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Estrogen treatment has positive effects on the skeleton, and we have shown that estrogen receptor alpha (ERα) expression in cells of hematopoietic origin contributes to a normal estrogen treatment response in bone tissue. T lymphocytes are implicated in the estrogenic regulation of bone mass, but it is not known whether T lymphocytes are direct estrogen target cells. Therefore, the aim of this study was to determine the importance of ERα expression in T lymphocytes for the estrogenic regulation of the skeleton using female mice lacking ERα expression specifically in T lymphocytes (Lck-ERα−/−) and ERαflox/flox littermate (control) mice. Deletion of ERα expression in T lymphocytes did not affect bone mineral density (BMD) in sham-operated Lck-ERα−/− compared to control mice, and ovariectomy (ovx) resulted in a similar decrease in BMD in control and Lck-ERα−/− mice compared to sham-operated mice. Furthermore, estrogen treatment of ovx Lck-ERα−/− led to an increased BMD that was indistinguishable from the increase seen after estrogen treatment of ovx control mice. Detailed analysis of both the appendicular (femur) and axial (vertebrae) skeleton showed that both trabecular and cortical bone parameters responded to a similar extent regardless of the presence of ERα in T lymphocytes. In conclusion, ERα expression in T lymphocytes is dispensable for normal estrogenic regulation of bone mass in female mice.
Faculty of Medical and Human Sciences, Faculty of Life Sciences, Faculty of Medical and Human Sciences, School of Medicine
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Faculty of Medical and Human Sciences, Faculty of Life Sciences, Faculty of Medical and Human Sciences, School of Medicine
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Introduction Glucocorticoids (GC) act through the GC receptor (GR), a member of the nuclear receptor superfamily of ligand-regulated transcription factors ( Hollenberg et al . 1985 , Weinberger et al . 1985 , 1987 , Perlmann & Evans 1997
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
Corcept Therapeutics, Menlo Park, CA, USA
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
Corcept Therapeutics, Menlo Park, CA, USA
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reference genes (RG) Hprt , GusB and Gapdh , as previously described ( Blažević et al. 2022 ). Microarray assay for real-time coregulator-nuclear receptor interaction GR-coregulator interactions were assessed in the presence of 1 µM cortisol
Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
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nuclear receptors ( Kroon et al. 2018 ). CORT125281 has beneficial effects in metabolic disease models, which is likely, in part, mediated via activation of brown adipose tissue (BAT) ( Kroon et al. 2018 ). In this study, we characterized the
Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
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Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
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Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
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Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Turku, Finland
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others) Ces2c, CYP2C18, Cyp3a25 (includes others), CYP3A5, CYP8B1 POR Enzyme 3.68E-11 Hsd3b4 (includes others) Aldh1a7, Ces2a, Ces2c, CYP2C18, CYP8B1, MSMO1, UGDH NR1I3 Ligand-dependent nuclear receptor 1.955 1.29 2.08E
Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
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Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
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Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
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Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
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the nuclear receptor (NR) family ( Tsai & O’Malley 1994 , Kininis & Kraus 2008 ). In addition, ERs may interfere with the signalling of other membrane receptors as well as intracellular receptors, and ERα, may associate with the plasma membrane and
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Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
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NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, UK
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Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
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nuclear receptors including the LXRs, GR, PXR and the retinoic acid receptor-related orphan receptors (RORs) ( Ma & Nelson 2019 ). In this regard, there is compelling evidence on the role of oxysterols as important mediators of metabolic syndrome
Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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with activation of hundreds of transcription factors including nuclear receptors such as PPARγ. We found that PPARγ expression was increased in embryonic calvarial osteo-progenitor cells from HFD-induced obese dams ( Fig. 2A ). To determine whether HFD
Medicine, Faculty of Life Sciences, Centre for Molecular
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Medicine, Faculty of Life Sciences, Centre for Molecular
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point, reporter gene assays, and provides additional reassurance that our real-time reporter gene approach authentically reports the underlying biological effect ( De Bosscher et al . 2005 ). Different molecular structures act on nuclear receptors to
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. The human HSD3B2 promoter can be activated by GATA4 and GATA6 and acts in concert with the nuclear receptor SF1 and liver receptor homolog 1 (LRH1) ( Martin et al. 2005 ). This suggests that GATA factors are key regulators of HSD3B2 and that