoter suggest the critical role of AP-1 and Sp1 in OPN promoter activation. In addition, we show the in vivo interactions of AP-1 and Sp1 with the OPN promoter using chromatin immunoprecipitation assay. We also show the calpain-mediated processing of precursor OPN (∼75 kDa) into ∼55-, ∼42-, and ∼36-kDa forms of OPN in HCV-infected cells. Furthermore, we demonstrate the critical role of HCV-induced OPN in increased phosphorylation of Akt and GSK-3β followed by the activation of β-catenin, which can lead to EMT of hepatocytes. Taken together, these studies provide an insight into the mechanisms of OPN activation that is relevant to the metastasis of HCV-associated HCC.
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Affiliation(s)
- Jawed Iqbal
- From the Department of Microbiology and Immunology, H. M. Bligh Cancer Research Laboratories, Rosalind Franklin University of Medicine and Science, Chicago Medical School, North Chicago, Illinois 60064 and
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32
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Goto K, Lin W, Zhang L, Jilg N, Shao RX, Schaefer EA, Zhao H, Fusco DN, Peng LF, Kato N, Chung RT. The AMPK-related kinase SNARK regulates hepatitis C virus replication and pathogenesis through enhancement of TGF-β signaling. J Hepatol 2013; 59:942-8. [PMID: 23831117 PMCID: PMC3866804 DOI: 10.1016/j.jhep.2013.06.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 06/03/2013] [Accepted: 06/19/2013] [Indexed: 01/07/2023]
Abstract
BACKGROUND & AIMS Hepatitis C virus (HCV) is a major cause of chronic liver disease worldwide. The biological and therapeutic importance of host cellular cofactors for viral replication has been recently appreciated. Here we examined the roles of SNF1/AMP kinase-related kinase (SNARK) in HCV replication and pathogenesis. METHODS The JFH1 infection system and the full-length HCV replicon OR6 cell line were used. Gene expression was knocked down by siRNAs. SNARK mutants were created by site-directed mutagenesis. Intracellular mRNA levels were measured by qRT-PCR. Endogenous and overexpressed proteins were detected by Western blot analysis and immunofluorescence. Transforming growth factor (TGF)-β signaling was monitored by a luciferase reporter construct. Liver biopsy samples from HCV-infected patients were analyzed for SNARK expression. RESULTS Knockdown of SNARK impaired viral replication, which was rescued by wild type SNARK but not by unphosphorylated or kinase-deficient mutants. Knockdown and overexpression studies demonstrated that SNARK promoted TGF-β signaling in a manner dependent on both its phosphorylation and kinase activity. In turn, chronic HCV replication upregulated the expression of SNARK in patients. Further, the SNARK kinase inhibitor metformin suppressed both HCV replication and SNARK-mediated enhancement of TGF-β signaling. CONCLUSIONS Thus reciprocal regulation between HCV and SNARK promotes TGF-β signaling, a major driver of hepatic fibrogenesis. These findings suggest that SNARK will be an attractive target for the design of novel host-directed antiviral and antifibrotic drugs.
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Affiliation(s)
- Kaku Goto
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA,The Advanced Clinical Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan,Japan Society for the Promotion of Science, Tokyo 102-8472, Japan
| | - Wenyu Lin
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Leiliang Zhang
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Nikolaus Jilg
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Run-Xuan Shao
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Esperance A.K. Schaefer
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Hong Zhao
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Dahlene N. Fusco
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Lee F. Peng
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Naoya Kato
- The Advanced Clinical Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Raymond T. Chung
- Gastrointestinal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA,Corresponding author. Address: Gastrointestinal Unit, Massachusetts General Hospital, Boston, MA 02114, USA. Tel.: +1 617 724 7562; fax: +1 617 643 0446. (R.T. Chung)
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Anand SK, Tikoo SK. Viruses as modulators of mitochondrial functions. Adv Virol 2013; 2013:738794. [PMID: 24260034 PMCID: PMC3821892 DOI: 10.1155/2013/738794] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 08/30/2013] [Indexed: 02/07/2023] Open
Abstract
Mitochondria are multifunctional organelles with diverse roles including energy production and distribution, apoptosis, eliciting host immune response, and causing diseases and aging. Mitochondria-mediated immune responses might be an evolutionary adaptation by which mitochondria might have prevented the entry of invading microorganisms thus establishing them as an integral part of the cell. This makes them a target for all the invading pathogens including viruses. Viruses either induce or inhibit various mitochondrial processes in a highly specific manner so that they can replicate and produce progeny. Some viruses encode the Bcl2 homologues to counter the proapoptotic functions of the cellular and mitochondrial proteins. Others modulate the permeability transition pore and either prevent or induce the release of the apoptotic proteins from the mitochondria. Viruses like Herpes simplex virus 1 deplete the host mitochondrial DNA and some, like human immunodeficiency virus, hijack the host mitochondrial proteins to function fully inside the host cell. All these processes involve the participation of cellular proteins, mitochondrial proteins, and virus specific proteins. This review will summarize the strategies employed by viruses to utilize cellular mitochondria for successful multiplication and production of progeny virus.
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Affiliation(s)
- Sanjeev K. Anand
- Vaccine & Infection Disease Organization-International Vaccine Center (VIDO-InterVac), University of Saskatchewan, 120 Veterinary Road, Saskatoon, SK, Canada S7E 5E3
- Veterinary Microbiology, University of Saskatchewan, 120 Veterinary Road, Saskatoon, SK, Canada S7E 5E3
| | - Suresh K. Tikoo
- Vaccine & Infection Disease Organization-International Vaccine Center (VIDO-InterVac), University of Saskatchewan, 120 Veterinary Road, Saskatoon, SK, Canada S7E 5E3
- Veterinary Microbiology, University of Saskatchewan, 120 Veterinary Road, Saskatoon, SK, Canada S7E 5E3
- School of Public Health, University of Saskatchewan, 120 Veterinary Road, Saskatoon, SK, Canada S7E 5E3
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Paracha UZ, Fatima K, Alqahtani M, Chaudhary A, Abuzenadah A, Damanhouri G, Qadri I. Oxidative stress and hepatitis C virus. Virol J 2013; 10:251. [PMID: 23923986 PMCID: PMC3751576 DOI: 10.1186/1743-422x-10-251] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 07/31/2013] [Indexed: 02/08/2023] Open
Abstract
The disproportionate imbalance between the systemic manifestation of reactive oxygen species and body’s ability to detoxify the reactive intermediates is referred to as oxidative stress. Several biological processes as well as infectious agents, physiological or environmental stress, and perturbed antioxidant response can promote oxidative stress. Oxidative stress usually happens when cells are exposed to more electrically charged reactive oxygen species (ROS) such as H2O2 or O2-. The cells’ ability to handle such pro-oxidant species is impeded by viral infections particularly within liver that plays an important role in metabolism and detoxification of harmful substances. During liver diseases (such as hepatocellular or cholestatic problems), the produced ROS are involved in transcriptional activation of a large number of cytokines and growth factors, and continued production of ROS and Reactive Nitrogen Species (RNS) feed into the vicious cycle. Many human viruses like HCV are evolved to manipulate this delicate pro- and antioxidant balance; thus generating the sustainable oxidative stress that not only causes hepatic damage but also stimulates the processes to reduce treatment of damage. In this review article, the oxidant and antioxidant pathways that are perturbed by HCV genes are discussed. In the first line of risk, the pathways of lipid metabolism present a clear danger in accumulation of viral induced ROS. Viral infection leads to decrease in cellular concentrations of glutathione (GSH) resulting in oxidation of important components of cells such as proteins, DNA and lipids as well as double strand breakage of DNA. These disorders have the tendency to lead the cells toward cirrhosis and hepatocellular carcinoma in adults due to constant insult. We have highlighted the importance of such pathways and revealed differences in the extent of oxidative stress caused by HCV infection.
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Interplay between Hepatitis C Virus and Redox Cell Signaling. Int J Mol Sci 2013; 14:4705-21. [PMID: 23443167 PMCID: PMC3634496 DOI: 10.3390/ijms14034705] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/13/2013] [Accepted: 02/17/2013] [Indexed: 12/14/2022] Open
Abstract
Hepatitis C virus (HCV) infects approximately 3% of the world’s population. Currently licensed treatment of HCV chronic infection with pegylated-interferon-α and ribavirin, is not fully effective against all HCV genotypes and is associated to severe side effects. Thus, development of novel therapeutics and identification of new targets for treatment of HCV infection is necessary. Current opinion is orienting to target antiviral drug discovery to the host cell pathways on which the virus relies, instead of against viral structures. Many intracellular signaling pathways manipulated by HCV for its own replication are finely regulated by the oxido-reductive (redox) state of the host cell. At the same time, HCV induces oxidative stress that has been found to affect both virus replication as well as progression and severity of HCV infection. A dual role, positive or negative, for the host cell oxidized conditions on HCV replication has been reported so far. This review examines current information about the effect of oxidative stress on HCV life cycle and the main redox-regulated intracellular pathways activated during HCV infection and involved in its replication.
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36
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Arzumanyan A, Reis HMGPV, Feitelson MA. Pathogenic mechanisms in HBV- and HCV-associated hepatocellular carcinoma. Nat Rev Cancer 2013; 13:123-35. [PMID: 23344543 DOI: 10.1038/nrc3449] [Citation(s) in RCA: 599] [Impact Index Per Article: 54.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hepatocellular carcinoma (HCC) is a highly lethal cancer, with increasing worldwide incidence, that is mainly associated with chronic hepatitis B virus (HBV) and/or hepatitis C virus (HCV) infections. There are few effective treatments partly because the cell- and molecular-based mechanisms that contribute to the pathogenesis of this tumour type are poorly understood. This Review outlines pathogenic mechanisms that seem to be common to both viruses and which suggest innovative approaches to the prevention and treatment of HCC.
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Affiliation(s)
- Alla Arzumanyan
- Department of Biology and Sbarro Health Research Organization, College of Science and Technology, Temple University, 1900 N. 12th Street, Philadelphia, Pennsylvania 19122, USA
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Ivanov AV, Bartosch B, Smirnova OA, Isaguliants MG, Kochetkov SN. HCV and oxidative stress in the liver. Viruses 2013; 5:439-69. [PMID: 23358390 PMCID: PMC3640510 DOI: 10.3390/v5020439] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 12/26/2012] [Accepted: 01/17/2013] [Indexed: 12/12/2022] Open
Abstract
Hepatitis C virus (HCV) is the etiological agent accounting for chronic liver disease in approximately 2-3% of the population worldwide. HCV infection often leads to liver fibrosis and cirrhosis, various metabolic alterations including steatosis, insulin and interferon resistance or iron overload, and development of hepatocellular carcinoma or non-Hodgkin lymphoma. Multiple molecular mechanisms that trigger the emergence and development of each of these pathogenic processes have been identified so far. One of these involves marked induction of a reactive oxygen species (ROS) in infected cells leading to oxidative stress. To date, markers of oxidative stress were observed both in chronic hepatitis C patients and in various in vitro systems, including replicons or stable cell lines expressing viral proteins. The search for ROS sources in HCV-infected cells revealed several mechanisms of ROS production and thus a number of cellular proteins have become targets for future studies. Furthermore, during last several years it has been shown that HCV modifies antioxidant defense mechanisms. The aim of this review is to summarize the present state of art in the field and to try to predict directions for future studies.
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Affiliation(s)
- Alexander V. Ivanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str., 32, Moscow 119991, Russia; E-Mails: (A.I.); (O.S.); (S.K.)
| | - Birke Bartosch
- CRCL, INSERM U1052, CNRS 5286, Université de Lyon, 151, Cours A Thomas 69424 Lyon Cedex France; E-Mail:
| | - Olga A. Smirnova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str., 32, Moscow 119991, Russia; E-Mails: (A.I.); (O.S.); (S.K.)
| | - Maria G. Isaguliants
- Department of Molecular Biology, Tumor and Cell Biology, Karolinska Institutet, Nobels väg 16 17177 Stockholm, Sweden; E-Mail:
- D.I. Ivanovsky Institute of Virology, Gamaleya Str. 16, 123098 Moscow, Russia; E-Mail:
| | - Sergey N. Kochetkov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str., 32, Moscow 119991, Russia; E-Mails: (A.I.); (O.S.); (S.K.)
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Amelioration of influenza virus-induced reactive oxygen species formation by epigallocatechin gallate derived from green tea. Acta Pharmacol Sin 2012; 33:1533-41. [PMID: 22941291 DOI: 10.1038/aps.2012.80] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
AIM To study whether epigallocatechin gallate (EGCG), a green tea-derived polyphenol, exerted anti-influenza A virus activity in vitro and in vivo. METHODS Madin-Darby canine kidney (MDCK) cells were tested. The antiviral activity of EGCG in the cells was determined using hemagglutination assay and qPCR. Time of addition assay was performed to determine the kinetics of inhibition of influenza A by EGCG. The level of reactive oxygen species (ROS) were determined with confocal microscopy and flow cytometry. BALB/c mice were treated with EGCG (10, 20 or 40 mg·kg(-1)·d(-1), po) for 5 d. On the 3rd d of the treatment, the mice were infected with influenza A virus. Histopathological changes, lung index and virus titers in the lungs were determined. RESULTS Treatment of influenza A-infected MDCK cells with EGCG (1.25-100 nmol/L) inhibited influenza A replication in a concentration-dependent manner (the ED(50) value was 8.71±1.11 nmol/L). Treatment with EGCG (20 nmol/L) significantly suppressed the increased ROS level in MDCK cells following influenza A infection. In BALB/c mice infected with influenza virus, oral administration of EGCG (40 mg·kg(-1)·d(-1)) dramatically improved the survival rate, decreased the mean virus yields and mitigated viral pneumonia in the lungs, which was equivalent to oral administration of oseltamivir (40 mg·kg(-1)·d(-1)), a positive control drug. CONCLUSION The results provide a molecular basis for development of EGCG as a novel and safe chemopreventive agent for influenza A infection.
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Fan HN, Wang HJ, Yang-Dan CR, Ren L, Wang C, Li YF, Deng Y. Protective effects of hydrogen sulfide on oxidative stress and fibrosis in hepatic stellate cells. Mol Med Rep 2012; 7:247-53. [PMID: 23129058 DOI: 10.3892/mmr.2012.1153] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 09/11/2012] [Indexed: 11/05/2022] Open
Abstract
In hepatic fibrosis, hepatic stellate cells (HSCs) are activated and change into myofibroblast-like cells which are characterized by increased proliferation and extracellular matrix (ECM) synthesis. In this study, we investigated the regulatory effects of hydrogen sulfide (H2S) on hepatic fibrosis. We detected the proliferation, cell cycle progression, apoptosis, intracellular reactive oxygen species (ROS) and free calcium levels in ferric nitrilotriacetate (Fe-NTA)-activated HSCs treated with sodium hydrogen sulphide (NaHS), an H2S-releasing molecule. We also evaluated the effects of NaHS on fibrosis and ECM synthesis in rats with hepatic fibrosis induced by carbon tetrachloride (CCl4). MTT assay revealed that NaHS (500 µmol/l) suppressed the Fe-NTA-induced proliferation of HSC-T6 cells in a dose-dependent manner. NaHS induced G1 phase cell cycle arrest and apoptosis in the Fe-NTA-treated HSC-T6 cells. Furthermore, in the Fe-NTA-treated HSC-T6 cells, NaHS reduced intracellular levels of ROS at 1, 3 and 6 h and reduced intracellular free calcium levels at 3 and 6 h. H2S administration attenuated hepatic fibrosis and collagen Ⅰ protein expression in the rats with CCl4-induced hepatic fibrosis. In conclusion, exogenous H2S inhibits proliferation and induces cell cycle arrest and apoptosis in activated HSCs and attenuates CCl4-induced hepatic fibrosis and ECM expression.
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Affiliation(s)
- Hai-Ning Fan
- Department of Hepatopancreatobiliary Surgery, Affiliated Hospital of Qinghai University, Xining, Qinghai 810001, PR China
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Tissue-specific transplantation antigen P35B (TSTA3) immune response-mediated metabolism coupling cell cycle to postreplication repair network in no-tumor hepatitis/cirrhotic tissues (HBV or HCV infection) by biocomputation. Immunol Res 2012; 52:258-68. [PMID: 22528125 DOI: 10.1007/s12026-012-8337-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We constructed the low-expression tissue-specific transplantation antigen P35B (TSTA3) immune response-mediated metabolism coupling cell cycle to postreplication repair network in no-tumor hepatitis/cirrhotic tissues (HBV or HCV infection) compared with high-expression (fold change ≥ 2) human hepatocellular carcinoma in GEO data set, by using integration of gene regulatory network inference method with gene ontology analysis of TSTA3-activated up- and downstream networks. Our results showed TSTA3 upstream-activated CCNB2, CKS1B, ELAVL3, GAS7, NQO1, NTN1, OCRL, PLA2G1B, REG3A, SSTR5, etc. and TSTA3 downstream-activated BAP1, BRCA1, CCL20, MCM2, MS4A2, NTN1, REG1A, TP53I11, VCAN, SLC16A3, etc. in no-tumor hepatitis/cirrhotic tissues. TSTA3-activated network enhanced the regulation of apoptosis, cyclin-dependent protein kinase activity, cell migration, insulin secretion, transcription, cell division, cell proliferation, DNA replication, postreplication repair, cell differentiation, T-cell homeostasis, neutrophil-mediated immunity, neutrophil chemotaxis, interleukin-8 production, inflammatory response, immune response, B-cell activation, humoral immune response, actin filament organization, xenobiotic metabolism, lipid metabolism, phospholipid metabolism, leukotriene biosynthesis, organismal lipid catabolism, phosphatidylcholine metabolism, arachidonic acid secretion, activation of phospholipase A2, deoxyribonucleotide biosynthesis, heterophilic cell adhesion, activation of MAPK activity, signal transduction by p53 class mediator resulting in transcription of p21 class mediator, G-protein-coupled receptor protein signaling pathway, response to toxin, acute-phase response, DNA damage response, intercellular junction assembly, cell communication, and cell recognition, as a result of inducing immune response-mediated metabolism coupling cell cycle to postreplication repair in no-tumor hepatitis/cirrhotic tissues.
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Kaczkowski B, Rossing M, Andersen DK, Dreher A, Morevati M, Visser MA, Winther O, Nielsen FC, Norrild B. Integrative analyses reveal novel strategies in HPV11,-16 and -45 early infection. Sci Rep 2012; 2:515. [PMID: 22808421 PMCID: PMC3398386 DOI: 10.1038/srep00515] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Accepted: 07/02/2012] [Indexed: 01/24/2023] Open
Abstract
The interaction between human papillomavirus (HPV) and host cells is not well understood. We investigate the early stage of HPV infections by global expression profiling in a cell model, in which HaCaT cells were transfected with HPV11, HPV16 or HPV45 genomes. We report the differential expression of genes not previously implicated in HPV biology, such as the PSG family and ANKRD1, and of genes implicated in the biology of other viruses, e.g. MX1, IFI44 and DDX60. Carcinogenesis-related genes, e.g. ABL2, MGLL and CYR61, were upregulated by high-risk HPV16 and -45. The integrative analysis revealed the suppression of DNA repair by HPV11 and -16, and downregulation of cytoskeleton genes by all HPV types. Various signalling pathways were affected by the HPVs: IL-2 by HPV11; JAK-STAT by HPV16; and TGF-β, NOTCH and tyrosine kinase signalling by HPV45. This study uncovered novel strategies employed by HPV to establish infection and promote uncontrolled growth.
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Affiliation(s)
- Bogumil Kaczkowski
- The Bioinformatics Centre, Department of Biology and Biomedical Research and Innovation Centre, Copenhagen University, Ole Maaloes Vej 5, 2200 Copenhagen, Denmark
| | - Maria Rossing
- Department of Clinical Biochemistry, Copenhagen University Hospital, Blegdamsvej 5, 2100 Copenhagen, Denmark
| | - Ditte K. Andersen
- Institute of Cellular and Molecular Medicine, DNA Tumor Virus Laboratory, University of Copenhagen, Panum Institute, Blegdamsvej 3, 2200 Copenhagen, Denmark
| | - Anita Dreher
- Institute of Cellular and Molecular Medicine, DNA Tumor Virus Laboratory, University of Copenhagen, Panum Institute, Blegdamsvej 3, 2200 Copenhagen, Denmark
| | - Marya Morevati
- Institute of Cellular and Molecular Medicine, DNA Tumor Virus Laboratory, University of Copenhagen, Panum Institute, Blegdamsvej 3, 2200 Copenhagen, Denmark
| | - Melissa A. Visser
- Institute of Cellular and Molecular Medicine, DNA Tumor Virus Laboratory, University of Copenhagen, Panum Institute, Blegdamsvej 3, 2200 Copenhagen, Denmark
| | - Ole Winther
- The Bioinformatics Centre, Department of Biology and Biomedical Research and Innovation Centre, Copenhagen University, Ole Maaloes Vej 5, 2200 Copenhagen, Denmark
- DTU Informatics, Technical University of Denmark, 2800 Lyngby, Denmark
| | - Finn Cilius Nielsen
- Department of Clinical Biochemistry, Copenhagen University Hospital, Blegdamsvej 5, 2100 Copenhagen, Denmark
| | - Bodil Norrild
- Institute of Cellular and Molecular Medicine, DNA Tumor Virus Laboratory, University of Copenhagen, Panum Institute, Blegdamsvej 3, 2200 Copenhagen, Denmark
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Choi J. Oxidative stress, endogenous antioxidants, alcohol, and hepatitis C: pathogenic interactions and therapeutic considerations. Free Radic Biol Med 2012; 52:1135-50. [PMID: 22306508 DOI: 10.1016/j.freeradbiomed.2012.01.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 01/04/2012] [Accepted: 01/12/2012] [Indexed: 12/16/2022]
Abstract
Hepatitis C virus (HCV) is a blood-borne pathogen that was identified as an etiologic agent of non-A, non-B hepatitis in 1989. HCV is estimated to have infected at least 170 million people worldwide. The majority of patients infected with HCV do not clear the virus and become chronically infected, and chronic HCV infection increases the risk for hepatic steatosis, cirrhosis, and hepatocellular carcinoma. HCV induces oxidative/nitrosative stress from multiple sources, including inducible nitric oxide synthase, the mitochondrial electron transport chain, hepatocyte NAD(P)H oxidases, and inflammation, while decreasing glutathione. The cumulative oxidative burden is likely to promote both hepatic and extrahepatic conditions precipitated by HCV through a combination of local and more distal effects of reactive species, and clinical, animal, and in vitro studies strongly point to a role of oxidative/nitrosative stress in HCV-induced pathogenesis. Oxidative stress and hepatopathogenesis induced by HCV are exacerbated by even low doses of alcohol. Alcohol and reactive species may have other effects on hepatitis C patients such as modulation of the host immune system, viral replication, and positive selection of HCV sequence variants that contribute to antiviral resistance. This review summarizes the current understanding of redox interactions of HCV, outlining key experimental findings, directions for future research, and potential applications to therapy.
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Affiliation(s)
- Jinah Choi
- Department of Molecular Cell Biology, School of Natural Sciences, University of California at Merced, Merced, CA 95343, USA.
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HIV-1 coinfection and morphine coexposure severely dysregulate hepatitis C virus-induced hepatic proinflammatory cytokine release and free radical production: increased pathogenesis coincides with uncoordinated host defenses. J Virol 2011; 85:11601-14. [PMID: 21900165 DOI: 10.1128/jvi.05239-11] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Coinfection with human immunodeficiency virus type-1 (HIV-1) and hepatitis C virus (HCV) is a global problem that is more prevalent in injection drug users because they have a higher risk for acquiring both viruses. The roles of inflammatory cytokines and oxidative stress were examined in HIV-1- and HCV-coinfected human hepatic cells. Morphine (the bioactive product of heroin), HIV-1 Tat and the MN strain gp120 (gp120(MN)) proteins, and X4 HIV-1(LAI/IIIB) and R5 HIV-1(SF162) isolates were used to study the mechanisms of disease progression in HCV (JFH1)-infected Huh7.5.1 cell populations. HCV increased tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) release and augmented production of reactive oxygen species (ROS), nitric oxide (NO), and 3-nitrotyrosine (3-NT) in Huh7.5.1 cells. Morphine preferentially affected R5-tropic, but not X4-tropic, HIV-1 interactions with Huh7.5.1 cells. HIV-1 proteins or isolates increased cytokine release in HCV-infected cells, while adding morphine to coinfected cells caused complex imbalances, significantly disrupting cytokine secretion depending on the cytokine, morphine concentration, exposure duration, and particular pathogen involved. Production of ROS, NO, and 3-NT increased significantly in HCV- and HIV-1-coexposed cells while exposure to morphine further increased ROS. The proteasome inhibitor MG132 significantly decreased oxyradicals, cytokine levels, and HCV protein levels. Our findings indicate that hepatic inflammation is increased by combined exposure to HCV and HIV-1, that the ubiquitin-proteasome system and NF-κB contribute to key aspects of the response, and that morphine further exacerbates the disruption of host defenses. The results suggest that opioid abuse and HIV-1 coinfection each further accelerate HCV-mediated liver disease by dysregulating immune defenses.
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