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Haaker MW, Vaandrager AB, Helms JB. Retinoids in health and disease: A role for hepatic stellate cells in affecting retinoid levels. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158674. [PMID: 32105672 DOI: 10.1016/j.bbalip.2020.158674] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 12/13/2022]
Abstract
Vitamin A (retinol) is important for normal growth, vision and reproduction. It has a role in the immune response and the development of metabolic syndrome. Most of the retinol present in the body is stored as retinyl esters within lipid droplets in hepatic stellate cells (HSCs). In case of liver damage, HSCs release large amounts of stored retinol, which is partially converted to retinoic acid (RA). This surge of RA can mediate the immune response and enhance the regeneration of the liver. If the damage persists activated HSCs change into myofibroblast-like cells producing extracellular matrix, which increases the chance of tumorigenesis to occur. RA has been shown to decrease proliferation and metastasis of hepatocellular carcinoma. The levels of RA and RA signaling are influenced by the possibility to esterify retinol towards retinyl esters. This suggests a complex regulation between different retinoids, with an important regulatory role for HSCs.
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Affiliation(s)
- Maya W Haaker
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Arie B Vaandrager
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - J Bernd Helms
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
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Sirbu IO, Chiş AR, Moise AR. Role of carotenoids and retinoids during heart development. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158636. [PMID: 31978553 DOI: 10.1016/j.bbalip.2020.158636] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 02/08/2023]
Abstract
The nutritional requirements of the developing embryo are complex. In the case of dietary vitamin A (retinol, retinyl esters and provitamin A carotenoids), maternal derived nutrients serve as precursors to signaling molecules such as retinoic acid, which is required for embryonic patterning and organogenesis. Despite variations in the composition and levels of maternal vitamin A, embryonic tissues need to generate a precise amount of retinoic acid to avoid congenital malformations. Here, we summarize recent findings regarding the role and metabolism of vitamin A during heart development and we survey the association of genes known to affect retinoid metabolism or signaling with various inherited disorders. A better understanding of the roles of vitamin A in the heart and of the factors that affect retinoid metabolism and signaling can help design strategies to meet nutritional needs and to prevent birth defects and disorders associated with altered retinoid metabolism. This article is part of a Special Issue entitled Carotenoids recent advances in cell and molecular biology edited by Johannes von Lintig and Loredana Quadro.
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Affiliation(s)
- Ioan Ovidiu Sirbu
- Biochemistry Department, Victor Babes University of Medicine and Pharmacy, Eftimie Murgu Nr. 2, 300041 Timisoara, Romania; Timisoara Institute of Complex Systems, V. Lucaciu 18, 300044 Timisoara, Romania.
| | - Aimée Rodica Chiş
- Biochemistry Department, Victor Babes University of Medicine and Pharmacy, Eftimie Murgu Nr. 2, 300041 Timisoara, Romania
| | - Alexander Radu Moise
- Medical Sciences Division, Northern Ontario School of Medicine, Sudbury, ON P3E 2C6, Canada; Department of Chemistry and Biochemistry, Biology and Biomolecular Sciences Program, Laurentian University, Sudbury, ON P3E 2C6, Canada.
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53
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Miller AP, Coronel J, Amengual J. The role of β-carotene and vitamin A in atherogenesis: Evidences from preclinical and clinical studies. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158635. [PMID: 31978554 DOI: 10.1016/j.bbalip.2020.158635] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 02/07/2023]
Abstract
Atherosclerotic cardiovascular disease (ASCVD) is the principal contributor to myocardial infarction, the leading cause of death worldwide. Epidemiological and mechanistic studies indicate that β-carotene and its vitamin A derivatives stimulate lipid catabolism in several tissues to reduce the incidence of obesity, but their roles within ASCVD are elusive. Herein, we review the mechanisms by which β-carotene and vitamin A modulate ASCVD. First, we summarize the current knowledge linking these nutrients with epidemiological studies and lipoprotein metabolism as one of the initiating factors of ASCVD. Next, we focus on different aspects of vitamin A metabolism in immune cells such as the mechanisms of carotenoid uptake and conversion to the vitamin A metabolite, retinoic acid. Lastly, we review the effects of retinoic acid on immuno-metabolism, differentiation, and function of macrophages and T cells, the two pillars of the innate and adaptive immune response in ASCVD, respectively. This article is part of a Special Issue entitled Carotenoids recent advances in cell and molecular biology edited by Johannes von Lintig and Loredana Quadro.
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Affiliation(s)
- Anthony P Miller
- Department of Food Science and Human Nutrition, University of Illinois Urbana Champaign, Urbana, IL 61801, United States of America
| | - Johana Coronel
- Department of Food Science and Human Nutrition, University of Illinois Urbana Champaign, Urbana, IL 61801, United States of America
| | - Jaume Amengual
- Department of Food Science and Human Nutrition, University of Illinois Urbana Champaign, Urbana, IL 61801, United States of America; Division of Nutritional Sciences, University of Illinois Urbana Champaign, Urbana, IL 61801, United States of America.
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55
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Czimmerer Z, Halasz L, Nagy L. Unorthodox Transcriptional Mechanisms of Lipid-Sensing Nuclear Receptors in Macrophages: Are We Opening a New Chapter? Front Endocrinol (Lausanne) 2020; 11:609099. [PMID: 33362723 PMCID: PMC7758493 DOI: 10.3389/fendo.2020.609099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 11/11/2020] [Indexed: 12/25/2022] Open
Abstract
Work over the past 30 years has shown that lipid-activated nuclear receptors form a bridge between metabolism and immunity integrating metabolic and inflammatory signaling in innate immune cells. Ligand-induced direct transcriptional activation and protein-protein interaction-based transrepression were identified as the most common mechanisms of liganded-nuclear receptor-mediated transcriptional regulation. However, the integration of different next-generation sequencing-based methodologies including chromatin immunoprecipitation followed by sequencing and global run-on sequencing allowed to investigate the DNA binding and ligand responsiveness of nuclear receptors at the whole-genome level. Surprisingly, these studies have raised the notion that a major portion of lipid-sensing nuclear receptor cistromes are not necessarily responsive to ligand activation. Although the biological role of the ligand insensitive portion of nuclear receptor cistromes is largely unknown, recent findings indicate that they may play roles in the organization of chromatin structure, in the regulation of transcriptional memory, and the epigenomic modification of responsiveness to other microenvironmental signals in macrophages. In this review, we will provide an overview and discuss recent advances of our understanding of lipid-activated nuclear receptor-mediated non-classical or unorthodox actions in macrophages.
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Affiliation(s)
- Zsolt Czimmerer
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Laszlo Halasz
- Departments of Medicine and Biological Chemistry, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children’s Hospital, St. Petersburg, FL, United States
| | - Laszlo Nagy
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- Departments of Medicine and Biological Chemistry, Johns Hopkins University School of Medicine, Institute for Fundamental Biomedical Research, Johns Hopkins All Children’s Hospital, St. Petersburg, FL, United States
- *Correspondence: Laszlo Nagy,
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56
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Combined treatment with 9-cis β-carotene and 22R-hydroxycholesterol augments cholesterol efflux in macrophages. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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57
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Carotenoid metabolism at the intestinal barrier. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1865:158580. [PMID: 31794861 DOI: 10.1016/j.bbalip.2019.158580] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 12/17/2022]
Abstract
Carotenoids exert a rich variety of physiological functions in mammals and are beneficial for human health. These lipids are acquired from the diet and metabolized to apocarotenoids, including retinoids (vitamin A and its metabolites). The small intestine is a major site for their absorption and bioconversion. From here, carotenoids and their metabolites are distributed within the body in triacylglycerol-rich lipoproteins to support retinoid signaling in peripheral tissues and photoreceptor function in the eyes. In recent years, much progress has been made in identifying carotenoid metabolizing enzymes, transporters, and binding proteins. A diet-responsive regulatory network controls the activity of these components and adapts carotenoid absorption and bioconversion to the bodily requirements of these lipids. Genetic variability in the genes encoding these components alters carotenoid homeostasis and is associated with pathologies. We here summarize the advanced state of knowledge about intestinal carotenoid metabolism and its impact on carotenoid and retinoid homeostasis of other organ systems, including the eyes, liver, and immune system. The implication of the findings for science-based intake recommendations for these essential dietary lipids is discussed. This article is part of a Special Issue entitled Carotenoids recent advances in cell and molecular biology edited by Johannes von Lintig and Loredana Quadro.
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58
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Retinoic Acid and Germ Cell Development in the Ovary and Testis. Biomolecules 2019; 9:biom9120775. [PMID: 31771306 PMCID: PMC6995559 DOI: 10.3390/biom9120775] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/22/2019] [Accepted: 11/23/2019] [Indexed: 02/07/2023] Open
Abstract
Retinoic acid (RA), a derivative of vitamin A, is critical for the production of oocytes and sperm in mammals. These gametes derive from primordial germ cells, which colonize the nascent gonad, and later undertake sexual differentiation to produce oocytes or sperm. During fetal development, germ cells in the ovary initiate meiosis in response to RA, whereas those in the testis do not yet initiate meiosis, as they are insulated from RA, and undergo cell cycle arrest. After birth, male germ cells resume proliferation and undergo a transition to spermatogonia, which are destined to develop into haploid spermatozoa via spermatogenesis. Recent findings indicate that RA levels change periodically in adult testes to direct not only meiotic initiation, but also other key developmental transitions to ensure that spermatogenesis is precisely organized for the prodigious output of sperm. This review focuses on how female and male germ cells develop in the ovary and testis, respectively, and the role of RA in this process.
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59
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Weiss-Hersh K, Garcia AL, Marosvölgyi T, Szklenár M, Decsi T, Rühl R. Saturated and monounsaturated fatty acids in membranes are determined by the gene expression of their metabolizing enzymes SCD1 and ELOVL6 regulated by the intake of dietary fat. Eur J Nutr 2019; 59:2759-2769. [PMID: 31676951 PMCID: PMC7413877 DOI: 10.1007/s00394-019-02121-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/16/2019] [Indexed: 12/12/2022]
Abstract
PURPOSE We investigated the effect of dietary fats on the incorporation of saturated (SAFAs) and monounsaturated dietary fatty acids (MUFAs) into plasma phospholipids and the regulation of the expression of lipid-metabolizing enzymes in the liver. METHODS Mice were fed different diets containing commonly used dietary fats/oils (coconut fat, margarine, fish oil, sunflower oil, or olive oil) for 4 weeks (n = 6 per diet group). In a second experiment, mice (n = 6 per group) were treated for 7 days with synthetic ligands to activate specific nuclear hormone receptors (NHRs) and the hepatic gene expression of CYP26A1 was investigated. Hepatic gene expression of stearoyl-coenzyme A desaturase 1 (SCD1), elongase 6 (ELOVL6), and CYP26A1 was examined using quantitative real-time PCR (QRT-PCR). Fatty acid composition in mouse plasma phospholipids was analyzed by gas chromatography (GC). RESULTS We found significantly reduced hepatic gene expression of SCD1 and ELOVL6 after the fish oil diet compared with the other diets. This resulted in reduced enzyme-specific fatty acid ratios, e.g., 18:1n9/18:0 for SCD1 and 18:0/16:0 and 18:1n7/16:1n7 for ELOVL6 in plasma phospholipids. Furthermore, CYP26A1 a retinoic acid receptor-specific target was revealed as a new player mediating the suppressive effect of fish oil-supplemented diet on SCD1 and ELOVL6 hepatic gene expression. CONCLUSION Plasma levels of MUFAs and SAFAs strongly reflect an altered hepatic fatty acid-metabolizing enzyme expression after supplementation with different dietary fats/oils.
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Affiliation(s)
- Kathrin Weiss-Hersh
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Ada L Garcia
- Human Nutrition, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
| | | | | | - Tamás Decsi
- Department of Paediatrics, University of Pécs, Pécs, Hungary
| | - Ralph Rühl
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary.,Paprika Bioanalytics BT, Debrecen, Hungary
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60
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Rühl R, Krezel W, de Lera AR. 9-Cis-13,14-dihydroretinoic acid, a new endogenous mammalian ligand of retinoid X receptor and the active ligand of a potential new vitamin A category: vitamin A5. Nutr Rev 2019; 76:929-941. [PMID: 30358857 DOI: 10.1093/nutrit/nuy057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The identity of the endogenous RXR ligand has not been conclusively determined, even though several compounds of natural origin, including retinoids and fatty acids, have been postulated to fulfill this role. Filling this gap, 9-cis-13,14-dihydroretinoic acid (9CDHRA) was identified as an endogenous RXR ligand in mice. This review examines the physiological relevance of various potential endogenous RXR ligands, especially 9CDHRA. The elusive steps in the metabolic synthesis of 9CDHRA, as well as the nutritional/nutrimetabolic origin of 9CDHRA, are also explored, along with the suitability of the ligand to be the representative member of a novel vitamin A class (vitamin A5).
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Affiliation(s)
- Ralph Rühl
- Paprika Bioanalytics BT, Debrecen, Hungary
| | - Wojciech Krezel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Inserm, Centre National Recherche Scientifique (CNRS), Université de Strasbourg, Illkirch, France.,Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Strasbourg, France
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultad de Química, Centro De Investigaciones Biomédicasand Instituto de Investigación Biomédica de Vigo, Universidade de Vigo, Campus Lagoas-Marcosende, Vigo, Spain
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61
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Yamada S, Kawasaki M, Fujihara M, Watanabe M, Takamura Y, Takioku M, Nishioka H, Takeuchi Y, Makishima M, Motoyama T, Ito S, Tokiwa H, Nakano S, Kakuta H. Competitive Binding Assay with an Umbelliferone-Based Fluorescent Rexinoid for Retinoid X Receptor Ligand Screening. J Med Chem 2019; 62:8809-8818. [PMID: 31483660 DOI: 10.1021/acs.jmedchem.9b00995] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Ligands for retinoid X receptors (RXRs), "rexinoids", are attracting interest as candidates for therapy of type 2 diabetes and Alzheimer's and Parkinson's diseases. However, current screening methods for rexinoids are slow and require special apparatus or facilities. Here, we created 7-hydroxy-2-oxo-6-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)-2H-chromene-3-carboxylic acid (10, CU-6PMN) as a new fluorescent RXR agonist and developed a screening system of rexinoids using 10. Compound 10 was designed based on the fact that umbelliferone emits strong fluorescence in a hydrophilic environment, but the fluorescence intensity decreases in hydrophobic environments such as the interior of proteins. The developed assay using 10 enabled screening of rexinoids to be performed easily within a few hours by monitoring changes of fluorescence intensity with widely available fluorescence microplate readers, without the need for processes such as filtration.
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Affiliation(s)
- Shoya Yamada
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan.,Research Fellowship Division , Japan Society for the Promotion of Science , Sumitomo-Ichibancho FS Bldg., 8 Ichibancho , Chiyoda-ku, Tokyo 102-8472 , Japan
| | - Mayu Kawasaki
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences , University of Shizuoka , 52-1 Yada , Suruga-ku, Shizuoka 422-8526 , Japan
| | - Michiko Fujihara
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan.,AIBIOS Co. Ltd. , Tri-Seven Roppongi 8F 7-7-7 Roppongi , Minato-ku, Tokyo 106-0032 Japan
| | - Masaki Watanabe
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Yuta Takamura
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Maho Takioku
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Hiromi Nishioka
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Yasuo Takeuchi
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
| | - Makoto Makishima
- Division of Biochemistry, Department of Biomedical Sciences , Nihon University School of Medicine , 30-1 Oyaguchi-kamicho , Itabashi-ku, Tokyo 173-8610 , Japan
| | - Tomoharu Motoyama
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences , University of Shizuoka , 52-1 Yada , Suruga-ku, Shizuoka 422-8526 , Japan
| | - Sohei Ito
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences , University of Shizuoka , 52-1 Yada , Suruga-ku, Shizuoka 422-8526 , Japan
| | | | - Shogo Nakano
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences , University of Shizuoka , 52-1 Yada , Suruga-ku, Shizuoka 422-8526 , Japan
| | - Hiroki Kakuta
- Division of Pharmaceutical Sciences , Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , 1-1-1, Tsushima-naka , Kita-ku, Okayama 700-8530 , Japan
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62
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Apo-14´-Carotenoic Acid Is a Novel Endogenous and Bioactive Apo-Carotenoid. Nutrients 2019; 11:nu11092084. [PMID: 31487780 PMCID: PMC6770688 DOI: 10.3390/nu11092084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/20/2019] [Accepted: 08/26/2019] [Indexed: 12/03/2022] Open
Abstract
Carotenoids can be metabolized to various apo-carotenoids and retinoids. Apo-15´-carotenoic acid (retinoic acid, RA) is a potent activator of the retinoic acid receptor (RAR) in its all-trans- (ATRA) and 9-cis- (9CRA) forms. In this study we show firstly, that apo-14´-carotenoic acid (A14CA), besides retinoic acids, is present endogenously and with increased levels in the human organism after carrot juice supplementation rich in β-carotene. All-trans-A14C (ATA14CA) is just a moderate activator of RAR-transactivation in reporter cell lines but can potently activate retinoic acid response element (RARE)-mediated signalling in DR5/RARE-reporter mice and potently increase retinoid-reporter target gene expression in ATA14CA-supplemented mice and treated MM6 cells. Further metabolism to all-trans-13,14-dihydroretinoic acid (ATDHRA) may be the key for its potent effects on retinoid target gene activation in ATA14CA-treated MM6 cells and in liver of supplemented mice. We conclude that besides RAs, there are alternative ways to activate RAR-response pathways in the mammalian organism. ATA14CA alone and in combination with its metabolite ATDHRA may be an alternative pathway for potent RAR-mediated signalling.
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63
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Fitz NF, Nam KN, Koldamova R, Lefterov I. Therapeutic targeting of nuclear receptors, liver X and retinoid X receptors, for Alzheimer's disease. Br J Pharmacol 2019; 176:3599-3610. [PMID: 30924124 PMCID: PMC6715597 DOI: 10.1111/bph.14668] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/15/2019] [Accepted: 02/24/2019] [Indexed: 12/18/2022] Open
Abstract
After 15 years of research into Alzheimer's disease (AD) therapeutics, including billions of US dollars provided by federal agencies, pharmaceutical companies, and private foundations, there are still no meaningful therapies that can delay the onset or slow the progression of AD. An understanding of the proteolytic processing of amyloid precursor protein (APP) and the hypothesis that pathogenic mechanisms in familial and sporadic forms of AD are very similar led to the assumption that pharmacological inhibition of secretases or immunological approaches to clear amyloid depositions in the brain would have been the core to drug discovery strategies and successful therapies. However, there are other understudied approaches including targeting genes, gene networks, and metabolic pathways outside the proteolytic processing of APP. The advancement of newly developed sequencing technologies and mass spectrometry, as well as the availability of animal models expressing human apolipoprotein E isoforms, has been critical in rationalizing additional AD therapeutics. The purpose of this review is to present one of those approaches, based on the role of ligand-activated nuclear liver X and retinoid X receptors in the brain. This therapeutic approach was initially proposed utilizing in vitro models 15 years ago and has since been examined in numerous studies using AD-like mouse models. LINKED ARTICLES: This article is part of a themed section on Therapeutics for Dementia and Alzheimer's Disease: New Directions for Precision Medicine. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.18/issuetoc.
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Affiliation(s)
- Nicholas F Fitz
- Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Kyong Nyon Nam
- Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Radosveta Koldamova
- Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Iliya Lefterov
- Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
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64
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Rivas A, Alvarez R, de Lera AR. Stereocontrolled synthesis and configurational assignment of (R)-all-trans-11,12-dihydro-3-hydroxyretinol. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.150972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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65
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Krężel W, Rühl R, de Lera AR. Alternative retinoid X receptor (RXR) ligands. Mol Cell Endocrinol 2019; 491:110436. [PMID: 31026478 DOI: 10.1016/j.mce.2019.04.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/06/2019] [Accepted: 04/22/2019] [Indexed: 12/15/2022]
Abstract
Retinoid X receptors (RXRs) control a wide variety of functions by virtue of their dimerization with other nuclear hormone receptors (NRs), contributing thereby to activities of different signaling pathways. We review known RXR ligands as transcriptional modulators of specific RXR-dimers and the associated biological processes. We also discuss the physiological relevance of such ligands, which remains frequently a matter of debate and which at present is best met by member(s) of a novel family of retinoids, postulated as Vitamin A5. Through comparison with other natural, but also with synthetic ligands, we discuss high diversity in the modes of ligand binding to RXRs resulting in agonistic or antagonistic profiles and selectivity towards specific subtypes of permissive heterodimers. Despite such diversity, direct ligand binding to the ligand binding pocket resulting in agonistic activity was preferentially preserved in the course of animal evolution pointing to its functional relevance, and potential for existence of other, species-specific endogenous RXR ligands sharing the same mode of function.
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Affiliation(s)
- Wojciech Krężel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Centre National de la Recherche Scientifique, UMR 7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U 1258, Illkirch, France; Université de Strasbourg, Illkirch, France.
| | - Ralph Rühl
- Paprika Bioanalytics BT, Debrecen, Hungary
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultade de Química, Lagoas-Marcosende, 36310, Vigo, Spain
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66
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Abstract
Much evidence has accumulated in the literature over the last fifteen years that indicates vitamin A has a role in metabolic disease prevention and causation. This literature proposes that vitamin A can affect obesity development and the development of obesity-related diseases including insulin resistance, type 2 diabetes, hepatic steatosis and steatohepatitis, and cardiovascular disease. Retinoic acid, the transcriptionally active form of vitamin A, accounts for many of the reported associations. However, a number of proteins involved in vitamin A metabolism, including retinol-binding protein 4 (RBP4) and aldehyde dehydrogenase 1A1 (ALDH1A1, alternatively known as retinaldehyde dehydrogenase 1 or RALDH1), have also been identified as being associated with metabolic disease. Some of the reported effects of these vitamin A-related proteins are proposed to be independent of their roles in assuring normal retinoic acid homeostasis. This review will consider both human observational data as well as published data from molecular studies undertaken in rodent models and in cells in culture. The primary focus of the review will be on the effects that vitamin A per se and proteins involved in vitamin A metabolism have on adipocytes, adipose tissue biology, and adipose-related disease, as well as on early stage liver disease, including non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH).
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Affiliation(s)
- William S Blaner
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032.
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67
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β-Carotene in the human body: metabolic bioactivation pathways - from digestion to tissue distribution and excretion. Proc Nutr Soc 2019; 78:68-87. [PMID: 30747092 DOI: 10.1017/s0029665118002641] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
β-Carotene intake and tissue/blood concentrations have been associated with reduced incidence of several chronic diseases. Further bioactive carotenoid-metabolites can modulate the expression of specific genes mainly via the nuclear hormone receptors: retinoic acid receptor- and retinoid X receptor-mediated signalling. To better understand the metabolic conversion of β-carotene, inter-individual differences regarding β-carotene bioavailability and bioactivity are key steps that determine its further metabolism and bioactivation and mediated signalling. Major carotenoid metabolites, the retinoids, can be stored as esters or further oxidised and excreted via phase 2 metabolism pathways. In this review, we aim to highlight the major critical control points that determine the fate of β-carotene in the human body, with a special emphasis on β-carotene oxygenase 1. The hypothesis that higher dietary β-carotene intake and serum level results in higher β-carotene-mediated signalling is partly questioned. Alternative autoregulatory mechanisms in β-carotene / retinoid-mediated signalling are highlighted to better predict and optimise nutritional strategies involving β-carotene-related health beneficial mediated effects.
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68
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Coronel J, Pinos I, Amengual J. β-carotene in Obesity Research: Technical Considerations and Current Status of the Field. Nutrients 2019; 11:nu11040842. [PMID: 31013923 PMCID: PMC6521044 DOI: 10.3390/nu11040842] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 04/02/2019] [Accepted: 04/06/2019] [Indexed: 12/21/2022] Open
Abstract
Over the past decades, obesity has become a rising health problem as the accessibility to high calorie, low nutritional value food has increased. Research shows that some bioactive components in fruits and vegetables, such as carotenoids, could contribute to the prevention and treatment of obesity. Some of these carotenoids are responsible for vitamin A production, a hormone-like vitamin with pleiotropic effects in mammals. Among these effects, vitamin A is a potent regulator of adipose tissue development, and is therefore important for obesity. This review focuses on the role of the provitamin A carotenoid β-carotene in human health, emphasizing the mechanisms by which this compound and its derivatives regulate adipocyte biology. It also discusses the physiological relevance of carotenoid accumulation, the implication of the carotenoid-cleaving enzymes, and the technical difficulties and considerations researchers must take when working with these bioactive molecules. Thanks to the broad spectrum of functions carotenoids have in modern nutrition and health, it is necessary to understand their benefits regarding to metabolic diseases such as obesity in order to evaluate their applicability to the medical and pharmaceutical fields.
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Affiliation(s)
- Johana Coronel
- Department of Food Sciences and Human Nutrition, University of Illinois Urbana Champaign, Urbana, IL 61801, USA.
| | - Ivan Pinos
- Division of Nutritional Sciences, University of Illinois Urbana Champaign, Urbana, IL 61801, USA.
| | - Jaume Amengual
- Department of Food Sciences and Human Nutrition, University of Illinois Urbana Champaign, Urbana, IL 61801, USA.
- Division of Nutritional Sciences, University of Illinois Urbana Champaign, Urbana, IL 61801, USA.
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69
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de Almeida NR, Conda-Sheridan M. A review of the molecular design and biological activities of RXR agonists. Med Res Rev 2019; 39:1372-1397. [PMID: 30941786 DOI: 10.1002/med.21578] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 03/09/2019] [Accepted: 03/16/2019] [Indexed: 12/13/2022]
Abstract
An attractive approach to combat disease is to target theregulation of cell function. At the heart of this task are nuclear receptors (NRs); which control functions such as gene transcription. Arguably, the key player in this regulatory machinery is the retinoid X receptor (RXR). This NR associates with a third of the NRs found in humans. Scientists have hypothesized that controlling the activity of RXR is an attractive approach to control cellular functions that modulate diseases such as cancer, diabetes, Alzheimer's disease and Parkinson's disease. In this review, we will describe the key features of the RXR, present a historic perspective of the first RXR agonists, and discuss various templates that have been reported to activate RXR with a focus on their molecular structure, biological activity, and limitations. Finally, we will present an outlook of the field and future directions and considerations to synthesize or modulate RXR agonists to make these compounds a clinical reality.
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Affiliation(s)
| | - Martin Conda-Sheridan
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska
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70
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Osz J, McEwen AG, Wolf J, Poussin-Courmontagne P, Peluso-Iltis C, Chebaro Y, Kieffer B, Rochel N. Modulation of RXR-DNA complex assembly by DNA context. Mol Cell Endocrinol 2019; 481:44-52. [PMID: 30476562 DOI: 10.1016/j.mce.2018.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/15/2018] [Accepted: 11/22/2018] [Indexed: 01/16/2023]
Abstract
Retinoid X Receptors (RXRs) act as dimer partners for several nuclear receptors including itself, binding to genomic DNA response elements and regulating gene transcription with cell and gene specificity. As homodimers, RXRs bind direct repeats of the half-site (A/G)G(G/T)TCA separated by 1 nucleotide (DR1) and little variability of this consensus site is observed for natural DR1s. However, these variations are responsible of the modulation of RXR receptors function through differential binding affinity and conformational changes. To further our understanding of the molecular mechanisms underlying RXR-DNA interactions, we examined how RXR DBDs bind to different DR1s using thermodynamics, X-ray crystallography and nuclear magnetic resonance (NMR) spectroscopy. We show that the half-site sequences modulate the binding cooperativity that results from the protein-protein contacts between the two DBDs. Chemical shifts perturbation NMR experiments revealed that sequence variations in half-sites induce changes that propagate from the protein-DNA interface to the dimerization interface throughout the DBD fold.
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Affiliation(s)
- Judit Osz
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France
| | - Alastair G McEwen
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France
| | - Justine Wolf
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France
| | - Pierre Poussin-Courmontagne
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France
| | - Carole Peluso-Iltis
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France
| | - Yassmine Chebaro
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France
| | - Bruno Kieffer
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France.
| | - Natacha Rochel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM), U1258/Centre National de la Recherche Scientifique (CNRS), UMR7104/Université de Strasbourg, 67404, Illkirch, France.
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71
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Abstract
Retinoid X receptors (RXRs) are promiscuous partners of heterodimeric associations with other members of the Nuclear Receptor (NR) superfamily. RXR ligands ("rexinoids") either transcriptionally activate the "permissive" subclass of heterodimers or synergize with partner ligands in the "nonpermissive" subclass of heterodimers. The rationale for rexinoid design with a wide structural diversity going from the structures of existing complexes with RXR determined by X-Ray, to natural products and other ligands discovered by high-throughput screening (HTS), mere serendipity, and rationally designed based on Molecular Modeling, will be described. Included is the new generation of ligands that modulate the structure of specific receptor surfaces that serve to communicate with other regulators. The panel of the known RXR agonists, partial (ant)agonists, and/or heterodimer-selective rexinoids require the exploration of their therapeutic potential in order to overcome some of the current limitations of rexinoids in therapy.
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Affiliation(s)
- Claudio Martínez
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IBIV, Universidade de Vigo, Vigo, Spain
| | - José A Souto
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IBIV, Universidade de Vigo, Vigo, Spain
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IBIV, Universidade de Vigo, Vigo, Spain.
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72
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Matsuoka S, Bariuan JV, Nakagiri S, Abd Eldaim MA, Okamatsu-Ogura Y, Kimura K. Linking pathways and processes: Retinoic acid and glucose. MOLECULAR NUTRITION: CARBOHYDRATES 2019:247-264. [DOI: 10.1016/b978-0-12-849886-6.00013-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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73
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Reitzel AM, Macrander J, Mane-Padros D, Fang B, Sladek FM, Tarrant AM. Conservation of DNA and ligand binding properties of retinoid X receptor from the placozoan Trichoplax adhaerens to human. J Steroid Biochem Mol Biol 2018; 184:3-10. [PMID: 29510228 PMCID: PMC6120813 DOI: 10.1016/j.jsbmb.2018.02.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 02/19/2018] [Indexed: 12/13/2022]
Abstract
Nuclear receptors are a superfamily of transcription factors restricted to animals. These transcription factors regulate a wide variety of genes with diverse roles in cellular homeostasis, development, and physiology. The origin and specificity of ligand binding within lineages of nuclear receptors (e.g., subfamilies) continues to be a focus of investigation geared toward understanding how the functions of these proteins were shaped over evolutionary history. Among early-diverging animal lineages, the retinoid X receptor (RXR) is first detected in the placozoan, Trichoplax adhaerens. To gain insight into RXR evolution, we characterized ligand- and DNA-binding activity of the RXR from T. adhaerens (TaRXR). Like bilaterian RXRs, TaRXR specifically bound 9-cis-retinoic acid, which is consistent with a recently published result and supports a conclusion that the ancestral RXR bound ligand. DNA binding site specificity of TaRXR was determined through protein binding microarrays (PBMs) and compared with human RXRɑ. The binding sites for these two RXR proteins were broadly conserved (∼85% shared high-affinity sequences within a targeted array), suggesting evolutionary constraint for the regulation of downstream genes. We searched for predicted binding motifs of the T. adhaerens genome within 1000 bases of annotated genes to identify potential regulatory targets. We identified 648 unique protein coding regions with predicted TaRXR binding sites that had diverse predicted functions, with enriched processes related to intracellular signal transduction and protein transport. Together, our data support hypotheses that the original RXR protein in animals bound a ligand with structural similarity to 9-cis-retinoic acid; the DNA motif recognized by RXR has changed little in more than 1 billion years of evolution; and the suite of processes regulated by this transcription factor diversified early in animal evolution.
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Affiliation(s)
- Adam M Reitzel
- Department of Biological Sciences, University of North Carolina, Charlotte, Charlotte, NC 28223 USA
| | - Jason Macrander
- Department of Biological Sciences, University of North Carolina, Charlotte, Charlotte, NC 28223 USA
| | - Daniel Mane-Padros
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, CA 95251, USA
| | - Bin Fang
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, CA 95251, USA
| | - Frances M Sladek
- Department of Cell Biology and Neuroscience, University of California, Riverside, Riverside, CA 95251, USA
| | - Ann M Tarrant
- Biology Department, Woods Hole Oceanographic Institution, 45 Water Street, Mailstop 33, Woods Hole, MA 02543 USA.
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74
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Lucas R, Mihály J, Lowe GM, Graham DL, Szklenar M, Szegedi A, Töröcsik D, Rühl R. Reduced Carotenoid and Retinoid Concentrations and Altered Lycopene Isomer Ratio in Plasma of Atopic Dermatitis Patients. Nutrients 2018; 10:E1390. [PMID: 30275368 PMCID: PMC6213761 DOI: 10.3390/nu10101390] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/11/2018] [Accepted: 09/22/2018] [Indexed: 01/04/2023] Open
Abstract
Carotenoids and retinoids are known to alter the allergic response with important physiological roles in the skin and the immune system. In the human organism various carotenoids are present, some of which are retinoid precursors. The bioactive derivatives of these retinoids are the retinoic acids, which can potently activate nuclear hormone receptors such as the retinoic acid receptor and the retinoid X receptor. In this study, we aimed to assess how plasma carotenoid and retinoid concentrations along with the ratio of their isomers are altered in atopic dermatitis (AD) patients (n = 20) compared to healthy volunteers (HV, n = 20). The study indicated that plasma levels of the carotenoids lutein (HV 198 ± 14 ng/mL, AD 158 ± 12 ng/mL, p = 0.02; all values in mean ± SEM), zeaxanthin (HV 349 ± 30 ng/mL, AD 236 ± 18 ng/mL, p ≤ 0.01), as well as the retinoids retinol (HV 216 ± 20 ng/mL, AD 167 ± 17 ng/mL, p = 0.04) and all-trans-retinoic acid (HV 1.1 ± 0.1 ng/mL, AD 0.7 ± 0.1 ng/mL, p = 0.04) were significantly lower in the AD-patients, while lycopene isomers, α-carotene, and β-carotene levels were comparable to that determined in the healthy volunteers. In addition, the ratios of 13-cis- vs. all-trans-lycopene (HV 0.31 ± 0.01, AD 0.45 ± 0.07, p = 0.03) as well as 13-cis- vs. all-trans-retinoic acid (HV 1.4 ± 0.2, AD 2.6 ± 0.6, p = 0.03) were increased in the plasma of AD-patients indicating an AD-specific 13-cis-isomerisation. A positive correlation with SCORAD was calculated with 13-cis- vs. all-trans-lycopene ratio (r = 0.40, p = 0.01), while a negative correlation was observed with zeaxanthin plasma levels (r = -0.42, p = 0.01). Based on our results, we conclude that in the plasma of AD-patients various carotenoids and retinoids are present at lower concentrations, while the ratio of selected lycopene isomers also differed in the AD-patient group. An increase in plasma isomers of both lycopene and retinoic acid may cause an altered activation of nuclear hormone receptor signaling pathways and thus may be partly responsible for the AD-phenotype.
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Affiliation(s)
- Renata Lucas
- Department of Dermatology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary.
| | - Johanna Mihály
- Department of Biochemistry and Molecular Biology, University of Debrecen, 4032 Debrecen, Hungary.
| | - Gordon M Lowe
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK.
| | - Daniel L Graham
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK.
- Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK.
| | | | - Andrea Szegedi
- Department of Dermatology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary.
| | - Daniel Töröcsik
- Department of Dermatology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary.
| | - Ralph Rühl
- Department of Biochemistry and Molecular Biology, University of Debrecen, 4032 Debrecen, Hungary.
- Paprika Bioanalytics BT, 4002 Debrecen, Hungary.
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75
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Kojima M, Nakajima I, Arakawa A, Mikawa S, Matsumoto T, Uenishi H, Nakamura Y, Taniguchi M. Differences in gene expression profiles for subcutaneous adipose, liver, and skeletal muscle tissues between Meishan and Landrace pigs with different backfat thicknesses. PLoS One 2018; 13:e0204135. [PMID: 30240433 PMCID: PMC6150482 DOI: 10.1371/journal.pone.0204135] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 09/03/2018] [Indexed: 01/10/2023] Open
Abstract
Backfat thickness is one of the most important traits of commercially raised pigs. Meishan pigs are renowned for having thicker backfat than Landrace pigs. To examine the genetic factors responsible for the differences, we first produced female crossbred pig lines by mating Landrace (L) × Large White (W) × Duroc (D) females (LWD) with Landrace (L) or Meishan (M) boars (i.e., LWD × L = LWDL for Landrace offspring and LWD × M = LWDM for the Meishan offspring). We confirmed that LWDM pigs indeed had a thicker backfat than LWDL pigs. Next, we performed gene expression microarray analysis in both genetic lines to examine differentially expressed genes (DEGs) in energy metabolism-related tissues, subcutaneous adipose (fat), liver, and longissimus dorsi muscle tissues. We analyzed the annotation of DEGs (2-fold cutoff) to functionally categorize them by Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathways. The number of DEGs in muscle tissues of both lines was much less than that in fat and liver tissues, indicating that DEGs in muscle tissues may not contribute much to differences in backfat thickness. In contrast, several genes related to muscle (in fat tissue) and lipid metabolism (in liver tissue) were more upregulated in LWDM pigs than LWDL pigs, indicating that those DEGs might be responsible for differences in backfat thickness. The different genome-wide gene expression profiles in the fat, liver, and muscle tissues between genetic lines can provide useful information for pig breeders.
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Affiliation(s)
- Misaki Kojima
- Animal Genome Unit, Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Ikuyo Nakajima
- Meat Quality Research Unit, Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Aisaku Arakawa
- Animal Genome Unit, Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Satoshi Mikawa
- Animal Genome Unit, Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Toshimi Matsumoto
- Animal Bioregulation Unit, Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Hirohide Uenishi
- Animal Bioregulation Unit, Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Yuki Nakamura
- Insect Genome Research Unit, Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Masaaki Taniguchi
- Animal Genome Unit, Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
- * E-mail:
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76
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Moutinho M, Codocedo JF, Puntambekar SS, Landreth GE. Nuclear Receptors as Therapeutic Targets for Neurodegenerative Diseases: Lost in Translation. Annu Rev Pharmacol Toxicol 2018; 59:237-261. [PMID: 30208281 DOI: 10.1146/annurev-pharmtox-010818-021807] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Neurodegenerative diseases are characterized by a progressive loss of neurons that leads to a broad range of disabilities, including severe cognitive decline and motor impairment, for which there are no effective therapies. Several lines of evidence support a putative therapeutic role of nuclear receptors (NRs) in these types of disorders. NRs are ligand-activated transcription factors that regulate the expression of a wide range of genes linked to metabolism and inflammation. Although the activation of NRs in animal models of neurodegenerative disease exhibits promising results, the translation of this strategy to clinical practice has been unsuccessful. In this review we discuss the role of NRs in neurodegenerative diseases in light of preclinical and clinical studies, as well as new findings derived from the analysis of transcriptomic databases from humans and animal models. We discuss the failure in the translation of NR-based therapeutic approaches and consider alternative and novel research avenues in the development of effective therapies for neurodegenerative diseases.
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Affiliation(s)
- Miguel Moutinho
- Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA;
| | - Juan F Codocedo
- Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA;
| | - Shweta S Puntambekar
- Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA;
| | - Gary E Landreth
- Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA;
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77
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Shen D, Yu X, Wu Y, Chen Y, Li G, Cheng F, Xia L. Emerging roles of bexarotene in the prevention, treatment and anti-drug resistance of cancers. Expert Rev Anticancer Ther 2018. [PMID: 29521139 DOI: 10.1080/14737140.2018.1449648] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Danyang Shen
- Department of Urology and Chawnshang Chang Liver Cancer Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoming Yu
- Department of Urology and Chawnshang Chang Liver Cancer Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yan Wu
- Department of Pharmacy, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yuanlei Chen
- Department of Urology and Chawnshang Chang Liver Cancer Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Gonghui Li
- Department of Urology and Chawnshang Chang Liver Cancer Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Feng Cheng
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Liqun Xia
- Department of Urology and Chawnshang Chang Liver Cancer Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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78
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Hiebl V, Ladurner A, Latkolik S, Dirsch VM. Natural products as modulators of the nuclear receptors and metabolic sensors LXR, FXR and RXR. Biotechnol Adv 2018; 36:1657-1698. [PMID: 29548878 DOI: 10.1016/j.biotechadv.2018.03.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 03/02/2018] [Accepted: 03/08/2018] [Indexed: 01/25/2023]
Abstract
Nuclear receptors (NRs) represent attractive targets for the treatment of metabolic syndrome-related diseases. In addition, natural products are an interesting pool of potential ligands since they have been refined under evolutionary pressure to interact with proteins or other biological targets. This review aims to briefly summarize current basic knowledge regarding the liver X (LXR) and farnesoid X receptors (FXR) that form permissive heterodimers with retinoid X receptors (RXR). Natural product-based ligands for these receptors are summarized and the potential of LXR, FXR and RXR as targets in precision medicine is discussed.
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Affiliation(s)
- Verena Hiebl
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
| | - Angela Ladurner
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria.
| | - Simone Latkolik
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
| | - Verena M Dirsch
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
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79
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Niu H, Fujiwara H, di Martino O, Hadwiger G, Frederick TE, Menéndez-Gutiérrez MP, Ricote M, Bowman GR, Welch JS. Endogenous retinoid X receptor ligands in mouse hematopoietic cells. Sci Signal 2017; 10:10/503/eaan1011. [PMID: 29089448 DOI: 10.1126/scisignal.aan1011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The retinoid X receptor α (RXRA) has been implicated in diverse hematological processes. To identify natural ligands of RXRA that are present in hematopoietic cells, we adapted an upstream activation sequence-green fluorescent protein (UAS-GFP) reporter mouse to detect natural RXRA ligands in vivo. We observed reporter activity in diverse types of hematopoietic cells in vivo. Reporter activity increased during granulocyte colony-stimulating factor (G-CSF)-induced granulopoiesis and after phenylhydrazine (PHZ)-induced anemia, suggesting the presence of dynamically regulated natural RXRA ligands in hematopoietic cells. Mouse plasma activated Gal4-UAS reporter cells in vitro, and plasma from mice treated with G-CSF or PHZ recapitulated the patterns of reporter activation that we observed in vivo. Plasma from mice with dietary vitamin A deficiency only mildly reduced RXRA reporter activity, whereas plasma from mice on a fatty acid restriction diet reduced reporter activity, implicating fatty acids as plasma RXRA ligands. Through differential extraction coupled with mass spectrometry, we identified the long-chain fatty acid C24:5 as a natural RXRA ligand that was greatly increased in abundance in response to hematopoietic stress. Together, these data suggest that natural RXRA ligands are present and dynamically increased in abundance in mouse hematopoietic cells in vivo.
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Affiliation(s)
- Haixia Niu
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hideji Fujiwara
- Diabetic Cardiovascular Disease Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Orsola di Martino
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Gayla Hadwiger
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Thomas E Frederick
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - María P Menéndez-Gutiérrez
- Myocardial Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares Carlos III, Madrid 28029, Spain
| | - Mercedes Ricote
- Myocardial Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares Carlos III, Madrid 28029, Spain
| | - Gregory R Bowman
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - John S Welch
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
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80
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Novotný JP, Chughtai AA, Kostrouchová M, Kostrouchová V, Kostrouch D, Kaššák F, Kaňa R, Schierwater B, Kostrouchová M, Kostrouch Z. Trichoplax adhaerens reveals a network of nuclear receptors sensitive to 9- cis-retinoic acid at the base of metazoan evolution. PeerJ 2017; 5:e3789. [PMID: 28975052 PMCID: PMC5624297 DOI: 10.7717/peerj.3789] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 08/18/2017] [Indexed: 12/26/2022] Open
Abstract
Trichoplax adhaerens, the only known species of Placozoa is likely to be closely related to an early metazoan that preceded branching of Cnidaria and Bilateria. This animal species is surprisingly well adapted to free life in the World Ocean inhabiting tidal costal zones of oceans and seas with warm to moderate temperatures and shallow waters. The genome of T. adhaerens (sp. Grell) includes four nuclear receptors, namely orthologue of RXR (NR2B), HNF4 (NR2A), COUP-TF (NR2F) and ERR (NR3B) that show a high degree of similarity with human orthologues. In the case of RXR, the sequence identity to human RXR alpha reaches 81% in the DNA binding domain and 70% in the ligand binding domain. We show that T. adhaerens RXR (TaRXR) binds 9-cis retinoic acid (9-cis-RA) with high affinity, as well as high specificity and that exposure of T. adhaerens to 9-cis-RA regulates the expression of the putative T. adhaerens orthologue of vertebrate L-malate-NADP+ oxidoreductase (EC 1.1.1.40) which in vertebrates is regulated by a heterodimer of RXR and thyroid hormone receptor. Treatment by 9-cis-RA alters the relative expression profile of T. adhaerens nuclear receptors, suggesting the existence of natural ligands. Keeping with this, algal food composition has a profound effect on T. adhaerens growth and appearance. We show that nanomolar concentrations of 9-cis-RA interfere with T. adhaerens growth response to specific algal food and causes growth arrest. Our results uncover an endocrine-like network of nuclear receptors sensitive to 9-cis-RA in T. adhaerens and support the existence of a ligand-sensitive network of nuclear receptors at the base of metazoan evolution.
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Affiliation(s)
- Jan Philipp Novotný
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic.,Department of Medicine V., University of Heidelberg, Heidelberg, Germany
| | - Ahmed Ali Chughtai
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic
| | - Markéta Kostrouchová
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic.,Department of Pathology, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | | | - David Kostrouch
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic
| | - Filip Kaššák
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic
| | - Radek Kaňa
- Institute of Microbiology, Laboratory of Photosynthesis, Czech Academy of Sciences, Třeboň, Czech Republic
| | - Bernd Schierwater
- Institute for Animal Ecology and Cell Biology, University of Veterinary Medicine, Hannover, Germany.,Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, United States of America
| | - Marta Kostrouchová
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic
| | - Zdenek Kostrouch
- Biocev, First Faculty of Medicine, Charles University, Vestec, Czech Republic
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81
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Retinoid X receptor suppresses a metastasis-promoting transcriptional program in myeloid cells via a ligand-insensitive mechanism. Proc Natl Acad Sci U S A 2017; 114:10725-10730. [PMID: 28923935 DOI: 10.1073/pnas.1700785114] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Retinoid X receptor (RXR) regulates several key functions in myeloid cells, including inflammatory responses, phagocytosis, chemokine secretion, and proangiogenic activity. Its importance, however, in tumor-associated myeloid cells is unknown. In this study, we demonstrate that deletion of RXR in myeloid cells enhances lung metastasis formation while not affecting primary tumor growth. We show that RXR deficiency leads to transcriptomic changes in the lung myeloid compartment characterized by increased expression of prometastatic genes, including important determinants of premetastatic niche formation. Accordingly, RXR-deficient myeloid cells are more efficient in promoting cancer cell migration and invasion. Our results suggest that the repressive activity of RXR on prometastatic genes is mediated primarily through direct DNA binding of the receptor along with nuclear receptor corepressor (NCoR) and silencing mediator of retinoic acid and thyroid hormone receptor (SMRT) corepressors and is largely unresponsive to ligand activation. In addition, we found that expression and transcriptional activity of RXRα is down-modulated in peripheral blood mononuclear cells of patients with lung cancer, particularly in advanced and metastatic disease. Overall, our results identify RXR as a regulator in the myeloid cell-assisted metastatic process and establish lipid-sensing nuclear receptors in the microenvironmental regulation of tumor progression.
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82
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Retinol saturase modulates lipid metabolism and the production of reactive oxygen species. Arch Biochem Biophys 2017; 633:93-102. [PMID: 28927883 DOI: 10.1016/j.abb.2017.09.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 09/06/2017] [Accepted: 09/13/2017] [Indexed: 11/20/2022]
Abstract
Retinol saturase (RetSat) catalyzes the saturation of double bonds of all-trans-retinol leading to the production of dihydroretinoid metabolites. Beside its role in retinoid metabolism, there is evidence that RetSat modulates the cellular response to oxidative stress and plays critical roles in adipogenesis and the accumulation of lipids. Here, we explore the relationship between RetSat, lipid metabolism and oxidative stress using in vitro and in vivo models with altered expression of RetSat. Our results reveal that RetSat is a potent modulator of the cellular response to oxidative stress and the generation of reactive oxygen species (ROS). The levels of reactive aldehydes products of lipid peroxidation, as measured based on thiobarbituric acid reactivity, are increased in RetSat overexpressing cells and, conversely, reduced in cells and tissues with reduced or absent expression of RetSat compared to controls. Despite increased weight gain, neutral lipid accumulation and alterations in hepatic lipid composition, RetSat-/- mice exhibit normal responses to insulin. In conclusion, our findings further expand upon the role of RetSat in oxidative stress and lipid metabolism and could provide insight in the significance of alterations of RetSat expression as observed in metabolic disorders.
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83
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Retinol saturase coordinates liver metabolism by regulating ChREBP activity. Nat Commun 2017; 8:384. [PMID: 28855500 PMCID: PMC5577314 DOI: 10.1038/s41467-017-00430-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 06/28/2017] [Indexed: 11/09/2022] Open
Abstract
The liver integrates multiple metabolic pathways to warrant systemic energy homeostasis. An excessive lipogenic flux due to chronic dietary stimulation contributes to the development of hepatic steatosis, dyslipidemia and hyperglycemia. Here we show that the oxidoreductase retinol saturase (RetSat) is involved in the development of fatty liver. Hepatic RetSat expression correlates with steatosis and serum triglycerides (TGs) in humans. Liver-specific depletion of RetSat in dietary obese mice lowers hepatic and circulating TGs and normalizes hyperglycemia. Mechanistically, RetSat depletion reduces the activity of carbohydrate response element binding protein (ChREBP), a cellular hexose-phosphate sensor and inducer of lipogenesis. Defects upon RetSat depletion are rescued by ectopic expression of ChREBP but not by its putative enzymatic product 13,14-dihydroretinol, suggesting that RetSat affects hepatic glucose sensing independent of retinol conversion. Thus, RetSat is a critical regulator of liver metabolism functioning upstream of ChREBP. Pharmacological inhibition of liver RetSat may represent a therapeutic approach for steatosis.Fatty liver is one of the major features of metabolic syndrome and its development is associated with deregulation of systemic lipid and glucose homeostasis. Here Heidenreich et al. show that retinol saturase is implicated in hepatic lipid metabolism by regulating the activity of the transcription factor ChREBP.
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84
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Bohn T, Desmarchelier C, Dragsted LO, Nielsen CS, Stahl W, Rühl R, Keijer J, Borel P. Host-related factors explaining interindividual variability of carotenoid bioavailability and tissue concentrations in humans. Mol Nutr Food Res 2017; 61:1600685. [PMID: 28101967 PMCID: PMC5516247 DOI: 10.1002/mnfr.201600685] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 12/19/2016] [Accepted: 01/04/2017] [Indexed: 12/14/2022]
Abstract
Carotenoid dietary intake and their endogenous levels have been associated with a decreased risk of several chronic diseases. There are indications that carotenoid bioavailability depends, in addition to the food matrix, on host factors. These include diseases (e.g. colitis), life-style habits (e.g. smoking), gender and age, as well as genetic variations including single nucleotide polymorphisms that govern carotenoid metabolism. These are expected to explain interindividual differences that contribute to carotenoid uptake, distribution, metabolism and excretion, and therefore possibly also their association with disease risk. For instance, digestion enzymes fostering micellization (PNLIP, CES), expression of uptake/efflux transporters (SR-BI, CD36, NPC1L1), cleavage enzymes (BCO1/2), intracellular transporters (FABP2), secretion into chylomicrons (APOB, MTTP), carotenoid metabolism in the blood and liver (LPL, APO C/E, LDLR), and distribution to target tissues such as adipose tissue or macula (GSTP1, StARD3) depend on the activity of these proteins. In addition, human microbiota, e.g. via altering bile-acid concentrations, may play a role in carotenoid bioavailability. In order to comprehend individual, variable responses to these compounds, an improved knowledge on intra-/interindividual factors determining carotenoid bioavailability, including tissue distribution, is required. Here, we highlight the current knowledge on factors that may explain such intra-/interindividual differences.
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Affiliation(s)
- Torsten Bohn
- Luxembourg Institute of HealthStrassenLuxembourg
| | | | - Lars O. Dragsted
- Department of Nutrition, Exercise and SportsUniversity of CopenhagenFrederiksberg CDenmark
| | - Charlotte S. Nielsen
- Department of Nutrition, Exercise and SportsUniversity of CopenhagenFrederiksberg CDenmark
| | - Wilhelm Stahl
- Institute of Biochemistry and Molecular Biology IHeinrich‐Heine‐University DüsseldorfDüsseldorfGermany
| | - Ralph Rühl
- Paprika Bioanalytics BTDebrecenHungary
- MTA‐DE Public Health Research Group of the Hungarian Academy of SciencesFaculty of Public HealthUniversity of DebrecenDebrecenHungary
| | - Jaap Keijer
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
| | - Patrick Borel
- NORT, Aix‐Marseille Université, INRAINSERMMarseilleFrance
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85
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Menéndez-Gutiérrez MP, Ricote M. The multi-faceted role of retinoid X receptor in bone remodeling. Cell Mol Life Sci 2017; 74:2135-2149. [PMID: 28105491 PMCID: PMC11107715 DOI: 10.1007/s00018-017-2458-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/20/2016] [Accepted: 01/04/2017] [Indexed: 02/07/2023]
Abstract
Retinoid X receptors (RXRs) form a unique subclass within the nuclear receptor (NR) superfamily of ligand-dependent transcription factors. RXRs are obligatory partners for a number of other NRs, placing RXRs in a coordinating role at the crossroads of multiple signaling pathways. In addition, RXRs can function as self-sufficient homodimers. Recent advances have revealed RXRs as novel regulators of osteoclastogenesis and bone remodeling. This review outlines the versatility of RXR action in the control of transcription of bone-forming osteoblasts and bone-resorbing osteoclasts, both through heterodimerization with other NRs and through RXR homodimerization. RXR signaling is currently a major therapeutic target and, therefore, knowledge of how RXR signaling affects bone remodeling creates enormous potential for the translation of basic research findings into successful clinical therapies to increase bone mass and improve bone quality.
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Affiliation(s)
- María P Menéndez-Gutiérrez
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Melchor Fernández Almagro, 3, 28029, Madrid, Spain
| | - Mercedes Ricote
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Melchor Fernández Almagro, 3, 28029, Madrid, Spain.
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86
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Saeed A, Hoekstra M, Hoeke MO, Heegsma J, Faber KN. The interrelationship between bile acid and vitamin A homeostasis. Biochim Biophys Acta Mol Cell Biol Lipids 2017; 1862:496-512. [PMID: 28111285 DOI: 10.1016/j.bbalip.2017.01.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/04/2017] [Accepted: 01/18/2017] [Indexed: 12/12/2022]
Abstract
Vitamin A is a fat-soluble vitamin important for vision, reproduction, embryonic development, cell differentiation, epithelial barrier function and adequate immune responses. Efficient absorption of dietary vitamin A depends on the fat-solubilizing properties of bile acids. Bile acids are synthesized in the liver and maintained in an enterohepatic circulation. The liver is also the main storage site for vitamin A in the mammalian body, where an intimate collaboration between hepatocytes and hepatic stellate cells leads to the accumulation of retinyl esters in large cytoplasmic lipid droplet hepatic stellate cells. Chronic liver diseases are often characterized by disturbed bile acid and vitamin A homeostasis, where bile production is impaired and hepatic stellate cells lose their vitamin A in a transdifferentiation process to myofibroblasts, cells that produce excessive extracellular matrix proteins leading to fibrosis. Chronic liver diseases thus may lead to vitamin A deficiency. Recent data reveal an intricate crosstalk between vitamin A metabolites and bile acids, in part via the Retinoic Acid Receptor (RAR), Retinoid X Receptor (RXR) and the Farnesoid X Receptor (FXR), in maintaining vitamin A and bile acid homeostasis. Here, we provide an overview of the various levels of "communication" between vitamin A metabolites and bile acids and its relevance for the treatment of chronic liver diseases.
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Affiliation(s)
- Ali Saeed
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands; Institute of Molecular biology & Bio-technology, Bahauddin Zakariya University, Multan, Pakistan.
| | - Mark Hoekstra
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Martijn Oscar Hoeke
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Janette Heegsma
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands; Laboratory Medicine, Center for Liver, Digestive, and Metabolic Diseases, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Klaas Nico Faber
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
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87
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Peroxisome proliferator-activated receptor α (PPARα) contributes to control of melanogenesis in B16 F10 melanoma cells. Arch Dermatol Res 2017; 309:141-157. [PMID: 28084540 DOI: 10.1007/s00403-016-1711-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/20/2016] [Accepted: 12/23/2016] [Indexed: 01/10/2023]
Abstract
Recent studies revealed the cooperation between peroxisome proliferator-activated receptor gamma (PPARγ) and α-MSH signaling, which results in enhanced melanogenesis in melanocytes and melanoma cells. However, the agonists of PPARα, such as fenofibrate, exert depigmenting effect. Therefore, we aimed to check how the PPARα expression level affects the antimelanogenic activity of fenofibrate and whether PPARα modulates melanogenesis independently of its agonist. To answer these questions, we used three B16 F10-derived cell lines, which varied in the PPARα expression level and were developed by stable transfection with plasmids driving shRNA-based PPARα silencing or overexpression of PPARα-emerald GFP fusion protein. Melanin contents were assessed with electron paramagnetic resonance spectroscopy along with color component image analysis-a novel approach to pigment content characteristics in melanoma cells. B16 F10 wt and Ctrl shRNA lines showed intermediate pigmentation, whereas the pigmentation of the B16 F10-derived cell lines was inversely correlated with the PPARα expression level. We observed that cells overexpressing PPARα were almost amelanotic and cells with reduced PPARα protein level were heavily melanized. Furthermore, fenofibrate down-regulated the melanogenic apparatus (MITF, tyrosinase, and tyrosinase-related proteins) in the cells with the regular PPARα expression level resulting in their visibly lower total melanin content in all the cell lines. From these observations, we conclude that fenofibrate works as a strong depigmenting agent, which acts independently of PPARα, but in an additive fashion. Our results also indicate that alterations in PGC-1a acetylation and expression level might contribute to the regulation of melanogenesis by PPARα and fenofibrate.
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88
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The Function and Evolution of Nuclear Receptors in Insect Embryonic Development. Curr Top Dev Biol 2017; 125:39-70. [DOI: 10.1016/bs.ctdb.2017.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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89
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Landrier JF, Kasiri E, Karkeni E, Mihály J, Béke G, Weiss K, Lucas R, Aydemir G, Salles J, Walrand S, de Lera AR, Rühl R. Reduced adiponectin expression after high-fat diet is associated with selective up-regulation of ALDH1A1 and further retinoic acid receptor signaling in adipose tissue. FASEB J 2016; 31:203-211. [PMID: 27729412 PMCID: PMC5161515 DOI: 10.1096/fj.201600263rr] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 09/22/2016] [Indexed: 12/22/2022]
Abstract
Adiponectin is an adipocyte-derived adipokine with potent antidiabetic, anti-inflammatory, and antiatherogenic activity. Long-term, high-fat diet results in gain of body weight, adiposity, further inflammatory-based cardiovascular diseases, and reduced adiponectin secretion. Vitamin A derivatives/retinoids are involved in several of these processes, which mainly take place in white adipose tissue (WAT). In this study, we examined adiponectin expression as a function of dietary high-fat and high–vitamin A conditions in mice. A decrease of adiponectin expression in addition to an up-regulation of aldehyde dehydrogenase A1 (ALDH1A1), retinoid signaling, and retinoic acid response element signaling was selectively observed in WAT of mice fed a normal–vitamin A, high-fat diet. Reduced adiponectin expression in WAT was also observed in mice fed a high–vitamin A diet. Adipocyte cell culture revealed that endogenous and synthetic retinoic acid receptor (RAR)α- and RARγ-selective agonists, as well as a synthetic retinoid X receptor agonist, efficiently reduced adiponectin expression, whereas ALDH1A1 expression only increased with RAR agonists. We conclude that reduced adiponectin expression under high-fat dietary conditions is dependent on 1) increased ALDH1A1 expression in adipocytes, which does not increase all-trans-retinoic acid levels; 2) further RAR ligand–induced, WAT-selective, increased retinoic acid response element–mediated signaling; and 3) RAR ligand–dependent reduction of adiponectin expression.—Landrier, J.-F., Kasiri, E., Karkeni, E., Mihály, J., Béke, G., Weiss, K., Lucas, R., Aydemir, G., Salles, J., Walrand, S., de Lera, A. R., Rühl, R. Reduced adiponectin expression after high-fat diet is associated with selective up-regulation of ALDH1A1 and further retinoic acid receptor signaling in adipose tissue.
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Affiliation(s)
- Jean-Francois Landrier
- Institut National de la Recherche Agronomique, Unités Mixtes de Recherche 1260, Marseille, France.,INSERM, Unités Mixtes de Recherche 1062, Nutrition, Obésité et Risque Thrombotique, Marseille, France.,Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - Elnaz Kasiri
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary.,MTA-DE Public Health Research Group, Hungarian Academy of Sciences, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
| | - Esma Karkeni
- Institut National de la Recherche Agronomique, Unités Mixtes de Recherche 1260, Marseille, France.,INSERM, Unités Mixtes de Recherche 1062, Nutrition, Obésité et Risque Thrombotique, Marseille, France.,Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - Johanna Mihály
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Gabriella Béke
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Kathrin Weiss
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Renata Lucas
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Gamze Aydemir
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Jérome Salles
- Unités Mixtes de Recherche, Institut National de la Recherche Agronomique (INRA) 1019 Unité de Nutrition Humaine, Centre de Recherches INRA de Clermont-Ferrand/Theix, Saint-Genès-Champanelle, France
| | - Stéphane Walrand
- Unités Mixtes de Recherche, Institut National de la Recherche Agronomique (INRA) 1019 Unité de Nutrition Humaine, Centre de Recherches INRA de Clermont-Ferrand/Theix, Saint-Genès-Champanelle, France
| | - Angel R de Lera
- Departamento de Química Orgánica, Universidade de Vigo, Facultad de Química, Centro de Investigaciones Biomédicas and Instituto de Investigación Biomédica de Vigo, Vigo, Spain; and
| | - Ralph Rühl
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary; .,MTA-DE Public Health Research Group, Hungarian Academy of Sciences, Faculty of Public Health, University of Debrecen, Debrecen, Hungary.,Paprika Bioanalytics BT, Debrecen, Hungary
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90
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Exogenous Modulation of Retinoic Acid Signaling Affects Adult RGC Survival in the Frog Visual System after Optic Nerve Injury. PLoS One 2016; 11:e0162626. [PMID: 27611191 PMCID: PMC5017682 DOI: 10.1371/journal.pone.0162626] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 08/25/2016] [Indexed: 02/04/2023] Open
Abstract
After lesions to the mammalian optic nerve, the great majority of retinal ganglion cells (RGCs) die before their axons have even had a chance to regenerate. Frog RGCs, on the other hand, suffer only an approximately 50% cell loss, and we have previously investigated the mechanisms by which the application of growth factors can increase their survival rate. Retinoic acid (RA) is a vitamin A-derived lipophilic molecule that plays major roles during development of the nervous system. The RA signaling pathway is also present in parts of the adult nervous system, and components of it are upregulated after injury in peripheral nerves but not in the CNS. Here we investigate whether RA signaling affects long-term RGC survival at 6 weeks after axotomy. Intraocular injection of all-trans retinoic acid (ATRA), the retinoic acid receptor (RAR) type-α agonist AM80, the RARβ agonist CD2314, or the RARγ agonist CD1530, returned axotomized RGC numbers to almost normal levels. On the other hand, inhibition of RA synthesis with disulfiram, or of RAR receptors with the pan-RAR antagonist Ro-41-5253, or the RARβ antagonist LE135E, greatly reduced the survival of the axotomized neurons. Axotomy elicited a strong activation of the MAPK, STAT3 and AKT pathways; this activation was prevented by disulfiram or by RAR antagonists. Finally, addition of exogenous ATRA stimulated the activation of the first two of these pathways. Future experiments will investigate whether these strong survival-promoting effects of RA are mediated via the upregulation of neurotrophins.
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91
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Aydemir G, Kasiri Y, Bartók EM, Birta E, Fröhlich K, Böhm V, Mihaly J, Rühl R. Lycopene supplementation restores vitamin A deficiency in mice and possesses thereby partial pro-vitamin A activity transmitted via RAR signaling. Mol Nutr Food Res 2016; 60:2413-2420. [DOI: 10.1002/mnfr.201600031] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 05/25/2016] [Accepted: 05/30/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Gamze Aydemir
- Department of Biochemistry and Molecular Biology; Medical and Health Science Center University of Debrecen; Debrecen Hungary
| | - Yasamin Kasiri
- Department of Biochemistry and Molecular Biology; Medical and Health Science Center University of Debrecen; Debrecen Hungary
| | - Emöke-Márta Bartók
- Department of Biochemistry and Molecular Biology; Medical and Health Science Center University of Debrecen; Debrecen Hungary
| | - Eszter Birta
- Department of Biochemistry and Molecular Biology; Medical and Health Science Center University of Debrecen; Debrecen Hungary
| | - Kati Fröhlich
- Institute of Nutrition; Friedrich Schiller University Jena; Jena Germany
| | - Volker Böhm
- Institute of Nutrition; Friedrich Schiller University Jena; Jena Germany
| | - Johanna Mihaly
- Department of Biochemistry and Molecular Biology; Medical and Health Science Center University of Debrecen; Debrecen Hungary
| | - Ralph Rühl
- Department of Biochemistry and Molecular Biology; Medical and Health Science Center University of Debrecen; Debrecen Hungary
- Paprika Bioanalytics BT; Debrecen Hungary
- MTA-DE Public Health Research Group of the Hungarian Academy of Sciences; Faculty of Public Health University Debrecen; Debrecen Hungary
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92
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93
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Vaz B, Alvarez R, de Lera AR. Stereocontrolled synthesis of ( S )-9- cis - and ( S )-11- cis -13,14-dihydroretinoic acid. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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94
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de Lera ÁR, Krezel W, Rühl R. An Endogenous Mammalian Retinoid X Receptor Ligand, At Last! ChemMedChem 2016; 11:1027-37. [PMID: 27151148 DOI: 10.1002/cmdc.201600105] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 03/15/2016] [Indexed: 12/27/2022]
Abstract
9-cis-Retinoic acid was identified and claimed to be the endogenous ligand of the retinoid X receptors (RXRs) in 1992. Since then, the endogenous presence of this compound has never been rigorously confirmed. Instead, concerns have been raised by other groups that have reported that 9-cis-retinoic acid is undetectable or that its presence occurs at very low levels. Furthermore, these low levels could not satisfactorily explain the physiological activation of RXR. Alternative ligands, among them various lipids, have also been identified, but also did not fulfill criteria for rigorous endogenous relevance, and their consideration as bona fide endogenous mammalian RXR ligand has likewise been questioned. Recently, novel studies claim that the saturated analogue 9-cis-13,14-dihydroretinoic acid functions as an endogenous physiologically relevant mammalian RXR ligand.
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Affiliation(s)
- Ángel R de Lera
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IBIV, Universidade de Vigo, Campus As Lagoas-Marcosende, 36310, Vigo, Spain.
| | - Wojciech Krezel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Institut de la Santé et de la Recherche Médicale, U964, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7104, Université de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg, 67404, Illkirch, France
| | - Ralph Rühl
- Paprika Bioanalytics BT, Debrecen, Hungary.,MTA-DE, Public Health Research Group of the Hungarian Academy of Sciences, Faculty of Public Health, University of Debrecen, Hungary
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Retinoid X Receptor Agonists Upregulate Genes Responsible for the Biosynthesis of All-Trans-Retinoic Acid in Human Epidermis. PLoS One 2016; 11:e0153556. [PMID: 27078158 PMCID: PMC4831765 DOI: 10.1371/journal.pone.0153556] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 03/31/2016] [Indexed: 11/26/2022] Open
Abstract
UAB30 is an RXR selective agonist that has been shown to have potential cancer chemopreventive properties. Due to high efficacy and low toxicity, it is currently being evaluated in human Phase I clinical trials by the National Cancer Institute. While UAB30 shows promise as a low toxicity chemopreventive drug, the mechanism of its action is not well understood. In this study, we investigated the effects of UAB30 on gene expression in human organotypic skin raft cultures and mouse epidermis. The results of this study indicate that treatment with UAB30 results in upregulation of genes responsible for the uptake and metabolism of all-trans-retinol to all-trans-retinoic acid (ATRA), the natural agonist of RAR nuclear receptors. Consistent with the increased expression of these genes, the steady-state levels of ATRA are elevated in human skin rafts. In ultraviolet B (UVB) irradiated mouse skin, the expression of ATRA target genes is found to be reduced. A reduced expression of ATRA sensitive genes is also observed in epidermis of mouse models of UVB-induced squamous cell carcinoma and basal cell carcinomas. However, treatment of mouse skin with UAB30 prior to UVB irradiation prevents the UVB-induced decrease in expression of some of the ATRA-responsive genes. Considering its positive effects on ATRA signaling in the epidermis and its low toxicity, UAB30 could be used as a chemoprophylactic agent in the treatment of non-melanoma skin cancer, particularly in organ transplant recipients and other high risk populations.
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96
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Rühl R, Landrier JF. Dietary regulation of adiponectin by direct and indirect lipid activators of nuclear hormone receptors. Mol Nutr Food Res 2015; 60:175-84. [PMID: 26610729 DOI: 10.1002/mnfr.201500619] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/04/2015] [Accepted: 11/16/2015] [Indexed: 12/22/2022]
Abstract
Adiponectin is an adipokine mainly secreted by adipocytes that presents antidiabetic, anti-inflammatory, and antiatherogenic functions. Therefore, modulation of adiponectin expression represents a promising target for prevention or treatment of several diseases including insulin resistance and type II diabetes. Pharmacological agents such as the nuclear hormone receptor synthetic agonists like peroxisome proliferator activated receptor γ agonists are of particular interest in therapeutic strategies due to their ability to increase the plasma adiponectin concentration. Nutritional approaches are also of particular interest, especially in primary prevention, since some active compounds of our diet (notably vitamins, carotenoids, or other essential nutrients) are direct or indirect lipid-activators of nuclear hormone receptors and are modifiers of adiponectin expression and secretion. The aim of the present review is to summarize current knowledge about the nutritional regulation of adiponectin by derivatives of active compounds naturally present in the diet acting as indirect or direct activators of nuclear hormone receptors.
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Affiliation(s)
- R Rühl
- Paprika Bioanalytics BT, Debrecen, Hungary.,MTA-DE Public Health Research Group of the Hungarian Academy of Sciences, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
| | - J F Landrier
- INRA, Marseille, France.,INSERM, Nutrition, Obésité et Risque Thrombotique, Marseille, France.,Faculté de Médecine, Aix-Marseille Université, Marseille, France
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