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Dworatzek E, Mahmoodzadeh S. Targeted basic research to highlight the role of estrogen and estrogen receptors in the cardiovascular system. Pharmacol Res 2017; 119:27-35. [PMID: 28119050 DOI: 10.1016/j.phrs.2017.01.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 11/18/2016] [Accepted: 01/17/2017] [Indexed: 10/20/2022]
Abstract
Epidemiological, clinical and animal studies revealed that sex differences exist in the manifestation and outcome of cardiovascular disease (CVD). The underlying molecular mechanisms implicated in these sex differences are not fully understood. The reasons for sex differences in CVD are definitely multifactorial, but major evidence points to the contribution of sex steroid hormone, 17β-estradiol (E2), and its receptors, estrogen receptor alpha (ERα) and estrogen receptor beta (ERβ). In this review, we summarize past and present studies that implicate E2 and ER as important determinants of sexual dimorphism in the physiology and pathophysiology of the heart. In particular, we give an overview of studies aimed to reveal the role of E2 and ER in the physiology of the observed sex differences in CVD using ER knock-out mice. Finally, we discuss recent findings from novel transgenic mouse models, which have provided new information on the sexual dimorphic roles of ER specifically in cardiomyocytes under pathological conditions.
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Affiliation(s)
- Elke Dworatzek
- Institut of Gender in Medicine and Center for Cardiovascular Research, Charitè-Universitaetsmedizin Berlin, Berlin, Germany; DZHK (German Center for Cardiovascular Research, partner site Berlin), Berlin, Germany
| | - Shokoufeh Mahmoodzadeh
- Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany; DZHK (German Center for Cardiovascular Research, partner site Berlin), Berlin, Germany.
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Wang H, Sun X, Chou J, Lin M, Ferrario CM, Zapata-Sudo G, Groban L. Cardiomyocyte-specific deletion of the G protein-coupled estrogen receptor (GPER) leads to left ventricular dysfunction and adverse remodeling: A sex-specific gene profiling analysis. Biochim Biophys Acta Mol Basis Dis 2016; 1863:1870-1882. [PMID: 27725247 DOI: 10.1016/j.bbadis.2016.10.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 09/13/2016] [Accepted: 10/02/2016] [Indexed: 12/21/2022]
Abstract
Activation of G protein-coupled estrogen receptor (GPER) by its agonist, G1, protects the heart from stressors such as pressure-overload, ischemia, a high-salt diet, estrogen loss, and aging, in various male and female animal models. Due to nonspecific effects of G1, the exact functions of cardiac GPER cannot be concluded from studies using systemic G1 administration. Moreover, global knockdown of GPER affects glucose homeostasis, blood pressure, and many other cardiovascular-related systems, thereby confounding interpretation of its direct cardiac actions. We generated a cardiomyocyte-specific GPER knockout (KO) mouse model to specifically investigate the functions of GPER in cardiomyocytes. Compared to wild type mice, cardiomyocyte-specific GPER KO mice exhibited adverse alterations in cardiac structure and impaired systolic and diastolic function, as measured by echocardiography. Gene deletion effects on left ventricular dimensions were more profound in male KO mice compared to female KO mice. Analysis of DNA microarray data from isolated cardiomyocytes of wild type and KO mice revealed sex-based differences in gene expression profiles affecting multiple transcriptional networks. Gene Set Enrichment Analysis (GSEA) revealed that mitochondrial genes are enriched in GPER KO females, whereas inflammatory response genes are enriched in GPER KO males, compared to their wild type counterparts of the same sex. The cardiomyocyte-specific GPER KO mouse model provides us with a powerful tool to study the functions of GPER in cardiomyocytes. The gene expression profiles of the GPER KO mice provide foundational information for further study of the mechanisms underlying sex-specific cardioprotection by GPER.
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MESH Headings
- Animals
- Female
- Gene Deletion
- Gene Expression Profiling
- Gene Expression Regulation
- Male
- Mice
- Mice, Knockout
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Receptors, Estrogen/genetics
- Receptors, Estrogen/metabolism
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/metabolism
- Sex Characteristics
- Ventricular Dysfunction, Left/genetics
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/pathology
- Ventricular Remodeling/genetics
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Affiliation(s)
- Hao Wang
- Department of Anesthesiology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157-1009, USA; Internal Medicine/Molecular Medicine, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USA.
| | - Xuming Sun
- Department of Anesthesiology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157-1009, USA
| | - Jeff Chou
- Public Health Sciences, Section on Biostatistical Sciences, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USA
| | - Marina Lin
- Department of Anesthesiology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157-1009, USA
| | - Carlos M Ferrario
- Department of Surgery, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USA; Department of Internal Medicine/Nephrology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USA
| | - Gisele Zapata-Sudo
- Department of Anesthesiology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157-1009, USA; Institute of Biomedical Sciences, Drug Development Program, Federal University of Rio de Janeiro, Brazil
| | - Leanne Groban
- Department of Anesthesiology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157-1009, USA; Internal Medicine/Molecular Medicine, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USA; Cardiovascular Research Center, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USA; Sticht Center on Aging, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, North Carolina 27157, USA.
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