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Development of mode of action networks related to the potential role of PPARγ in respiratory diseases. Pharmacol Res 2021; 172:105821. [PMID: 34403731 DOI: 10.1016/j.phrs.2021.105821] [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] [Received: 02/04/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 11/30/2022]
Abstract
The peroxisome proliferator-activated receptor γ (PPARγ) is a key transcription factor, operating at the intercept of metabolic control and immunomodulation. It is ubiquitously expressed in multiple tissues and organs, including lungs. There is a growing body of information supporting the role of PPARγ signalling in respiratory diseases. The aim of the present study was to develop mode of action (MoA) networks reflecting the relationships between PPARγ signalling and the progression/alleviation of a spectrum of lung pathologies. Data mining was performed using the resources of the NIH PubMed and PubChem information systems. By linking available data on pathological/therapeutic effects of PPARγ modulation, knowledge-based MoA networking at different levels of biological organization (molecular, cellular, tissue, organ, and system) was performed. Multiple MoA networks were developed to relate PPARγ modulation to the progress or the alleviation of pulmonary disorders, triggered by diverse pathogenic, genetic, chemical, or mechanical factors. Pharmacological targeting of PPARγ signalling was discussed with regard to ligand- and cell type-specific effects in the context of distinct disease inductor- and disease stage-dependent patterns. The proposed MoA networking analysis allows for a better understanding of the potential role of PPARγ modulation in lung pathologies. It presents a mechanistically justified basis for further computational, experimental, and clinical monitoring studies on the dynamic control of PPARγ signalling in respiratory diseases.
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Wang Z, Chen J, Hong H. Developing QSAR Models with Defined Applicability Domains on PPARγ Binding Affinity Using Large Data Sets and Machine Learning Algorithms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:6857-6866. [PMID: 33914508 DOI: 10.1021/acs.est.0c07040] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Chemicals may cause adverse effects on human health through binding to peroxisome proliferator-activated receptor γ (PPARγ). Hence, binding affinity is useful for evaluating chemicals with potential endocrine-disrupting effects. Quantitative structure-activity relationship (QSAR) regression models with defined applicability domains (ADs) are important to enable efficient screening of chemicals with PPARγ binding activity. However, lack of large data sets hindered the development of QSAR models. In this study, based on PPARγ binding affinity data sets curated from various sources, 30 QSAR models were developed using molecular fingerprints, two-dimensional descriptors, and five machine learning algorithms. Structure-activity landscapes (SALs) of the training compounds were described by network-like similarity graphs (NSGs). Based on the NSGs, local discontinuity scores were calculated and found to be positively correlated with the cross-validation absolute prediction errors of the models using the different training sets, descriptors, and algorithms. Moreover, innovative ADs were defined based on pairwise similarities between compounds and were found to outperform some conventional ADs. The curated data sets and developed regression models could be useful for evaluating PPARγ-involved adverse effects of chemicals. The SAL analysis and the innovative ADs could facilitate understanding of prediction results from QSAR models.
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Affiliation(s)
- Zhongyu Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Huixiao Hong
- National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, Arkansas 72079, United States
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Li CH, Shi YL, Li M, Guo LH, Cai YQ. Receptor-Bound Perfluoroalkyl Carboxylic Acids Dictate Their Activity on Human and Mouse Peroxisome Proliferator-Activated Receptor γ. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:9529-9536. [PMID: 32639727 DOI: 10.1021/acs.est.0c02386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In in vitro cell assays, nominal concentrations of a test chemical are most frequently used in the description of its dose-response curves. Although the biologically effective concentration (BEC) is considered as the most relevant dose metric, in practice, it is very difficult to measure. In this work, we attempted to determine the BEC of long-chain perfluoroalkyl carboxylic acids (PFCAs) in peroxisome proliferator-activated receptor γ (PPARγ) activity assays. In both adipogenesis and transcriptional activity assays with human and mouse cells, PPARγ activity of 7 PFCAs first increased and then decreased with their carbon chain length. The binding affinity of these PFCAs with the ligand-binding domain of PPARγ was measured by fluorescence competitive binding assay and showed very poor correlation with their receptor activity (r2 = 0.002-0.047). Internal concentrations of the PFCAs in the cells were measured by LC-MS/MS. Although their correlation with the receptor activity increased significantly, it is still low (r2 = 0.41-0.82). Using the binding affinity constant, internal concentration, and PPARγ concentration measured by immunoassays, concentrations of receptor-bound PFCAs in cells were calculated, which exhibited excellent correlation with PPARγ activity in both adipogenesis and transcriptional activity assays (r2 = 0.91-0.93). These results demonstrate that the concentration of receptor-bound PFCA is the BEC that dictates its activity on human and mouse PPARγ in cell assays. In the absence of any direct detection method, our approach can be used to calculate the target-site concentration of other ligands.
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Affiliation(s)
- Chuan-Hai Li
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
- School of Public Health, Qingdao University, 308 Ningxia Street, Qingdao, Shandong 266071, China
| | - Ya-Li Shi
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
| | - Minjie Li
- College of Quality & Safety Engineering, China Jiliang University, 258 Xueyuan Street, Hangzhou, Zhejiang 310018, China
| | - Liang-Hong Guo
- Institute of Environmental and Health Sciences, China Jiliang University, 168 Xueyuan Street, Hangzhou, Zhejiang 310018, China
- Institute of Environmental and Health, Jianghan University, Wuhan, Hubei 430056, China
| | - Ya-Qi Cai
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
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Albhaisi S, Sanyal AJ. Applying Non-Invasive Fibrosis Measurements in NAFLD/NASH: Progress to Date. Pharmaceut Med 2020; 33:451-463. [PMID: 31933238 DOI: 10.1007/s40290-019-00305-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) has now become a worldwide health issue due to the obesity epidemic, affecting approximately 90% of the obese population and 15-40% of the general population. It is the most common form of chronic liver disease in the United States. NAFLD constitutes a spectrum of diseases ranging in severity from mild, such as fatty liver, progressing into nonalcoholic steatohepatitis (NASH), then fibrosis, and ending with cirrhosis. NASH and increasing fibrosis stage are associated with increased morbidity and mortality; the fibrosis stage is therefore a critical element of risk stratification needed to determine therapeutic approach and also the response to treatment. Liver biopsy is considered the 'gold standard' in the diagnosis of NAFLD. However, it is not practical for widespread clinical use because it is invasive, costly, and associated with complications including occasional death. These limitations have driven the development of noninvasive tests that can accurately predict the fibrosis stage in those with NAFLD. In this review, we provide a concise overview of different non-invasive measurements used for NAFLD/NASH.
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Affiliation(s)
- Somaya Albhaisi
- Department of Internal Medicine, Virginia Commonwealth University, Box 980102, Richmond, VA, 23298, USA
| | - Arun J Sanyal
- Division of Gastroenterology, Hepatology and Nutrition, Department of Internal Medicine, Virginia Commonwealth University, Box 980341, Richmond, VA, 23298, USA.
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Wang Z, Chen J, Hong H. Applicability Domains Enhance Application of PPARγ Agonist Classifiers Trained by Drug-like Compounds to Environmental Chemicals. Chem Res Toxicol 2020; 33:1382-1388. [DOI: 10.1021/acs.chemrestox.9b00498] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhongyu Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Huixiao Hong
- National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, Arkansas, United States
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Navarro-Imaz H, Chico Y, Rueda Y, Fresnedo O. Channeling of newly synthesized fatty acids to cholesterol esterification limits triglyceride synthesis in SND1-overexpressing hepatoma cells. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1864:137-146. [PMID: 30448348 DOI: 10.1016/j.bbalip.2018.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 10/11/2018] [Accepted: 11/11/2018] [Indexed: 12/15/2022]
Abstract
SND1 is a putative oncoprotein whose molecular function remains unclear. Its overexpression in hepatocellular carcinoma impairs cholesterol homeostasis due to the altered activation of the sterol regulatory element-binding protein (SREBP) 2, which results in the accumulation of cellular cholesteryl esters (CE). In this work, we explored whether high cholesterol synthesis and esterification originates changes in glycerolipid metabolism that might affect cell growth, given that acetyl-coenzyme A is required for cholesterogenesis and fatty acids (FA) are the substrates of acyl-coenzyme A:cholesterol acyltransferase (ACAT). SND1-overexpressing hepatoma cells show low triglyceride (TG) synthesis, but phospholipid biosynthesis or cell growth is not affected. Limited TG synthesis is not due to low acetyl-coenzyme A or NADPH availability. We demonstrate that the main factor limiting TG synthesis is the utilization of FAs for cholesterol esterification. These metabolic adaptations are linked to high Scd1 expression, needed for the de novo production of oleic acid, the main FA used by ACAT. We conclude that high cholesterogenesis due to SND1 overexpression might determine the channeling of FAs to CEs.
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Affiliation(s)
- Hiart Navarro-Imaz
- Lipids & Liver Research Group, Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, B° Sarriena s/n, 48940 Leioa, Spain.
| | - Yolanda Chico
- Lipids & Liver Research Group, Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, B° Sarriena s/n, 48940 Leioa, Spain.
| | - Yuri Rueda
- Lipids & Liver Research Group, Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, B° Sarriena s/n, 48940 Leioa, Spain.
| | - Olatz Fresnedo
- Lipids & Liver Research Group, Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, B° Sarriena s/n, 48940 Leioa, Spain.
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Sex-specific differences in hepatic steatosis in obese spontaneously hypertensive (SHROB) rats. Biol Sex Differ 2018; 9:40. [PMID: 30201044 PMCID: PMC6131947 DOI: 10.1186/s13293-018-0202-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 08/31/2018] [Indexed: 12/12/2022] Open
Abstract
Background Patients with metabolic syndrome, who are characterized by co-existence of insulin resistance, hypertension, hyperlipidemia, and obesity, are also prone to develop non-alcoholic fatty liver disease (NAFLD). Although the prevalence and severity of NAFLD is significantly greater in men than women, the mechanisms by which gender modulates the pathogenesis of hepatic steatosis are poorly defined. The obese spontaneously hypertensive (SHROB) rats represent an attractive model of metabolic syndrome without overt type 2 diabetes. Although pathological manifestation caused by the absence of a functional leptin receptor has been extensively studied in SHROB rats, it is unknown whether these animals elicited sex-specific differences in the development of hepatic steatosis. Methods We compared hepatic pathology in male and female SHROB rats. Additionally, we examined key biochemical and molecular parameters of signaling pathways linked with hyperinsulinemia and hyperlipidemia. Finally, using methods of quantitative polymerase chain reaction (qPCR) and western blot analysis, we quantified expression of 45 genes related to lipid biosynthesis and metabolism in the livers of male and female SHROB rats. Results We show that all SHROB rats developed hepatic steatosis that was accompanied by enhanced expression of SREBP1, SREBP2, ACC1, and FASN proteins. The livers of male rats also elicited higher induction of Pparg, Ppara, Slc2a4, Atox1, Skp1, Angptl3, and Pnpla3 mRNAs. In contrast, the livers of female SHROB rats elicited constitutively higher levels of phosphorylated JNK and AMPK and enhanced expression of Cd36. Conclusion Based on these data, we conclude that the severity of hepatic steatosis in male and female SHROB rats was mainly driven by increased de novo lipogenesis. Moreover, male and female SHROB rats also elicited differential severity of hepatic steatosis that was coupled with sex-specific differences in fatty acid transport and esterification. Electronic supplementary material The online version of this article (10.1186/s13293-018-0202-x) contains supplementary material, which is available to authorized users.
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Auger F, Martin F, Pétrault O, Samaillie J, Hennebelle T, Trabelsi MS, Bailleul F, Staels B, Bordet R, Duriez P. Risperidone-induced metabolic dysfunction is attenuated by Curcuma longa extract administration in mice. Metab Brain Dis 2018; 33:63-77. [PMID: 29034440 DOI: 10.1007/s11011-017-0133-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 10/09/2017] [Indexed: 12/12/2022]
Abstract
Antipsychotics, such as risperidone, increase food intake and induce alteration in glucose and lipid metabolism concomitantly with overweight and body fat increase, these biological abnormalities belong to the metabolic syndrome definition (high visceral adiposity, hypertriglyceridemia, hyperglycemia, low HDL-cholesterol and high blood pressure). Curcumin is a major component of traditional turmeric (Curcuma longa) which has been reported to improve lipid and glucose metabolism and to decrease weight in obese mice. We questioned the potential capacity of curcumin, contained in Curcuma longa extract (Biocurcuma™), to attenuate the risperidone-induced metabolic dysfunction. Two groups of mice were treated once a week, for 22 weeks, with intraperitoneal injection of risperidone (Risperdal) at a dose 12.5 mpk. Two other groups received intraperitoneal injection of the vehicle of Risperdal following the same schedule. Mice of one risperidone-treated groups and of one of vehicle-treated groups were fed a diet with 0.05% Biocurcuma™ (curcumin), while mice of the two other groups received the standard diet. Curcumin limited the capacity of risperidone to reduce spontaneous motricity, but failed to impede risperidone-induced increase in food intake. Curcumin did not reduce the capacity of risperidone to induce weight gain, but decreased visceral adiposity and decreased the risperidone-induced hepatomegaly, but not steatosis. Furthermore, curcumin repressed the capacity of risperidone to induce the hepatic over expression of enzymes involved in lipid metabolism (LXRα, FAS, ACC1, LPL, PPARγ, ACO, SREBP2) and decreased risperidone-induced glucose intolerance and hypertriglyceridemia. Curcumin decreased risperidone-induced increases in serum markers of hepatotoxicity (ALAT, ASAT), as well as of one major hepatic pro-inflammatory transcription factor (NFκB: p105 mRNA and p65 protein). These findings support that nutritional doses of curcumin contained in Curcuma longa extract are able to partially counteract the risperidone-induced metabolic dysfunction in mice, suggesting that curcumin ought to be tested to reduce the capacity of risperidone to induce the metabolic syndrome in human.
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Affiliation(s)
- Florent Auger
- Joint Service of Life's Imaging Platform, University of Lille, UDSL, Lille, France
- Inserm, CHU Lille, U1171 - Degenerative & Vascular Cognitive Disorders, University of Lille, F-59000, Lille, France
| | - Françoise Martin
- Faculty of Pharmacy, University of Lille, UDSL, Lille, France
- INSERM U 1011, University of Lille, UDSL, Lille, France
- Pasteur Institute, Lille, France
- European Genomic Institute for Diabetes (E.G.I.D.), 3508, Lille, FR, France
| | - Olivier Pétrault
- Inserm, CHU Lille, U1171 - Degenerative & Vascular Cognitive Disorders, University of Lille, F-59000, Lille, France
- Laboratory of Blood Brain Barrier Physiopathology, University of Artois, Lens, France
| | - Jennifer Samaillie
- Faculty of Pharmacy, University of Lille, UDSL, Lille, France
- Interdisciplinary Group of Research in Therapeutic Innovation and Optimization, 4481, Lille, EA, France
| | - Thierry Hennebelle
- Faculty of Pharmacy, University of Lille, UDSL, Lille, France
- Interdisciplinary Group of Research in Therapeutic Innovation and Optimization, 4481, Lille, EA, France
| | - Mohamed-Sami Trabelsi
- INSERM U 1011, University of Lille, UDSL, Lille, France
- Pasteur Institute, Lille, France
- European Genomic Institute for Diabetes (E.G.I.D.), 3508, Lille, FR, France
| | - François Bailleul
- Faculty of Pharmacy, University of Lille, UDSL, Lille, France
- Interdisciplinary Group of Research in Therapeutic Innovation and Optimization, 4481, Lille, EA, France
| | - Bart Staels
- Faculty of Pharmacy, University of Lille, UDSL, Lille, France
- INSERM U 1011, University of Lille, UDSL, Lille, France
- Pasteur Institute, Lille, France
- European Genomic Institute for Diabetes (E.G.I.D.), 3508, Lille, FR, France
| | - Régis Bordet
- Inserm, CHU Lille, U1171 - Degenerative & Vascular Cognitive Disorders, University of Lille, F-59000, Lille, France
| | - Patrick Duriez
- Inserm, CHU Lille, U1171 - Degenerative & Vascular Cognitive Disorders, University of Lille, F-59000, Lille, France.
- Faculty of Pharmacy, University of Lille, UDSL, Lille, France.
- Faculté de Pharmacie, Université de Lille, 3 rue du Pr. Laguesse, 59000, Lille, France.
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Natural modulators of nonalcoholic fatty liver disease: Mode of action analysis and in silico ADME-Tox prediction. Toxicol Appl Pharmacol 2017; 337:45-66. [DOI: 10.1016/j.taap.2017.10.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 02/06/2023]
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10
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Al Sharif M, Tsakovska I, Pajeva I, Alov P, Fioravanzo E, Bassan A, Kovarich S, Yang C, Mostrag-Szlichtyng A, Vitcheva V, Worth AP, Richarz AN, Cronin MT. The application of molecular modelling in the safety assessment of chemicals: A case study on ligand-dependent PPARγ dysregulation. Toxicology 2017; 392:140-154. [DOI: 10.1016/j.tox.2016.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 01/17/2016] [Accepted: 01/24/2016] [Indexed: 12/18/2022]
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Tabish AM, Poels K, Byun HM, luyts K, Baccarelli AA, Martens J, Kerkhofs S, Seys S, Hoet P, Godderis L. Changes in DNA Methylation in Mouse Lungs after a Single Intra-Tracheal Administration of Nanomaterials. PLoS One 2017; 12:e0169886. [PMID: 28081255 PMCID: PMC5231360 DOI: 10.1371/journal.pone.0169886] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 12/23/2016] [Indexed: 12/25/2022] Open
Abstract
Aims This study aimed to investigate the effects of nanomaterial (NM) exposure on DNA methylation. Methods and Results Intra-tracheal administration of NM: gold nanoparticles (AuNPs) of 5-, 60- and 250-nm diameter; single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) at high dose of 2.5 mg/kg and low dose of 0.25 mg/kg for 48 h to BALB/c mice. Study showed deregulations in immune pathways in NM-induced toxicity in vivo. NM administration had the following DNA methylation effects: AuNP 60 nm induced CpG hypermethylation in Atm, Cdk and Gsr genes and hypomethylation in Gpx; Gsr and Trp53 showed changes in methylation between low- and high-dose AuNP, 60 and 250 nm respectively, and AuNP had size effects on methylation for Trp53. Conclusion Epigenetics may be implicated in NM-induced disease pathways.
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Affiliation(s)
- Ali M. Tabish
- Centre for Environment and Health, KU Leuven, Leuven, Belgium
- Integrated Cardio Metabolic Centre, Huddinge, Sweden
- * E-mail:
| | - Katrien Poels
- Centre for Environment and Health, KU Leuven, Leuven, Belgium
| | - Hyang-Min Byun
- Laboratory of Environmental Epigenetics, Exposure Epidemiology and Risk Program, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Katrien luyts
- Centre for Environment and Health, KU Leuven, Leuven, Belgium
| | - Andrea A. Baccarelli
- Laboratory of Environmental Epigenetics, Exposure Epidemiology and Risk Program, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Johan Martens
- Centrum voor Oppervlaktechemie en Katalyse, KU Leuven, Leuven, Belgium
| | - Stef Kerkhofs
- Centrum voor Oppervlaktechemie en Katalyse, KU Leuven, Leuven, Belgium
| | - Sven Seys
- Laboratory of Clinical Immunology, KU Leuven, Belgium
| | - Peter Hoet
- Centre for Environment and Health, KU Leuven, Leuven, Belgium
| | - Lode Godderis
- Centre for Environment and Health, KU Leuven, Leuven, Belgium
- IDEWE, External Service for Prevention and Protection at work, Heverlee, Belgium
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Chikamoto K, Misu H, Takayama H, Kikuchi A, Ishii KA, Lan F, Takata N, Tajima-Shirasaki N, Takeshita Y, Tsugane H, Kaneko S, Matsugo S, Takamura T. Rapid response of the steatosis-sensing hepatokine LECT2 during diet-induced weight cycling in mice. Biochem Biophys Res Commun 2016; 478:1310-6. [DOI: 10.1016/j.bbrc.2016.08.117] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 08/20/2016] [Indexed: 10/21/2022]
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13
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Nuño-Lámbarri N, Barbero-Becerra VJ, Uribe M, Chávez-Tapia NC. Mitochondrial Molecular Pathophysiology of Nonalcoholic Fatty Liver Disease: A Proteomics Approach. Int J Mol Sci 2016; 17:281. [PMID: 26999105 PMCID: PMC4813145 DOI: 10.3390/ijms17030281] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/19/2016] [Accepted: 02/19/2016] [Indexed: 12/14/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a chronic liver condition that can progress to nonalcoholic steatohepatitis, cirrhosis and cancer. It is considered an emerging health problem due to malnourishment or a high-fat diet (HFD) intake, which is observed worldwide. It is well known that the hepatocytes’ apoptosis phenomenon is one of the most important features of NAFLD. Thus, this review focuses on revealing, through a proteomics approach, the complex network of protein interactions that promote fibrosis, liver cell stress, and apoptosis. According to different types of in vitro and murine models, it has been found that oxidative/nitrative protein stress leads to mitochondrial dysfunction, which plays a major role in stimulating NAFLD damage. Human studies have revealed the importance of novel biomarkers, such as retinol-binding protein 4, lumican, transgelin 2 and hemoglobin, which have a significant role in the disease. The post-genome era has brought proteomics technology, which allows the determination of molecular pathogenesis in NAFLD. This has led to the search for biomarkers which improve early diagnosis and optimal treatment and which may effectively prevent fatal consequences such as cirrhosis or cancer.
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Affiliation(s)
- Natalia Nuño-Lámbarri
- Traslational Research Unit, Médica Sur Clinic & Foundation, Mexico City 14050, Mexico.
| | | | - Misael Uribe
- Obesity and Digestive Diseases Unit, Médica Sur Clinic & Foundation, Mexico City 14050, Mexico.
| | - Norberto C Chávez-Tapia
- Traslational Research Unit, Médica Sur Clinic & Foundation, Mexico City 14050, Mexico.
- Obesity and Digestive Diseases Unit, Médica Sur Clinic & Foundation, Mexico City 14050, Mexico.
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Angrish MM, Kaiser JP, McQueen CA, Chorley BN. Tipping the Balance: Hepatotoxicity and the 4 Apical Key Events of Hepatic Steatosis. Toxicol Sci 2016; 150:261-8. [PMID: 26980302 DOI: 10.1093/toxsci/kfw018] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Hepatic steatosis is a condition were fat accumulates in the liver and it is associated with extra-hepatic diseases related to metabolic syndrome and systemic energy metabolism. If not reversed, steatosis can progress to steatohepatitis and irreversible stages of liver disease including fibrosis, cirrhosis, hepatocellular carcinoma, and death. From a public health standpoint, identifying chemical exposures that may be factors in steatosis etiology are important for preventing hepatotoxicity and liver disease progression. It is therefore important to identify the biological events that are key for steatosis pathology mediated by chemical exposure. In this review, we give a current overview of the complex biological cascades that can disrupt lipid homeostasis in hepatocytes in the context of 4 apical key events central to hepatic lipid retention: hepatic fatty acid (FA) uptake,de novoFA and lipid synthesis, FA oxidation, and lipid efflux. Our goal is to review these key cellular events and visually summarize them using a network for application in pathway-based toxicity testing. This effort provides a foundation to improve next-generation chemical screening efforts that may be used to prevent and ultimately reverse the growing incidence of fatty liver disease in our population.
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Affiliation(s)
- Michelle M Angrish
- *National Health and Environmental Effects Research Laboratory, Office of Research and Development (ORD), United States Environmental Protection Agency (US EPA), Research Triangle Park, North Carolina 27709
| | - Jonathan Phillip Kaiser
- United States Environmental Protection Agency (US EPA), National Center for Environmental Assessment, Office of Research and Development (ORD), Cincinnati, Ohio 45268
| | - Charlene A McQueen
- *National Health and Environmental Effects Research Laboratory, Office of Research and Development (ORD), United States Environmental Protection Agency (US EPA), Research Triangle Park, North Carolina 27709
| | - Brian N Chorley
- *National Health and Environmental Effects Research Laboratory, Office of Research and Development (ORD), United States Environmental Protection Agency (US EPA), Research Triangle Park, North Carolina 27709;
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15
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Barbosa AM, Francisco PDC, Motta K, Chagas TR, Dos Santos C, Rafacho A, Nunes EA. Fish oil supplementation attenuates changes in plasma lipids caused by dexamethasone treatment in rats. Appl Physiol Nutr Metab 2015; 41:382-90. [PMID: 26939043 DOI: 10.1139/apnm-2015-0487] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Dexamethasone is an anti-inflammatory glucocorticoid that may alter glucose and lipid homeostasis when administered in high doses or for long periods of time. Omega-3 fatty acids, present in fish oil (FO), can be used as potential modulators of intermediary glucose and lipid metabolism. Herein, we evaluate the effects of FO supplementation (1 g·kg(-1) body weight (BW)) on glucose and lipid metabolism in rats treated with dexamethasone (0.5 mg·kg(-1) BW) for 15 days. Adult male Wistar rats were distributed among 4 groups: control (saline, 1 mL·kg(-1) BW and mineral oil, 1 g·kg(-1) BW), DEX (dexamethasone and mineral oil), FO (fish oil and saline), and DFO (fish oil and dexamethasone). Dexamethasone and saline were administered intraperitoneally, and fish oil and mineral oil were administered by gavage. We evaluated functional and molecular parameters of lipid and glycemic profiles at 8 days and at the end of treatment. FO supplementation increased hepatic docosahexaenoic acid (DEX: 5.6% ± 0.7%; DFO: 10.5% ± 0.8%) and eicosapentaenoic acid (DEX: 0.3% ± 0.0%; DFO: 1.3% ± 0.1%) contents and attenuated the increase of plasma triacylglycerol, total cholesterol, and non-high-density lipoprotein cholesterol concentrations in DFO rats compared with DEX rats. These effects seem not to depend on hepatic expression of insulin receptor substrate 1, protein kinase B, peroxisome proliferator-activated receptor γ coactivator 1-α, and peroxisome proliferator-activated receptor γ. There was no effect of supplementation on body weight loss, fasting glycemia, and glucose tolerance in rats treated with dexamethasone. In conclusion, we show that FO supplementation for 15 days attenuates the dyslipidemia induced by dexamethasone treatment.
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Affiliation(s)
- Amanda Marreiro Barbosa
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil.,b Multicenter Graduate Program in Physiological Sciences, Graduate Program in Nutrition, Center of Health Sciences, UFSC, Florianópolis, Brazil
| | - Priscila de Cássia Francisco
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Katia Motta
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Thayz Rodrigues Chagas
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Cristiane Dos Santos
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Alex Rafacho
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Everson Araújo Nunes
- a Laboratory of Investigation in Chronic Diseases, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil.,b Multicenter Graduate Program in Physiological Sciences, Graduate Program in Nutrition, Center of Health Sciences, UFSC, Florianópolis, Brazil
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16
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Tsakovska I, Al Sharif M, Alov P, Diukendjieva A, Fioravanzo E, Cronin MTD, Pajeva I. Molecular modelling study of the PPARγ receptor in relation to the mode of action/adverse outcome pathway framework for liver steatosis. Int J Mol Sci 2014; 15:7651-66. [PMID: 24857909 PMCID: PMC4057697 DOI: 10.3390/ijms15057651] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 04/18/2014] [Accepted: 04/21/2014] [Indexed: 12/14/2022] Open
Abstract
The comprehensive understanding of the precise mode of action and/or adverse outcome pathway (MoA/AOP) of chemicals has become a key step toward the development of a new generation of predictive toxicology tools. One of the challenges of this process is to test the feasibility of the molecular modelling approaches to explore key molecular initiating events (MIE) within the integrated strategy of MoA/AOP characterisation. The description of MoAs leading to toxicity and liver damage has been the focus of much interest. Growing evidence underlines liver PPARγ ligand-dependent activation as a key MIE in the elicitation of liver steatosis. Synthetic PPARγ full agonists are of special concern, since they may trigger a number of adverse effects not observed with partial agonists. In this study, molecular modelling was performed based on the PPARγ complexes with full agonists extracted from the Protein Data Bank. The receptor binding pocket was analysed, and the specific ligand-receptor interactions were identified for the most active ligands. A pharmacophore model was derived, and the most important pharmacophore features were outlined and characterised in relation to their specific role for PPARγ activation. The results are useful for the characterisation of the chemical space of PPARγ full agonists and could facilitate the development of preliminary filtering rules for the effective virtual ligand screening of compounds with PPARγ full agonistic activity.
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Affiliation(s)
- Ivanka Tsakovska
- Institute of Biophysics and Biomedical Engineering-BAS, Acad. G. Bonchev Str., Bl.105, Sofia 1113, Bulgaria.
| | - Merilin Al Sharif
- Institute of Biophysics and Biomedical Engineering-BAS, Acad. G. Bonchev Str., Bl.105, Sofia 1113, Bulgaria.
| | - Petko Alov
- Institute of Biophysics and Biomedical Engineering-BAS, Acad. G. Bonchev Str., Bl.105, Sofia 1113, Bulgaria.
| | - Antonia Diukendjieva
- Institute of Biophysics and Biomedical Engineering-BAS, Acad. G. Bonchev Str., Bl.105, Sofia 1113, Bulgaria.
| | - Elena Fioravanzo
- Soluzioni Informatiche srl, Via Ferrari 14, Vicenza 36100, Italy.
| | - Mark T D Cronin
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK.
| | - Ilza Pajeva
- Institute of Biophysics and Biomedical Engineering-BAS, Acad. G. Bonchev Str., Bl.105, Sofia 1113, Bulgaria.
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