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Meyer MR, Fredette NC, Howard TA, Hu C, Ramesh C, Daniel C, Amann K, Arterburn JB, Barton M, Prossnitz ER. G protein-coupled estrogen receptor protects from atherosclerosis. Sci Rep 2014; 4:7564. [PMID: 25532911 PMCID: PMC4274506 DOI: 10.1038/srep07564] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 11/28/2014] [Indexed: 02/07/2023] Open
Abstract
Coronary atherosclerosis and myocardial infarction in postmenopausal women have been linked to inflammation and reduced nitric oxide (NO) formation. Natural estrogen exerts protective effects on both processes, yet also displays uterotrophic activity. Here, we used genetic and pharmacologic approaches to investigate the role of the G protein-coupled estrogen receptor (GPER) in atherosclerosis. In ovary-intact mice, deletion of gper increased atherosclerosis progression, total and LDL cholesterol levels and inflammation while reducing vascular NO bioactivity, effects that were in some cases aggravated by surgical menopause. In human endothelial cells, GPER was expressed on intracellular membranes and mediated eNOS activation and NO formation, partially accounting for estrogen-mediated effects. Chronic treatment with G-1, a synthetic, highly selective small molecule agonist of GPER, reduced postmenopausal atherosclerosis and inflammation without uterotrophic effects. In summary, this study reveals an atheroprotective function of GPER and introduces selective GPER activation as a novel therapeutic approach to inhibit postmenopausal atherosclerosis and inflammation in the absence of uterotrophic activity.
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Affiliation(s)
- Matthias R Meyer
- Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Natalie C Fredette
- Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Tamara A Howard
- Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Chelin Hu
- Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Chinnasamy Ramesh
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM, USA
| | - Christoph Daniel
- Pathologisches Institut, Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Kerstin Amann
- Pathologisches Institut, Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Jeffrey B Arterburn
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM, USA
| | - Matthias Barton
- Molecular Internal Medicine, University of Zürich, Zürich, Switzerland
| | - Eric R Prossnitz
- Department of Cell Biology and Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
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Nardocci G, Navarro C, Cortés PP, Imarai M, Montoya M, Valenzuela B, Jara P, Acuña-Castillo C, Fernández R. Neuroendocrine mechanisms for immune system regulation during stress in fish. FISH & SHELLFISH IMMUNOLOGY 2014; 40:531-538. [PMID: 25123831 DOI: 10.1016/j.fsi.2014.08.001] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 07/10/2014] [Accepted: 08/03/2014] [Indexed: 06/03/2023]
Abstract
In the last years, the aquaculture crops have experienced an explosive and intensive growth, because of the high demand for protein. This growth has increased fish susceptibility to diseases and subsequent death. The constant biotic and abiotic changes experienced by fish species in culture are challenges that induce physiological, endocrine and immunological responses. These changes mitigate stress effects at the cellular level to maintain homeostasis. The effects of stress on the immune system have been studied for many years. While acute stress can have beneficial effects, chronic stress inhibits the immune response in mammals and teleost fish. In response to stress, a signaling cascade is triggered by the activation of neural circuits in the central nervous system because the hypothalamus is the central modulator of stress. This leads to the production of catecholamines, corticosteroid-releasing hormone, adrenocorticotropic hormone and glucocorticoids, which are the essential neuroendocrine mediators for this activation. Because stress situations are energetically demanding, the neuroendocrine signals are involved in metabolic support and will suppress the "less important" immune function. Understanding the cellular mechanisms of the neuroendocrine regulation of immunity in fish will allow the development of new pharmaceutical strategies and therapeutics for the prevention and treatment of diseases triggered by stress at all stages of fish cultures for commercial production.
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Affiliation(s)
- Gino Nardocci
- Facultad de Ciencias Biológicas y Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile. Av. República 252, 8370134 Santiago, Chile
| | - Cristina Navarro
- Facultad de Ciencias Biológicas y Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile. Av. República 252, 8370134 Santiago, Chile
| | - Paula P Cortés
- Facultad de Ciencias Biológicas y Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile. Av. República 252, 8370134 Santiago, Chile
| | - Mónica Imarai
- Centro de Biotecnología Acuícola (CBA), Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile. Av. Libertador Bernardo O'Higgins 3363, Estación Central, 9170022 Santiago, Chile
| | - Margarita Montoya
- Centro de Biotecnología Acuícola (CBA), Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile. Av. Libertador Bernardo O'Higgins 3363, Estación Central, 9170022 Santiago, Chile
| | - Beatriz Valenzuela
- Centro de Biotecnología Acuícola (CBA), Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile. Av. Libertador Bernardo O'Higgins 3363, Estación Central, 9170022 Santiago, Chile
| | - Pablo Jara
- Centro de Biotecnología Acuícola (CBA), Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile. Av. Libertador Bernardo O'Higgins 3363, Estación Central, 9170022 Santiago, Chile
| | - Claudio Acuña-Castillo
- Centro de Biotecnología Acuícola (CBA), Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile. Av. Libertador Bernardo O'Higgins 3363, Estación Central, 9170022 Santiago, Chile.
| | - Ricardo Fernández
- Facultad de Ciencias Biológicas y Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile. Av. República 252, 8370134 Santiago, Chile.
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Wenger M, Shved N, Akgül G, Caelers A, Casanova A, Segner H, Eppler E. Developmental oestrogen exposure differentially modulates IGF-I and TNF-α expression levels in immune organs of Yersinia ruckeri-challenged young adult rainbow trout (Oncorhynchus mykiss). Gen Comp Endocrinol 2014; 205:168-75. [PMID: 24874061 DOI: 10.1016/j.ygcen.2014.05.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 05/12/2014] [Accepted: 05/17/2014] [Indexed: 01/24/2023]
Abstract
Intensified aquaculture has strong impact on fish health by stress and infectious diseases and has stimulated the interest in the orchestration of cytokines and growth factors, particularly their influence by environmental factors, however, only scarce data are available on the GH/IGF-system, central physiological system for development and tissue shaping. Most recently, the capability of the host to cope with tissue damage has been postulated as critical for survival. Thus, the present study assessed the combined impacts of estrogens and bacterial infection on the insulin-like growth factors (IGF) and tumor-necrosis factor (TNF)-α. Juvenile rainbow trout were exposed to 2 different concentrations of 17β-estradiol (E2) and infected with Yersinia ruckeri. Gene expressions of IGF-I, IGF-II and TNF-α were measured in liver, head kidney and spleen and all 4 estrogen receptors (ERα1, ERα2, ERβ1 and ERβ2) known in rainbow trout were measured in liver. After 5 weeks of E2 treatment, hepatic up-regulation of ERα1 and ERα2, but down-regulation of ERß1 and ERß2 were observed in those groups receiving E2-enriched food. In liver, the results further indicate a suppressive effect of Yersinia-infection regardless of E2-treatment on day 3, but not of E2-treatment on IGF-I whilst TNF-α gene expression was not influenced by Yersinia-infection but was reduced after 5 weeks of E2-treatment. In spleen, the results show a stimulatory effect of Yersinia-infection, but not of E2-treatment on both, IGF-I and TNF-α gene expressions. In head kidney, E2 strongly suppressed both, IGF-I and TNF-α. To summarise, the treatment effects were tissue- and treatment-specific and point to a relevant role of IGF-I in infection.
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Affiliation(s)
- Michael Wenger
- Research Group Neuro-Endocrine-Immune Interactions, Institute of Anatomy, University of Zurich, Zurich, Switzerland; Centre for Fish and Wildlife Health, Institute of Animal Pathology, University of Bern, Bern, Switzerland
| | - Natallia Shved
- Research Group Neuro-Endocrine-Immune Interactions, Institute of Anatomy, University of Zurich, Zurich, Switzerland; Centre for Evolutionary Medicine (ZEM), Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Gülfirde Akgül
- Research Group Neuro-Endocrine-Immune Interactions, Institute of Anatomy, University of Zurich, Zurich, Switzerland; Centre for Evolutionary Medicine (ZEM), Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Antje Caelers
- Research Group Neuro-Endocrine-Immune Interactions, Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Ayako Casanova
- Centre for Fish and Wildlife Health, Institute of Animal Pathology, University of Bern, Bern, Switzerland
| | - Helmut Segner
- Centre for Fish and Wildlife Health, Institute of Animal Pathology, University of Bern, Bern, Switzerland; Centre for Xenobiotic Risk Research (XERR), Zurich, Switzerland
| | - Elisabeth Eppler
- Research Group Neuro-Endocrine-Immune Interactions, Institute of Anatomy, University of Zurich, Zurich, Switzerland; Centre for Xenobiotic Risk Research (XERR), Zurich, Switzerland; Institute of Neuroradiology, University Hospital, Otto-von-Guericke University, Magdeburg, Germany.
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Iwanowicz LR, Stafford JL, Patiño R, Bengten E, Miller NW, Blazer VS. Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens. FISH & SHELLFISH IMMUNOLOGY 2014; 40:109-19. [PMID: 24973517 DOI: 10.1016/j.fsi.2014.06.021] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Revised: 05/06/2014] [Accepted: 06/18/2014] [Indexed: 05/02/2023]
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Prossnitz ER, Barton M. Estrogen biology: new insights into GPER function and clinical opportunities. Mol Cell Endocrinol 2014; 389:71-83. [PMID: 24530924 PMCID: PMC4040308 DOI: 10.1016/j.mce.2014.02.002] [Citation(s) in RCA: 285] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 02/04/2014] [Indexed: 12/16/2022]
Abstract
Estrogens play an important role in the regulation of normal physiology, aging and many disease states. Although the nuclear estrogen receptors have classically been described to function as ligand-activated transcription factors mediating genomic effects in hormonally regulated tissues, more recent studies reveal that estrogens also mediate rapid signaling events traditionally associated with G protein-coupled receptors. The G protein-coupled estrogen receptor GPER (formerly GPR30) has now become recognized as a major mediator of estrogen's rapid cellular effects throughout the body. With the discovery of selective synthetic ligands for GPER, both agonists and antagonists, as well as the use of GPER knockout mice, significant advances have been made in our understanding of GPER function at the cellular, tissue and organismal levels. In many instances, the protective/beneficial effects of estrogen are mimicked by selective GPER agonism and are absent or reduced in GPER knockout mice, suggesting an essential or at least parallel role for GPER in the actions of estrogen. In this review, we will discuss recent advances and our current understanding of the role of GPER and the activity of clinically used drugs, such as SERMs and SERDs, in physiology and disease. We will also highlight novel opportunities for clinical development towards GPER-targeted therapeutics, for molecular imaging, as well as for theranostic approaches and personalized medicine.
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Affiliation(s)
- Eric R Prossnitz
- Department of Cell Biology and Physiology, UNM Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM 87120, USA.
| | - Matthias Barton
- Molecular Internal Medicine, University of Zurich, Switzerland.
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