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Wakil A, Niazi M, Lunsford KE, Pyrsopoulos N. Future Approaches and Therapeutic Modalities for Acute-on-Chronic Liver Failure. Clin Liver Dis 2023; 27:777-790. [PMID: 37380297 DOI: 10.1016/j.cld.2023.03.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Acute-on-chronic liver failure (ACLF) results from an acute decompensation of cirrhosis due to exogenous insult. The condition is characterized by a severe systemic inflammatory response, inappropriate compensatory anti-inflammatory response, multisystem extrahepatic organ failure, and high short-term mortality. Here, the authors evaluate the current status of potential treatments for ACLF and assess their efficacy and therapeutic potential.
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Affiliation(s)
- Ali Wakil
- Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H536, Newark, NJ 07103, USA
| | - Mumtaz Niazi
- Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H536, Newark, NJ 07103, USA
| | - Keri E Lunsford
- Department of Surgery, Division of Liver Transplant and HPB Surgery, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H536, Newark, NJ 07103, USA
| | - Nikolaos Pyrsopoulos
- Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB H536, Newark, NJ 07103, USA.
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Ramhøj L, Axelstad M, Baert Y, Cañas-Portilla AI, Chalmel F, Dahmen L, De La Vieja A, Evrard B, Haigis AC, Hamers T, Heikamp K, Holbech H, Iglesias-Hernandez P, Knapen D, Marchandise L, Morthorst JE, Nikolov NG, Nissen ACVE, Oelgeschlaeger M, Renko K, Rogiers V, Schüürmann G, Stinckens E, Stub MH, Torres-Ruiz M, Van Duursen M, Vanhaecke T, Vergauwen L, Wedebye EB, Svingen T. New approach methods to improve human health risk assessment of thyroid hormone system disruption-a PARC project. FRONTIERS IN TOXICOLOGY 2023; 5:1189303. [PMID: 37265663 PMCID: PMC10229837 DOI: 10.3389/ftox.2023.1189303] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 05/05/2023] [Indexed: 06/03/2023] Open
Abstract
Current test strategies to identify thyroid hormone (TH) system disruptors are inadequate for conducting robust chemical risk assessment required for regulation. The tests rely heavily on histopathological changes in rodent thyroid glands or measuring changes in systemic TH levels, but they lack specific new approach methodologies (NAMs) that can adequately detect TH-mediated effects. Such alternative test methods are needed to infer a causal relationship between molecular initiating events and adverse outcomes such as perturbed brain development. Although some NAMs that are relevant for TH system disruption are available-and are currently in the process of regulatory validation-there is still a need to develop more extensive alternative test batteries to cover the range of potential key events along the causal pathway between initial chemical disruption and adverse outcomes in humans. This project, funded under the Partnership for the Assessment of Risk from Chemicals (PARC) initiative, aims to facilitate the development of NAMs that are specific for TH system disruption by characterizing in vivo mechanisms of action that can be targeted by in embryo/in vitro/in silico/in chemico testing strategies. We will develop and improve human-relevant in vitro test systems to capture effects on important areas of the TH system. Furthermore, we will elaborate on important species differences in TH system disruption by incorporating non-mammalian vertebrate test species alongside classical laboratory rat species and human-derived in vitro assays.
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Affiliation(s)
- Louise Ramhøj
- Research Group for Molecular and Reproductive Toxicology, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Marta Axelstad
- Research Group for Molecular and Reproductive Toxicology, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Yoni Baert
- Department In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel, Jette, Belgium
| | - Ana I. Cañas-Portilla
- Environmental Toxicology Unit from National Center for Environmental Health (CNSA), Endocrine Tumor Unit from UFIEC, Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Frédéric Chalmel
- Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail), Rennes, France
| | - Lars Dahmen
- Department Experimental Toxicology and ZEBET, German Centre for the Protection of Laboratory Animals (Bf3R), German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Antonio De La Vieja
- Environmental Toxicology Unit from National Center for Environmental Health (CNSA), Endocrine Tumor Unit from UFIEC, Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Bertrand Evrard
- Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail), Rennes, France
| | - Ann-Cathrin Haigis
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Timo Hamers
- Amsterdam Institute for Life and Environment (A-LIFE), Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Kim Heikamp
- Amsterdam Institute for Life and Environment (A-LIFE), Vrije Universiteit Amsterdam, Amsterdam, Netherlands
- Centre for Health Protection (GZB), National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Henrik Holbech
- Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Patricia Iglesias-Hernandez
- Environmental Toxicology Unit from National Center for Environmental Health (CNSA), Endocrine Tumor Unit from UFIEC, Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Dries Knapen
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Lorna Marchandise
- Department In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel, Jette, Belgium
| | - Jane E. Morthorst
- Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Nikolai Georgiev Nikolov
- Group for Chemical Risk Assessment and GMO, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Ana C. V. E. Nissen
- Group for Chemical Risk Assessment and GMO, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Michael Oelgeschlaeger
- Department Experimental Toxicology and ZEBET, German Centre for the Protection of Laboratory Animals (Bf3R), German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Kostja Renko
- Department Experimental Toxicology and ZEBET, German Centre for the Protection of Laboratory Animals (Bf3R), German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Vera Rogiers
- Department In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel, Jette, Belgium
| | - Gerrit Schüürmann
- UFZ Department of Ecological Chemistry, Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - Evelyn Stinckens
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Mette H. Stub
- Research Group for Molecular and Reproductive Toxicology, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Monica Torres-Ruiz
- Environmental Toxicology Unit from National Center for Environmental Health (CNSA), Endocrine Tumor Unit from UFIEC, Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Majorie Van Duursen
- Amsterdam Institute for Life and Environment (A-LIFE), Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tamara Vanhaecke
- Department In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel, Jette, Belgium
| | - Lucia Vergauwen
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Eva Bay Wedebye
- Group for Chemical Risk Assessment and GMO, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Terje Svingen
- Research Group for Molecular and Reproductive Toxicology, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
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Ma L, Liu S, Xing H, Jin Z. Research progress on short-term prognosis of acute-on-chronic liver failure. Expert Rev Gastroenterol Hepatol 2023; 17:45-57. [PMID: 36597928 DOI: 10.1080/17474124.2023.2165063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Acute-on-chronic liver failure (ACLF) is a clinical syndrome characterized as a severe condition with rapid progression, poor therapeutic response and poor prognosis. Early and timely evaluation of the prognosis is helpful for providing appropriate clinical intervention and prolonging patient survival. AREAS COVERED Currently, there are no specific dynamic and comprehensive approaches to assess the prognosis of patients with ACLF. This article reviews the progress in evaluating the short-term prognosis of ACLF to provide future directions for more dynamic prospective large-scale multicenter studies and a basis for individualized and precise treatment for ACLF patients. We searched PubMed and Web of Science with the term 'acute on chronic liver failure' and 'prognosis.' There was no date or language restriction, and our final search was on 26 October 2022. EXPERT OPINION ACLF is a dynamic process, and the best prognostic marker is the clinical evolution of organ failure over time. New prognostic markers are developing not only in the fields of genetics and histology but also toward diversification combined with imaging. Determining which patients will benefit from continued advanced life support is a formidable challenge, and accurate short-term prognostic assessments of ACLF are a good approach to addressing this issue.
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Affiliation(s)
- Luyao Ma
- Department of Hepatopancreatobiliary Medicine, The Second Hospital of Jilin University, Changchun City, Jilin Province, China
| | - Siqi Liu
- Department of Hepatopancreatobiliary Medicine, The Second Hospital of Jilin University, Changchun City, Jilin Province, China
| | - Hao Xing
- Department of Hepatopancreatobiliary Medicine, The Second Hospital of Jilin University, Changchun City, Jilin Province, China
| | - Zhenjing Jin
- Department of Hepatopancreatobiliary Medicine, The Second Hospital of Jilin University, Changchun City, Jilin Province, China
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The assessment of mesenchymal stem cells therapy in acute on chronic liver failure and chronic liver disease: a systematic review and meta-analysis of randomized controlled clinical trials. Stem Cell Res Ther 2022; 13:204. [PMID: 35578365 PMCID: PMC9109309 DOI: 10.1186/s13287-022-02882-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/04/2022] [Indexed: 11/29/2022] Open
Abstract
Background Mesenchymal stem cells (MSCs) therapy is showing potential therapeutic effects on liver function improvement in patients with chronic liver disease; however, the consensus on efficacy and safety of MSCs has not been reached. Methods We performed this systematic review and meta-analysis of randomized controlled trials (RCTs) to evaluate the efficacy and safety of MSCs therapy for patients with chronic liver disease. A detailed search of the Cochrane Library, MEDLINE, Web of Science, and EMBASE databases was conducted to find studies published prior to September 15, 2021. The outcome measures were survival rate, model of end-stage liver disease (MELD) score, albumin, total bilirubin, coagulation function, and aminotransferase. Results A literature search resulted in 892 citations. Of these, 12 studies met the inclusion criteria. It was found that compared with conventional treatment, MSCs therapy was associated with improved liver function including the MELD score, albumin levels, and coagulation function. However, it had no obvious beneficial effects on survival rate and aminotransferase levels. Subgroup analyses indicated that MSCs therapy had therapeutic effects on patients with both acute on chronic liver failure (ACLF) and cirrhosis. BM-MSCs and UC-MSCs treatment had similar efficacy to improve liver function. The effectiveness varied slightly between the peripheral intravenous injection and hepatic arterial injection. Five studies reported that the only adverse event of the MSCs therapy was fever, and no serious adverse events and side effects were reported. Analysis on clinical symptoms showed that encephalopathy and gastrointestinal hemorrhage events were reduced after MSCs therapy. Conclusions In conclusion, this study suggested that MSCs therapy could be a potential therapeutic alternative for patients with chronic liver disease in clinical practice. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02882-4.
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Laporta J, Dado-Senn B, Skibiel AL. Late gestation hyperthermia: epigenetic programming of daughter's mammary development and function. Domest Anim Endocrinol 2022; 78:106681. [PMID: 34600221 DOI: 10.1016/j.domaniend.2021.106681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 12/30/2022]
Abstract
Exposure to stressors during early developmental windows, such as prenatally (i.e., in utero), can have life-long implications for an animal's health and productivity. The mammary gland starts developing in utero and, like other developing tissues and organs, may undergo fetal programming. Previous research has implicated factors, such as prenatal exposure to endocrine disruptors or alterations in maternal diet (e.g., maternal over or undernutrition), that can influence the developmental trajectory of the offspring mammary gland in postnatal life. However, the direct links between prenatal insults and future productive outcomes are less documented in livestock species. Research on in utero hyperthermia effects on early-life mammary development is scarce. This review will provide an overview of key developmental milestones taking place in the bovine mammary gland during the pre- and postnatal stages. We will showcase how intrauterine hyperthermia, experienced by the developing fetus during the last trimester of gestation, derails postnatal mammary gland development and impairs its synthetic capacity later in life. We will provide insights into the underlying histological, cellular, and molecular mechanisms taking place at key postnatal developmental life stages, including birth, weaning and the first lactation, that might explain permanent detriments in productivity long after the initial exposure to hyperthermia. Collectively, our studies indicate that prenatal hyperthermia jeopardizes the normal developmental trajectory of the mammary gland from fetal development to lactation. Further, in utero hyperthermia epigenetically programs the udder, and possibly other organs critical to lactation, yielding a less resilient and less productive cow for multiple lactations.
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Affiliation(s)
- J Laporta
- Department of Animal and Dairy Sciences, University of Wisconsin, Madison, USA.
| | - B Dado-Senn
- Department of Animal and Dairy Sciences, University of Wisconsin, Madison, USA
| | - A L Skibiel
- Department of Animal, Veterinary and Food Sciences, University of Idaho, Idaho, USA
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Yuan F, Wang N, Chen Y, Huang X, Yang Z, Xu Y, You K, Zhang J, Wang G, Zhuang Y, Pan T, Xiong Y, Yu X, Yang F, Li Y. Calcitriol promotes the maturation of hepatocyte-like cells derived from human pluripotent stem cells. J Steroid Biochem Mol Biol 2021; 211:105881. [PMID: 33766737 DOI: 10.1016/j.jsbmb.2021.105881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 03/07/2021] [Accepted: 03/18/2021] [Indexed: 11/23/2022]
Abstract
Human hepatocyte-like cells (HLCs) derived from human pluripotent stem cells (hPSCs) represent a promising cell source for the assessment of hepatotoxicity and pharmaceutical safety testing. However, the hepatic functionality of HLCs remains significantly inferior to primary human hepatocytes. The bioactive vitamin D (VD), calcitriol, promotes the differentiation of many types of cells, and its deficiency is correlated to the severity of liver diseases. Whether calcitriol contributes to the differentiation of HLCs needs to be explored. Here, we found that the supplementation of calcitriol improved the functionalities of hPSCs-derived HLCs in P450 activities, urea production, and albumin secretion. Moreover, calcitriol also enhanced mitochondrial respiratory function with increased protein expression levels of the subunit of respiratory enzyme complexes in HLCs. Further analyses showed that the mitochondrial biogenesis regulators and mitophagy were increased by calcitriol, thus improving the mitochondrial quality. These improvements in functionality and mitochondrial condition were dependent on vitamin D receptor (VDR) because the improvements were abolished under VDR-deficient conditions. Our finding provides a cost-effective chemical process for HLC maturation to meet the demand for basic research and potential clinic applications.
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Affiliation(s)
- Fang Yuan
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; School of Life Sciences, University of Science and Technology of China, 230027, Hefei, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Ning Wang
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Yan Chen
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Xinping Huang
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Zhen Yang
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Yingying Xu
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Kai You
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Jiaye Zhang
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Guodong Wang
- The First Affiliated Hospital of Sun Yat-sen University, 510080, Guangzhou, China
| | - Yuanqi Zhuang
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Tingcai Pan
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Yue Xiong
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Xiaorui Yu
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; School of Life Sciences, University of Science and Technology of China, 230027, Hefei, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Fan Yang
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Yinxiong Li
- Institute of Public Health, Guangzhou Institutes of Biomedicine and Health, Chinese, Academy of Sciences, 510530, Guangzhou, China; Key Laboratory of Regenerative Biology, South China Institute for Stem Cell, Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China; Guangdong Provincial Key Laboratory of Biocomputing, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, Guangzhou, China.
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Shin HS, Lee Y, Shin MH, Cho SI, Zouboulis CC, Kim MK, Lee DH, Chung JH. Histone Deacetylase 1 Reduces Lipogenesis by Suppressing SREBP1 Transcription in Human Sebocyte Cell Line SZ95. Int J Mol Sci 2021; 22:ijms22094477. [PMID: 33922983 PMCID: PMC8123291 DOI: 10.3390/ijms22094477] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/16/2021] [Accepted: 04/23/2021] [Indexed: 01/19/2023] Open
Abstract
Proper regulation of sebum production is important for maintaining skin homeostasis in humans. However, little is known about the role of epigenetic regulation in sebocyte lipogenesis. We investigated histone acetylation changes and their role in key lipogenic gene regulation during sebocyte lipogenesis using the human sebaceous gland cell line SZ95. Sebocyte lipogenesis is associated with a significant increase in histone acetylation. Treatment with anacardic acid (AA), a p300 histone acetyltransferase inhibitor, significantly decreased the lipid droplet number and the expression of key lipogenic genes, including sterol regulatory-binding protein 1 (SREBP1), fatty acid synthase (FAS), and acetyl-CoA carboxylase (ACC). In contrast, treatment with trichostatin A (TSA), a histone deacetylase (HDAC) inhibitor, increased the expression of these genes. Global HDAC enzyme activity was decreased, and HDAC1 and HDAC2 expression was downregulated during sebaceous lipogenesis. Interestingly, HDAC1 knockdown increased lipogenesis through SREBP1 induction, whereas HDAC1 overexpression decreased lipogenesis and significantly suppressed SREBP1 promoter activity. HDAC1 and SREBP1 levels were inversely correlated in human skin sebaceous glands as demonstrated in immunofluorescence images. In conclusion, HDAC1 plays a critical role in reducing SREBP1 transcription, leading to decreased sebaceous lipogenesis. Therefore, HDAC1 activation could be an effective therapeutic strategy for skin diseases related to excessive sebum production.
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Affiliation(s)
- Hye Sun Shin
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Department of Biomedical Sciences, Graduate School, Seoul National University, Seoul 03080, Korea
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
| | - Yuri Lee
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Department of Biomedical Sciences, Graduate School, Seoul National University, Seoul 03080, Korea
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
| | - Mi Hee Shin
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
| | - Soo Ick Cho
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
| | - Christos C. Zouboulis
- Dessau Medical Center, Departments of Dermatology, Venereology, Allergology and Immunology, Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, 06847 Dessau, Germany;
| | - Min Kyoung Kim
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
- Correspondence: (M.-K.K.); (D.H.L.); (J.H.C.)
| | - Dong Hun Lee
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
- Correspondence: (M.-K.K.); (D.H.L.); (J.H.C.)
| | - Jin Ho Chung
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Korea; (H.S.S.); (Y.L.); (M.H.S.); (S.I.C.)
- Department of Biomedical Sciences, Graduate School, Seoul National University, Seoul 03080, Korea
- Medical Research Center, Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Korea
- Institute on Aging, Seoul National University, Seoul 03080, Korea
- Correspondence: (M.-K.K.); (D.H.L.); (J.H.C.)
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Piazzon MC, Mladineo I, Dirks RP, Santidrián Yebra-Pimentel E, Hrabar J, Sitjà-Bobadilla A. Ceratothoa oestroides Infection in European Sea Bass: Revealing a Long Misunderstood Relationship. Front Immunol 2021; 12:645607. [PMID: 33777043 PMCID: PMC7991915 DOI: 10.3389/fimmu.2021.645607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 02/05/2021] [Indexed: 12/16/2022] Open
Abstract
Ceratothoa oestroides (Cymothoidea, Isopoda) is a generalist crustacean parasite that negatively affects the economic sustainability of European sea bass (Dicentrarchus labrax) aquaculture in the North-East Mediterranean. While mortalities are observed in fry and fingerlings, infection in juvenile and adult fish result in approximately 20% growth delay. A transcriptomic analysis (PCR array, RNA-Seq) was performed on organs (tongue, spleen, head kidney, and liver) from infected vs. Ceratothoa-free sea bass fingerlings. Activation of local and systemic immune responses was detected, particularly in the spleen, characterized by the upregulation of cytokines (also in the tongue), a general reshaping of the immunoglobulin (Ig) response and suppression of T-cell mediated responses. Interestingly, starvation and iron transport and metabolism genes were strongly downregulated, suggesting that the parasite feeding strategy is not likely hematophagous. The regulation of genes related to growth impairment and starvation supported the growth delay observed in infected animals. Most differentially expressed (DE) transcripts were exclusive of a specific organ; however, only in the tongue, the difference between infected and uninfected fish was significant. At the attachment/feeding site, the pathways involved in muscle contraction and intercellular junction were the most upregulated, whereas the pathways involved in fibrosis (extracellular matrix organization, collagen formation, and biosynthesis) were downregulated. These results suggest that parasite-inflicted damage is successfully mitigated by the host and characterized by regenerative processes that prevail over the reparative ones.
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Affiliation(s)
- M Carla Piazzon
- Fish Pathology Group, Institute of Aquaculture Torre de la Sal - Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellón, Spain
| | - Ivona Mladineo
- Laboratory for Aquaculture, Institute of Oceanography and Fisheries, Split, Croatia.,Biology Centre of the Czech Academy of Sciences, Institute of Parasitology, Ceske Budejovice, Czechia
| | - Ron P Dirks
- Future Genomics Technology, Leiden, Netherlands
| | | | - Jerko Hrabar
- Laboratory for Aquaculture, Institute of Oceanography and Fisheries, Split, Croatia
| | - Ariadna Sitjà-Bobadilla
- Fish Pathology Group, Institute of Aquaculture Torre de la Sal - Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellón, Spain
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9
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Bolleyn J, Rombaut M, Nair N, Branson S, Heymans A, Chuah M, VandenDriessche T, Rogiers V, De Kock J, Vanhaecke T. Genetic and Epigenetic Modification of Rat Liver Progenitor Cells via HNF4α Transduction and 5' Azacytidine Treatment: An Integrated miRNA and mRNA Expression Profile Analysis. Genes (Basel) 2020; 11:genes11050486. [PMID: 32365562 PMCID: PMC7291069 DOI: 10.3390/genes11050486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 12/17/2022] Open
Abstract
Neonatal liver-derived rat epithelial cells (rLEC) from biliary origin are liver progenitor cells that acquire a hepatocyte-like phenotype upon sequential exposure to hepatogenic growth factors and cytokines. Undifferentiated rLEC express several liver-enriched transcription factors, including the hepatocyte nuclear factors (HNF) 3β and HNF6, but not the hepatic master regulator HNF4α. In this study, we first investigated the impact of the ectopic expression of HNF4α in rLEC on both mRNA and microRNA (miR) level by means of microarray technology. We found that HNF4α transduction did not induce major changes to the rLEC phenotype. However, we next investigated the influence of DNA methyl transferase (DNMT) inhibition on the phenotype of undifferentiated naïve rLEC by exposure to 5′ azacytidine (AZA), which was found to have a significant impact on rLEC gene expression. The transduction of HNF4α or AZA treatment resulted both in significantly downregulated C/EBPα expression levels, while the exposure of the cells to AZA had a significant effect on the expression of HNF3β. Computationally, dysregulated miRNAs were linked to target mRNAs using the microRNA Target Filter function of Ingenuity Pathway Analysis. We found that differentially regulated miRNA–mRNA target associations predict ectopic HNF4α expression in naïve rLEC to interfere with cell viability and cellular maturation (miR-19b-3p/NR4A2, miR30C-5p/P4HA2, miR328-3p/CD44) while it predicts AZA exposure to modulate epithelial/hepatic cell proliferation, apoptosis, cell cycle progression and the differentiation of stem cells (miR-18a-5p/ESR1, miR-503-5p/CCND1). Finally, our computational analysis predicts that the combination of HNF4α transduction with subsequent AZA treatment might cause changes in hepatic cell proliferation and maturation (miR-18a-5p/ESR1, miR-503-5p/CCND1, miR-328-3p/CD44) as well as the apoptosis (miR-16-5p/BCL2, miR-17-5p/BCL2, miR-34a-5p/BCL2 and miR-494-3p/HMOX1) of naïve rLEC.
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Affiliation(s)
- Jennifer Bolleyn
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
| | - Matthias Rombaut
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
| | - Nisha Nair
- Department of Gene Therapy and Regenerative Medicine (GTRM), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (N.N.); (M.C.); (T.V.)
| | - Steven Branson
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
| | - Anja Heymans
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
| | - Marinee Chuah
- Department of Gene Therapy and Regenerative Medicine (GTRM), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (N.N.); (M.C.); (T.V.)
| | - Thierry VandenDriessche
- Department of Gene Therapy and Regenerative Medicine (GTRM), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (N.N.); (M.C.); (T.V.)
| | - Vera Rogiers
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
| | - Joery De Kock
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
- Correspondence: ; Tel.: +32-2-477-4517; Fax: +32-2-477-4582
| | - Tamara Vanhaecke
- Department of In Vitro Toxicology and Dermato-cosmetology (IVTD), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium; (J.B.); (M.R.); (S.B.); (A.H.); (V.R.); (T.V.)
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10
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Ruoß M, Vosough M, Königsrainer A, Nadalin S, Wagner S, Sajadian S, Huber D, Heydari Z, Ehnert S, Hengstler JG, Nussler AK. Towards improved hepatocyte cultures: Progress and limitations. Food Chem Toxicol 2020; 138:111188. [PMID: 32045649 DOI: 10.1016/j.fct.2020.111188] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 01/31/2020] [Accepted: 02/07/2020] [Indexed: 12/14/2022]
Abstract
Hepatotoxicity is among the most frequent reasons for drug withdrawal from the market. Therefore, there is an urgent need for reliable predictive in vitro tests, which unfailingly identify hepatotoxic drug candidates, reduce drug development time, expenses and the number of test animals. Currently, human hepatocytes represent the gold standard. However, the use of hepatocytes is challenging since the cells are not constantly available and lose their metabolic activity in culture. To solve these problems many different approaches have been developed in the past decades. The aim of this review is to present these approaches and to discuss the possibilities and limitations as well as future opportunities and directions.
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Affiliation(s)
- Marc Ruoß
- Department of Traumatology, Siegfried Weller Institute, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Massoud Vosough
- Department of Regenerative Medicine, Cell Science Research Centre, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Alfred Königsrainer
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - Silvio Nadalin
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - Silvia Wagner
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - Sahar Sajadian
- Department of Traumatology, Siegfried Weller Institute, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Diana Huber
- Department of Traumatology, Siegfried Weller Institute, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Zahra Heydari
- Department of Regenerative Medicine, Cell Science Research Centre, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Sabrina Ehnert
- Department of Traumatology, Siegfried Weller Institute, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Jan G Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Technical University of Dortmund, Dortmund, Germany
| | - Andreas K Nussler
- Department of Traumatology, Siegfried Weller Institute, Eberhard Karls University Tübingen, Tübingen, Germany.
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11
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Dahl GE, Skibiel AL, Laporta J. In Utero Heat Stress Programs Reduced Performance and Health in Calves. Vet Clin North Am Food Anim Pract 2019; 35:343-353. [PMID: 31103186 DOI: 10.1016/j.cvfa.2019.02.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Heat stress during late gestation adversely impacts the developing calf. Calves that experience heat stress are born at a lower bodyweight and those deficits persist at least until puberty. In utero heat stress reduces passive transfer and calf survival. Late gestation heat stress programs a phenotype with lower milk yield, relative to herd mates born to cooled dams, in the first lactation and subsequent lactations.
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Affiliation(s)
- Geoffrey E Dahl
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 2250 Shealy Drive, POB 110910, FL 32611, USA.
| | - Amy L Skibiel
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 2250 Shealy Drive, POB 110910, FL 32611, USA
| | - Jimena Laporta
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 2250 Shealy Drive, POB 110910, FL 32611, USA
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12
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Raasch M, Fritsche E, Kurtz A, Bauer M, Mosig AS. Microphysiological systems meet hiPSC technology - New tools for disease modeling of liver infections in basic research and drug development. Adv Drug Deliv Rev 2019; 140:51-67. [PMID: 29908880 DOI: 10.1016/j.addr.2018.06.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 06/01/2018] [Accepted: 06/12/2018] [Indexed: 02/08/2023]
Abstract
Complex cell culture models such as microphysiological models (MPS) mimicking human liver functionality in vitro are in the spotlight as alternative to conventional cell culture and animal models. Promising techniques like microfluidic cell culture or micropatterning by 3D bioprinting are gaining increasing importance for the development of MPS to address the needs for more predictivity and cost efficiency. In this context, human induced pluripotent stem cells (hiPSCs) offer new perspectives for the development of advanced liver-on-chip systems by recreating an in vivo like microenvironment that supports the reliable differentiation of hiPSCs to hepatocyte-like cells (HLC). In this review we will summarize current protocols of HLC generation and highlight recently established MPS suitable to resemble physiological hepatocyte function in vitro. In addition, we are discussing potential applications of liver MPS for disease modeling related to systemic or direct liver infections and the use of MPS in testing of new drug candidates.
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13
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Ruoß M, Damm G, Vosough M, Ehret L, Grom-Baumgarten C, Petkov M, Naddalin S, Ladurner R, Seehofer D, Nussler A, Sajadian S. Epigenetic Modifications of the Liver Tumor Cell Line HepG2 Increase Their Drug Metabolic Capacity. Int J Mol Sci 2019; 20:ijms20020347. [PMID: 30654452 PMCID: PMC6358789 DOI: 10.3390/ijms20020347] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/12/2019] [Accepted: 01/14/2019] [Indexed: 01/31/2023] Open
Abstract
Although human liver tumor cells have reduced metabolic functions as compared to primary human hepatocytes (PHH) they are widely used for pre-screening tests of drug metabolism and toxicity. The aim of the present study was to modify liver cancer cell lines in order to improve their drug-metabolizing activities towards PHH. It is well-known that epigenetics is strongly modified in tumor cells and that epigenetic regulators influence the expression and function of Cytochrome P450 (CYP) enzymes through altering crucial transcription factors responsible for drug-metabolizing enzymes. Therefore, we screened the epigenetic status of four different liver cancer cell lines (Huh7, HLE, HepG2 and AKN-1) which were reported to have metabolizing drug activities. Our results showed that HepG2 cells demonstrated the highest similarity compared to PHH. Thus, we modified the epigenetic status of HepG2 cells towards 'normal' liver cells by 5-Azacytidine (5-AZA) and Vitamin C exposure. Then, mRNA expression of Epithelial-mesenchymal transition (EMT) marker SNAIL and CYP enzymes were measured by PCR and determinate specific drug metabolites, associated with CYP enzymes by LC/MS. Our results demonstrated an epigenetic shift in HepG2 cells towards PHH after exposure to 5-AZA and Vitamin C which resulted in a higher expression and activity of specific drug metabolizing CYP enzymes. Finally, we observed that 5-AZA and Vitamin C led to an increased expression of Hepatocyte nuclear factor 4α (HNF4α) and E-Cadherin and a significant down regulation of Snail1 (SNAIL), the key transcriptional repressor of E-Cadherin. Our study shows, that certain phase I genes and their enzyme activities are increased by epigenetic modification in HepG2 cells with a concomitant reduction of EMT marker gene SNAIL. The enhancing of liver specific functions in hepatoma cells using epigenetic modifiers opens new opportunities for the usage of cell lines as a potential liver in vitro model for drug testing and development.
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Affiliation(s)
- Marc Ruoß
- Siegfried Weller Institute, BG Trauma Clinic, Eberhard Karls University Tübingen, 72076 Tübingen, Germany.
| | - Georg Damm
- Department of Hepatobiliary Surgery and Visceral Transplantation, University of Leipzig, 04103 Leipzig, Germany.
| | - Massoud Vosough
- Royan Institute for Stem Cell Biology and Technology, Department of Stem Cells and Developmental Biology, Tehran 16635-148, Iran.
| | - Lisa Ehret
- Siegfried Weller Institute, BG Trauma Clinic, Eberhard Karls University Tübingen, 72076 Tübingen, Germany.
| | - Carl Grom-Baumgarten
- Siegfried Weller Institute, BG Trauma Clinic, Eberhard Karls University Tübingen, 72076 Tübingen, Germany.
| | - Martin Petkov
- Siegfried Weller Institute, BG Trauma Clinic, Eberhard Karls University Tübingen, 72076 Tübingen, Germany.
| | - Silvio Naddalin
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, 72076 Tübingen, Germany.
| | - Ruth Ladurner
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, 72076 Tübingen, Germany.
| | - Daniel Seehofer
- Department of Hepatobiliary Surgery and Visceral Transplantation, University of Leipzig, 04103 Leipzig, Germany.
| | - Andreas Nussler
- Siegfried Weller Institute, BG Trauma Clinic, Eberhard Karls University Tübingen, 72076 Tübingen, Germany.
| | - Sahar Sajadian
- Siegfried Weller Institute, BG Trauma Clinic, Eberhard Karls University Tübingen, 72076 Tübingen, Germany.
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14
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Developmental exposure to DEHP alters hepatic glucose uptake and transcriptional regulation of GLUT2 in rat male offspring. Toxicology 2018; 413:56-64. [PMID: 30597186 DOI: 10.1016/j.tox.2018.12.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/14/2018] [Accepted: 12/27/2018] [Indexed: 12/16/2022]
Abstract
Type-2-diabetes (T2D) is a long term metabolic disorder characterized by high blood glucose and insulin resistance. It has become an alarming issue globally due to tremendous increase in number of new subjects every year. Apart from the classical factors, there are few non-classical factors such as environmental pollutants, endocrine disrupting chemicals (EDCs) which also play a major role in pathogenesis of T2D. Di-(2-ethylhexyl) phthalate (DEHP) is a commonly used plasticizer which is an endocrine disrupting chemical. It is used in the plastic industry to give flexibility and durability. Its widespread use resulted in constant presence in the environment and human are under high risk of exposure to this compound. There are literature available stating that DEHP has an impact on glucose homeostasis. Glucose transporter 2 (GLUT2) is a principal transporter of glucose in liver and it is a bi-directional transporter. We investigated whether DEHP exposure during gestation and lactation alters transcriptional regulation of GLUT2 and epigenetics changes in the rat F1 male offspring at adulthood. Pregnant rats were divided into three groups and administered with DEHP (10 and 100 mg /kg /day) or olive oil from gestational day (GD) 9- to postnatal day (PND) 21 through oral gavage. DEHP treated rats showed decreased glucose uptake and oxidation, decreased mRNA levels of insulin receptor (IR), GLUT2 and reduced GLUT2 protein in cytosol but unaltered level in plasma membrane. There are three main transcription factors (SREBP1c, HNF3β and HNF1α) involved in the regulation of GLUT2 gene and all these proteins were reduced in DEHP exposed groups. A weak interaction of the transcription factors (SREBP1c & HNF1α) with GLUT2 gene promoter was observed in DEHP-treated groups. Hyper- methylation of IR and GLUT2 gene promoter was observed in both the DEHP-exposed groups compared to control. The present study reveals that DEHP exposure alters transcriptional regulation of GLUT2 and imposes epigenetic alteration in IR and GLUT2 gene promoters which plays a significant role in the development of metabolic abnormality in F1 male offspring at adulthood.
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15
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Skibiel AL, Peñagaricano F, Amorín R, Ahmed BM, Dahl GE, Laporta J. In Utero Heat Stress Alters the Offspring Epigenome. Sci Rep 2018; 8:14609. [PMID: 30279561 PMCID: PMC6168509 DOI: 10.1038/s41598-018-32975-1] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/19/2018] [Indexed: 12/20/2022] Open
Abstract
Exposure to intrauterine heat stress during late gestation affects offspring performance into adulthood. However, underlying mechanistic links between thermal insult in fetal life and postnatal outcomes are not completely understood. We examined morphology, DNA methylation, and gene expression of liver and mammary gland for bull calves and heifers that were gestated under maternal conditions of heat stress or cooling (i.e. in utero heat stressed vs. in utero cooled calves). Mammary tissue was harvested from dairy heifers during their first lactation and liver from bull calves at birth. The liver of in utero heat stressed bull calves contained more cells and the mammary glands of in utero heat stressed heifers were comprised of smaller alveoli. We identified more than 1,500 CpG sites differently methylated between maternal treatment groups. These CpGs were associated with approximately 400 genes, which play a role in processes, such as development, innate immune defense, cell signaling, and transcription and translation. We also identified over 100 differentially expressed genes in the mammary gland with similar functions. Interestingly, fifty differentially methylated genes were shared by both bull calf liver and heifer mammary gland. Intrauterine heat stress alters the methylation profile of liver and mammary DNA and programs their morphology in postnatal life, which may contribute to the poorer performance of in utero heat stressed calves.
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Affiliation(s)
- A L Skibiel
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA
| | - F Peñagaricano
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA.,University of Florida Genetics Institute, University of Florida, Gainesville, FL, USA
| | - R Amorín
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA
| | - B M Ahmed
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA
| | - G E Dahl
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA.
| | - J Laporta
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA.
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16
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Pajares MA, Pérez-Sala D. Mammalian Sulfur Amino Acid Metabolism: A Nexus Between Redox Regulation, Nutrition, Epigenetics, and Detoxification. Antioxid Redox Signal 2018; 29:408-452. [PMID: 29186975 DOI: 10.1089/ars.2017.7237] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE Transsulfuration allows conversion of methionine into cysteine using homocysteine (Hcy) as an intermediate. This pathway produces S-adenosylmethionine (AdoMet), a key metabolite for cell function, and provides 50% of the cysteine needed for hepatic glutathione synthesis. The route requires the intake of essential nutrients (e.g., methionine and vitamins) and is regulated by their availability. Transsulfuration presents multiple interconnections with epigenetics, adenosine triphosphate (ATP), and glutathione synthesis, polyol and pentose phosphate pathways, and detoxification that rely mostly in the exchange of substrates or products. Major hepatic diseases, rare diseases, and sensorineural disorders, among others that concur with oxidative stress, present impaired transsulfuration. Recent Advances: In contrast to the classical view, a nuclear branch of the pathway, potentiated under oxidative stress, is emerging. Several transsulfuration proteins regulate gene expression, suggesting moonlighting activities. In addition, abnormalities in Hcy metabolism link nutrition and hearing loss. CRITICAL ISSUES Knowledge about the crossregulation between pathways is mostly limited to the hepatic availability/removal of substrates and inhibitors. However, advances regarding protein-protein interactions involving oncogenes, identification of several post-translational modifications (PTMs), and putative moonlighting activities expand the potential impact of transsulfuration beyond methylations and Hcy. FUTURE DIRECTIONS Increasing the knowledge on transsulfuration outside the liver, understanding the protein-protein interaction networks involving these enzymes, the functional role of their PTMs, or the mechanisms controlling their nucleocytoplasmic shuttling may provide further insights into the pathophysiological implications of this pathway, allowing design of new therapeutic interventions. Antioxid. Redox Signal. 29, 408-452.
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Affiliation(s)
- María A Pajares
- 1 Department of Chemical and Physical Biology, Centro de Investigaciones Biológicas (CSIC) , Madrid, Spain .,2 Molecular Hepatology Group, Instituto de Investigación Sanitaria La Paz (IdiPAZ) , Madrid, Spain
| | - Dolores Pérez-Sala
- 1 Department of Chemical and Physical Biology, Centro de Investigaciones Biológicas (CSIC) , Madrid, Spain
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17
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Han S, Tan C, Ding J, Wang J, Ma'ayan A, Gouon-Evans V. Endothelial cells instruct liver specification of embryonic stem cell-derived endoderm through endothelial VEGFR2 signaling and endoderm epigenetic modifications. Stem Cell Res 2018; 30:163-170. [PMID: 29936335 DOI: 10.1016/j.scr.2018.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/05/2018] [Accepted: 06/07/2018] [Indexed: 12/19/2022] Open
Abstract
Liver organogenesis requires complex cell-cell interactions between hepatic endoderm cells and adjacent cell niches. Endothelial cells are key players for endoderm hepatic fate decision. We previously demonstrated that the endothelial cell niche promotes hepatic specification of mouse embryonic stem cell(ESC)-derived endoderm through dual repression of Wnt and Notch pathways in endoderm cells. In the present study, we dissected further the mechanisms by which endothelial cells trigger endoderm hepatic specification. Using our previously established in vitro mouse ESC system mimicking the early hepatic specification process, endoderm cells were purified and co-cultured with endothelial cells to induce hepatic specification. The comparison of transcriptome profiles between hepatic endoderm cells isolated from co-cultures and endoderm cells cultured alone revealed that VEGF signaling instructs hepatic specification of endoderm cells through endothelial VEGFR2 activation. Additionally, epigenetic mark inhibition assays upon co-cultures uncovered that histone acetylation and DNA methylation promote hepatic specification while histone methylation inhibits it. This study provides an efficient 2D platform modelling the endothelial cell niche crosstalk with endoderm, and reveals mechanisms by which endothelial cells promote hepatic specification of mouse ESC-derived endoderm cells through endothelial VEGFR2 activation and endoderm epigenetic modifications.
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Affiliation(s)
- Songyan Han
- Department of Cell, Developmental and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Christopher Tan
- Department of Pharmacological Science, Mount Sinai Center for Bioinformatics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Junjun Ding
- Department of Cell, Developmental and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Jianlong Wang
- Department of Cell, Developmental and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Avi Ma'ayan
- Department of Pharmacological Science, Mount Sinai Center for Bioinformatics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Valerie Gouon-Evans
- Department of Cell, Developmental and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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18
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Chaker D, Mouawad C, Azar A, Quilliot D, Achkar I, Fajloun Z, Makdissy N. Inhibition of the RhoGTPase Cdc42 by ML141 enhances hepatocyte differentiation from human adipose-derived mesenchymal stem cells via the Wnt5a/PI3K/miR-122 pathway: impact of the age of the donor. Stem Cell Res Ther 2018; 9:167. [PMID: 29921325 PMCID: PMC6009972 DOI: 10.1186/s13287-018-0910-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 05/08/2018] [Accepted: 05/20/2018] [Indexed: 12/11/2022] Open
Abstract
Background Human adipose-derived mesenchymal stem cells (hADSCs) are promising cells that may promote hepatocyte differentiation (Hep-Dif) and improve liver function, but the involvement of Cdc42, a key small RhoGTPase which plays a crucial role in aging, is still not well established. We hypothesized that the inhibition of Cdc42 may rescue the hepatogenic potential of hADSCs derived from aged donors. Methods hADSCs isolated from 61 women of different ages were cultured for evaluation of the proliferation of cells, adherence, apoptosis, immunomodulation, immunophenotyping, multipotency, gene expression, and cell function during Hep-Dif. Inhibition of Cdc42 by ML141 was realized during two phases: initiation (days –2 to 14 (D–2/14)) from undifferentiated to hepatoblast-like cells, or maturation (days 14 to 28 (D14/28)) from undifferentiated to hepatocyte-like cells. Mechanistic insights of the Wnt(s)/MAPK/PI3K/miR-122 pathways were studied. Results Cdc42 activity in undifferentiated hADSCs showed an age-dependent significant increase in Cdc42-GTP correlated to a decrease in Cdc42GAP; the low potentials of cell proliferation, doubling, adherence, and immunomodulatory ability (proinflammatory over anti-inflammatory) contrary to the apoptotic index of the aged group were significantly reversed by ML141. Aged donor cells showed a decreased potential for Hep-Dif which was rescued by ML141 treatment, giving rise to mature and functional hepatocyte-like cells as assessed by hepatic gene expression, cytochrome activity, urea and albumin production, low-density lipoprotein (LDL) uptake, and glycogen storage. ML141-induced Hep-Dif showed an improvement in mesenchymal-epithelial transition, a switch from Wtn-3a/β-catenin to Wnt5a signaling, involvement of PI3K/PKB but not the MAPK (ERK/JNK/p38) pathway, induction of miR-122 expression, reinforcing the exosomes release and the production of albumin, and epigenetic changes. Inhibition of PI3K and miR-122 abolished completely the effects of ML141 indicating that inhibition of Cdc42 promotes the Hep-Dif through a Wnt5a/PI3K/miR-122/HNF4α/albumin/E-cadherin-positive action. The ML141(D–2/14) protocol had more pronounced effects when compared with ML141(D14/28); inhibition of DNA methylation in combination with ML141(D–2/14) showed more efficacy in rescuing the Hep-Dif of aged hADSCs. In addition to Hep-Dif, the multipotency of aged hADSC-treated ML141 was observed by rescuing the adipocyte and neural differentiation by inducing PPARγ/FABP4 and NeuN/O4 but inhibiting Pref-1 and GFAP, respectively. Conclusion ML141 has the potential to reverse the age-related aberrations in aged stem cells and promotes their hepatogenic differentiation. Selective inhibition of Cdc42 could be a potential target of drug therapy for aging and may give new insights on the improvement of Hep-Dif. Electronic supplementary material The online version of this article (10.1186/s13287-018-0910-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Diana Chaker
- Lebanese University, Doctoral School for Sciences and Technology, Laboratory of Applied Biotechnology, Azm Center for Research in Biotechnology and its Applications, Tripoli, Lebanon.,Reviva Regenerative Medicine Center, Human Genetic Center, Middle East Institute of Health Hospital, Bsalim, Lebanon.,Paris Saclay University, Doctoral School, Therapeutical Innovation, Inserm UMR935, Villejuif, France
| | | | - Albert Azar
- Reviva Regenerative Medicine Center, Human Genetic Center, Middle East Institute of Health Hospital, Bsalim, Lebanon
| | - Didier Quilliot
- Diabetologia-Endocrinology & Nutrition, CHRU Nancy, INSERM 954, University Henri Poincaré de Lorraine, Faculty of Medicine, Nancy, France
| | | | - Ziad Fajloun
- Lebanese University, Doctoral School for Sciences and Technology, Laboratory of Applied Biotechnology, Azm Center for Research in Biotechnology and its Applications, Tripoli, Lebanon.,Lebanese University, Faculty of Sciences III, Department of Biology, Kobbe, Lebanon
| | - Nehman Makdissy
- Lebanese University, Doctoral School for Sciences and Technology, Laboratory of Applied Biotechnology, Azm Center for Research in Biotechnology and its Applications, Tripoli, Lebanon. .,Lebanese University, Faculty of Sciences III, Department of Biology, Kobbe, Lebanon.
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19
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Gailhouste L, Liew LC, Yasukawa K, Hatada I, Tanaka Y, Nakagama H, Ochiya T. Differentiation Therapy by Epigenetic Reconditioning Exerts Antitumor Effects on Liver Cancer Cells. Mol Ther 2018; 26:1840-1854. [PMID: 29759938 PMCID: PMC6035736 DOI: 10.1016/j.ymthe.2018.04.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/17/2018] [Accepted: 04/20/2018] [Indexed: 02/07/2023] Open
Abstract
Primary liver tumors are mainly represented by hepatocellular carcinoma (HCC), one of the most aggressive and resistant forms of cancer. Liver tumorigenesis is characterized by an accumulation of epigenetic abnormalities, leading to gene extinction and loss of hepatocyte differentiation. The aim of this work was to investigate the feasibility of converting liver cancer cells toward a less aggressive and differentiated phenotype using a process called epigenetic reconditioning. Here, we showed that an epigenetic regimen with non-cytotoxic doses of the demethylating compound 5-azacytidine (5-AZA) promoted an anti-cancer response by inhibiting HCC cell tumorigenicity. Furthermore, epigenetic reconditioning improved sorafenib response. Remarkably, epigenetic treatment was associated with a significant restoration of differentiation, as attested by the increased expression of characteristic hepatocyte markers in reconditioned cells. In particular, we showed that reexpression of these epigenetically silenced liver genes following 5-AZA treatment or after knockdown of DNA methyltransferase 1 (DNMT1) was the result of regional CpG demethylation. Lastly, we confirmed the efficacy of HCC differentiation therapy by epigenetic reconditioning using an in vivo tumor growth model. In summary, this work demonstrates that epigenetic reconditioning using the demethylating compound 5-AZA shows therapeutic significance for liver cancer and is potentially attractive for the treatment of solid tumors.
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Affiliation(s)
- Luc Gailhouste
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan.
| | - Lee Chuen Liew
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan; Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Ken Yasukawa
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - Izuho Hatada
- Laboratory of Genome Science, Biosignal Genome Resource Center, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Yasuhito Tanaka
- Department of Virology and Liver Unit, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Hitoshi Nakagama
- Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; National Cancer Center, Tokyo, Japan
| | - Takahiro Ochiya
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan.
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20
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Chen C, Soto-Gutierrez A, Baptista PM, Spee B. Biotechnology Challenges to In Vitro Maturation of Hepatic Stem Cells. Gastroenterology 2018; 154:1258-1272. [PMID: 29428334 PMCID: PMC6237283 DOI: 10.1053/j.gastro.2018.01.066] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 01/05/2018] [Accepted: 01/10/2018] [Indexed: 12/16/2022]
Abstract
The incidence of liver disease is increasing globally. The only curative therapy for severe end-stage liver disease, liver transplantation, is limited by the shortage of organ donors. In vitro models of liver physiology have been developed and new technologies and approaches are progressing rapidly. Stem cells might be used as a source of liver tissue for development of models, therapies, and tissue-engineering applications. However, we have been unable to generate and maintain stable and mature adult liver cells ex vivo. We review factors that promote hepatocyte differentiation and maturation, including growth factors, transcription factors, microRNAs, small molecules, and the microenvironment. We discuss how the hepatic circulation, microbiome, and nutrition affect liver function, and the criteria for considering cells derived from stem cells to be fully mature hepatocytes. We explain the challenges to cell transplantation and consider future technologies for use in hepatic stem cell maturation, including 3-dimensional biofabrication and genome modification.
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Affiliation(s)
- Chen Chen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands; The Royal Netherlands Academy of Arts and Sciences, Hubrecht Institute and University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Pedro M Baptista
- Instituto de Investigación Sanitaria de Aragón, Zaragoza, Spain; Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas, Madrid, Spain; Fundación Agencia Aragonesa para la Investigación y el Desarrollo, Zaragoza, Spain; Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz, Madrid, Spain; Department of Biomedical and Aerospace Engineering, Universidad Carlos III de Madrid, Madrid, Spain
| | - Bart Spee
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
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21
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Safety and Tolerance of Donor-Derived Mesenchymal Stem Cells in Pediatric Living-Donor Liver Transplantation: The MYSTEP1 Study. Stem Cells Int 2017; 2017:2352954. [PMID: 28740511 PMCID: PMC5504958 DOI: 10.1155/2017/2352954] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 05/08/2017] [Indexed: 12/14/2022] Open
Abstract
Background Calcineurin inhibitors (CNI) have significantly improved patient and graft survival in pediatric liver transplantation (pLT). However, CNI toxicity leads to significant morbidity. Moreover, CNIs cannot prevent long-term allograft injury. Mesenchymal stem (stromal) cells (MSC) have potent immunomodulatory properties, which may promote allograft tolerance and ameliorate toxicity of high-dose CNI. The MYSTEP1 trial aims to investigate safety and feasibility of donor-derived MSCs in pLT. Methods/Design 7 to 10 children undergoing living-donor pLT will be included in this open-label, prospective pilot trial. A dose of 1 × 106 MSCs/kg body weight will be given at two time points: first by intraportal infusion intraoperatively and second by intravenous infusion on postoperative day 2. In addition, participants will receive standard immunosuppressive treatment. Our primary objective is to assess the safety of intraportal and intravenous MSC infusion in pLT recipients. Our secondary objective is to evaluate efficacy of MSC treatment as measured by the individual need for immunosuppression and the incidence of biopsy-proven acute rejection. We will perform detailed immune monitoring to investigate immunomodulatory effects. Discussion Our study will provide information on the safety of donor-derived MSCs in pediatric living-donor liver transplantation and their effect on immunomodulation and graft survival.
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22
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Lee CW, Huang WC, Huang HD, Huang YH, Ho JH, Yang MH, Yang VW, Lee OK. DNA Methyltransferases Modulate Hepatogenic Lineage Plasticity of Mesenchymal Stromal Cells. Stem Cell Reports 2017; 9:247-263. [PMID: 28602611 PMCID: PMC5511371 DOI: 10.1016/j.stemcr.2017.05.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 05/04/2017] [Accepted: 05/05/2017] [Indexed: 12/20/2022] Open
Abstract
The irreversibility of developmental processes in mammalian cells has been challenged by rising evidence that de-differentiation of hepatocytes occurs in adult liver. However, whether reversibility exists in mesenchymal stromal cell (MSC)-derived hepatocytes (dHeps) remains elusive. In this study, we find that hepatogenic differentiation (HD) of MSCs is a reversible process and is modulated by DNA methyltransferases (DNMTs). DNMTs are regulated by transforming growth factor β1 (TGFβ1), which in turn controls hepatogenic differentiation and de-differentiation. In addition, a stepwise reduction in TGFβ1 concentrations in culture media increases DNMT1 and decreases DNMT3 in primary hepatocytes (Heps) and confers Heps with multi-differentiation potentials similarly to MSCs. Hepatic lineage reversibility of MSCs and lineage conversion of Heps are regulated by DNMTs in response to TGFβ1. This previously unrecognized TGFβ1-DNMTs-MSC-HD axis may further increase the understanding the normal and pathological processes in the liver, as well as functions of MSCs after transplantation to treat liver diseases.
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Affiliation(s)
- Chien-Wei Lee
- Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei 11221, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Wei-Chih Huang
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, HsinChu 30010, Taiwan
| | - Hsien-Da Huang
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, HsinChu 30010, Taiwan; Department of Biological Science and Technology, National Chiao Tung University, HsinChu 30010, Taiwan; Center for Bioinformatics Research, National Chiao Tung University, HsinChu 30010, Taiwan; Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yi-Hsiang Huang
- Division of Gastroenterology, Department of Medicine, Taipei Veterans General Hospital, Taipei 11221, Taiwan
| | - Jennifer H Ho
- Center for Stem Cell Research, Taipei Medical University-Wan Fang Hospital, Taipei 11031, Taiwan
| | - Muh-Hwa Yang
- Institute of Biotechnology in Medicine, National Yang-Ming University, Taipei 11221, Taiwan; Genome Research Center, National Yang-Ming University, Taipei 11221, Taiwan; Immunity and Inflammation Research Center, National Yang-Ming University, Taipei 11221, Taiwan; Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan; Genomics Research Center, Academia Sinica, Taipei 11529, Taiwan
| | - Vincent W Yang
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794, USA
| | - Oscar K Lee
- Taipei City Hospital, Taipei 10341, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei 11221, Taiwan; Stem Cell Research Center, National Yang-Ming University, Taipei 11221, Taiwan; Department of Medical Research, Taipei Veterans General Hospital, Taipei 11221, Taiwan.
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23
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Kaji K, Factor VM, Andersen JB, Durkin ME, Tomokuni A, Marquardt JU, Matter MS, Hoang T, Conner EA, Thorgeirsson SS. DNMT1 is a required genomic regulator for murine liver histogenesis and regeneration. Hepatology 2016; 64:582-98. [PMID: 26999257 PMCID: PMC5841553 DOI: 10.1002/hep.28563] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 02/18/2016] [Accepted: 03/15/2016] [Indexed: 12/11/2022]
Abstract
UNLABELLED DNA methyltransferase 1 (DNMT1) is an essential regulator maintaining both epigenetic reprogramming during DNA replication and genome stability. We investigated the role of DNMT1 in the regulation of postnatal liver histogenesis under homeostasis and stress conditions. We generated Dnmt1 conditional knockout mice (Dnmt1(Δalb) ) by crossing Dnmt1(fl/fl) with albumin-cyclization recombination transgenic mice. Serum, liver tissues, and primary hepatocytes were collected from 1-week-old to 20-week old mice. The Dnmt1(Δalb) phenotype was assessed by histology, confocal and electron microscopy, biochemistry, as well as transcriptome and methylation profiling. Regenerative growth was induced by partial hepatectomy and exposure to carbon tetrachloride. The impact of Dnmt1 knockdown was also analyzed in hepatic progenitor cell lines; proliferation, apoptosis, DNA damage, and sphere formation were assessed. Dnmt1 loss in postnatal hepatocytes caused global hypomethylation, enhanced DNA damage response, and initiated a senescence state causing a progressive inability to maintain tissue homeostasis and proliferate in response to injury. The liver regenerated through activation and repopulation from progenitors due to lineage-dependent differences in albumin-cyclization recombination expression, providing a basis for selection of less mature and therefore less damaged hepatic progenitor cell progeny. Consistently, efficient knockdown of Dnmt1 in cultured hepatic progenitor cells caused severe DNA damage, cell cycle arrest, senescence, and cell death. Mx1-cyclization recombination-driven deletion of Dnmt1 in adult quiescent hepatocytes did not affect liver homeostasis. CONCLUSION These results establish the indispensable role of DNMT1-mediated epigenetic regulation in postnatal liver growth and regeneration; Dnmt1(Δalb) mice provide a unique experimental model to study the role of senescence and the contribution of progenitor cells to physiological and regenerative liver growth. (Hepatology 2016;64:582-598).
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Affiliation(s)
- Kosuke Kaji
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Valentina M. Factor
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Jesper B. Andersen
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA,Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen 2200, Denmark
| | - Marian E. Durkin
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Akira Tomokuni
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Jens U. Marquardt
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA,Department of Medicine I, Johannes Gutenberg University of Mainz, 55131 Mainz, Germany
| | - Matthias S. Matter
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Tanya Hoang
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Elizabeth A. Conner
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
| | - Snorri S. Thorgeirsson
- Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, 20892, USA
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24
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Zhang J, Zhu X, Li Y, Zhu L, Li S, Zheng G, Ren Q, Xiao Y, Feng F. Correlation of CpG Island Methylation of the Cytochrome P450 2E1/2D6 Genes with Liver Injury Induced by Anti-Tuberculosis Drugs: A Nested Case-Control Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13080776. [PMID: 27490558 PMCID: PMC4997462 DOI: 10.3390/ijerph13080776] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Revised: 07/18/2016] [Accepted: 07/27/2016] [Indexed: 12/21/2022]
Abstract
This study investigated the role of CpG island methylation of the CYP2E1 and CYP2D6 genes in liver injury induced by anti-TB drugs from an epigenetic perspective in a Chinese cohort. A 1:1 matched nested case-control study design was applied. Pulmonary tuberculosis (TB) patients, who underwent standard anti-TB therapy and developed liver injury were defined as cases, while those who did not develop liver injury were defined as control. The two groups were matched in terms of sex, treatment regimen, and age. In 114 pairs of cases, CpG island methylation levels of the CYP2E1 and CYP2D6 genes in plasma cell-free DNA were found to be significantly correlated with the occurrence of anti-TB drug-induced liver injury (ADLI), with odds ratio (OR) values of 2.429 and 3.500, respectively (p < 0.01). Moreover, through multivariate logistic regression analysis, CpG island methylation of the CYP2E1 and CYP2D6 genes in plasma cell-free DNA were found to be significantly correlated with the occurrence of ADLI, with adjusted OR values of 4.390 (95% confidence interval (CI): 1.982–9.724) and 9.193 (95% CI: 3.624–25.888), respectively (p < 0.001). These results suggest that aberrantly elevated methylation of CpG islands of the CYP2E1 and CYP2D6 genes in plasma cell-free DNA may increase the risk of ADLI in Chinese TB patients.
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Affiliation(s)
- Jinling Zhang
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Xuebin Zhu
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Yuhong Li
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Lingyan Zhu
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Shiming Li
- Department of Clinical Laboratories, Tangshan Tuberculosis Hospital, Tangshan 063000, China.
| | - Guoying Zheng
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Qi Ren
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Yonghong Xiao
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
| | - Fumin Feng
- Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, North China University of Science and Technology, No.57 Jianshe Road, Tangshan 063000, China.
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25
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Man HSJ, Yan MS, Lee JJ, Marsden PA. Epigenetic determinants of cardiovascular gene expression: vascular endothelium. Epigenomics 2016; 8:959-79. [PMID: 27381277 DOI: 10.2217/epi-2016-0012] [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] [Indexed: 01/08/2023] Open
Abstract
The modern landscape of gene regulation involves interacting factors that ultimately lead to gene activation or repression. Epigenetic mechanisms provide a perspective of cellular phenotype as dynamically regulated and responsive to input. This perspective is supported by the generation of induced pluripotent stem cells from fully differentiated cell types. In vascular endothelial cells, evidence suggests that epigenetic mechanisms play a major role in the expression of endothelial cell-specific genes such as the endothelial nitric oxide synthase (NOS3/eNOS). These mechanisms are also important for eNOS expression in response to environmental stimuli such as hypoxia and shear stress. A newer paradigm in epigenetics, long noncoding RNAs offer a link between genetic variation, epigenetic regulation and disease. While the understanding of epigenetic mechanisms is early in its course, it is becoming clear that approaches to understanding the interaction of these factors and their inputs will be necessary to improve outcomes in cardiovascular disease.
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Affiliation(s)
- Hon-Sum Jeffrey Man
- Department of Medicine, Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.,Departments of Respirology & Critical Care, University Health Network & Mt Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Matthew S Yan
- Department of Medicine, Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - John Jy Lee
- Department of Medicine, Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Philip A Marsden
- Department of Medicine, Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.,Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Nephrology, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
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Effect of Chromatin-Remodeling Agents in Hepatic Differentiation of Rat Bone Marrow-Derived Mesenchymal Stem Cells In Vitro and In Vivo. Stem Cells Int 2016; 2016:3038764. [PMID: 27242905 PMCID: PMC4876003 DOI: 10.1155/2016/3038764] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/13/2016] [Accepted: 03/29/2016] [Indexed: 02/08/2023] Open
Abstract
Epigenetic events, including covalent histone modifications and DNA methylation, play fundamental roles in the determination of lineage-specific gene expression and cell fates. The aim of this study was to determine whether the DNA methyltransferase inhibitor (DNMTi) 5-aza-2′-deoxycytidine (5-aza-dC) and the histone deacetylase inhibitor (HDACi) trichostatin A (TSA) promote the hepatic differentiation of rat bone marrow-derived mesenchymal stem cells (rBM-MSCs) and their therapeutic effect on liver damage. 1 μM TSA and 20 μM 5-aza-dC were added to standard hepatogenic medium especially at differentiation and maturation steps and their potential function on hepatic differentiation in vitro and in vivo was determined. Exposure of rBM-MSCs to 1 μM TSA at both the differentiation and maturation steps considerably improved hepatic differentiation. TSA enhanced the development of the hepatocyte shape, promoted the chronological expression of hepatocyte-specific markers, and improved hepatic functions. In contrast, treatment of rBM-MSCs with 20 μM 5-aza-dC alone or in combination with TSA was ineffective in improving hepatic differentiation in vitro. TSA and/or 5-aza-dC derived hepatocytes-like cells failed to improve the therapeutic potential in liver damage. We conclude that HDACis enhance hepatic differentiation in a time-dependent manner, while DNMTis do not induce the hepatic differentiation of rBM-MSCs in vitro. Their in vivo function needs further investigation.
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27
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Delgado-Coello B, Mas-Oliva J. Relevance of the plasma membrane calcium-ATPase in the homeostasis of calcium in the fetal liver. Organogenesis 2015; 10:333-9. [PMID: 25836032 PMCID: PMC4594366 DOI: 10.1080/15476278.2015.1011918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
During the early stages of development, the embryo depends on the placenta as provider of oxygen and calcium, among other essential compounds. Although fetal liver accomplishes a well-known haematopoietic function, its contribution to calcium homeostasis upon development is poorly understood. The homeostasis of cell calcium contributes to diverse signaling pathways across developmental stages of most tissues and the calcium-ATPase located at the plasma membrane (PMCA) helps pumping excess calcium into the extracellular space. To date, the understanding of the equilibrium shift between PMCA isoforms during liver development is still missing. This review focuses on the characterization of the hepatic PMCA along the early stages of development, followed by a description of modern approaches to study calcium homeostasis involving several types of pluripotent cells. The application of interdisciplinary techniques to improve our understanding of liver development and the role calcium homeostasis plays in the definition of pathogenesis is also discussed.
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Affiliation(s)
- Blanca Delgado-Coello
- a Departamento de Bioquímica y Biología Estructural ; Instituto de Fisiología Celular ; Universidad Nacional Autónoma de México ; México D.F. , México
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28
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Kanda T, Sasaki R, Nakamoto S, Haga Y, Nakamura M, Shirasawa H, Okamoto H, Yokosuka O. The sirtuin inhibitor sirtinol inhibits hepatitis A virus (HAV) replication by inhibiting HAV internal ribosomal entry site activity. Biochem Biophys Res Commun 2015; 466:567-71. [PMID: 26388050 DOI: 10.1016/j.bbrc.2015.09.083] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 09/14/2015] [Indexed: 12/14/2022]
Abstract
Epigenetics plays a role in the regulation of gene expression. Epigenetic changes control gene expression at the transcriptional level. Our previous study suggested that the La protein, which is mainly localized in the nucleus, was associated with hepatitis A virus (HAV) internal ribosomal entry site (IRES)-mediated translation and HAV replication. The aim of this study was to investigate whether epigenetic compounds have effects on HAV IRES-mediated translation and HAV replication. Sirtinol, a sirtuin inhibitor, inhibited HAV IRES-mediated translation in COS7-HAV-IRES cells. Treatment with 10 μM sirtinol resulted in a significant reduction in the intracellular RNA levels of HAV HA11-1299 genotype IIIA in Huh7 cells. Epigenetic treatment with a sirtuin inhibitor may represent a new treatment option for HAV infection. In conclusion, epigenetic control was involved in HAV IRES-dependent translation and HAV replication. Special attention should also be paid to underlying viral diseases in the clinical use of epigenetic treatments for malignancies.
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Affiliation(s)
- Tatsuo Kanda
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
| | - Reina Sasaki
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Shingo Nakamoto
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan; Department of Molecular Virology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Yuki Haga
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Masato Nakamura
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Hiroshi Shirasawa
- Department of Molecular Virology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
| | - Hiroaki Okamoto
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Japan
| | - Osamu Yokosuka
- Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
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Involvement of cytochrome P450 1A1 and glutathione S-transferase P1 polymorphisms and promoter hypermethylation in the progression of anti-tuberculosis drug-induced liver injury: a case-control study. PLoS One 2015; 10:e0119481. [PMID: 25798582 PMCID: PMC4370371 DOI: 10.1371/journal.pone.0119481] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 01/14/2015] [Indexed: 12/25/2022] Open
Abstract
Background Anti-tuberculosis (anti-TB) drug-induced liver injury (ADLI) is one of the most common adverse effects associated with TB treatment. Cytochrome P450 (CYP) 1A1 and glutathione S-transferase (GST) P1 are important phase I/II metabolizing enzymes involved in drug metabolism and detoxification. Genetic polymorphism and CpG island methylation have been reported as factors influencing the expression of CYP1A1 and GSTP1. Objective This study aimed to determine the potential relationships of CYP1A1 and GSTP1 polymorphisms and CpG island methylation with ADLI risk. Design This was a population-based one-to-one matched case–control study. Setting The subjects were patients with TB receiving treatment in China from December 2010 to June 2013. Patients In total, 127 patients with TB and ADLI (case group) and 127 patients with TB but without liver injury (control group) were included in this study. Subjects were matched in terms of sex, age, and therapeutic regimen. Methods The general condition of each patient was assessed using questionnaires. The CYP1A1 MspI and GSTP1 Ile105Val polymorphisms as well as methylation status were detected by polymerase chain reaction (PCR)–restriction fragment length polymorphism and the methylation-specific PCR method. Results We found no significant difference in GSTP1 and CYP1A1 genotypes between the two groups, probably because the sample size was not large enough; however, patients with ADLI had significantly higher GSTP1 and CYP1A1 promoter methylation rates than control subjects [odds ratio (OR) = 2.467 and 2.000, respectively]. After adjusting for drinking, which significantly differed between the groups as per univariate analysis, we found that hypermethylation of GSTP1 and CYP1A1 promoters was associated with ADLI (OR = 2.645 and 2.090, respectively). Conclusion Hypermethylation of CpG islands of GSTP1 and CYP1A1 promoters may thus play important roles in the development of ADLI and provide evidence of being used as novel markers for ADLI risk prediction.
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Xu H, Bionaz M, Sloboda DM, Ehrlich L, Li S, Newnham JP, Dudenhausen JW, Henrich W, Plagemann A, Challis JR, Braun T. The dilution effect and the importance of selecting the right internal control genes for RT-qPCR: a paradigmatic approach in fetal sheep. BMC Res Notes 2015; 8:58. [PMID: 25881111 PMCID: PMC4352295 DOI: 10.1186/s13104-015-0973-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 12/31/2014] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND The key to understanding changes in gene expression levels using reverse transcription real-time quantitative polymerase chain reaction (RT-qPCR) relies on the ability to rationalize the technique using internal control genes (ICGs). However, the use of ICGs has become increasingly problematic given that any genes, including housekeeping genes, thought to be stable across different tissue types, ages and treatment protocols, can be regulated at transcriptomic level. Our interest in prenatal glucocorticoid (GC) effects on fetal growth has resulted in our investigation of suitable ICGs relevant in this model. The usefulness of RNA18S, ACTB, HPRT1, RPLP0, PPIA and TUBB as ICGs was analyzed according to effects of early dexamethasone (DEX) treatment, gender, and gestational age by two approaches: (1) the classical approach where raw (i.e., not normalized) RT-qPCR data of tested ICGs were statistically analyzed and the best ICG selected based on absence of any significant effect; (2) used of published algorithms. For the latter the geNorm Visual Basic application was mainly used, but data were also analyzed by Normfinder and Bestkeeper. In order to account for confounding effects on the geNorm analysis due to co-regulation among ICGs tested, network analysis was performed using Ingenuity Pathway Analysis software. The expression of RNA18S, the most abundant transcript, and correlation of ICGs with RNA18S, total RNA, and liver-specific genes were also performed to assess potential dilution effect of raw RT-qPCR data. The effect of the two approaches used to select the best ICG(s) was compared by normalization of NR3C1 (glucocorticoid receptor) mRNA expression, as an example for a target gene. RESULTS Raw RT-qPCR data of all the tested ICGs was significantly reduced across gestation. TUBB was the only ICG that was affected by DEX treatment. Using approach (1) all tested ICGs would have been rejected because they would initially appear as not reliable for normalization. However, geNorm analysis (approach 2) of the ICGs indicated that the geometrical mean of PPIA, HPRT1, RNA18S and RPLPO can be considered a reliable approach for normalization of target genes in both control and DEX treated groups. Different subset of ICGs were tested for normalization of NR3C1 expression and, despite the overall pattern of the mean was not extremely different, the statistical analysis uncovered a significant influence of the use of different normalization approaches on the expression of the target gene. We observed a decrease of total RNA through gestation, a lower decrease in raw RT-qPCR data of the two rRNA measured compared to ICGs, and a positive correlation between raw RT-qPCR data of ICGs and total RNA. Based on the same amount of total RNA to performed RT-qPCR analysis, those data indicated that other mRNA might have had a large increase in expression and, as consequence, had artificially diluted the stably expressed genes, such as ICGs. This point was demonstrated by a significant negative correlation of raw RT-qPCR data between ICGs and liver-specific genes. CONCLUSION The study confirmed the necessity of assessing multiple ICGs using algorithms in order to obtain a reliable normalization of RT-qPCR data. Our data indicated that the use of the geometrical mean of PPIA, HPRT1, RNA18S and RPLPO can provide a reliable normalization for the proposed study. Furthermore, the dilution effect observed support the unreliability of the classical approach to test ICGs. Finally, the observed change in the composition of RNA species through time reveals the limitation of the use of ICGs to normalize RT-qPCR data, especially if absolute quantification is required.
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Affiliation(s)
- Huaisheng Xu
- Departments of Obstetrics and Division of Experimental Obstetrics, Charité - University Berlin, Augustenburger Platz 1, Berlin, Germany. .,Departments of Obstetrics and Gynecology, Linyi People's Hospital, Shandong, China.
| | - Massimo Bionaz
- Animal and Rangeland Sciences, Oregon State University, Corvallis, USA.
| | - Deborah M Sloboda
- Departments of Biochemistry and Biomedical Sciences, Obstetrics & Gynecology and Pediatrics, McMaster University, Hamilton, Canada.
| | - Loreen Ehrlich
- Departments of Obstetrics and Division of Experimental Obstetrics, Charité - University Berlin, Augustenburger Platz 1, Berlin, Germany.
| | - Shaofu Li
- School of Women's and Infants' Health, King Edward Memorial Hospital, The University of Western Australia, and Women and Infants Research Foundation of Western Australia, Perth, Australia.
| | - John P Newnham
- School of Women's and Infants' Health, King Edward Memorial Hospital, The University of Western Australia, and Women and Infants Research Foundation of Western Australia, Perth, Australia.
| | - Joachim W Dudenhausen
- Departments of Obstetrics and Division of Experimental Obstetrics, Charité - University Berlin, Augustenburger Platz 1, Berlin, Germany.
| | - Wolfgang Henrich
- Departments of Obstetrics and Division of Experimental Obstetrics, Charité - University Berlin, Augustenburger Platz 1, Berlin, Germany.
| | - Andreas Plagemann
- Departments of Obstetrics and Division of Experimental Obstetrics, Charité - University Berlin, Augustenburger Platz 1, Berlin, Germany.
| | - John Rg Challis
- Departments of Physiology, Obstetrics and Gynecology, University of Toronto, Toronto, Canada. .,Faculty of Health Sciences, Simon Fraser University, Vancouver, Canada.
| | - Thorsten Braun
- Departments of Obstetrics and Division of Experimental Obstetrics, Charité - University Berlin, Augustenburger Platz 1, Berlin, Germany.
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Bolleyn J, Fraczek J, Rogiers V, Vanhaecke T. Epigenetic Modifications as Antidedifferentiation Strategy for Primary Hepatocytes in Culture. Methods Mol Biol 2015; 1250:203-211. [PMID: 26272144 DOI: 10.1007/978-1-4939-2074-7_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A well-known problem of cultured primary hepatocytes is their rapid dedifferentiation. During the last years, several strategies to counteract this phenomenon have been developed, of which changing the in vitro environment is the most popular one. However, mimicking the in vivo setting in vitro by adding soluble media additives or the restoration of both cell-cell and cell-extracellular matrix contacts is not sufficient and only delays the dedifferentiation process instead of counteracting it. In this chapter, new strategies to prevent the deterioration of the liver-specific phenotype of primary hepatocytes in culture by targeting the (epi)genetic mechanisms that drive hepatocellular gene expression are described.
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Affiliation(s)
- Jennifer Bolleyn
- Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090, Brussels, Belgium
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Nishida N, Kudo M. Alteration of Epigenetic Profile in Human Hepatocellular Carcinoma and Its Clinical Implications. Liver Cancer 2014; 3:417-27. [PMID: 26280003 PMCID: PMC4531427 DOI: 10.1159/000343860] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a common cancer worldwide and develops against a background of chronic liver damage. A variety of HCC-related genes are known to be altered by genetic and epigenetic mechanisms. Therefore, information regarding alteration of the genetic and epigenetic profiles in HCC is essential for understanding the biology of this type of tumor. Methylation at CpG sites in gene promoters is known to affect the transcription of the corresponding genes. Abnormal regional hypermethylation is observed in the 5' region of several tumor suppressor genes (TSGs) in HCC, and this hypermethylation may promote carcinogenesis through the transcriptional inactivation of downstream TSGs. The DNA damage induced by oxidation is a trigger of abnormal DNA methylation and inactivation of TSGs through recruitment of the polycomb repressive complex to the promoter sequence. Thus, oxidative stress may be responsible for the emergence of HCC from chronic hepatitis and liver cirrhosis through the epigenetic alteration of TSGs. There have been several attempts to apply epigenetic information to the diagnosis and treatment of HCC. The predictive value of selected methylation events on survival in HCC patients has been reported, and the methylation profile of background liver could be associated with recurrence-free survival of HCC patients who have undergone hepatectomy. Another study detected methylated DNA from HCC cells in serum, and the circulating tumor DNA was regarded as a potential tumor marker. In addition, several trials of HCC therapy have targeted the epigenetic machinery and were based upon comprehensive analyses of DNA methylation of this type of tumor. Here, we present an overview of research regarding DNA methylation status in human HCC and describe the clinical application of epigenetic information to HCC.
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Affiliation(s)
- Naoshi Nishida
- * Naoshi Nishida, MD, PhD, Department of Gastroenterology and Hepatology, Kinki University Faculty of Medicine, 337-2 Ohno-higashi, Osaka-sayama, Osaka 589-8511 (Japan), Tel. +81 72 366 0221, E-Mail
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Liu WH, Ren LN, Chen T, You N, Liu LY, Wang T, Yan HT, Luo H, Tang LJ. Unbalanced distribution of materials: the art of giving rise to hepatocytes from liver stem/progenitor cells. J Cell Mol Med 2013; 18:1-14. [PMID: 24286303 PMCID: PMC3916112 DOI: 10.1111/jcmm.12183] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 10/08/2013] [Indexed: 12/12/2022] Open
Abstract
Liver stem/progenitor cells (LSPCs) are able to duplicate themselves and differentiate into each type of cells in the liver, including mature hepatocytes and cholangiocytes. Understanding how to accurately control the hepatic differentiation of LSPCs is a challenge in many fields from preclinical to clinical treatments. This review summarizes the recent advances made to control the hepatic differentiation of LSPCs over the last few decades. The hepatic differentiation of LSPCs is a gradual process consisting of three main steps: initiation, progression and accomplishment. The unbalanced distribution of the affecting materials in each step results in the hepatic maturation of LSPCs. As the innovative and creative works for generating hepatocytes with full functions from LSPCs are gradually accumulated, LSPC therapies will soon be a new choice for treating liver diseases.
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Affiliation(s)
- Wei-Hui Liu
- General Surgery Center of PLA, Chengdu Military General Hospital, Chengdu, Sichuan Province, China
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34
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Godoy P, Hewitt NJ, Albrecht U, Andersen ME, Ansari N, Bhattacharya S, Bode JG, Bolleyn J, Borner C, Böttger J, Braeuning A, Budinsky RA, Burkhardt B, Cameron NR, Camussi G, Cho CS, Choi YJ, Craig Rowlands J, Dahmen U, Damm G, Dirsch O, Donato MT, Dong J, Dooley S, Drasdo D, Eakins R, Ferreira KS, Fonsato V, Fraczek J, Gebhardt R, Gibson A, Glanemann M, Goldring CEP, Gómez-Lechón MJ, Groothuis GMM, Gustavsson L, Guyot C, Hallifax D, Hammad S, Hayward A, Häussinger D, Hellerbrand C, Hewitt P, Hoehme S, Holzhütter HG, Houston JB, Hrach J, Ito K, Jaeschke H, Keitel V, Kelm JM, Kevin Park B, Kordes C, Kullak-Ublick GA, LeCluyse EL, Lu P, Luebke-Wheeler J, Lutz A, Maltman DJ, Matz-Soja M, McMullen P, Merfort I, Messner S, Meyer C, Mwinyi J, Naisbitt DJ, Nussler AK, Olinga P, Pampaloni F, Pi J, Pluta L, Przyborski SA, Ramachandran A, Rogiers V, Rowe C, Schelcher C, Schmich K, Schwarz M, Singh B, Stelzer EHK, Stieger B, Stöber R, Sugiyama Y, Tetta C, Thasler WE, Vanhaecke T, Vinken M, Weiss TS, Widera A, Woods CG, Xu JJ, Yarborough KM, Hengstler JG. Recent advances in 2D and 3D in vitro systems using primary hepatocytes, alternative hepatocyte sources and non-parenchymal liver cells and their use in investigating mechanisms of hepatotoxicity, cell signaling and ADME. Arch Toxicol 2013; 87:1315-530. [PMID: 23974980 PMCID: PMC3753504 DOI: 10.1007/s00204-013-1078-5] [Citation(s) in RCA: 1042] [Impact Index Per Article: 94.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 05/06/2013] [Indexed: 12/15/2022]
Abstract
This review encompasses the most important advances in liver functions and hepatotoxicity and analyzes which mechanisms can be studied in vitro. In a complex architecture of nested, zonated lobules, the liver consists of approximately 80 % hepatocytes and 20 % non-parenchymal cells, the latter being involved in a secondary phase that may dramatically aggravate the initial damage. Hepatotoxicity, as well as hepatic metabolism, is controlled by a set of nuclear receptors (including PXR, CAR, HNF-4α, FXR, LXR, SHP, VDR and PPAR) and signaling pathways. When isolating liver cells, some pathways are activated, e.g., the RAS/MEK/ERK pathway, whereas others are silenced (e.g. HNF-4α), resulting in up- and downregulation of hundreds of genes. An understanding of these changes is crucial for a correct interpretation of in vitro data. The possibilities and limitations of the most useful liver in vitro systems are summarized, including three-dimensional culture techniques, co-cultures with non-parenchymal cells, hepatospheres, precision cut liver slices and the isolated perfused liver. Also discussed is how closely hepatoma, stem cell and iPS cell-derived hepatocyte-like-cells resemble real hepatocytes. Finally, a summary is given of the state of the art of liver in vitro and mathematical modeling systems that are currently used in the pharmaceutical industry with an emphasis on drug metabolism, prediction of clearance, drug interaction, transporter studies and hepatotoxicity. One key message is that despite our enthusiasm for in vitro systems, we must never lose sight of the in vivo situation. Although hepatocytes have been isolated for decades, the hunt for relevant alternative systems has only just begun.
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Affiliation(s)
- Patricio Godoy
- Leibniz Research Centre for Working Environment and Human Factors (IFADO), 44139 Dortmund, Germany
| | | | - Ute Albrecht
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Melvin E. Andersen
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Nariman Ansari
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt am Main, Germany
| | - Sudin Bhattacharya
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Johannes Georg Bode
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Jennifer Bolleyn
- Department of Toxicology, Centre for Pharmaceutical Research, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Christoph Borner
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg, Germany
| | - Jan Böttger
- Institute of Biochemistry, Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Albert Braeuning
- Department of Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Wilhelmstr. 56, 72074 Tübingen, Germany
| | - Robert A. Budinsky
- Toxicology and Environmental Research and Consulting, The Dow Chemical Company, Midland, MI USA
| | - Britta Burkhardt
- BG Trauma Center, Siegfried Weller Institut, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | - Neil R. Cameron
- Department of Chemistry, Durham University, Durham, DH1 3LE UK
| | - Giovanni Camussi
- Department of Medical Sciences, University of Torino, 10126 Turin, Italy
| | - Chong-Su Cho
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921 Korea
| | - Yun-Jaie Choi
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921 Korea
| | - J. Craig Rowlands
- Toxicology and Environmental Research and Consulting, The Dow Chemical Company, Midland, MI USA
| | - Uta Dahmen
- Experimental Transplantation Surgery, Department of General Visceral, and Vascular Surgery, Friedrich-Schiller-University Jena, 07745 Jena, Germany
| | - Georg Damm
- Department of General-, Visceral- and Transplantation Surgery, Charité University Medicine Berlin, 13353 Berlin, Germany
| | - Olaf Dirsch
- Institute of Pathology, Friedrich-Schiller-University Jena, 07745 Jena, Germany
| | - María Teresa Donato
- Unidad de Hepatología Experimental, IIS Hospital La Fe Avda Campanar 21, 46009 Valencia, Spain
- CIBERehd, Fondo de Investigaciones Sanitarias, Barcelona, Spain
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Universidad de Valencia, Valencia, Spain
| | - Jian Dong
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Steven Dooley
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Dirk Drasdo
- Interdisciplinary Center for Bioinformatics (IZBI), University of Leipzig, 04107 Leipzig, Germany
- INRIA (French National Institute for Research in Computer Science and Control), Domaine de Voluceau-Rocquencourt, B.P. 105, 78153 Le Chesnay Cedex, France
- UPMC University of Paris 06, CNRS UMR 7598, Laboratoire Jacques-Louis Lions, 4, pl. Jussieu, 75252 Paris cedex 05, France
| | - Rowena Eakins
- Department of Molecular and Clinical Pharmacology, Centre for Drug Safety Science, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Karine Sá Ferreira
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg, Germany
- GRK 1104 From Cells to Organs, Molecular Mechanisms of Organogenesis, Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Valentina Fonsato
- Department of Medical Sciences, University of Torino, 10126 Turin, Italy
| | - Joanna Fraczek
- Department of Toxicology, Centre for Pharmaceutical Research, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Rolf Gebhardt
- Institute of Biochemistry, Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Andrew Gibson
- Department of Molecular and Clinical Pharmacology, Centre for Drug Safety Science, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Matthias Glanemann
- Department of General-, Visceral- and Transplantation Surgery, Charité University Medicine Berlin, 13353 Berlin, Germany
| | - Chris E. P. Goldring
- Department of Molecular and Clinical Pharmacology, Centre for Drug Safety Science, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - María José Gómez-Lechón
- Unidad de Hepatología Experimental, IIS Hospital La Fe Avda Campanar 21, 46009 Valencia, Spain
- CIBERehd, Fondo de Investigaciones Sanitarias, Barcelona, Spain
| | - Geny M. M. Groothuis
- Department of Pharmacy, Pharmacokinetics Toxicology and Targeting, University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Lena Gustavsson
- Department of Laboratory Medicine (Malmö), Center for Molecular Pathology, Lund University, Jan Waldenströms gata 59, 205 02 Malmö, Sweden
| | - Christelle Guyot
- Department of Clinical Pharmacology and Toxicology, University Hospital, 8091 Zurich, Switzerland
| | - David Hallifax
- Centre for Applied Pharmacokinetic Research (CAPKR), School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Oxford Road, Manchester, M13 9PT UK
| | - Seddik Hammad
- Department of Forensic Medicine and Veterinary Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Adam Hayward
- Biological and Biomedical Sciences, Durham University, Durham, DH13LE UK
| | - Dieter Häussinger
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Claus Hellerbrand
- Department of Medicine I, University Hospital Regensburg, 93053 Regensburg, Germany
| | | | - Stefan Hoehme
- Interdisciplinary Center for Bioinformatics (IZBI), University of Leipzig, 04107 Leipzig, Germany
| | - Hermann-Georg Holzhütter
- Institut für Biochemie Abteilung Mathematische Systembiochemie, Universitätsmedizin Berlin (Charité), Charitéplatz 1, 10117 Berlin, Germany
| | - J. Brian Houston
- Centre for Applied Pharmacokinetic Research (CAPKR), School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Oxford Road, Manchester, M13 9PT UK
| | | | - Kiyomi Ito
- Research Institute of Pharmaceutical Sciences, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo, 202-8585 Japan
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160 USA
| | - Verena Keitel
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | | | - B. Kevin Park
- Department of Molecular and Clinical Pharmacology, Centre for Drug Safety Science, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Claus Kordes
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, Heinrich-Heine-University, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Gerd A. Kullak-Ublick
- Department of Clinical Pharmacology and Toxicology, University Hospital, 8091 Zurich, Switzerland
| | - Edward L. LeCluyse
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Peng Lu
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | | | - Anna Lutz
- Department of Pharmaceutical Biology and Biotechnology, University of Freiburg, Freiburg, Germany
| | - Daniel J. Maltman
- Reinnervate Limited, NETPark Incubator, Thomas Wright Way, Sedgefield, TS21 3FD UK
| | - Madlen Matz-Soja
- Institute of Biochemistry, Faculty of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Patrick McMullen
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Irmgard Merfort
- Department of Pharmaceutical Biology and Biotechnology, University of Freiburg, Freiburg, Germany
| | | | - Christoph Meyer
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Jessica Mwinyi
- Department of Clinical Pharmacology and Toxicology, University Hospital, 8091 Zurich, Switzerland
| | - Dean J. Naisbitt
- Department of Molecular and Clinical Pharmacology, Centre for Drug Safety Science, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Andreas K. Nussler
- BG Trauma Center, Siegfried Weller Institut, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | - Peter Olinga
- Division of Pharmaceutical Technology and Biopharmacy, Department of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Francesco Pampaloni
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt am Main, Germany
| | - Jingbo Pi
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Linda Pluta
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | - Stefan A. Przyborski
- Reinnervate Limited, NETPark Incubator, Thomas Wright Way, Sedgefield, TS21 3FD UK
- Biological and Biomedical Sciences, Durham University, Durham, DH13LE UK
| | - Anup Ramachandran
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160 USA
| | - Vera Rogiers
- Department of Toxicology, Centre for Pharmaceutical Research, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Cliff Rowe
- Department of Molecular and Clinical Pharmacology, Centre for Drug Safety Science, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Celine Schelcher
- Department of Surgery, Liver Regeneration, Core Facility, Human in Vitro Models of the Liver, Ludwig Maximilians University of Munich, Munich, Germany
| | - Kathrin Schmich
- Department of Pharmaceutical Biology and Biotechnology, University of Freiburg, Freiburg, Germany
| | - Michael Schwarz
- Department of Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Wilhelmstr. 56, 72074 Tübingen, Germany
| | - Bijay Singh
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921 Korea
| | - Ernst H. K. Stelzer
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt am Main, Germany
| | - Bruno Stieger
- Department of Clinical Pharmacology and Toxicology, University Hospital, 8091 Zurich, Switzerland
| | - Regina Stöber
- Leibniz Research Centre for Working Environment and Human Factors (IFADO), 44139 Dortmund, Germany
| | - Yuichi Sugiyama
- Sugiyama Laboratory, RIKEN Innovation Center, RIKEN, Yokohama Biopharmaceutical R&D Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
| | - Ciro Tetta
- Fresenius Medical Care, Bad Homburg, Germany
| | - Wolfgang E. Thasler
- Department of Surgery, Ludwig-Maximilians-University of Munich Hospital Grosshadern, Munich, Germany
| | - Tamara Vanhaecke
- Department of Toxicology, Centre for Pharmaceutical Research, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Mathieu Vinken
- Department of Toxicology, Centre for Pharmaceutical Research, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Thomas S. Weiss
- Department of Pediatrics and Juvenile Medicine, University of Regensburg Hospital, Regensburg, Germany
| | - Agata Widera
- Leibniz Research Centre for Working Environment and Human Factors (IFADO), 44139 Dortmund, Germany
| | - Courtney G. Woods
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC USA
| | | | | | - Jan G. Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IFADO), 44139 Dortmund, Germany
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Christ GJ, Saul JM, Furth ME, Andersson KE. The pharmacology of regenerative medicine. Pharmacol Rev 2013; 65:1091-133. [PMID: 23818131 DOI: 10.1124/pr.112.007393] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Regenerative medicine is a rapidly evolving multidisciplinary, translational research enterprise whose explicit purpose is to advance technologies for the repair and replacement of damaged cells, tissues, and organs. Scientific progress in the field has been steady and expectations for its robust clinical application continue to rise. The major thesis of this review is that the pharmacological sciences will contribute critically to the accelerated translational progress and clinical utility of regenerative medicine technologies. In 2007, we coined the phrase "regenerative pharmacology" to describe the enormous possibilities that could occur at the interface between pharmacology, regenerative medicine, and tissue engineering. The operational definition of regenerative pharmacology is "the application of pharmacological sciences to accelerate, optimize, and characterize (either in vitro or in vivo) the development, maturation, and function of bioengineered and regenerating tissues." As such, regenerative pharmacology seeks to cure disease through restoration of tissue/organ function. This strategy is distinct from standard pharmacotherapy, which is often limited to the amelioration of symptoms. Our goal here is to get pharmacologists more involved in this field of research by exposing them to the tools, opportunities, challenges, and interdisciplinary expertise that will be required to ensure awareness and galvanize involvement. To this end, we illustrate ways in which the pharmacological sciences can drive future innovations in regenerative medicine and tissue engineering and thus help to revolutionize the discovery of curative therapeutics. Hopefully, the broad foundational knowledge provided herein will spark sustained conversations among experts in diverse fields of scientific research to the benefit of all.
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Affiliation(s)
- George J Christ
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27101, USA.
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Collings CK, Waddell PJ, Anderson JN. Effects of DNA methylation on nucleosome stability. Nucleic Acids Res 2013; 41:2918-31. [PMID: 23355616 PMCID: PMC3597673 DOI: 10.1093/nar/gks893] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Methylation of DNA at CpG dinucleotides represents one of the most important epigenetic mechanisms involved in the control of gene expression in vertebrate cells. In this report, we conducted nucleosome reconstitution experiments in conjunction with high-throughput sequencing on 572 KB of human DNA and 668 KB of mouse DNA that was unmethylated or methylated in order to investigate the effects of this epigenetic modification on the positioning and stability of nucleosomes. The results demonstrated that a subset of nucleosomes positioned by nucleotide sequence was sensitive to methylation where the modification increased the affinity of these sequences for the histone octamer. The features that distinguished these nucleosomes from the bulk of the methylation-insensitive nucleosomes were an increase in the frequency of CpG dinucleotides and a unique rotational orientation of CpGs such that their minor grooves tended to face toward the histones in the nucleosome rather than away. These methylation-sensitive nucleosomes were preferentially associated with exons as compared to introns while unmethylated CpG islands near transcription start sites became enriched in nucleosomes upon methylation. The results of this study suggest that the effects of DNA methylation on nucleosome stability in vitro can recapitulate what has been observed in the cell and provide a direct link between DNA methylation and the structure and function of chromatin.
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Affiliation(s)
- Clayton K Collings
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
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Fraczek J, Bolleyn J, Vanhaecke T, Rogiers V, Vinken M. Primary hepatocyte cultures for pharmaco-toxicological studies: at the busy crossroad of various anti-dedifferentiation strategies. Arch Toxicol 2012; 87:577-610. [PMID: 23242478 DOI: 10.1007/s00204-012-0983-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 11/19/2012] [Indexed: 01/24/2023]
Abstract
Continuously increasing understanding of the molecular triggers responsible for the onset of diseases, paralleled by an equally dynamic evolution of chemical synthesis and screening methods, offers an abundance of pharmacological agents with a potential to become new successful drugs. However, before patients can benefit of newly developed pharmaceuticals, stringent safety filters need to be applied to weed out unfavourable drug candidates. Cost effectiveness and the need to identify compound liabilities, without exposing humans to unnecessary risks, has stimulated the shift of the safety studies to the earliest stages of drug discovery and development. In this regard, in vivo relevant organotypic in vitro models have high potential to revolutionize the preclinical safety testing. They can enable automation of the process, to match the requirements of high-throughput screening approaches, while satisfying ethical considerations. Cultures of primary hepatocytes became already an inherent part of the preclinical pharmaco-toxicological testing battery, yet their routine use, particularly for long-term assays, is limited by the progressive deterioration of liver-specific features. The availability of suitable hepatic and other organ-specific in vitro models is, however, of paramount importance in the light of changing European legal regulations in the field of chemical compounds of different origin, which gradually restrict the use of animal studies for safety assessment, as currently witnessed in cosmetic industry. Fortunately, research groups worldwide spare no effort to establish hepatic in vitro systems. In the present review, both classical and innovative methodologies to stabilize the in vivo-like hepatocyte phenotype in culture of primary hepatocytes are presented and discussed.
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Affiliation(s)
- J Fraczek
- Department of Toxicology, Faculty of Medicine and Pharmacy, Centre for Pharmaceutical Research, Vrije Universiteit Brussel, Belgium.
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Lu H, Cui JY, Gunewardena S, Yoo B, Zhong XB, Klaassen CD. Hepatic ontogeny and tissue distribution of mRNAs of epigenetic modifiers in mice using RNA-sequencing. Epigenetics 2012; 7:914-29. [PMID: 22772165 DOI: 10.4161/epi.21113] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Developmental regulation of gene expression is controlled by distinct epigenetic signatures catalyzed by various epigenetic modifiers. Little is known about the ontogeny and tissue distribution of these epigenetic modifiers. In the present study, we used a novel approach of RNA-sequencing to elucidate hepatic ontogeny and tissue distribution of mRNA expression of 142 epigenetic modifiers, including enzymes involved in DNA methylation/demethylation, histone acetylation/deacetylation, histone methylation/demethylation, histone phosphorylation and chromosome remodeling factors in male C57BL/6 mice. Livers from male C57BL/6 mice were collected at 12 ages from prenatal to adulthood. Many of these epigenetic modifiers were expressed at much higher levels in perinatal livers than adult livers, such as Dnmt1, Dnmt3a, Dnmt3b, Apobec3, Kat1, Ncoa4, Setd8, Ash2l, Dot1l, Cbx1, Cbx3, Cbx5, Cbx6, Ezh2, Suz12, Eed, Suv39h1, Suv420h2, Dek, Hdac1, Hdac2, Hdac7, Kdm2b, Kdm5c, Kdm7, Prmt1-5, Prmt7, Smarca4, Smarcb1, Chd4 and Ino80e. In contrast, hepatic mRNA expression of a few epigenetic modifiers increased during postnatal liver development, such as Smarca2, Kdm1b, Cbx7 and Chd3. In adult mice (60 d of age), most epigenetic modifiers were expressed at moderately (1-3-fold) higher levels in kidney and/or small intestine than liver. In conclusion, this study, for the first time, unveils developmental changes in mRNA abundance of all major known epigenetic modifiers in mouse liver. These data suggest that ontogenic changes in mRNA expression of epigenetic modifiers may play important roles in determining the addition and/or removal of corresponding epigenetic signatures during liver development.
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Affiliation(s)
- Hong Lu
- Department of Pharmacology, SUNY Upstate Medical University, Syracuse, NY, USA.
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Seeliger C, Culmes M, Schyschka L, Yan X, Damm G, Wang Z, Kleeff J, Thasler WE, Hengstler J, Stöckle U, Ehnert S, Nüssler AK. Decrease of global methylation improves significantly hepatic differentiation of Ad-MSCs: possible future application for urea detoxification. Cell Transplant 2012; 22:119-31. [PMID: 22507189 DOI: 10.3727/096368912x638946] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Hepatocyte transplantation is considered to be an alternative to orthotopic liver transplantation. Cells can be used to bridge patients waiting for a donor organ, decrease mortality in acute liver failure, and support metabolic liver diseases. The limited availability of primary human hepatocytes for such applications has led to the generation of alternative hepatocyte-like cells from various adult stem or precursor cells. The aim of this study was to generate hepatocyte-like cells from adipose-derived mesenchymal stem cells (Ad-MSCs) for clinical applications, which are available "off the shelf." Epigenetic changes in hepatocyte-like cells were induced by 5-azacytidine, which, in combination with other supplements, leads to significantly improved metabolic and enzymatic activities compared to nontreated cells. Cells with sufficient hepatic features were generated with a four-step protocol: 5-azacytidine (step 1); epidermal growth factor (step 2); fibroblast growth factor-4, dexamethasone, insulin-transferrin-sodium-selenite, and nicotinamide (step 3); and hepatocyte growth factor, dexamethasone, insulin-transferrin-sodium-selenite, and nicotinamide (step 4). Generated differentiated cells had higher phase I (CYP1A1/2, CYP2E1, CYP2B6, CYP3A4) and phase II activities compared to the undifferentiated cells. A strong expression of CYP3A7 and a weak expression of 3A4, as well as the important detoxification markers α-fetoprotein and albumin, could also be detected at the mRNA level. Importantly, urea metabolism (basal, NH4-stimulated, NH4- and ornithine-stimulated) was comparable to freshly isolated human hepatocytes, and unlike cryopreserved human hepatocytes, this activity was maintained after 6 months of cryopreservation. These findings suggest that these cells may be suitable for clinical application, especially for treatment of urea cycle disorders.
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Affiliation(s)
- C Seeliger
- Technical University Munich, MRI, Department of Trauma Surgery, Germany
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Casati L, Sendra R, Colciago A, Negri-Cesi P, Berdasco M, Esteller M, Celotti F. Polychlorinated biphenyls affect histone modification pattern in early development of rats: a role for androgen receptor-dependent modulation? Epigenomics 2012; 4:101-12. [DOI: 10.2217/epi.11.110] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background: The epigenome represents an important target of environmental pollution. Early-life exposure to polychlorinated biphenyls (PCBs) modifies sex steroid enzymes and receptor transcription patterns. Steroid receptors, such as androgen receptor (AR), function as coregulators of histone modification enzymes. Aim: To clarify if a PCB early-life exposure might affect the epigenome in rat liver, we analyzed some histone post-translational modifications (H3K4me3 and H4K16Ac) and the corresponding histone remodeling enzymes, and the AR as a histone enzyme coregulator. Results: We observed a decrease of H4K16Ac and H3K4me3 levels, possibly linked to the induction of chromatin-modifying enzymes SirtT1 and Jarid1b, and a decrease of AR. PCBs also seem to induce AR transcriptional activity. Some of the observed effects are sex dimorphic. Conclusion: Our data suggest that an early-life exposure to PCB sometimes modifies the epigenome in the offspring liver in a dimorphic way. AR might be involved in modulating PCB effects on the epigenome.
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Affiliation(s)
| | - Ramon Sendra
- Departament de Bioquímica i Biologia Molecular Universitat de València, C/Dr Moliner 50, 46100-Burjassot, València, Spain
| | - Alessandra Colciago
- Department of Endocrinology, Pathophysiology & Applied Biology, INBB Research Unit, University of Milano, Via Balzaretti 9, 20133 Milano, Italy
| | - Paola Negri-Cesi
- Department of Endocrinology, Pathophysiology & Applied Biology, INBB Research Unit, University of Milano, Via Balzaretti 9, 20133 Milano, Italy
| | - Maria Berdasco
- Cancer Epigenetics & Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), L’Hospitalet, Barcelona, Catalonia, Spain
| | - Manel Esteller
- Cancer Epigenetics & Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), L’Hospitalet, Barcelona, Catalonia, Spain
| | - Fabio Celotti
- Department of Endocrinology, Pathophysiology & Applied Biology, INBB Research Unit, University of Milano, Via Balzaretti 9, 20133 Milano, Italy
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Clinical and laboratory evaluation of patients with end-stage liver cell failure injected with bone marrow-derived hepatocyte-like cells. Eur J Gastroenterol Hepatol 2011; 23:936-41. [PMID: 21900788 DOI: 10.1097/meg.0b013e3283488b00] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM One of the defining features of the liver is the capacity to maintain a constant size despite injury. Extrahepatic stem cells especially bone marrow-derived stem cells are thought to undertake an important role in liver repopulation. This study was carried out to evaluate the outcome of autologous bone marrow-derived hepatocytes transplantation in patients with end-stage liver cell failure due to chronic hepatitis C. METHODS Forty patients were included, divided into two groups. Group I: 20 patients receiving autologous bone marrow-derived mesenchymal stem cells stimulated to hepatic lineage. They were subdivided into two groups regarding the route of transplantation: intrasplenic (10) and intrahepatic (10). Group II: included 20 patients who received traditional supportive treatment. Patients were followed up using examination, laboratory investigations, abdominal ultrasonography, and evaluated by Child score, Model for End Stage Liver Disease score, fatigue scale, and performance status. RESULTS The results showed significant improvement in group I regarding ascites, lower limb edema, and serum albumin, over the control group. Group I also showed statistically significant improvement in Child score, Model for End Stage Liver Disease score, fatigue scale, and performance status over the controls. No difference was observed between intrahepatic and intrasplenic groups. CONCLUSION This study demonstrated the safety and short-term efficacy of autologous bone marrow-derived mesenchymal stem cell injection in liver cell failure. Further study is necessary to standardize the cell dose, determine the life span of the injected cells, and detect the appearance of long-term complications.
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Synergetic effects of DNA demethylation and histone deacetylase inhibition in primary rat hepatocytes. Invest New Drugs 2011; 30:1715-24. [DOI: 10.1007/s10637-011-9659-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 03/15/2011] [Indexed: 12/16/2022]
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Mesenchymal stem cell infusion therapy in a carbon tetrachloride-induced liver fibrosis model affects matrix metalloproteinase expression. Cell Biol Int 2010; 34:601-5. [PMID: 20178458 DOI: 10.1042/cbi20090386] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In order to investigate the effects of bone marrow-derived MSCs (mesenchymal stem cells) in reversing liver fibrosis and to determine their possible mechanism of action, mouse MSCs were infused into the tail vein of a CCl(4) injection mouse chronic model. MSCs caused a decrease in liver fibrosis histopathologically, 4 weeks after transplantation. The reduction in liver collagen was confirmed by quantitative analysis. Moreover, lipid peroxidation in the CCl(4)/MSC group decreased significantly. Quantitative RT (reverse transcription)-PCR analysis showed administration of MSCs has a significant antifibrotic effect as evidenced by the decrease in expression of liver collagen and increase in MMP13 (matrix metalloproteinase 13) in the CCl(4)/MSC group when compared with the CCl(4) group, 4 weeks after transplantation. The expression of alphaSMA (smooth muscle actin) and TIMP1 was also down-regulated in the CCl(4)/MSC group. Additionally, the expression of MMP9 was significantly up-regulated in the CCl(4)-treated group; however, there was no significant change after MSC injection. Few engrafted cells in the recipient liver and were able to differentiate into albumin-positive cells. In conclusion, MSCs can enhance recovery of a CCl(4)-injured mouse liver through their influence in reducing collagen deposition by possibly affecting expression of MMPs.
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Cruickshank MN, Besant P, Ulgiati D. The impact of histone post-translational modifications on developmental gene regulation. Amino Acids 2010; 39:1087-105. [PMID: 20204433 DOI: 10.1007/s00726-010-0530-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Accepted: 02/12/2010] [Indexed: 02/06/2023]
Abstract
Eukaryotic genomic DNA is orderly compacted to fit into the nucleus and to inhibit accessibility of specific sequences. DNA is manipulated in many different ways by bound RNA and proteins within the composite material known as chromatin. All of the biological processes that require access to genomic DNA (such as replication, recombination and transcription) therefore are dependent on the precise characteristics of chromatin in eukaryotes. This distinction underlies a fundamental property of eukaryotic versus prokaryotic gene regulation such that chromatin structure must be regulated to precisely repress or relieve repression of particular regions of the genome in an appropriate spatio-temporal manner. As well as playing a key role in structuring genomic DNA, histones are subject to site-specific modifications that can influence the organization of chromatin structure. This review examines the molecular processes regulating site-specific histone acetylation, methylation and phosphorylation with an emphasis on how these processes underpin differentiation-regulated transcription.
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Affiliation(s)
- Mark N Cruickshank
- Biochemistry and Molecular Biology, School of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
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Munro SK, Farquhar CM, Mitchell MD, Ponnampalam AP. Epigenetic regulation of endometrium during the menstrual cycle. Mol Hum Reprod 2010; 16:297-310. [PMID: 20139117 DOI: 10.1093/molehr/gaq010] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The endometrium undergoes morphological and functional changes during the menstrual cycle which are essential for uterine receptivity. These changes are driven by estrogen and progesterone and involve the fine control of many different genes-several of which have been identified as being epigenetically regulated. Epigenetic modification may therefore influence the functional changes in the endometrium required for successful implantation. There is, however, only limited information on epigenetic regulation in endometrium. We review the potential role of epigenetic regulation of key processes during the menstrual cycle and present our own findings following a preliminary study into global acetylation levels in the human endometrium. A changing epigenetic state is associated with the differentiation of stem cells into different lineages and thus may be involved in endometrial regeneration. Histone acetylation is implicated in the vascular endothelial growth factor pathway during angiogenesis, and studies using histone deacetylase inhibitors suggest an involvement in endometrial proliferation and differentiation. The processes of decidualization and implantation are also associated with epigenetic change and epigenetic modulators show variable expression across the menstrual cycle. Our own studies found that endometrial global histone acetylation, as determined by western blotting, changed throughout the menstrual cycle and correlated well with expected transcription activity during the different phases. This suggests that epigenetics may be involved in the regulation of endometrial gene expression during the menstrual cycle and that abnormal epigenetic modifications may therefore be associated with implantation failure and early pregnancy loss as well as with other endometrial pathologies.
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Affiliation(s)
- S K Munro
- The Liggins Institute, The University of Auckland, Auckland 1142, New Zealand
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Dollé L, Best J, Mei J, Al Battah F, Reynaert H, van Grunsven LA, Geerts A. The quest for liver progenitor cells: a practical point of view. J Hepatol 2010; 52:117-29. [PMID: 19913937 DOI: 10.1016/j.jhep.2009.10.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Many chronic liver diseases can lead to hepatic dysfunction with organ failure. At present, orthotopic liver transplantation represents the benchmark therapy of terminal liver disease. However this practice is limited by shortage of donor grafts, the need for lifelong immunosuppression and very demanding state-of-the-art surgery. For this reason, new therapies have been developed to restore liver function, primarily in the form of hepatocyte transplantation and artificial liver support devices. While already offered in very specialized centers, both of these modalities still remain experimental. Recently, liver progenitor cells have shown great promise for cell therapy, and consequently they have attracted a lot of attention as an alternative or supportive tool for liver transplantation. These liver progenitor cells are quiescent in the healthy liver and become activated in certain liver diseases in which the regenerative capacity of mature hepatocytes and/or cholangiocytes is impaired. Although reports describing liver progenitor cells are numerous, they have not led to a consensus on the identity of the liver progenitor cell. In this review, we will discuss some of the characteristics of these cells and the different ways that have been used to obtain these from rodents. We will also highlight the challenges that researchers are facing in their quest to identify and use liver progenitor cells.
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Affiliation(s)
- Laurent Dollé
- Department of Cell Biology, Vrije Universiteit Brussel, Belgium
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