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Di-Iacovo N, Pieroni S, Piobbico D, Castelli M, Scopetti D, Ferracchiato S, Della-Fazia MA, Servillo G. Liver Regeneration and Immunity: A Tale to Tell. Int J Mol Sci 2023; 24:1176. [PMID: 36674692 PMCID: PMC9864482 DOI: 10.3390/ijms24021176] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 12/28/2022] [Accepted: 12/30/2022] [Indexed: 01/11/2023] Open
Abstract
The physiological importance of the liver is demonstrated by its unique and essential ability to regenerate following extensive injuries affecting its function. By regenerating, the liver reacts to hepatic damage and thus enables homeostasis to be restored. The aim of this review is to add new findings that integrate the regenerative pathway to the current knowledge. An optimal regeneration is achieved through the integration of two main pathways: IL-6/JAK/STAT3, which promotes hepatocyte proliferation, and PI3K/PDK1/Akt, which in turn enhances cell growth. Proliferation and cell growth are events that must be balanced during the three phases of the regenerative process: initiation, proliferation and termination. Achieving the correct liver/body weight ratio is ensured by several pathways as extracellular matrix signalling, apoptosis through caspase-3 activation, and molecules including transforming growth factor-beta, and cyclic adenosine monophosphate. The actors involved in the regenerative process are numerous and many of them are also pivotal players in both the immune and non-immune inflammatory process, that is observed in the early stages of hepatic regeneration. Balance of Th17/Treg is important in liver inflammatory process outcomes. Knowledge of liver regeneration will allow a more detailed characterisation of the molecular mechanisms that are crucial in the interplay between proliferation and inflammation.
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Affiliation(s)
- Nicola Di-Iacovo
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Stefania Pieroni
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Danilo Piobbico
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Marilena Castelli
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Damiano Scopetti
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Simona Ferracchiato
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Maria Agnese Della-Fazia
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
| | - Giuseppe Servillo
- Department of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy
- Centro Universitario di Ricerca sulla Genomica Funzionale (C.U.R.Ge.F.), University of Perugia, 06123 Perugia, Italy
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Vlach M, Coppens-Exandier H, Jamin A, Berchel M, Scaviner J, Chesné C, Montier T, Jaffrès PA, Corlu A, Loyer P. Liposome-Mediated Gene Transfer in Differentiated HepaRG™ Cells: Expression of Liver Specific Functions and Application to the Cytochrome P450 2D6 Expression. Cells 2022; 11:cells11233904. [PMID: 36497165 PMCID: PMC9737581 DOI: 10.3390/cells11233904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/19/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
The goal of this study was to establish a procedure for gene delivery mediated by cationic liposomes in quiescent differentiated HepaRG™ human hepatoma cells. We first identified several cationic lipids promoting efficient gene transfer with low toxicity in actively dividing HepG2, HuH7, BC2 and progenitor HepaRG™ human hepatoma cells. The lipophosphoramidate Syn1-based nanovector, which allowed the highest transfection efficiencies of progenitor HepaRG™ cells, was next used to transfect differentiated HepaRG™ cells. Lipofection of these cells using Syn1-based liposome was poorly efficient most likely because the differentiated HepaRG™ cells are highly quiescent. Thus, we engineered the differentiated HepaRG™ Mitogenic medium supplement (ADD1001) that triggered robust proliferation of differentiated cells. Importantly, we characterized the phenotypical changes occurring during proliferation of differentiated HepaRG™ cells and demonstrated that mitogenic stimulation induced a partial and transient decrease in the expression levels of some liver specific functions followed by a fast recovery of the full differentiation status upon removal of the mitogens. Taking advantage of the proliferation of HepaRG™ cells, we defined lipofection conditions using Syn1-based liposomes allowing transient expression of the cytochrome P450 2D6, a phase I enzyme poorly expressed in HepaRG cells, which opens new means for drug metabolism studies in HepaRG™ cells.
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Affiliation(s)
- Manuel Vlach
- Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
- Institut AGRO Rennes-Angers, F-35042 Rennes, France
| | - Hugo Coppens-Exandier
- Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
- Biopredic International, F-35760 Saint Grégoire, France
| | - Agnès Jamin
- Biopredic International, F-35760 Saint Grégoire, France
| | - Mathieu Berchel
- Univ. Brest, CNRS, CEMCA, UMR 6521, F-29238 Brest, France
- Plateforme BiogenOuest SynNanoVect, F-44035 Nantes, France
| | - Julien Scaviner
- Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
- Biopredic International, F-35760 Saint Grégoire, France
| | | | - Tristan Montier
- Plateforme BiogenOuest SynNanoVect, F-44035 Nantes, France
- Univ. Brest, INSERM, EFS, UMR 1078, GGB-GTCA, F-29200 Brest, France
| | - Paul-Alain Jaffrès
- Univ. Brest, CNRS, CEMCA, UMR 6521, F-29238 Brest, France
- Plateforme BiogenOuest SynNanoVect, F-44035 Nantes, France
| | - Anne Corlu
- Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
- Correspondence: (A.C.); (P.L.); Tel.: +33-(02)-23233873 (P.L.)
| | - Pascal Loyer
- Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
- Plateforme BiogenOuest SynNanoVect, F-44035 Nantes, France
- Correspondence: (A.C.); (P.L.); Tel.: +33-(02)-23233873 (P.L.)
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3
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Haep N, Florentino RM, Squires JE, Bell A, Soto-Gutierrez A. The Inside-Out of End-Stage Liver Disease: Hepatocytes are the Keystone. Semin Liver Dis 2021; 41:213-224. [PMID: 33992030 PMCID: PMC8996333 DOI: 10.1055/s-0041-1725023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Chronic liver injury results in cirrhosis and end-stage liver disease (ESLD) which represents a leading cause of death worldwide, affecting people in their most productive years of life. Medical therapy can extend life, but the only definitive treatment is liver transplantation (LT). However, LT remains limited by access to quality donor organs and suboptimal long-term outcomes. The degeneration from healthy-functioning livers to cirrhosis and ESLD involves a dynamic process of hepatocyte damage, diminished hepatic function, and adaptation. However, the mechanisms responsible for deterioration of hepatocyte function and ultimately hepatic failure in man are poorly understood. We review the current understanding of cirrhosis and ESLD as a dynamic process and outline the current mechanisms associated with the development of hepatic failure from the clinical manifestations to energy adaptations, regeneration, and regulation of nuclear transcription factors. A new generation of therapeutics could target stabilization of hepatocyte differentiation and function to avoid the need for transplantation in patients with cirrhosis and ESLD.
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Affiliation(s)
- Nils Haep
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | | | - James E. Squires
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Children’s Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania,Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Aaron Bell
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania,Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Alejandro Soto-Gutierrez
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania,Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania
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4
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Llavanera M, Mateo-Otero Y, Bonet S, Barranco I, Fernández-Fuertes B, Yeste M. The triple role of glutathione S-transferases in mammalian male fertility. Cell Mol Life Sci 2020; 77:2331-2342. [PMID: 31807814 PMCID: PMC11105063 DOI: 10.1007/s00018-019-03405-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/11/2019] [Accepted: 11/28/2019] [Indexed: 12/19/2022]
Abstract
Male idiopathic infertility accounts for 15-25% of reproductive failure. One of the factors that has been linked to this condition is oxidative stress (OS), defined as the imbalance between antioxidants and reactive oxygen species. Amongst the different factors that protect the cell against OS, the members of the glutathione S-transferase (GST) superfamily play an important role. Interestingly, reduction or lack of some GSTs has been associated to infertility in men. Therefore, and to clarify the relationship between GSTs and male fertility, the aim of this work is to describe the role that GSTs play in the male reproductive tract and in sperm physiology. To that end, the present review provides a novel perspective on the triple role of GSTs (detoxification, regulation of cell signalling and fertilisation), and reports their localisation in sperm, seminal plasma and the male reproductive tract. Furthermore, we also tackle the existing correlation between some GST classes and male fertility. Due to the considerable impact of GSTs in human pathology and their tight relationship with fertility, future research should address the specific role of these proteins in male fertility, which could result in new approaches for the diagnosis and/or treatment of male infertility.
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Affiliation(s)
- Marc Llavanera
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Unit of Cell Biology, Department of Biology, Institute of Food and Agricultural Technology, Faculty of Sciences, University of Girona, C/Maria Aurèlia Campany, 69, Campus Montilivi, 17003, Girona, Spain
| | - Yentel Mateo-Otero
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Unit of Cell Biology, Department of Biology, Institute of Food and Agricultural Technology, Faculty of Sciences, University of Girona, C/Maria Aurèlia Campany, 69, Campus Montilivi, 17003, Girona, Spain
| | - Sergi Bonet
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Unit of Cell Biology, Department of Biology, Institute of Food and Agricultural Technology, Faculty of Sciences, University of Girona, C/Maria Aurèlia Campany, 69, Campus Montilivi, 17003, Girona, Spain
| | - Isabel Barranco
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Unit of Cell Biology, Department of Biology, Institute of Food and Agricultural Technology, Faculty of Sciences, University of Girona, C/Maria Aurèlia Campany, 69, Campus Montilivi, 17003, Girona, Spain
| | - Beatriz Fernández-Fuertes
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Unit of Cell Biology, Department of Biology, Institute of Food and Agricultural Technology, Faculty of Sciences, University of Girona, C/Maria Aurèlia Campany, 69, Campus Montilivi, 17003, Girona, Spain
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Unit of Cell Biology, Department of Biology, Institute of Food and Agricultural Technology, Faculty of Sciences, University of Girona, C/Maria Aurèlia Campany, 69, Campus Montilivi, 17003, Girona, Spain.
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5
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Li Q, Lu Q, Zhu MQ, Huang C, Yu KK, Huang YX, Zhao X, Luo XG, Zheng JM. Lower level of complement component C3 and C3a in the plasma means poor outcome in the patients with hepatitis B virus related acute-on-chronic liver failure. BMC Gastroenterol 2020; 20:106. [PMID: 32293297 PMCID: PMC7158068 DOI: 10.1186/s12876-020-01258-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/31/2020] [Indexed: 12/17/2022] Open
Abstract
Background The purpose of this study is to investigate whether or not the complement system is systemically activated and to specify the clinical and prognostic implications of its components during hepatitis B virus related acute-on-chronic liver failure (HBV-ACLF). Methods Blood samples were taken from twenty-seven patients diagnosed with HBV-ACLF, twenty-five patients diagnosed with chronic hepatitis B but without liver failure (CHB), and nine healthy volunteers (the control group). Plasma complement components were measured with Enzyme-linked immunosorbent assay. Correlative analysis were assessed between the levels of complement components and the liver failure related index. Results The concentrations of C3 was 6568 μg/ml in the HBV-ACLF group, 8916 μg/ml in the CHB group and 15,653 μg/ml in the control group, respectively (P < 0.05). The concentrations of C3a was 852 ng/ml in the HBV-ACLF group, 1008 ng/ml in the CHB group and 1755 ng/ml in the control group, respectively (P < 0.05). The concentrations of C1q was 50,509 ng/ml in the HBV-ACLF group, 114,640 ng/ml in the CHB group and 177,001 ng/ml in the control group, respectively (P < 0.05). The concentrations of C1q, C3, C3a, C4, C4a and sC5b-9 were significantly higher in the control group than those in the HBV-ACLF group (3.5, 2.4, 2.1, 1.4, 1.3 and 6.0 fold, respectively). However, there was no statistical significance of the differences in the plasma concentrations of mannose binding lectin and factor B between the HBV-ACLF group and control group. The levels of C3 and C3a were inversely correlated with MELDs or CLIF-C OFs (P < 0.05). Conclusions Our analysis demonstrated that the activation of the classical pathway mediated by C1q may play an important role in the pathogenesis of HBV-ACLF. Furthermore, the plasma levels of C3 and C3a may be potential novel biomarkers in predicting the outcome of HBV-ACLF.
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Affiliation(s)
- Qian Li
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China
| | - Qing Lu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China
| | - Meng-Qi Zhu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China
| | - Chong Huang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China
| | - Kang-Kang Yu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China
| | - Yu-Xian Huang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China
| | - Xu Zhao
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, 200040, China.,Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Xing-Guang Luo
- Department of Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, CT, 06510, USA
| | - Jian-Ming Zheng
- Department of Infectious Diseases, Huashan Hospital, Fudan University, No.12 Wurumqi Middle Road, Jing'an district, Room 508, Shanghai, 200040, People's Republic of China.
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6
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Ozaki M. Cellular and molecular mechanisms of liver regeneration: Proliferation, growth, death and protection of hepatocytes. Semin Cell Dev Biol 2019; 100:62-73. [PMID: 31669133 DOI: 10.1016/j.semcdb.2019.10.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 10/09/2019] [Accepted: 10/14/2019] [Indexed: 01/08/2023]
Abstract
Liver regeneration is an important and necessary process that the liver depends on for recovery from injury. The regeneration process consists of a complex network of cells and organs, including liver cells (parenchymal and non-parenchymal cells) and extrahepatic organs (thyroid, adrenal glands, pancreas, duodenum, spleen, and autonomic nervous system). The regeneration process of a normal, healthy liver depends mainly on hepatocyte proliferation, growth, and programmed cell death. Cell proliferation and growth are regulated in a cooperative manner by interleukin (IL)-6/janus kinase (Jak)/signal transducers and activators of transcription-3 (STAT3), and phosphoinositide 3-kinase (PI3-K)/phosphoinositide-dependent protein kinase 1 (PDK1)/Akt pathways. The IL-6/Jak/STAT3 pathway regulates hepatocyte proliferation and protects against cell death and oxidative stress. The PI3-K/PDK1/Akt pathway is primarily responsible for the regulation of cell size, sending mitotic signals in addition to pro-survival, antiapoptotic and antioxidative signals. Though programmed cell death may interfere with liver regeneration in a pathological situation, it seems to play an important role during the termination phase, even in a normal, healthy liver regeneration. However, further study is needed to fully elucidate the mechanisms regulating the processes of liver regeneration with regard to cell-to-cell and organ-to-organ networks at the molecular and cellular levels.
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Affiliation(s)
- Michitaka Ozaki
- Department of Biological Response and Regulation, Faculty of Health Sciences, Hokkaido University, N12, W5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan.
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7
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Demazeau M, Quesnot N, Ripoche N, Rauch C, Jeftić J, Morel F, Gauffre F, Benvegnu T, Loyer P. Efficient transfection of Xenobiotic Responsive Element-biosensor plasmid using diether lipid and phosphatidylcholine liposomes in differentiated HepaRG cells. Int J Pharm 2017; 524:268-278. [PMID: 28365389 DOI: 10.1016/j.ijpharm.2017.03.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 10/19/2022]
Abstract
In this study, we evaluated cationic liposomes prepared from diether-NH2 and egg phosphatidylcholine (EPC) for in vitro gene delivery. The impact of the lipid composition, i.e. the EPC and Diether-NH2 molar ratio, on in vitro transfection efficiency and cytotoxicity was investigated using the human HEK293T and hepatoma HepaRG cells known to be permissive and poorly permissive cells for liposome-mediated gene transfer, respectively. Here, we report that EPC/Diether-NH2-based liposomes enabled a very efficient transfection with low cytotoxicity compared to commercial transfection reagents in both HEK293T and proliferating progenitor HepaRG cells. Taking advantage of these non-toxic EPC/Diether-NH2-based liposomes, we developed a method to efficiently transfect differentiated hepatocyte-like HepaRG cells and a biosensor plasmid containing a Xenobiotic Responsive Element and a minimal promoter driving the transcription of the luciferase reporter gene. We demonstrated that the luciferase activity was induced by a canonical inducer of cytochrome P450 genes, the benzo[a]pyrene, and two environmental contaminants, the fluoranthene, a polycyclic aromatic hydrocarbon, and the endosulfan, an organochlorine insecticide, known to induce toxicity and genotoxicity in differentiated HepaRG cells. In conclusion, we established a new efficient lipofection-mediated gene transfer in hepatocyte-like HepaRG cells opening new perspectives in drug evaluation relying on xenobiotic inducible biosensor plasmids.
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Affiliation(s)
- Maxime Demazeau
- Ecole Nationale Supérieure de Chimie de Rennes, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Plateforme SynNanoVect, Biogenouest, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France
| | - Nicolas Quesnot
- INSERM, INRA, Univ Rennes 1, Univ Bretagne Loire, Nutrition Metabolisms and Cancer (NuMeCan), Plateforme SynNanoVect, Biogenouest, Rennes, France
| | - Nicolas Ripoche
- Ecole Nationale Supérieure de Chimie de Rennes, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Plateforme SynNanoVect, Biogenouest, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France
| | - Claudine Rauch
- INSERM, INRA, Univ Rennes 1, Univ Bretagne Loire, Nutrition Metabolisms and Cancer (NuMeCan), Plateforme SynNanoVect, Biogenouest, Rennes, France
| | - Jelena Jeftić
- Ecole Nationale Supérieure de Chimie de Rennes, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Plateforme SynNanoVect, Biogenouest, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France
| | - Fabrice Morel
- INSERM, INRA, Univ Rennes 1, Univ Bretagne Loire, Nutrition Metabolisms and Cancer (NuMeCan), Plateforme SynNanoVect, Biogenouest, Rennes, France
| | - Fabienne Gauffre
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 263 Avenue du Général Leclerc, F-35042 Rennes Cedex, France.
| | - Thierry Benvegnu
- Ecole Nationale Supérieure de Chimie de Rennes, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Plateforme SynNanoVect, Biogenouest, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France.
| | - Pascal Loyer
- INSERM, INRA, Univ Rennes 1, Univ Bretagne Loire, Nutrition Metabolisms and Cancer (NuMeCan), Plateforme SynNanoVect, Biogenouest, Rennes, France.
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Abstract
Acute-on-chronic liver failure (ACLF) is a distinct entity that differs from acute liver failure and decompensated cirrhosis in timing, presence of treatable acute precipitant, and course of disease, with a potential for self-recovery. The core concept is acute deterioration of existing liver function in a patient of chronic liver disease with or without cirrhosis in response to an acute insult. The insult should be a hepatic one and presentation in the form of liver failure (jaundice, encephalopathy, coagulopathy, ascites) with or without extrahepatic organ failure in a defined time frame. ACLF is characterized by a state of deregulated inflammation. Initial cytokine burst presenting as SIRS, progression to CARS and associated immunoparalysis leads to sepsis and multi-organ failure. Early identification of the acute insult and mitigation of the same, use of nucleoside analogue in HBV-ACLF, steroid in severe alcoholic hepatitis, steroid in severe autoimmune hepatitis and/or bridging therapy lead to recovery, with a 90-day transplant-free survival rate of up to 50 %. First-week presentation is crucial concerning SIRS/sepsis, development, multiorgan failure and consideration of transplant. A protocol-based multi-disciplinary approach including critical care hepatology, early liver transplant before multi-organ involvement, or priority for organ allocation may improve the outcome. Presentation with extrahepatic organ involvement or inclusion of sepsis as an acute insult in definition restricts the therapy, i.e., liver transplant or bridging therapy, and needs serious consideration. Augmentation of regeneration, cell-based therapy, immunotherapy, and gut microbiota modulation are the emerging areas and need further research.
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Affiliation(s)
- Shiv Kumar Sarin
- Department of Hepatology and Liver Transplant, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India.
| | - Ashok Choudhury
- Department of Hepatology and Liver Transplant, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India
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9
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Braga DPAF, Setti AS, Lo Turco EG, Cordeiro FB, Cabral EC, Cortezzi SS, Ono E, Figueira RCS, Eberlin MN, Borges E. Protein expression in human cumulus cells as an indicator of blastocyst formation and pregnancy success. J Assist Reprod Genet 2016; 33:1571-1583. [PMID: 27614633 DOI: 10.1007/s10815-016-0800-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/17/2016] [Indexed: 12/14/2022] Open
Abstract
PURPOSE The goal for the present study was to implement a technique for protein extraction and identification in human cumulus cells (CCs). METHODS Forty samples of CCs were collected after ovum pick-up from patients undergoing intracytoplasmic sperm injection (ICSI). Samples were split into the blastocyst group (n = 10), including patients in which all embryos converted into blastocysts, and the non-blastocyst group (n = 10), including patients in which none of the embryos reached the blastocyst stage or the positive-pregnancy (n = 10) and negative-pregnancy group (n = 10). Proteins were extracted and injected into a liquid chromatography system coupled to a mass spectrometer. The spectra were processed and used to search a database. RESULTS There were 87 different proteins in samples from the blastocyst and non-blastocyst groups, in which 30 were exclusively expressed in the blastocyst group and 17 in the non-blastocyst group. Among the 72 proteins detected in the pregnancy groups, 19 were exclusively expressed in the positive, and 16 were exclusively expressed in the negative-pregnancy group. CONCLUSIONS CC proteomics may be useful for predicting pregnancy success and the identification of patients that should be included in extended embryo culture programs.
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Affiliation(s)
- Daniela Paes Almeida Ferreira Braga
- Fertility Medical Group, Av. Brigadeiro Luis Antônio, 4545, São Paulo, SP, 01401-002, Brazil.,Disciplina de Urologia, Área de Reprodução Humana, Departamento de Cirurgia, Universidade Federal de São Paulo-UNIFESP, Rua Embaú, 231, São Paulo, SP, 04039-060, Brazil.,Instituto Sapientiae-Centro de Estudos e Pesquisa em Reprodução Humana Assistida, Rua Vieira Maciel, 62, São Paulo, SP, 04503-040, Brazil
| | - Amanda Souza Setti
- Fertility Medical Group, Av. Brigadeiro Luis Antônio, 4545, São Paulo, SP, 01401-002, Brazil.,Instituto Sapientiae-Centro de Estudos e Pesquisa em Reprodução Humana Assistida, Rua Vieira Maciel, 62, São Paulo, SP, 04503-040, Brazil
| | - Edson Guimarães Lo Turco
- Disciplina de Urologia, Área de Reprodução Humana, Departamento de Cirurgia, Universidade Federal de São Paulo-UNIFESP, Rua Embaú, 231, São Paulo, SP, 04039-060, Brazil
| | - Fernanda Bertuccez Cordeiro
- Disciplina de Urologia, Área de Reprodução Humana, Departamento de Cirurgia, Universidade Federal de São Paulo-UNIFESP, Rua Embaú, 231, São Paulo, SP, 04039-060, Brazil
| | - Elaine Cristina Cabral
- Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agronômicas (CPQBA)-Universidade de Campinas-UNICAMP, Campinas, SP, 13083-970, Brazil
| | - Sylvia Sanches Cortezzi
- Instituto Sapientiae-Centro de Estudos e Pesquisa em Reprodução Humana Assistida, Rua Vieira Maciel, 62, São Paulo, SP, 04503-040, Brazil
| | - Erika Ono
- Instituto Sapientiae-Centro de Estudos e Pesquisa em Reprodução Humana Assistida, Rua Vieira Maciel, 62, São Paulo, SP, 04503-040, Brazil
| | | | - Marcos Nogueira Eberlin
- Laboratório ThoMSon de Espectrometria de Massas-Instituto de Química, Universidade de Campinas-UNICAMP, Campinas, SP, 13083-970, Brazil
| | - Edson Borges
- Fertility Medical Group, Av. Brigadeiro Luis Antônio, 4545, São Paulo, SP, 01401-002, Brazil. .,Disciplina de Urologia, Área de Reprodução Humana, Departamento de Cirurgia, Universidade Federal de São Paulo-UNIFESP, Rua Embaú, 231, São Paulo, SP, 04039-060, Brazil.
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Sarin SK, Choudhury A. Acute-on-chronic liver failure: terminology, mechanisms and management. Nat Rev Gastroenterol Hepatol 2016; 13:131-49. [PMID: 26837712 DOI: 10.1038/nrgastro.2015.219] [Citation(s) in RCA: 238] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Acute-on-chronic liver failure (ACLF) is a distinct clinical entity and differs from acute liver failure and decompensated cirrhosis in timing, presence of acute precipitant, course of disease and potential for unaided recovery. The definition involves outlining the acute and chronic insults to include a homogenous patient group with liver failure and an expected outcome in a specific timeframe. The pathophysiology of ACLF relates to persistent inflammation, immune dysregulation with initial wide-spread immune activation, a state of systematic inflammatory response syndrome and subsequent sepsis due to immune paresis. The disease severity and outcome can be predicted by both hepatic and extrahepatic organ failure(s). Clinical recovery is expected with the use of nucleoside analogues for hepatitis B, and steroids for severe alcoholic hepatitis and, possibly, severe autoimmune hepatitis. Artificial liver support systems help remove toxins and metabolites and serve as a bridge therapy before liver transplantation. Hepatic regeneration during ongoing liver failure, although challenging, is possible through the use of growth factors. Liver transplantation remains the definitive treatment with a good outcome. Pre-emptive antiviral agents for hepatitis B before chemotherapy to prevent viral reactivation and caution in using potentially hepatotoxic drugs can prevent the development of ACLF.
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Affiliation(s)
- Shiv K Sarin
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, Vasant Kunj, New Delhi 110070, India
| | - Ashok Choudhury
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, Vasant Kunj, New Delhi 110070, India
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11
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Paul S, Jakhar R, Bhardwaj M, Kang SC. Glutathione-S-transferase omega 1 (GSTO1-1) acts as mediator of signaling pathways involved in aflatoxin B1-induced apoptosis-autophagy crosstalk in macrophages. Free Radic Biol Med 2015; 89:1218-30. [PMID: 26561775 DOI: 10.1016/j.freeradbiomed.2015.11.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 10/19/2015] [Accepted: 11/04/2015] [Indexed: 12/29/2022]
Abstract
Aflatoxin B1 (AFB1) is the most toxic aflatoxin species and has been shown to be associated with specific as well as non-specific immune responses. In the present study, using murine macrophage Raw 264.7 cells as a model, we report that short exposure (6h) to AFB1 caused an increase in the cellular calcium pool in mitochondria, which in turn elevated reactive oxygen species (ROS)-mediated oxidative stress and led to loss of mitochondrial membrane potential and ultimately c-Jun N-terminal kinases (JNK)-mediated caspase-dependent cell death. On the contrary, longer exposure (12h) to AFB1 reduced JNK phosphorylation and cell death in macrophages. Measurement of autophagic flux demonstrated that autophagy induction through the canonical pathway was responsible for suppressing AFB1-induced apoptosis after 12h. As a detailed molecular mechanism, we found that the unfolded protein response (UPR) machinery was active at 12h post-exposure to AFB1 and induced cytoprotective autophagy as confirmed by determination of major autophagic markers. Inhibition of autophagy by Beclin-1 siRNA also resulted in JNK-mediated cell death. We further established that glutathione S transferase omega1-1 (GSTO1-1), a specific class of GST, was the responsible factor between apoptosis and autophagy crosstalk. Targeting of GSTO1-1 increased JNK-mediated apoptosis by 2-fold compared to the control, whereas autophagy rate was reduced. Thus, increased expression of GSTO1-1 was associated with increased protein glutathionylation, an important protein modification in response to cellular redox status.
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Affiliation(s)
- Souren Paul
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea
| | - Rekha Jakhar
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea
| | - Monika Bhardwaj
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea
| | - Sun Chul Kang
- Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea.
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Kalinina EV, Chernov NN, Novichkova MD. Role of glutathione, glutathione transferase, and glutaredoxin in regulation of redox-dependent processes. BIOCHEMISTRY (MOSCOW) 2015; 79:1562-83. [PMID: 25749165 DOI: 10.1134/s0006297914130082] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Over the last decade fundamentally new features have been revealed for the participation of glutathione and glutathione-dependent enzymes (glutathione transferase and glutaredoxin) in cell proliferation, apoptosis, protein folding, and cell signaling. Reduced glutathione (GSH) plays an important role in maintaining cellular redox status by participating in thiol-disulfide exchange, which regulates a number of cell functions including gene expression and the activity of individual enzymes and enzyme systems. Maintaining optimum GSH/GSSG ratio is essential to cell viability. Decrease in the ratio can serve as an indicator of damage to the cell redox status and of changes in redox-dependent gene regulation. Disturbance of intracellular GSH balance is observed in a number of pathologies including cancer. Consequences of inappropriate GSH/GSSG ratio include significant changes in the mechanism of cellular redox-dependent signaling controlled both nonenzymatically and enzymatically with the participation of isoforms of glutathione transferase and glutaredoxin. This review summarizes recent data on the role of glutathione, glutathione transferase, and glutaredoxin in the regulation of cellular redox-dependent processes.
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Affiliation(s)
- E V Kalinina
- Peoples' Friendship University of Russia, Moscow, 117198, Russia.
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13
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Pajaud J, Ribault C, Ben Mosbah I, Rauch C, Henderson C, Bellaud P, Aninat C, Loyer P, Morel F, Corlu A. Glutathione transferases P1/P2 regulate the timing of signaling pathway activations and cell cycle progression during mouse liver regeneration. Cell Death Dis 2015; 6:e1598. [PMID: 25590808 PMCID: PMC4669760 DOI: 10.1038/cddis.2014.562] [Citation(s) in RCA: 17] [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: 07/17/2014] [Revised: 11/18/2014] [Accepted: 11/19/2014] [Indexed: 01/01/2023]
Abstract
Glutathione transferases (GST) are phase II enzymes catalyzing the detoxification of endogenous noxious compounds and xenobiotics. They also regulate phosphorylation activities of MAPKinases in a catalytic-independent manner. Previous studies have demonstrated the regulation of JNK-dependent pathway by GSTP1/2. Considering the crucial role of JNK in the early steps of the hepatocyte cell cycle, we sought to determine whether GSTP1/2 were essential for hepatocyte proliferation following partial hepatectomy (PH). Using a conventional double knockout mouse model for the Gstp1 and Gstp2 genes, we found that the lack of GSTP1/P2 reduced the rate of DNA replication and mitotic index during the first wave of hepatocyte proliferation. The lowered proliferation was associated with the decrease in TNFalpha and IL-6 plasma concentrations, reduced hepatic HGF expression and delayed and/or altered activation of STAT3, JNK and ERK1/2 signaling pathways. In addition, the expression and/or activation of cell cycle regulators such as Cyclin D1, CDK4, E2F1 and MCM7 was postponed demonstrating that the absence of GSTP1/2 delayed the entry into and progression through the G1 phase of the cell cycle and impaired the synchrony of proliferation in hepatocytes following PH. Furthermore, while JNK and its downstream targets c-Jun and ATF2 were activated during the early steps of the liver regeneration in wild-type animals, the constitutively active JNK found in the quiescent liver of Gstp1/2 knockout mice underwent a decrease in its activity after PH. Transient induction of antioxidant enzymes and nitric oxide synthase were also delayed or repressed during the regenerative response. Altogether our results demonstrate that GSTP1/2 are a critical regulators of hepatocyte proliferation in the initial phases of liver regeneration.
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Affiliation(s)
- J Pajaud
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - C Ribault
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - I Ben Mosbah
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - C Rauch
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - C Henderson
- Medical Research Institute, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
| | - P Bellaud
- Université de Rennes 1, Faculté de Médecine, Rennes, France
- Plateforme Histopathologie H2P2, Biosit, Biogenouest, Université de Rennes 1, Rennes, France
| | - C Aninat
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - P Loyer
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - F Morel
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
| | - A Corlu
- Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, Rennes, France
- Université de Rennes 1, Faculté de Médecine, Rennes, France
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Peyre L, Rouimi P, de Sousa G, Héliès-Toussaint C, Carré B, Barcellini S, Chagnon MC, Rahmani R. Comparative study of bisphenol A and its analogue bisphenol S on human hepatic cells: a focus on their potential involvement in nonalcoholic fatty liver disease. Food Chem Toxicol 2014; 70:9-18. [PMID: 24793377 DOI: 10.1016/j.fct.2014.04.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 03/28/2014] [Accepted: 04/07/2014] [Indexed: 12/11/2022]
Abstract
For several decades, people have been in contact with bisphenol A (BPA) primarily through their diet. Nowadays it is gradually replaced by an analogue, bisphenol S (BPS). In this study, we compared the effects of these two bisphenols in parallel with the positive control diethylstilbestrol (DES) on different hepatocyte cell lines. Using a cellular impedance system we have shown that BPS is less cytotoxic than BPA in acute and chronic conditions. We have also demonstrated that, contrary to BPA, BPS is not able to induce an increase in intracellular lipid and does not activate the PXR receptor which is known to be involved in part, in this process. In parallel, it failed to modulate the expression of CYP3A4 and CYP2B6, the drug transporter ABCB1 and other lipid metabolism genes (FASN, PLIN). However, it appears to have a weak effect on GSTA4 protein expression and on the Erk1/2 pathway. In conclusion, in contrast to BPA, BPS does not appear to induce the metabolic syndrome that may lead to non-alcoholic fatty liver disease (NAFLD), in vitro. Although we have to pay special attention to BPS, its use could be less dangerous concerning this toxicological endpoint for human health.
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Affiliation(s)
- Ludovic Peyre
- UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), Laboratory of Xenobiotic's Cellular and Molecular Toxicology, 400 route des Chappes, BP167, 06903 Sophia-Antipolis Cedex, France.
| | - Patrick Rouimi
- UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), 180 chemin de Tournefeuille, 31027 Toulouse, France
| | - Georges de Sousa
- UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), Laboratory of Xenobiotic's Cellular and Molecular Toxicology, 400 route des Chappes, BP167, 06903 Sophia-Antipolis Cedex, France
| | - Cécile Héliès-Toussaint
- UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), 180 chemin de Tournefeuille, 31027 Toulouse, France
| | - Benjamin Carré
- UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), 180 chemin de Tournefeuille, 31027 Toulouse, France
| | - Sylvie Barcellini
- Neomah, Research in Toxicology, INRA-Agrobiotech, 06903 Sophia-Antipolis, France
| | - Marie-Christine Chagnon
- Nutox Laboratory, Derttech "Packtox", INSERM UMR866, AgroSupDijon, bâtiment Epicure, 1 esplanade Erasme, 21000 Dijon, France
| | - Roger Rahmani
- UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), Laboratory of Xenobiotic's Cellular and Molecular Toxicology, 400 route des Chappes, BP167, 06903 Sophia-Antipolis Cedex, France; UMR 1331 TOXALIM (Research Centre in Food Toxicology), Institut National de la Recherche Agronomique (INRA), 180 chemin de Tournefeuille, 31027 Toulouse, France.
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Keskin T, Isgor BS, Isgor YG, Yukruk F. Evaluation of Perylenediimide Derivatives for Potential Therapeutic Benefits on Cancer Chemotherapy. Chem Biol Drug Des 2012; 80:675-81. [DOI: 10.1111/cbdd.12004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Ito M, Imai M, Muraki M, Miyado K, Qin J, Kyuwa S, Yoshikawa Y, Hosoi Y, Saito H, Takahashi Y. GSTT1 is upregulated by oxidative stress through p38-MK2 signaling pathway in human granulosa cells: possible association with mitochondrial activity. Aging (Albany NY) 2012; 3:1213-23. [PMID: 22207314 PMCID: PMC3273902 DOI: 10.18632/aging.100418] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We previously reported that GSTT1 was upregulated in human granulosa cells during aging and that activation and localization of p38 MAPK was changed in parallel. Although oxidative stress is responsible for these changes, the age-associated expression of GSTT1 regulated by MAPKs and the role of GSTT1 in aged granulosa cells remain unclear. Therefore, we examined the relationship between the expression of GSTT1 and MAPK signaling pathways using human granulosa-like KGN cells stimulated with H2O2 in the presence or absence of various MAPK inhibitors. Interestingly, H2O2-induced GSTT1 was only inhibited by a p38 inhibitor. An inhibitor of MK2, a downstream regulator of p38, also diminished H2O2-induced GSTT1 upregulation. Notably, both p38 and MK2 were significantly inactivated in cells carrying an shRNA construct of GSTT1 (ΔGSTT1 cells), suggesting that the p38-MK2 pathway is essential for age-associated upregulation of GSTT1. The relevance of GSTT1 in mitochondrial activity was then determined. ΔGSTT1 cells displayed enhanced polarization of mitochondrial membrane potential without increasing the apoptosis, suggesting that the age-associated upregulation of GSTT1 may influence the mitochondrial activity of granulosa cells. Collectively, it appears that the age-associated expression of GSTT1 is induced through the p38 signaling pathway and GSTT1 influences homeostatic activities in granulosa cells.
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Affiliation(s)
- Megumu Ito
- Division of Reproductive Medicine, Department of Perinatal Medicine and Maternal Care, National Center for Child Health and Development, Tokyo, Japan
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17
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Regulation of signal transduction by glutathione transferases. Int J Hepatol 2012; 2012:137676. [PMID: 23094162 PMCID: PMC3474235 DOI: 10.1155/2012/137676] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 09/13/2012] [Accepted: 09/13/2012] [Indexed: 12/11/2022] Open
Abstract
Glutathione transferases (GST) are essentially known as enzymes that catalyse the conjugation of glutathione to various electrophilic compounds such as chemical carcinogens, environmental pollutants, and antitumor agents. However, this protein family is also involved in the metabolism of endogenous compounds which play critical roles in the regulation of signaling pathways. For example, the lipid peroxidation product 4-hydroxynonenal (4-HNE) and the prostaglandin 15-deoxy-Δ12,14-prostaglandin J(2) (15d-PGJ(2)) are metabolized by GSTs and these compounds are known to influence the activity of transcription factors and protein kinases involved in stress response, proliferation, differentiation, or apoptosis. Furthermore, several studies have demonstrated that GSTs are able to interact with different protein partners such as mitogen activated protein kinases (i.e., c-jun N-terminal kinase (JNK) and apoptosis signal-regulating kinase 1 (ASK1)) which are also involved in cell signaling. New functions of GSTs, including S-glutathionylation of proteins by GSTs and ability to be a nitric oxide (NO) carrier have also been described. Taken together, these observations strongly suggest that GST might play a crucial role during normal or cancer cells proliferation or apoptosis.
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18
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Combined Stimulation with the Tumor Necrosis Factor α and the Epidermal Growth Factor Promotes the Proliferation of Hepatocytes in Rat Liver Cultured Slices. Int J Hepatol 2012; 2012:785786. [PMID: 23119170 PMCID: PMC3480011 DOI: 10.1155/2012/785786] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 09/06/2012] [Accepted: 09/07/2012] [Indexed: 11/17/2022] Open
Abstract
The culture liver slices are mainly used to investigate drug metabolism and xenobiotic-mediated liver injuries while apoptosis and proliferation remain unexplored in this culture model. Here, we show a transient increase in LDH release and caspase activities indicating an ischemic injury during the slicing procedure. Then, caspase activities decrease and remain low in cultured slices demonstrating a low level of apoptosis. The slicing procedure is also associated with the G0/G1 transition of hepatocytes demonstrated by the activation of stress and proliferation signalling pathways including the ERK1/2 and JNK1/2/3 MAPKinases and the transient upregulation of c-fos. The cells further progress up to mid-G1 phase as indicated by the sequential induction of c-myc and p53 mRNA levels after the slicing procedure and at 24 h of culture, respectively. The stimulation by epidermal growth factor induces the ERK1/2 phosphorylation but fails to activate expression of late G1 and S phase markers such as cyclin D1 and Cdk1 indicating that hepatocytes are arrested in mid-G1 phase of the cell cycle. However, we found that combined stimulation by the proinflammatory cytokine tumor necrosis factor α and the epidermal growth factor promotes the commitment to DNA replication as observed in vivo during the liver regeneration.
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Fujiyoshi M, Ozaki M. Molecular mechanisms of liver regeneration and protection for treatment of liver dysfunction and diseases. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2011; 18:13-22. [PMID: 20607568 DOI: 10.1007/s00534-010-0304-2] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Liver regeneration is a necessary process that most liver damage depends on for recovery. Regeneration is achieved by a complex interactive network consisting of liver cells (hepatocytes, Kupffer cells, sinusoidal endothelial cells, hepatic stellate cells, and stem cells) and extrahepatic organs (thyroid gland, adrenal gland, pancreas, duodenum, and autonomous nervous system). The restoration of liver volume depends on hepatocyte proliferation, which includes initiation, proliferation, and termination phases. Hepatocytes are "primed" mainly by Kupffer cells via cytokines (IL-6 and TNF-alpha) and then "proliferation" and "cell growth" of hepatocytes are induced by the stimulations of cytokines and growth factors (HGF and TGF-alpha). Liver regeneration is achieved by cell proliferation and cell growth, where the IL-6/STAT3 and PI3-K/PDK1/Akt pathways play pivotal roles, respectively. IL-6/STAT3 pathway regulates hepatocyte proliferation via cyclin D1/p21 and protects against cell death by upregulating FLIP, Bcl-2, Bcl-xL, Ref1, and MnSOD. PI3-K/PDK1/Akt is known to be responsible for regulation of cell size via its downstream molecules such as mTOR in addition to being known for its survival, anti-apoptotic and anti-oxidative properties. Although the molecular mechanisms of liver regeneration have been actively studied, the mechanisms of liver regeneration must be elucidated and leveraged for the sufficient treatment of liver diseases.
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Affiliation(s)
- Masato Fujiyoshi
- Department of General Surgery, Hokkaido University School of Medicine, N-15, W-7 Kita-ku, Sapporo, Hokkaido 060-8638, Japan
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Abstract
Glutathione transferase (GST) kappa, also named mitochondrial GST, is a very ancient protein family with orthologs in bacteria and eukaryotes. Both the structure and the subcellular localization of GSTK1-1, in mitochondria and peroxisomes, make this enzyme distinct from cytosolic GSTs. Rodent and human GSTK1 exhibit activity towards a number of model GST substrates and, in Caenorhabditis elegans, this enzyme may be involved in energy and lipid metabolism, two functions related to mitochondria and peroxisomes. Interestingly, GST kappa is also a key regulator of adiponectin biosynthesis and multimerization suggesting that it might function as a chaperone to facilitate correct folding and assembly of proteins. Since adiponectin expression has been correlated with insulin resistance, obesity and diabetes, GSTK1 expression level which is negatively correlated with obesity in mice and human adipose tissues may be an important factor in these metabolic disorders. Furthermore, a polymorphism in the hGSTK1 promoter has been associated with insulin secretion and fat deposition.
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Affiliation(s)
- Fabrice Morel
- INSERM UMR991, Université de Rennes 1, F-35033 Rennes, France.
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Abel EL, Angel JM, Riggs PK, Langfield L, Lo HH, Person MD, Awasthi YC, Wang LE, Strom SS, Wei Q, DiGiovanni J. Evidence that Gsta4 modifies susceptibility to skin tumor development in mice and humans. J Natl Cancer Inst 2010; 102:1663-75. [PMID: 20966433 DOI: 10.1093/jnci/djq392] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The incidence of nonmelanoma skin cancer (NMSC) is equivalent to that of all other cancers combined. Previously, we mapped the 12-O-tetradecanoylphorbol-13-acetate (TPA) skin tumor promotion susceptibility locus, Psl1, to distal chromosome 9 in crosses of sensitive DBA/2 mice with relatively resistant C57BL/6 mice. Here, we used the mouse two-stage skin carcinogenesis model to identify the gene(s) responsible for the effects of Psl1. METHODS Interval-specific congenic mouse strains (n ≥ 59 mice per strain) were used to more precisely map the Psl1 locus. Having identified glutathione S-transferase α4 (Gsta4) as a candidate tumor promotion susceptibility gene that mapped within the delimited region, we analyzed Gsta4-deficient mice (n = 62) for susceptibility to skin tumor promotion by TPA. We used quantitative polymerase chain reaction, western blotting, and immunohistochemistry to verify induction of Gsta4 in mouse epidermis following TPA treatment and biochemical assays to associate Gsta4 activity with tumor promotion susceptibility. In addition, single-nucleotide polymorphisms (SNPs) in GSTA4 were analyzed in a case-control study of 414 NMSC patients and 450 control subjects to examine their association with human NMSC. Statistical analyses of tumor studies in mice were one-sided, whereas all other statistical analyses were two-sided. RESULTS Analyses of congenic mice indicated that at least two loci, Psl1.1 and Psl1.2, map to distal chromosome 9 and confer susceptibility to skin tumor promotion by TPA. Gsta4 maps to Psl1.2 and was highly induced (mRNA and protein) in the epidermis of resistant C57BL/6 mice compared with that of sensitive DBA/2 mice following treatment with TPA. Gsta4 activity levels were also higher in the epidermis of C57BL/6 mice following treatment with TPA. Gsta4-deficient mice (C57BL/6.Gsta4(-/-) mice) were more sensitive to TPA skin tumor promotion (0.8 tumors per mouse vs 0.4 tumors per mouse in wild-type controls; difference = 0.4 tumors per mouse; 95% confidence interval = 0.1 to 0.7, P = .007). Furthermore, inheritance of polymorphisms in GSTA4 was associated with risk of human NMSC. Three SNPs were found to be independent predictors of NMSC risk. Two of these were associated with increased risk of NMSC (odds ratios [ORs] = 1.60 to 3.42), while the third was associated with decreased risk of NMSC (OR = 0.63). In addition, a fourth SNP was associated with decreased risk of basal cell carcinoma only (OR = 0.44). CONCLUSIONS Gsta4/GSTA4 is a novel susceptibility gene for NMSC that affects risk in both mice and humans.
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Affiliation(s)
- Erika L Abel
- Department of Carcinogenesis, Science Park-Research Division, The University of Texas M.D. Anderson Cancer Center, Smithville, TX, USA
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Scharlau D, Borowicki A, Habermann N, Hofmann T, Klenow S, Miene C, Munjal U, Stein K, Glei M. Mechanisms of primary cancer prevention by butyrate and other products formed during gut flora-mediated fermentation of dietary fibre. Mutat Res 2009; 682:39-53. [PMID: 19383551 DOI: 10.1016/j.mrrev.2009.04.001] [Citation(s) in RCA: 223] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 04/08/2009] [Accepted: 04/14/2009] [Indexed: 05/27/2023]
Abstract
Dietary fibres are indigestible food ingredients that reach the colon and are then fermented by colonic bacteria, resulting mainly in the formation of short-chain fatty acids (SCFA) such as acetate, propionate, and butyrate. Those SCFA, especially butyrate, are recognised for their potential to act on secondary chemoprevention by slowing growth and activating apoptosis in colon cancer cells. Additionally, SCFA can also act on primary prevention by activation of different drug metabolising enzymes. This can reduce the burden of carcinogens and, therefore, decrease the number of mutations, reducing cancer risk. Activation of GSTs by butyrate has been studied on mRNA, protein, and enzyme activity level by real-time RT-PCR, cDNA microarrays, Western blotting, or photometrical approaches, respectively. Butyrate had differential effects in colon cells of different stages of cancer development. In HT29 tumour cells, e.g., mRNA GSTA4, GSTP1, GSTM2, and GSTT2 were induced. In LT97 adenoma cells, GSTM3, GSTT2, and MGST3 were induced, whereas GSTA2, GSTT2, and catalase (CAT) were elevated in primary colon cells. Colon cells of different stages of carcinogenesis differed in post-transcriptional regulatory mechanisms because butyrate increased protein levels of different GST isoforms and total GST enzyme activity in HT29 cells, whereas in LT97 cells, GST protein levels and activity were slightly reduced. Because butyrate increased histone acetylation and phosphorylation of ERK in HT29 cells, inhibition of histone deacetylases and the influence on MAPK signalling are possible mechanisms of GST activation by butyrate. Functional consequences of this activation include a reduction of DNA damage caused by carcinogens like hydrogen peroxide or 4-hydroxynonenal (HNE) in butyrate-treated colon cells. Treatment of colon cells with the supernatant from an in vitro fermentation of inulin increased GST activity and decreased HNE-induced DNA damage in HT29 cells. Additional animal and human studies are needed to define the exact role of dietary fibre and butyrate in inducing GST activity and reducing the risk of colon cancer.
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Affiliation(s)
- Daniel Scharlau
- Institute for Nutrition, Friedrich Schiller University Jena, Dornburger Strasse 24, 07743 Jena, Germany.
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Qian J, Jing J, Jin G, Wang H, Wang Y, Liu H, Wang H, Li R, Fan W, An Y, Sun W, Wang Y, Ma H, Miao R, Hu Z, Jin L, Wei Q, Shen H, Huang W, Lu D. Association between polymorphisms in the GSTA4 gene and risk of lung cancer: a case-control study in a Southeastern Chinese population. Mol Carcinog 2009; 48:253-259. [PMID: 18767114 DOI: 10.1002/mc.20478] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
GST Alpha 4 (GSTA4) has an important role in the protection against oxidative stress induced by carcinogens such as tobacco smoke. However, few studies investigated the association between GSTA4 polymorphisms and lung cancer risk. We genotyped three selected GSTA4 SNPs (rs182623 - 1718:T > A, rs3798804 + 5034:G > A and rs316141 + 13984:C > T) in a case-control study of 500 lung cancer patients and 517 cancer-free controls and evaluated the association between these SNPs and risk of lung cancer in this Han Chinese population. We found that there was a significant difference in genotype and allele frequency distributions of GSTA4 -1718 between the cases and the controls (P = 0.006 and P = 0.003, respectively). Compared with the GSTA4 -1718TT genotype, individuals with the TA + AA genotypes had a significantly decreased risk of lung cancer (adjusted OR, 0.63; 95% CI, 0.47-0.84; P = 0.006). Although there were no such statistical differences between the cases and controls at the loci +5034 and +13984, nor for histological types, individuals carrying the genotypes of -1718TA, +5034GG and +13984CT had a significantly decreased lung cancer risk (OR, 0.37; 95% CI, 0.23-0.61; P < 0.0001), especially for those smokers who smoked </=25 pack-years (P < 0.000001). These results need to be confirmed in larger studies with different ethnic groups.
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Affiliation(s)
- Ji Qian
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Jianying Jing
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.,Department of Biology, School of Environment and Chemical Engineering, Luoyang University, Luoyang, China
| | - Guangfu Jin
- Department of Epidemiology and Biostatistics, Cancer Research Center of Nanjing Medical University, Nanjing, China
| | - Haifeng Wang
- Department of Genetics, Chinese National Human Genome Center at Shanghai, Shanghai, China
| | - Yi Wang
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Hongliang Liu
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Haijian Wang
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Rui Li
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Weiwei Fan
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Yu An
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Weiwei Sun
- Department of Genetics, Chinese National Human Genome Center at Shanghai, Shanghai, China
| | - Yi Wang
- Department of Genetics, Chinese National Human Genome Center at Shanghai, Shanghai, China
| | - Hongxia Ma
- Department of Epidemiology and Biostatistics, Cancer Research Center of Nanjing Medical University, Nanjing, China
| | - Ruifeng Miao
- Department of Epidemiology and Biostatistics, Cancer Research Center of Nanjing Medical University, Nanjing, China
| | - Zhibin Hu
- Department of Epidemiology and Biostatistics, Cancer Research Center of Nanjing Medical University, Nanjing, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Qingyi Wei
- Department of Epidemiology, the University of Texas M.D. Anderson Cancer Center, Houston, Texas
| | - Hongbing Shen
- Department of Epidemiology and Biostatistics, Cancer Research Center of Nanjing Medical University, Nanjing, China
| | - Wei Huang
- Department of Genetics, Chinese National Human Genome Center at Shanghai, Shanghai, China
| | - Daru Lu
- State Key Laboratory of Genetic Engineering and Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
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25
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Jackson LN, Larson SD, Silva SR, Rychahou PG, Chen LA, Qiu S, Rajaraman S, Evers BM. PI3K/Akt activation is critical for early hepatic regeneration after partial hepatectomy. Am J Physiol Gastrointest Liver Physiol 2008; 294:G1401-10. [PMID: 18388186 PMCID: PMC2427188 DOI: 10.1152/ajpgi.00062.2008] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hepatic resection is associated with rapid proliferation and regeneration of the remnant liver. Phosphatidylinositol 3-kinase (PI3K), composed of a p85alpha regulatory and a p110alpha catalytic subunit, participates in multiple cellular processes, including cell growth and survival; however, the role of PI3K in liver regeneration has not been clearly delineated. In this study, we used the potent PI3K inhibitor wortmannin and small interfering RNA (siRNA) targeting the p85alpha and p110alpha subunits to determine whether total or selective PI3K inhibition would abrogate the proliferative response of the liver after partial hepatectomy in mice. Hepatic resection is associated with an induction in PI3K activity; total PI3K blockade with wortmannin and selective inhibition of p85alpha or p110alpha with siRNA resulted in a significant decrease in hepatocyte proliferation, especially at the earliest time points. Fewer macrophages and Kupffer cells were present in the regenerating liver of mice treated with wortmannin or siRNA to p85alpha or p110alpha, as reflected by a paucity of F4/80-positive cells. Additionally, PI3K inhibition led to an aberrant architecture in the regenerating hepatocytes characterized by vacuolization, lipid deposition, and glycogen accumulation; these changes were not noted in the sham livers. Our data demonstrate that PI3K/Akt pathway activation plays a critical role in the early regenerative response of the liver after resection; inhibition of this pathway markedly abrogates the normal hepatic regenerative response, most likely by inhibiting macrophage infiltration and cytokine elaboration and thus hepatocyte priming for replication.
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Affiliation(s)
- Lindsey N. Jackson
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas
| | - Shawn D. Larson
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas
| | | | - Piotr G. Rychahou
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas
| | - L. Andy Chen
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas
| | - Suimin Qiu
- Department of Pathology, The University of Texas Medical Branch, Galveston, Texas
| | - Srinivasan Rajaraman
- Department of Pathology, The University of Texas Medical Branch, Galveston, Texas
| | - B. Mark Evers
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas, Sealy Center for Cancer Cell Biology, The University of Texas Medical Branch, Galveston, Texas
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26
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Black AT, Gray JP, Shakarjian MP, Laskin DL, Heck DE, Laskin JD. Distinct effects of ultraviolet B light on antioxidant expression in undifferentiated and differentiated mouse keratinocytes. Carcinogenesis 2007; 29:219-25. [PMID: 17984112 DOI: 10.1093/carcin/bgm242] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Ultraviolet (UV) B causes oxidative stress, which has been implicated in carcinogenesis. We determined if the sensitivity of keratinocytes to UVB-induced oxidative stress is dependent on their differentiation state. In primary cultures of undifferentiated and differentiated mouse keratinocytes, UVB (25 mJ/cm(2)) stimulated production of reactive oxygen intermediates. This was associated with increased messenger RNA (mRNA) expression of the antioxidant enzymes glutathione peroxidase, heme oxygenase-1 (HO-1) and the glutathione S-transferase (GST), GSTA1-2. The effects of UVB on GSTA1-2 were greater in undifferentiated when compared with differentiated cells. UVB also induced GSTM1, but only in undifferentiated cells. In contrast, UVB reduced expression of manganese superoxide dismutase, metallothionein-2, GSTA3 and microsomal glutathione S-transferase (mGST)3 in both cell types, whereas it had no major effects on catalase, copper-zinc superoxide dismutase, GSTP1, mGST1 or mGST2. Of note, levels of GSTA4 mRNA were 4- to 5-fold greater in differentiated relative to undifferentiated cells. Moreover, whereas GSTA4 was induced by UVB in undifferentiated cells, it was inhibited in differentiated cells. UVB activated p38 and c-jun N-terminal kinase mitogen-activated protein (MAP) kinases in both undifferentiated and differentiated keratinocytes. Whereas inhibition of these kinases blocked UVB-induced HO-1 in both cell types, GSTA1-2 and GST-4 were only suppressed in undifferentiated cells. In differentiated keratinocytes, p38 inhibition also suppressed GSTA1-2. In contrast, MAP kinase inhibition had no major effects on UVB-induced suppression of GSTA4 in differentiated cells. These data indicate that UVB-induced alterations in antioxidant expression are differentiation dependent. Moreover, MAP kinases are critical regulators of this response. Alterations in antioxidants are likely to be important mechanisms for protecting the skin from UVB-induced oxidative stress.
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Affiliation(s)
- Adrienne T Black
- Department of Pharmacology and Toxicology, Rutgers University, 170 Frelinghuysen Road, Piscataway, NJ 08854, USA
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27
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Loor JJ, Everts RE, Bionaz M, Dann HM, Morin DE, Oliveira R, Rodriguez-Zas SL, Drackley JK, Lewin HA. Nutrition-induced ketosis alters metabolic and signaling gene networks in liver of periparturient dairy cows. Physiol Genomics 2007; 32:105-16. [PMID: 17925483 DOI: 10.1152/physiolgenomics.00188.2007] [Citation(s) in RCA: 251] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Dairy cows are highly susceptible after parturition to developing liver lipidosis and ketosis, which are costly diseases to farmers. A bovine microarray platform consisting of 13,257-annotated oligonucleotides was used to study hepatic gene networks underlying nutrition-induced ketosis. On day 5 postpartum, 14 Holstein cows were randomly assigned to ketosis-induction (n = 7) or control (n = 7) groups. Cows in the ketosis-induction group were fed at 50% of day 4 intake until they developed signs of clinical ketosis, and cows in the control group were fed ad libitum throughout the treatment period. Liver was biopsied at 10-14 (ketosis) or 14 days postpartum (controls). Feed restriction increased blood concentrations of nonesterified fatty acids and beta-hydroxybutyrate, but decreased glucose. Liver triacylglycerol concentration also increased. A total of 2,415 genes were altered by ketosis (false discovery rate = 0.05). Ingenuity Pathway Analysis revealed downregulation of genes associated with oxidative phosphorylation, protein ubiquitination, and ubiquinone biosynthesis with ketosis. Other molecular adaptations included upregulation of genes and nuclear receptors associated with cytokine signaling, fatty acid uptake/transport, and fatty acid oxidation. Genes downregulated during ketosis included several associated with cholesterol metabolism, growth hormone signaling, proton transport, and fatty acid desaturation. Feed restriction and ketosis resulted in previously unrecognized alterations in gene network expression underlying key cellular functions and discrete metabolic events. These responses might help explain well-documented physiological adaptations to reduced feed intake in early postpartum cows and, thus, provide molecular targets that might be useful in prevention and treatment of liver lipidosis and ketosis.
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Affiliation(s)
- Juan J Loor
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA.
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28
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Kim SK, Novak RF. The role of intracellular signaling in insulin-mediated regulation of drug metabolizing enzyme gene and protein expression. Pharmacol Ther 2006; 113:88-120. [PMID: 17097148 PMCID: PMC1828071 DOI: 10.1016/j.pharmthera.2006.07.004] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2006] [Accepted: 07/18/2006] [Indexed: 12/28/2022]
Abstract
Endogenous factors, including hormones, growth factors and cytokines, play an important role in the regulation of hepatic drug metabolizing enzyme expression in both physiological and pathophysiological conditions. Diabetes, fasting, obesity, protein-calorie malnutrition and long-term alcohol consumption produce changes in hepatic drug metabolizing enzyme gene and protein expression. This difference in expression alters the metabolism of xenobiotics, including procarcinogens, carcinogens, toxicants and therapeutic agents, potentially impacting the efficacy and safety of therapeutic agents, and/or resulting in drug-drug interactions. Although the mechanisms by which xenobiotics regulate drug metabolizing enzymes have been studied intensively, less is known regarding the cellular signaling pathways and components which regulate drug metabolizing enzyme gene and protein expression in response to hormones and cytokines. Recent findings, however, have revealed that several cellular signaling pathways are involved in hormone- and growth factor-mediated regulation of drug metabolizing enzymes. Our laboratory has reported that insulin and growth factors regulate drug metabolizing enzyme gene and protein expression, including cytochromes P450 (CYP), glutathione S-transferases (GST) and microsomal epoxide hydrolase (mEH), through receptors which are members of the large receptor tyrosine kinase (RTK) family, and by downstream effectors such as phosphatidylinositol 3-kinase, mitogen activated protein kinase (MAPK), Akt/protein kinase B (PKB), mammalian target of rapamycin (mTOR), and the p70 ribosomal protein S6 kinase (p70S6 kinase). Here, we review current knowledge of the signaling pathways implicated in regulation of drug metabolizing enzyme gene and protein expression in response to insulin and growth factors, with the goal of increasing our understanding of how disease affects these signaling pathways, components, and ultimately gene expression and translational control.
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Affiliation(s)
- Sang K. Kim
- Institute of Environmental Health Sciences, Wayne State University, 2727 Second Avenue, Room 4000, Detroit, MI 48201, USA
- College of Pharmacy and Research Center for Transgenic Cloned Pigs, Chungnam National University, Daejeon 305-764, South Korea
| | - Raymond F. Novak
- Institute of Environmental Health Sciences, Wayne State University, 2727 Second Avenue, Room 4000, Detroit, MI 48201, USA
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29
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Ng L, Nichols K, O'Rourke K, Maslen A, Kirby GM. Repression of human GSTA1 by interleukin-1beta is mediated by variant hepatic nuclear factor-1C. Mol Pharmacol 2006; 71:201-8. [PMID: 17021248 DOI: 10.1124/mol.106.028563] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Down-regulation of glutathione transferase A1 (GSTA1) expression has profound implications in cytoprotection against toxic by-products of lipid peroxidation produced during inflammation. We investigated the role of hepatic nuclear factor 1 (HNF-1) in repression of human GSTA1 expression by interleukin (IL)-1beta in Caco-2 cells. In luciferase reporter assays, overexpression of HNF-1alpha increased GSTA1 transcriptional activity via an HNF-1 response element (HRE) in the proximal promoter. In addition, constitutive mRNA levels of GSTA1 and HNF-1alpha rose concurrently in Caco-2 cells with increasing stage of confluence. IL-1beta reduced GSTA1 mRNA levels at all stages of confluence; however, HNF-1alpha mRNA levels were not altered. IL-1beta repressed GSTA1 transcriptional activity, an effect that was abolished by mutating the HRE. Similar results were observed in HT-29 and HepG2 cells. Overexpression of HNF-1alpha did not counteract IL-1beta-mediated repression of GSTA1 transcription either in reporter assays or at the mRNA level. Involvement of the transdominant repressor C isoform of variant HNF-1 (vHNF-1C) in GSTA1 repression was demonstrated, because vHNF-1C overexpression significantly reduced GSTA1 transcriptional activity. Finally, IL-1beta caused concentration-related up-regulation of vHNF-1C mRNA levels and increased binding of vHNF-1C protein to the HRE, whereas HNF-1alpha-HRE complex formation was reduced. These findings indicate that IL-1beta represses GSTA1 transcription via a mechanism involving overexpression of vHNF-1C.
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Affiliation(s)
- Lorraine Ng
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
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30
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Björk K, Saarikoski ST, Arlinde C, Kovanen L, Osei-Hyiaman D, Ubaldi M, Reimers M, Hyytiä P, Heilig M, Sommer WH. Glutathione-S-transferase expression in the brain: possible role in ethanol preference and longevity. FASEB J 2006; 20:1826-35. [PMID: 16940154 DOI: 10.1096/fj.06-5896com] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Identification of genes that are differentially expressed in rats bidirectionally selected for alcohol preference might reveal biological mechanisms underlying alcoholism or related phenotypes. Microarray analysis from medial prefrontal cortex (mPFC), a key brain region for drug reward, indicated increased expression of glutathione-S-transferases of the alpha (Gsta4) and mu (Gstm1-5) classes in ethanol-preferring AA rats compared with nonpreferring ANA rats. Real-time RT polymerase chain reaction (RT-PCR) analysis demonstrated approximately 2-fold higher Gsta4 transcript levels in several brain regions of ethanol-naive AA compared with ANA rats. Differences in mRNA levels were accompanied by differential levels of GSTA4 protein. We identified a novel haplotype variant in the rat Gsta4 gene, defined here as var3. Allele frequencies of var3 were markedly different between AA and ANA rats, 52% and 100%, respectively. Gsta4 expression was strongly correlated with the gene dose of var3, with approximately 60% of the variance in expression accounted for by genotype at this locus. The contribution of glutathione S-transferase expression to the ethanol-preferring phenotype is presently unclear. It could, however, underlie observed differences in life span between AA and ANA lines, prompting a utility of this animal model in aging research.
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Affiliation(s)
- K Björk
- Laboratory of Clinical and Translational Studies, NCI, National Institutes of Health, Bethesda, USA
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31
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Carmona-Cuenca I, Herrera B, Ventura JJ, Roncero C, Fernández M, Fabregat I. EGF blocks NADPH oxidase activation by TGF-beta in fetal rat hepatocytes, impairing oxidative stress, and cell death. J Cell Physiol 2006; 207:322-30. [PMID: 16331683 DOI: 10.1002/jcp.20568] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Epidermal growth factor (EGF) is a survival signal for transforming growth factor-beta (TGF-beta)-induced apoptosis in hepatocytes, phosphatidylinositol 3-kinase (PI 3-K) being involved in this effect. Here, we analyze the possible cross talks between EGF and TGF-beta signals to understand how EGF impairs the early pro-apoptotic events induced by TGF-beta. Data have indicated that neither SMAD nor c-Jun NH2 Terminal Kinase (JNK) activations are altered by EGF, which clearly interferes with events directly related to the radical oxygen species (ROS) production, impairing oxidative stress, p38 MAP kinase activation, and cell death. Activation of a NADPH-oxidase-like system, which is responsible for the early ROS production by TGF-beta, is completely inhibited by EGF, through a PI 3-K-dependent mechanism. Activity of RAC1 increases by TGF-beta, but also by EGF, and both act synergistically to get maximum effects. Fetal rat hepatocytes express nox4, in addition to nox1 and nox2, and TGF-beta clearly upregulates nox4. EGF blocks up-regulation of nox4 by TGF-beta. Interestingly, in the presence of PI 3-K inhibitors, EGF is not able to counteract the nox4 upregulation by TGF-beta. Taking together these results indicate that impairment of TGF-beta-induced NADPH oxidase activation by EGF is a RAC1-independent process and correlates with an inhibition of the mechanisms that address the increase of nox4 mRNA levels by TGF-beta.
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Affiliation(s)
- Irene Carmona-Cuenca
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
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32
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Desmots F, Loyer P, Rissel M, Guillouzo A, Morel F. Activation of C-Jun N-terminal kinase is required for glutathione transferase A4 induction during oxidative stress, not during cell proliferation, in mouse hepatocytes. FEBS Lett 2005; 579:5691-6. [PMID: 16223495 DOI: 10.1016/j.febslet.2005.08.088] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2005] [Accepted: 08/30/2005] [Indexed: 11/19/2022]
Abstract
Expression of the mouse glutathione transferase Alpha 4 (mGSTA4) has been studied during hepatocyte isolation and in cultured hepatocytes. Transient mGSTA4 induction during liver disruption correlated to strong oxidative stress and induction of the Jun N-terminal kinase (JNK) pathway. Similarly, tumor necrosis factor alpha induced both JNK phosphorylation and mGSTA4 expression while specific JNK inhibitor JNKI1 prevented these two events and JNK activator anisomycin strongly induced mGSTA4 expression. We also found that endogenous JNK and mGSTA4 co-immunoprecipitate. A second mGSTA4 induction occurred 2 days after cell seeding concomitantly to DNA replication and was prevented by treatment with mitogen-activated protein kinase (MEK) inhibitor U0126. Our data demonstrate that mGSTA4 is strongly increased during oxidative stress possibly via JNK pathway and during proliferation via MEK/extracellular signal-regulated kinase pathway, and suggest that mGSTA4 might be an endogenous regulator of JNK activity by direct binding.
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33
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Edalat M, Mannervik B, Axelsson LG. Selective expression of detoxifying glutathione transferases in mouse colon: effect of experimental colitis and the presence of bacteria. Histochem Cell Biol 2005; 122:151-9. [PMID: 15309552 DOI: 10.1007/s00418-004-0688-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Glutathione transferases (GSTs) play a central role in the cellular defense against harmful endogenous compounds and xenobiotics in mouse and man. The gastrointestinal channel is constantly exposed to bacteria, bacterial products, and xenobiotics. In the present study the distribution of alpha, mu, and pi class GSTs was examined immunohistologically in the colon of conventional and germ-free (GF) mice subjected to experimental colitis. The tissues samples were from conventional mice with and without colitis induced by dextran sulfate sodium (DSS); GF mice treated with DSS or carrageenan; and GF mice inoculated with normal mouse bacterial flora as well as with Lactobacillus GG. In conventional as well as in GF mice the mu and pi class GSTs showed reduced intestinal expression when colitis was induced. In con-rast, the level of GSTs reacting with antibodies directed against the alpha class, in particular mGST A4-4, was elevated after induction of inflammation. Of special interest is mGST A4-4 because of its high catalytic activity with toxic products of lipid peroxidation. In the colon of conventionalized GF mice that were given mouse intestinal flora, the mGST A4-4 expression was increased with time for several weeks, but then showed a decrease to a normal level. Additionally, the inoculation of GF mice with Lactobacillus GG induced all the intestinal GSTs studied.
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Affiliation(s)
- Maryam Edalat
- Department of Biochemistry, Biomedical Center, Uppsala University, Box 576, 751 23 Uppsala, Sweden
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34
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Herrera B, Alvarez AM, Beltrán J, Valdés F, Fabregat I, Fernández M. Resistance to TGF-beta-induced apoptosis in regenerating hepatocytes. J Cell Physiol 2004; 201:385-92. [PMID: 15389556 DOI: 10.1002/jcp.20078] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Treatment with transforming growth factor beta (TGF-beta) of hepatocytes from two different proliferative conditions, such as fetal development and adult liver regeneration, shows that regenerating cells respond to this cytokine in terms of growth inhibition, but are less sensitive than the fetal ones to the apoptosis induced by this factor. Regenerating TGF-beta treated cells show higher cell viability and lower percentage of apoptotic cells than the fetal treated ones. Furthermore, TGF-beta treated regenerating hepatocytes maintain a well-preserved parenchyma-like organization. Treatment with TGF-beta induces the loss of mitochondrial transmembrane potential in fetal but not in regenerating hepatocytes and activation of caspase-3 is lower in regenerating than in fetal cells. Regenerating hepatocytes show higher intracellular levels of some antiapoptotic proteins, such as Bcl-x(L) and c-IAP-1 and, interestingly, they present higher intracellular glutathione levels, which might provide of mechanisms to avoid potential dangerous effects of the oxidative stress-mediated apoptosis induced by TGF-beta. In fact, treatment with BSO (a glutathione synthesis inhibitor) restores the response of regenerating hepatocytes to TGF-beta in terms of cell death. In conclusion, increased levels of Bcl-x(L) and cIAP-1 and higher intracellular glutathione levels could confer resistance to the apoptosis induced by TGF-beta during liver regeneration.
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Affiliation(s)
- Blanca Herrera
- Departamento de Bioquímica y Biología Molecular, Instituto de Bioquímica, Centro Mixto CSIC/UCM, Madrid, Spain
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35
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Morel F, Rauch C, Petit E, Piton A, Theret N, Coles B, Guillouzo A. Gene and Protein Characterization of the Human Glutathione S-Transferase Kappa and Evidence for a Peroxisomal Localization. J Biol Chem 2004; 279:16246-53. [PMID: 14742434 DOI: 10.1074/jbc.m313357200] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Kappa class glutathione S-transferase (GST) cDNA sequences have been identified in rat, mouse, and human. In the present study, we determined the structure and chromosomal location of the human GST Kappa 1 (hGSTK1) gene, characterized the protein, and demonstrated its subcellular localization. The human gene spans approximately 5 kb, has 8 exons, and maps onto chromosome 7q34. The 5'-flanking region lacks TATA or CCAAT boxes, but there is an initiator element overlapping the transcription start site. hGSTK1 amino acid sequence showed homology to bacterial 2-hydroxychromene-2-carboxylate isomerase, an enzyme involved in naphthalene degradation pathway. hGSTK1 mRNA was expressed in all of the organs examined. Subcellular fractionation of HepG2 cells showed that the protein was located in peroxisomes and mitochondria and was not detectable in cytoplasm. The peroxisomal localization was confirmed by transfection of HepG2 cells with a plasmid coding a green fluorescent protein fused inframe to the N terminus of hGSTK1. The C terminus of hGSTK1 was essential for localization of the protein to peroxisomes, and the C-terminal sequence Ala-Arg-Leu represents a peroxisome targeting signal. This is the first time that a human GST has been found in peroxisomes, suggesting a new function for this family of enzymes.
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Affiliation(s)
- Fabrice Morel
- INSERM U456, Université de Rennes I, 2 Avenue du Professeur Léon Bernard, 35043 Rennes, France.
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36
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Morceau F, Duvoix A, Delhalle S, Schnekenburger M, Dicato M, Diederich M. Regulation of glutathione S-transferase P1-1 gene expression by NF-kappaB in tumor necrosis factor alpha-treated K562 leukemia cells. Biochem Pharmacol 2004; 67:1227-38. [PMID: 15013838 DOI: 10.1016/j.bcp.2003.10.036] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2003] [Accepted: 10/20/2003] [Indexed: 01/13/2023]
Abstract
Glutathione S-transferases (GSTs) play an important role in the protection of cells against xenobiotics and lipid hydroperoxides generated by oxidative stress. In human, the GSTP1-1 expression is commonly increased in many tumors and involved in the development of antineoplastic drug resistance. Reactive oxygen species are released at inflammation sites and oxidative stress conditions enhance the expression of genes encoding antioxidant enzymes such as GSTs. Here we investigated the regulation of the GSTP1-1 gene expression in the K562 cell line by nuclear factor kappaB (NF-kappaB) and the pro-inflammatory cytokine tumor necrosis factor alpha (TNFalpha). By studying GSTP1-1 mRNA expression and NF-kappaB/GSTP1-1 promoter interactions, we showed the implication of NF-kappaB in the GSTP1-1 gene expression and we described a new specific TNFalpha-inducible NF-kappaB binding site upstream of the minimal promoter. Moreover, TNFalpha treatment as well as cotransfection of NF-kappaB signaling pathway intermediates induced an activation of the GSTP1-1 gene promoter in K562 cells. Site-directed mutagenesis of the NF-kappaB site strongly inhibited TNFalpha- and NF-kappaBp65-induced promoter activation. Altogether, we showed that a sequence located at -323/-314 within the GSTP1-1 promoter bound NF-kappaB p50/65 and p65/p65 dimers and that this kappaB site was involved in the regulation of the gene by TNFalpha.
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Affiliation(s)
- Franck Morceau
- Laboratoire de Recherche sur le Cancer et les Maladies du Sang, Centre Universitaire de Luxembourg, 162A Avenue de la Faïencerie, Luxembourg L-1511, Luxembourg
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Gilot D, Loyer P, Corlu A, Glaise D, Lagadic-Gossmann D, Atfi A, Morel F, Ichijo H, Guguen-Guillouzo C. Liver protection from apoptosis requires both blockage of initiator caspase activities and inhibition of ASK1/JNK pathway via glutathione S-transferase regulation. J Biol Chem 2002; 277:49220-9. [PMID: 12370186 DOI: 10.1074/jbc.m207325200] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Hepatoprotection mediated by free radical scavenging molecules such as dimethyl sulfoxide (Me(2)SO) arose the question as to whether this effect involved one or several anti-apoptotic signals. Here, using primary cultures of rat hepatocytes and in vivo thioacetamide-induced liver failure, we showed that Me(2)SO failed to prevent any cleavage of initiator caspase-8 and -9 but constantly inhibited procaspase-3 maturation and apoptosis execution, pointing to an efficient inhibition of cleaved initiator caspase activities. Evidence was recently provided that apoptosis might require both caspase and ASK1/JNK-p38 activities. We demonstrated that this kinase pathway was strongly inhibited in the presence of Me(2)SO whereas overexpression of ASK1 was able to restore caspase-3 activity and apoptosis. Interestingly, we also found that GST M1/2 and GST Alpha1/2 dropped under apoptotic conditions; furthermore transfection of GST M1, A1, or P1 to cells overexpressing ASK1, abolished caspase-3 activity and restored viability. This role of GSTs was further assessed by showing that their high expression level was tightly associated with inhibition of ASK1 activity in Me(2)SO-protected hepatocytes. Together, these results demonstrate that Me(2)SO-mediated hepatoprotection involves a dual inhibition of cleaved initiator caspase and ASK1/JNK-p38 activities. Furthermore, in highlighting the control of apoptosis by GSTs, these data provide new insights for analyzing the complex mechanisms of hepatoprotection.
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Affiliation(s)
- David Gilot
- INSERM U522, Régulation des Equilibres fonctionnels du foie Normal et Pathologique, Avenue de la Bataille Flandre/Dunkerque, Hôpital Pontchaillou, 35033 Rennes, France.
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