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Orlandi L, Rodriguez Y, Leostic A, Giraud C, Lang ML, Vialard F, Mauffré V, Motte-Signoret E. Preterm birth affects both surfactant synthesis and lung liquid resorption actors in fetal sheep. Dev Biol 2024; 506:64-71. [PMID: 38081502 DOI: 10.1016/j.ydbio.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/22/2023] [Accepted: 12/05/2023] [Indexed: 12/18/2023]
Abstract
INTRODUCTION After birth, the lungs must resorb the fluid they contain. This process involves multiple actors such as surfactant, aquaporins and ENaC channels. Preterm newborns often exhibit respiratory distress syndrome due to surfactant deficiency, and transitory tachypnea caused by a delay in lung liquid resorption. Our hypothesis is that surfactant, ENaC and aquaporins are involved in respiratory transition to extrauterine life and altered by preterm birth. We compared these candidates in preterm and term fetal sheeps. MATERIALS AND METHODS We performed cesarean sections in 8 time-dated pregnant ewes (4 at 100 days and 4 at 140 days of gestation, corresponding to 24 and 36 weeks of gestation in humans), and obtained 13 fetal sheeps in each group. We studied surfactant synthesis (SP-A, SP-B, SP-C), lung liquid resorption (ENaC, aquaporins) and corticosteroid regulation (glucocorticoid receptor, mineralocorticoid receptor and 11-betaHSD2) at mRNA and protein levels. RESULTS The mRNA expression level of SFTPA, SFTPB and SFTPC was higher in the term group. These results were confirmed at the protein level for SP-B on Western Blot analysis and for SP-A, SP-B and SP-C on immunohistochemical analysis. Regarding aquaporins, ENaC and receptors, mRNA expression levels for AQP1, AQP3, AQP5, ENaCα, ENaCβ, ENaCγ and 11βHSD2 mRNA were also higher in the term group. DISCUSSION Expression of surfactant proteins, aquaporins and ENaC increases between 100 and 140 days of gestation in an ovine model. Further exploring these pathways and their hormonal regulation could highlight some new explanations in the pathophysiology of neonatal respiratory diseases.
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Affiliation(s)
- Leona Orlandi
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France
| | - Yoann Rodriguez
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France
| | - Anne Leostic
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Poissy St Germain Hospital, Obstetrics and Gynaecology, Poissy, France
| | - Corinne Giraud
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France
| | - Maya-Laure Lang
- Poissy St Germain Hospital, Neonatal Intensive Care Unit, Poissy, France
| | - François Vialard
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Poissy St Germain Hospital, Genetics, Poissy, France
| | - Vincent Mauffré
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Ecole Nationale Vétérinaire d'Alfort, BREED, 94700, Maisons-Alfort, France
| | - Emmanuelle Motte-Signoret
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Poissy St Germain Hospital, Neonatal Intensive Care Unit, Poissy, France.
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Finkielstain GP, Rey RA. Challenges in managing disorders of sex development associated with adrenal dysfunction. Expert Rev Endocrinol Metab 2023; 18:427-439. [PMID: 37694439 DOI: 10.1080/17446651.2023.2256393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
INTRODUCTION Disorders of Sex Development (DSD) associated with adrenal dysfunction occur due to different defects in the proteins involved in gonadal and adrenal steroidogenesis. AREAS COVERED The deficiencies in 21-hydroxylase and 11β-hydroxylase lead to DSD in 46,XX patients, defects in StAR, P450scc, 17α-hydroxylase and 17,20-lyase lead to 46,XY DSD, and 3β-HSD2 and POR deficiencies cause both 46,XX and 46,XY DSD. Challenges in diagnosis arise from the low prevalence and the variability in serum steroid profiles. Replacement therapy with hydrocortisone and fludrocortisone helps to minimize life-threatening adrenal crises; however, availability is still an unresolved problem in many countries. Adverse health outcomes, due to the disease or its treatment, are common and include adult short stature, hypertension, osteoporosis, obesity, cardiometabolic risk, and reproductive health issues. Potential biomarkers to improve monitoring and novel treatment options that have been developed with the primary aim to decrease adrenal androgen production are promising tools to help improve the health and quality of life of these patients. EXPERT OPINION Steroid profiling by mass spectrometry and next-generation sequencing technologies represent useful tools for establishing an etiologic diagnosis and drive personalized management. Nonetheless, access to health care still remains an issue requiring urgent solutions in many resource-limited settings.
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Affiliation(s)
- Gabriela P Finkielstain
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE), CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
| | - Rodolfo A Rey
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE), CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
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Viengchareun S, Pussard E, Castanet M, Sachs LM, Vu TA, Boileau P, Lombès M, Martinerie L. The invention of aldosterone, how the past resurfaces in pediatric endocrinology. Mol Cell Endocrinol 2021; 535:111375. [PMID: 34197901 DOI: 10.1016/j.mce.2021.111375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 12/23/2022]
Abstract
Sodium and water homeostasis are drastically modified at birth, in mammals, by the transition from aquatic life to terrestrial life. Accumulating evidence during the past ten years underscores the central role for the mineralocorticoid signaling pathway, in the fine regulation of this equilibrium, at this critical period of development. Interestingly, regarding evolution, while the mineralocorticoid receptor is expressed in fish, the appearance of its related ligand, aldosterone, coincides with terrestrial life, as it is first detected in lungfish and amphibian. Thus, aldosterone is likely one of the main hormones regulating the transition from an aquatic environment to an air environment. This review will focus on the different actors of the mineralocorticoid signaling pathway from aldosterone secretion in the adrenal gland, to mineralocorticoid receptor expression in the kidney, summarizing their regulation and roles throughout fetal and neonatal development, in the light of evolution.
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Affiliation(s)
- Say Viengchareun
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, 94276, Le Kremlin-Bicêtre, France
| | - Eric Pussard
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, 94276, Le Kremlin-Bicêtre, France; Service de Génétique Moléculaire, Pharmacogénétique et Hormonologie, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, 94275, Le Kremlin Bicêtre, France
| | - Mireille Castanet
- Normandie Univ, UNIROUEN, Inserm U1239, CHU Rouen, Department of Pediatrics, F-76000, Rouen, France
| | - Laurent M Sachs
- UMR 7221 Molecular Physiology and Adaption, Department Adaptation of Life, Centre National de La Recherche Scientifique, Muséum National d'Histoire Naturelle, Paris, France
| | - Thi An Vu
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, 94276, Le Kremlin-Bicêtre, France
| | - Pascal Boileau
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, 94276, Le Kremlin-Bicêtre, France; Department of Neonatal Pediatrics, Centre Hospitalier Intercommunal de Poissy-Saint-Germain, 10, Rue du Champ Gaillard 78300 Poissy France; Université Paris-Saclay, UVSQ, 78180, Montigny-Le-Bretonneux, France
| | - Marc Lombès
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, 94276, Le Kremlin-Bicêtre, France
| | - Laetitia Martinerie
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, 94276, Le Kremlin-Bicêtre, France; Université de Paris, 75019, Paris, France; Pediatric Endocrinology Department, AP-HP, Hôpital Universitaire Robert-Debre, 75019, Paris, France.
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Laulhé M, Dumeige L, Vu TA, Hani I, Pussard E, Lombès M, Viengchareun S, Martinerie L. Sexual Dimorphism of Corticosteroid Signaling during Kidney Development. Int J Mol Sci 2021; 22:ijms22105275. [PMID: 34069759 PMCID: PMC8155845 DOI: 10.3390/ijms22105275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/07/2021] [Accepted: 05/10/2021] [Indexed: 12/24/2022] Open
Abstract
Sexual dimorphism involves differences between biological sexes that go beyond sexual characteristics. In mammals, differences between sexes have been demonstrated regarding various biological processes, including blood pressure and predisposition to develop hypertension early in adulthood, which may rely on early events during development and in the neonatal period. Recent studies suggest that corticosteroid signaling pathways (comprising glucocorticoid and mineralocorticoid signaling pathways) have distinct tissue-specific expression and regulation during this specific temporal window in a sex-dependent manner, most notably in the kidney. This review outlines the evidence for a gender differential expression and activation of renal corticosteroid signaling pathways in the mammalian fetus and neonate, from mouse to human, that may favor mineralocorticoid signaling in females and glucocorticoid signaling in males. Determining the effects of such differences may shed light on short term and long term pathophysiological consequences, markedly for males.
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Affiliation(s)
- Margaux Laulhé
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
| | - Laurence Dumeige
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
- Pediatric Endocrinology Department, Hôpital Universitaire Robert Debre, France & Université de Paris, 75019 Paris, France
| | - Thi An Vu
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
| | - Imene Hani
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
| | - Eric Pussard
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
- Service de Génétique Moléculaire, Pharmacogénétique et Hormonologie, Hôpital de Bicêtre, Assistance Publique-Hôpitaux de Paris, 94275 Le Kremlin-Bicêtre, France
| | - Marc Lombès
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
| | - Say Viengchareun
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
| | - Laetitia Martinerie
- Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, CEDEX, 94276 Le Kremlin-Bicêtre, France; (M.L.); (L.D.); (T.A.V.); (I.H.); (E.P.); (M.L.); (S.V.)
- Pediatric Endocrinology Department, Hôpital Universitaire Robert Debre, France & Université de Paris, 75019 Paris, France
- Correspondence:
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Chae M, Bae IH, Lim S, Jung K, Roh J, Kim W. AP Collagen Peptides Prevent Cortisol-Induced Decrease of Collagen Type I in Human Dermal Fibroblasts. Int J Mol Sci 2021; 22:ijms22094788. [PMID: 33946465 PMCID: PMC8125628 DOI: 10.3390/ijms22094788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 11/16/2022] Open
Abstract
Cortisol is an endogenous glucocorticoid (GC) and primary stress hormone that regulates a wide range of stress responses in humans. The adverse effects of cortisol on the skin have been extensively documented but the underlying mechanism of cortisol-induced signaling is still unclear. In the present study, we investigate the effect of cortisol on collagen type I expression and the effect of AP collagen peptides, collagen tripeptide-rich hydrolysates containing 3% glycine-proline- hydroxyproline (Gly-Pro-Hyp, GPH) from the fish skin, on the cortisol-mediated inhibition of collagen type I and the cortisol-induced signaling that regulates collagen type I production in human dermal fibroblasts (HDFs). We determine that cortisol downregulates the expression of collagen type I. AP collagen peptides or GC receptor (GR) inhibitors recover the cortisol-mediated inhibition of collagen type I and GR activation. AP collagen peptides or GR inhibitors also prevent the cortisol-dependent inhibition of transforming growth factor (TGF)-β signaling. AP collagen peptides or GR inhibitors are effective in the prevention of collagen type I inhibition mediated by cortisol in senescent HDFs and reconstituted human skin models. Taken together, GR signaling might be responsible for the cortisol-mediated inhibition of TGF-β. AP collagen peptides act as GR-mediated signaling blockers, preventing the cortisol-dependent inhibition of collagen type I. Therefore, AP collagen peptides have the potential to improve skin health.
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Yang F, Chang Y, Zhang C, Xiong Y, Wang X, Ma X, Wang Z, Li H, Shimosawa T, Pei L, Xu Q. UUO induces lung fibrosis with macrophage-myofibroblast transition in rats. Int Immunopharmacol 2021; 93:107396. [PMID: 33540244 DOI: 10.1016/j.intimp.2021.107396] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 01/11/2021] [Accepted: 01/11/2021] [Indexed: 12/11/2022]
Abstract
Progression of chronic kidney disease (CKD) to uremia is often accompanied by varying degrees of lung damage and this is also an important cause of death. Although there are many studies on the mechanism of lung injury, it is not clearly understood. Inflammatory macrophages may associated with fibrosis in the lungs. Here, we investigated the role of macrophage-myofibroblast transition (MMT) in lung fibrosis with unilateral ureteral obstruction (UUO) rats. We found that cells undergoing MMT accounted for an important part of the myofibroblast population, and correlated with lung fibrosis, MMT cells in lungs have a predominant M2 phenotype, and this process was attenuated after treatment with eplerenone. In conclusion, our studies provide a possible mechanism for UUO-induced kidney damage and lung injury, indicating the possibility of using eplerenone, a mineralocorticoid receptor blocker, to treat UUO to reduce kidney damage and protect lung function.
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Affiliation(s)
- Fan Yang
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China; Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Institute of Integrative Medicine, College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Yi Chang
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China; Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Institute of Integrative Medicine, College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Cuijuan Zhang
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Yunzhao Xiong
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Xiangting Wang
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China; Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Institute of Integrative Medicine, College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Xuelian Ma
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China; Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Institute of Integrative Medicine, College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Zheng Wang
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Hui Li
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Tatsuo Shimosawa
- Department of Clinical Laboratory, School of Medicine, International University of Health and Welfare, Narita, Chiba 108-8329, Japan
| | - Lin Pei
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China; Hebei Province Academy of Chinese Medicine Sciences, Shijiazhuang 050031, China.
| | - Qingyou Xu
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China; Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Institute of Integrative Medicine, College of Integrative Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, China.
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Baker ME, Katsu Y. Progesterone: An enigmatic ligand for the mineralocorticoid receptor. Biochem Pharmacol 2020; 177:113976. [PMID: 32305433 DOI: 10.1016/j.bcp.2020.113976] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/10/2020] [Indexed: 12/21/2022]
Abstract
The progesterone receptor (PR) mediates progesterone regulation of female reproductive physiology, as well as gene transcription in non-reproductive tissues, such as brain, bone, lung and vasculature, in both women and men. An unusual property of progesterone is its high affinity for the mineralocorticoid receptor (MR), which regulates electrolyte transport in the kidney in humans and other terrestrial vertebrates. In humans, rats, alligators and frogs, progesterone antagonizes activation of the MR by aldosterone, the physiological mineralocorticoid in terrestrial vertebrates. In contrast, in elephant shark, ray-finned fishes and chickens, progesterone activates the MR. Interestingly, cartilaginous fishes and ray-finned fishes do not synthesize aldosterone, raising the question of which steroid(s) activate the MR in cartilaginous fishes and ray-finned fishes. The simpler synthesis of progesterone, compared to cortisol and other corticosteroids, makes progesterone a candidate physiological activator of the MR in elephant sharks and ray-finned fishes. Elephant shark and ray-finned fish MRs are expressed in diverse tissues, including heart, brain and lung, as well as, ovary and testis, two reproductive tissues that are targets for progesterone, which together suggests a multi-faceted physiological role for progesterone activation of the MR in elephant shark and ray-finned fish. The functional consequences of progesterone as an antagonist of some terrestrial vertebrate MRs and as an agonist of fish and chicken MRs are not fully understood. The physiological activities of progesterone through binding to vertebrate MRs merits further investigation.
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Affiliation(s)
- Michael E Baker
- Division of Nephrology-Hypertension, Department of Medicine, 0735, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0735, United States.
| | - Yoshinao Katsu
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan.
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Duodenal web masquerading as pseudohypoaldosteronism of infancy. JOURNAL OF CLINICAL AND TRANSLATIONAL ENDOCRINOLOGY CASE REPORTS 2020. [DOI: 10.1016/j.jecr.2020.100056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Travers S, Bouvattier C, Fagart J, Martinerie L, Viengchareun S, Pussard E, Lombès M. Interaction between accumulated 21-deoxysteroids and mineralocorticoid signaling in 21-hydroxylase deficiency. Am J Physiol Endocrinol Metab 2020; 318:E102-E110. [PMID: 31821037 DOI: 10.1152/ajpendo.00368.2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
21-Hydroxylase deficiency (21OHD) is a rare genetic disorder in which salt-wasting syndrome occurs in 75% of cases, due to inability to synthesize cortisol and aldosterone. Recent mass spectrometry progress allowed identification of 21-deoxysteroids, i.e., 17-hydroxyprogesterone (17OHP), 21-deoxycortisol (21DF), and 21-deoxycorticosterone (21DB). We hypothesized that they may interfere with mineralocorticoid signaling and fludrocortisone therapy in patients with congenital adrenal hyperplasia (CAH) without effective glucocorticoid replacement and ACTH suppression. Our goal was to quantify circulating 21-deoxysteroids in a pediatric cohort with CAH related to 21OHD and to examine their impact on mineralocorticoid receptor (MR) activation. Twenty-nine patients with salt-wasting phenotype were classified in two groups according to their therapeutic control. During routine follow-up, 17OHP, 21DF, 21DB, and cortisol levels were quantified by liquid chromatography with tandem mass spectrometry before hydrocortisone intake and 1 and 2.5 h following treatment administration. Luciferase reporter gene assays were performed on transfected HEK293T cells while in silico modeling examined structural interactions between these steroids within ligand-binding domain of MR. Plasma 17OHP, 21DF, and 21DB accumulate in uncontrolled patients reaching micromolar concentrations even after hydrocortisone intake. 21DF and 21DB act as partial MR agonists with antagonist features similar to 17OHP, consistent with altered anchoring to Asn770 and unfavorable contact with Ala773 in ligand-binding pocket of MR. Our results demonstrate a complex interaction between all accumulating 21-deoxysteroids in uncontrolled 21OHD patients and mineralocorticoid signaling and suggest that appropriate steroid profiling should optimize management and follow-up of such patients, as keeping those steroids to low plasma levels should attest therapeutic efficacy and prevent interference with MR signaling.
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Affiliation(s)
- Simon Travers
- Institut National de la Santé et de la Recherche Médicale, Le Kremlin-Bicêtre, France
- Fac Med Paris-Sud, Université Paris-Sud, Université Paris Saclay, Le Kremlin-Bicêtre, France
- Département d'Endocrinologie Pédiatrique, Hôpital de Bicêtre, Hôpitaux Universitaires Paris Sud, Assistance Publique-Hôpitaux de Paris, Le Kremlin Bicêtre, France
| | - Claire Bouvattier
- Centre de Référence des Maladies Rares du Développement Génital (DEVGEN), Le Kremlin Bicêtre, France
- Service d'Endocrinologie Pédiatrique, Hôpital Robert Debré, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Jérôme Fagart
- Institut National de la Santé et de la Recherche Médicale, Le Kremlin-Bicêtre, France
- Fac Med Paris-Sud, Université Paris-Sud, Université Paris Saclay, Le Kremlin-Bicêtre, France
| | - Laetitia Martinerie
- Institut National de la Santé et de la Recherche Médicale, Le Kremlin-Bicêtre, France
- Fac Med Paris-Sud, Université Paris-Sud, Université Paris Saclay, Le Kremlin-Bicêtre, France
- Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Say Viengchareun
- Institut National de la Santé et de la Recherche Médicale, Le Kremlin-Bicêtre, France
- Fac Med Paris-Sud, Université Paris-Sud, Université Paris Saclay, Le Kremlin-Bicêtre, France
| | - Eric Pussard
- Institut National de la Santé et de la Recherche Médicale, Le Kremlin-Bicêtre, France
- Fac Med Paris-Sud, Université Paris-Sud, Université Paris Saclay, Le Kremlin-Bicêtre, France
- Département d'Endocrinologie Pédiatrique, Hôpital de Bicêtre, Hôpitaux Universitaires Paris Sud, Assistance Publique-Hôpitaux de Paris, Le Kremlin Bicêtre, France
| | - Marc Lombès
- Institut National de la Santé et de la Recherche Médicale, Le Kremlin-Bicêtre, France
- Fac Med Paris-Sud, Université Paris-Sud, Université Paris Saclay, Le Kremlin-Bicêtre, France
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Iughetti L, Lucaccioni L, Bruzzi P, Ciancia S, Bigi E, Madeo SF, Predieri B, Roucher-Boulez F. Isolated hypoaldosteronism as first sign of X-linked adrenal hypoplasia congenita caused by a novel mutation in NR0B1/DAX-1 gene: a case report. BMC MEDICAL GENETICS 2019; 20:98. [PMID: 31164167 PMCID: PMC6549270 DOI: 10.1186/s12881-019-0834-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 05/23/2019] [Indexed: 11/10/2022]
Abstract
Background X-linked Adrenal Hypoplasia Congenita (AHC) is a rare cause of primary adrenal insufficiency due to mutations in the NR0B1 gene, causing a loss of function of the nuclear receptor protein DAX-1. Adrenal insufficiency usually appears in the first 2 months of life, but can sometimes emerge during childhood. Hypogonadotropic Hypogonadism is often associated later in life and patients may develop azoospermia. We describe an unusual onset of AHC started with isolated hypoaldosteronism as first and only sign of the disease. Case presentation A 18-days-old newborn presented with failure to thrive and feeding difficulties. Blood tests showed severe hyponatremia, hyperkalemia and hypochloremia. Renin was found over the measurable range and aldosterone was low whereas cortisol level was normal with a slightly increased ACTH. In the suspicion of Primary Hypoaldosteronism, correction of plasmatic electrolytes and replacement therapy with Fludrocortisone were promptly started. The subsequent evidence of low plasmatic and urinary cortisol and increased ACTH required the start of Hydrocortisone replacement therapy and it defined a clinical picture of adrenal insufficiency. Genetic analysis demonstrated a novel mutation in the DAX-1 gene leading to the diagnosis of AHC. Conclusions AHC onset may involve the aldosterone production itself, miming an isolated defect of aldosterone synthesis. NR0B1/DAX-1 mutations should be considered in male infants presenting with isolated hypoaldosteronism as first sign of adrenal insufficiency.
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Affiliation(s)
- Lorenzo Iughetti
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy.
| | - Laura Lucaccioni
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy
| | - Patrizia Bruzzi
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy
| | - Silvia Ciancia
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy
| | - Elena Bigi
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy
| | - Simona Filomena Madeo
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy
| | - Barbara Predieri
- Pediatric Unit, Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo n. 71, 41124, Modena, Italy
| | - Florence Roucher-Boulez
- Laboratoire de Biochimie et Biologie Moléculaire Grand Est, UM Pathologies Endocriniennes Rénales Musculaires et Mucoviscidose, Groupement Hospitalier Est, Hospices Civils de Lyon, Univ Lyon, Université Claude Bernard Lyon 1, Lyon, France
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11
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Katsu Y, Kohno S, Oka K, Lin X, Otake S, Pillai NE, Takagi W, Hyodo S, Venkatesh B, Baker ME. Transcriptional activation of elephant shark mineralocorticoid receptor by corticosteroids, progesterone, and spironolactone. Sci Signal 2019; 12:12/584/eaar2668. [DOI: 10.1126/scisignal.aar2668] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The mineralocorticoid receptor (MR) is a nuclear receptor and part of a large and diverse family of transcription factors that also includes receptors for glucocorticoids, progesterone, androgens, and estrogens. The corticosteroid aldosterone is the physiological activator of the MR in humans and other terrestrial vertebrates; however, its activator is not known in cartilaginous fish, the oldest group of extant jawed vertebrates. Here, we analyzed the ability of corticosteroids and progesterone to activate the full-length MR from the elephant shark (Callorhinchus milii). On the basis of their measured activities, aldosterone, cortisol, 11-deoxycorticosterone, corticosterone, 11-deoxcortisol, progesterone, and 19-norprogesterone are potential physiological mineralocorticoids. However, aldosterone, the physiological mineralocorticoid in humans and other terrestrial vertebrates, is not found in cartilaginous or ray-finned fish. Although progesterone activates MRs in ray-finned fish, progesterone does not activate MRs in humans, amphibians, or alligator, suggesting that during the transition to terrestrial vertebrates, progesterone lost the ability to activate the MR. Both elephant shark MR and human MR are expressed in the brain, heart, ovary, testis, and other nonepithelial tissues, suggesting that MR expression in diverse tissues evolved in the common ancestor of jawed vertebrates. Our data suggest that 19-norprogesterone– and progesterone-activated MR may have unappreciated functions in reproductive physiology.
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12
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Seccia TM, Caroccia B, Gomez-Sanchez EP, Gomez-Sanchez CE, Rossi GP. The Biology of Normal Zona Glomerulosa and Aldosterone-Producing Adenoma: Pathological Implications. Endocr Rev 2018; 39:1029-1056. [PMID: 30007283 PMCID: PMC6236434 DOI: 10.1210/er.2018-00060] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 07/03/2018] [Indexed: 01/09/2023]
Abstract
The identification of several germline and somatic ion channel mutations in aldosterone-producing adenomas (APAs) and detection of cell clusters that can be responsible for excess aldosterone production, as well as the isolation of autoantibodies activating the angiotensin II type 1 receptor, have rapidly advanced the understanding of the biology of primary aldosteronism (PA), particularly that of APA. Hence, the main purpose of this review is to discuss how discoveries of the last decade could affect histopathology analysis and clinical practice. The structural remodeling through development and aging of the human adrenal cortex, particularly of the zona glomerulosa, and the complex regulation of aldosterone, with emphasis on the concepts of zonation and channelopathies, will be addressed. Finally, the diagnostic workup for PA and its subtyping to optimize treatment are reviewed.
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Affiliation(s)
- Teresa M Seccia
- Department of Medicine-DIMED, University of Padua, Padua PD, Italy
| | | | - Elise P Gomez-Sanchez
- Department of Pharmacology and Toxicology, G.V. (Sonny) Montgomery VA Medical Center, Jackson, Mississippi
| | - Celso E Gomez-Sanchez
- Division of Endocrinology, G.V. (Sonny) Montgomery VA Medical Center, Jackson, Mississippi.,University of Mississippi Medical Center, Jackson, Mississippi
| | - Gian Paolo Rossi
- Department of Medicine-DIMED, University of Padua, Padua PD, Italy
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13
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Baker ME, Lathe R. The promiscuous estrogen receptor: Evolution of physiological estrogens and response to phytochemicals and endocrine disruptors. J Steroid Biochem Mol Biol 2018; 184:29-37. [PMID: 30009950 DOI: 10.1016/j.jsbmb.2018.07.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 06/25/2018] [Accepted: 07/03/2018] [Indexed: 01/03/2023]
Abstract
Many actions of estradiol (E2), the principal physiological estrogen in vertebrates, are mediated by estrogen receptor-α (ERα) and ERβ. An important physiological feature of vertebrate ERs is their promiscuous response to several physiological steroids, including estradiol (E2), Δ5-androstenediol, 5α-androstanediol, and 27-hydroxycholesterol. A novel structural characteristic of Δ5-androstenediol, 5α-androstanediol, and 27-hydroxycholesterol is the presence of a C19 methyl group, which precludes the presence of an aromatic A ring with a C3 phenolic group that is a defining property of E2. The structural diversity of these estrogens can explain the response of the ER to synthetic chemicals such as bisphenol A and DDT, which disrupt estrogen physiology in vertebrates, and the estrogenic activity of a variety of plant-derived chemicals such as genistein, coumestrol, and resveratrol. Diversity in the A ring of physiological estrogens also expands potential structures of industrial chemicals that can act as endocrine disruptors. Compared to E2, synthesis of 27-hydroxycholesterol and Δ5-androstenediol is simpler, leading us, based on parsimony, to propose that one or both of these steroids or a related metabolite was a physiological estrogen early in the evolution of the ER, with E2 assuming this role later as the canonical estrogen. In addition to the well-studied role of the ER in reproductive physiology, the ER also is an important transcription factor in non-reproductive tissues such as the cardiovascular system, kidney, bone, and brain. Some of these ER actions in non-reproductive tissues appeared early in vertebrate evolution, long before the emergence of mammals.
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Affiliation(s)
- Michael E Baker
- Division of Nephrology-Hypertension, Department of Medicine, 0693, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0693, USA.
| | - Richard Lathe
- Division of Infection and Pathway Medicine, University of Edinburgh, Little France, Edinburgh, UK.
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14
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Katsu Y, Oka K, Baker ME. Evolution of human, chicken, alligator, frog, and zebrafish mineralocorticoid receptors: Allosteric influence on steroid specificity. Sci Signal 2018; 11:11/537/eaao1520. [DOI: 10.1126/scisignal.aao1520] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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15
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Sevilla LM, Pérez P. Roles of the Glucocorticoid and Mineralocorticoid Receptors in Skin Pathophysiology. Int J Mol Sci 2018; 19:ijms19071906. [PMID: 29966221 PMCID: PMC6073661 DOI: 10.3390/ijms19071906] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 06/25/2018] [Accepted: 06/27/2018] [Indexed: 12/15/2022] Open
Abstract
The nuclear hormone receptor (NR) superfamily comprises approximately 50 evolutionarily conserved proteins that play major roles in gene regulation by prototypically acting as ligand-dependent transcription factors. Besides their central role in physiology, NRs have been largely used as therapeutic drug targets in many chronic inflammatory conditions and derivatives of their specific ligands, alone or in combination, are frequently prescribed for the treatment of skin diseases. In particular, glucocorticoids (GCs) are the most commonly used compounds for treating prevalent skin diseases such as psoriasis due to their anti-proliferative and anti-inflammatory actions. However, and despite their therapeutic efficacy, the long-term use of GCs is limited because of the cutaneous adverse effects including atrophy, delayed wound healing, and increased susceptibility to stress and infections. The GC receptor (GR/NR3C1) and the mineralocorticoid receptor (MR/NR3C2) are members of the NR subclass NR3C that are highly related, both structurally and functionally. While the GR is ubiquitously expressed and is almost exclusively activated by GCs; an MR has a more restricted tissue expression pattern and can bind GCs and the mineralocorticoid aldosterone with similar high affinity. As these receptors share 95% identity in their DNA binding domains; both can recognize the same hormone response elements; theoretically resulting in transcriptional regulation of the same target genes. However, a major mechanism for specific activation of GRs and/or MRs is at the pre-receptor level by modulating the local availability of active GCs. Furthermore, the selective interactions of each receptor with spatio-temporally regulated transcription factors and co-regulators are crucial for the final transcriptional outcome. While there are abundant genome wide studies identifying GR transcriptional targets in a variety of tissue and cell types; including keratinocytes; the data for MR is more limited thus far. Our group and others have studied the role of GRs and MRs in skin development and disease by generating and characterizing mouse and cellular models with gain- and loss-of-function for each receptor. Both NRs are required for skin barrier competence during mouse development and also play a role in adult skin homeostasis. Moreover, the combined loss of epidermal GRs and MRs caused a more severe skin phenotype relative to single knock-outs (KOs) in developing skin and in acute inflammation and psoriasis, indicating that these corticosteroid receptors play cooperative roles. Understanding GR- and MR-mediated signaling in skin should contribute to deciphering their tissue-specific relative roles and ultimately help to improve GC-based therapies.
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Affiliation(s)
- Lisa M Sevilla
- Instituto de Biomedicina de Valencia (IBV)-CSIC, 46010 Valencia, Spain.
| | - Paloma Pérez
- Instituto de Biomedicina de Valencia (IBV)-CSIC, 46010 Valencia, Spain.
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16
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Epidermal glucocorticoid and mineralocorticoid receptors act cooperatively to regulate epidermal development and counteract skin inflammation. Cell Death Dis 2018; 9:588. [PMID: 29789551 PMCID: PMC5964110 DOI: 10.1038/s41419-018-0673-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 12/14/2022]
Abstract
Endogenous and synthetic glucocorticoids (GCs) regulate epidermal development and combat skin inflammatory diseases. GC actions can be mediated through the GC receptor (GR) and/or the mineralocorticoid receptor (MR), highly homologous ligand-activated transcription factors. While the role of GR as a potent anti-inflammatory mediator is well known, that of MR is not as clear, nor is whether these receptors cooperate or antagonize each other in the epidermis. To address this, we generated mice with epidermal-specific loss of both receptors (double knockout, DKO), and analyzed the phenotypical and functional consequences relative to single KOs or controls (CO). At birth, DKO epidermis displayed a phenotype of defective differentiation and inflammation, which was more severe than in either single KO, featuring neutrophil-containing infiltrates, and gene dysregulation characteristic of human psoriatic lesions. This phenotype resolved spontaneously. However, in adulthood, single or combined loss of GC receptors increased susceptibility to inflammation and hyperproliferation triggered by phorbol ester which, different to CO, was not effectively counteracted by GC treatment. Also, DKOs were more susceptible to imiquimod-induced psoriasis than CO showing severe defective epidermal differentiation and microabcesses while single KOs showed an intermediate response. Immortalized DKO keratinocytes featured increased proliferation kinetics and reduced cell size, a unique phenotype relative to single KO cells. The lack of GR and MR in keratinocytes, individual or combined, caused constitutive increases in p38 and ERK activities, which were partially reversed upon reinsertion of receptors into DKO cells. DKO keratinocytes also displayed significant increases in AP-1 and NF-κB transcriptional activities, which were partially rescued by ERK and p38 inhibition, respectively. Reinsertion of GR and MR in DKO keratinocytes resulted in physical and cooperative functional interactions that restored the transcriptional response to GCs. In conclusion, our data have revealed that epidermal GR and MR act cooperatively to regulate epidermal development and counteract skin inflammation.
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17
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Gkikas D, Tsampoula M, Politis PK. Nuclear receptors in neural stem/progenitor cell homeostasis. Cell Mol Life Sci 2017; 74:4097-4120. [PMID: 28638936 PMCID: PMC11107725 DOI: 10.1007/s00018-017-2571-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/06/2017] [Accepted: 06/13/2017] [Indexed: 12/13/2022]
Abstract
In the central nervous system, embryonic and adult neural stem/progenitor cells (NSCs) generate the enormous variety and huge numbers of neuronal and glial cells that provide structural and functional support in the brain and spinal cord. Over the last decades, nuclear receptors and their natural ligands have emerged as critical regulators of NSC homeostasis during embryonic development and adult life. Furthermore, substantial progress has been achieved towards elucidating the molecular mechanisms of nuclear receptors action in proliferative and differentiation capacities of NSCs. Aberrant expression or function of nuclear receptors in NSCs also contributes to the pathogenesis of various nervous system diseases. Here, we review recent advances in our understanding of the regulatory roles of steroid, non-steroid, and orphan nuclear receptors in NSC fate decisions. These studies establish nuclear receptors as key therapeutic targets in brain diseases.
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Affiliation(s)
- Dimitrios Gkikas
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Matina Tsampoula
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Panagiotis K Politis
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece.
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18
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Host Response Comparison of H1N1- and H5N1-Infected Mice Identifies Two Potential Death Mechanisms. Int J Mol Sci 2017; 18:ijms18081631. [PMID: 28749409 PMCID: PMC5578021 DOI: 10.3390/ijms18081631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/12/2017] [Accepted: 07/20/2017] [Indexed: 12/20/2022] Open
Abstract
Highly pathogenic influenza A viruses (IAV) infections represent a serious threat to humans due to their considerable morbidity and mortality capacities. A good understanding of the molecular mechanisms responsible for the acute lung injury observed during this kind of infection is essential to design adapted therapies. In the current study, using an unbiased transcriptomic approach, we compared the host-responses of mice infected with two different subtypes of IAV: H1N1 vs. H5N1. The host-response comparison demonstrated a clear difference between the transcriptomic profiles of H1N1- and H5N1-infected mice despite identical survival kinetics and similar viral replications. The ontological analysis of the two transcriptomes showed two probable causes of death: induction of an immunopathological state of the lung for the H1N1 strain vs. development of respiratory dysfunction in the case of the H5N1 IAV. Finally, a clear signature responsible for lung edema was specifically associated with the H5N1 infection. We propose a potential mechanism of edema development based on predictive bioinformatics tools.
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19
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Baker ME, Katsu Y. 30 YEARS OF THE MINERALOCORTICOID RECEPTOR: Evolution of the mineralocorticoid receptor: sequence, structure and function. J Endocrinol 2017; 234:T1-T16. [PMID: 28468932 DOI: 10.1530/joe-16-0661] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 05/03/2017] [Indexed: 12/14/2022]
Abstract
The mineralocorticoid receptor (MR) is descended from a corticoid receptor (CR), which has descendants in lamprey and hagfish, cyclostomes (jawless fish), a taxon that evolved at the base of the vertebrate line. A distinct MR and GR first appear in cartilaginous fishes (Chondrichthyes), such as sharks, skates, rays and chimeras. Skate MR has a strong response to corticosteroids that are mineralocorticoids and glucocorticoids in humans. The half-maximal responses (EC50s) for skate MR for the mineralocorticoids aldosterone and 11-deoxycorticosterone are 0.07 nM and 0.03 nM, respectively. EC50s for the glucocorticoids cortisol and corticosterone are 1 nM and 0.09 nM, respectively. The physiological mineralocorticoid in ray-finned fish, which do not synthesize aldosterone, is not fully understood because several 3-ketosteroids, including cortisol, 11-deoxycortisol, corticosterone, 11-deoxycorticosterone and progesterone are transcriptional activators of fish MR. Further divergence of the MR and GR in terrestrial vertebrates, which synthesize aldosterone, led to emergence of aldosterone as a selective ligand for the MR. Here, we combine sequence analysis of the CR and vertebrate MRs and GRs, analysis of crystal structures of human MR and GR and data on transcriptional activation by 3-ketosteroids of wild-type and mutant MRs and GRs to investigate the evolution of selectivity for 3-ketosteroids by the MR in terrestrial vertebrates and ray-finned fish, as well as the basis for binding of some glucocorticoids by human MR and other vertebrate MRs.
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Affiliation(s)
- Michael E Baker
- Division of Nephrology-HypertensionDepartment of Medicine, University of California, San Diego, CA, USA
| | - Yoshinao Katsu
- Graduate School of Life ScienceHokkaido University, Sapporo, Japan
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20
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Mooij CF, Webb EA, Claahsen van der Grinten HL, Krone N. Cardiovascular health, growth and gonadal function in children and adolescents with congenital adrenal hyperplasia. Arch Dis Child 2017; 102:578-584. [PMID: 27974295 DOI: 10.1136/archdischild-2016-311910] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/21/2016] [Indexed: 11/04/2022]
Abstract
After the introduction of replacement therapy with glucocorticoids and mineralocorticoids in the 1950s, congenital adrenal hyperplasia (CAH) is no longer a life-limiting condition. However, due to the successful introduction of medical steroid hormone replacement, CAH has become a chronic condition, with associated comorbidities and long-term health implications. The aim of treatment is the replacement of mineralocorticoids and glucocorticoids and the normalisation of elevated androgen concentrations. Long-term consequences of the condition and current treatment regimens include unfavourable changes in the cardiovascular risk profile, impaired growth, testicular adrenal rest tumours (TART) in male and subfertility in both male and female patients with CAH. Optimising replacement therapy in patients with CAH remains challenging. On one hand, treatment with supraphysiological doses of glucocorticoids might be required to normalise androgen concentrations and decrease size or presence of TARTs. On the other hand, treatment with supraphysiological doses of glucocorticoids is associated with an increased prevalence of unfavourable cardiovascular and metabolic risk profiles as well as impaired longitudinal growth and gonadal function. Therefore, treatment of children and adults with CAH requires an individualised approach. Careful monitoring for early signs of complications is already warranted during paediatric healthcare provision to prevent and reduce the impact of comorbidities in later life.
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Affiliation(s)
- Christiaan F Mooij
- Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, University of Birmingham, Birmingham, UK.,Department of Paediatric Endocrinology, Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Emma A Webb
- Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, University of Birmingham, Birmingham, UK
| | - Hedi L Claahsen van der Grinten
- Department of Paediatric Endocrinology, Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nils Krone
- Academic Unit of Child Health, Department of Oncology and Metabolism, University of Sheffield, Sheffield Children's Hospital, Sheffield, UK
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21
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Bizzarri C, Pedicelli S, Cappa M, Cianfarani S. Water Balance and 'Salt Wasting' in the First Year of Life: The Role of Aldosterone-Signaling Defects. Horm Res Paediatr 2017; 86:143-153. [PMID: 27598420 DOI: 10.1159/000449057] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/10/2016] [Indexed: 11/19/2022] Open
Abstract
In newborns and infants, dehydration and salt wasting represent a relatively common cause of admission to hospital and may result in life-threatening complications. Kidneys are responsible for electrolyte homoeostasis, but neonatal kidneys show low glomerular filtration rate and immaturity of the distal nephron, leading to reduced ability to concentrate urine. High extrarenal fluid losses often contribute to the increased occurrence of electrolyte disorders. Aldosterone is essential for sodium retention in the kidney, salivary glands, sweat glands and colon. A partial and transient aldosterone resistance is present in newborns and infants, thus reducing the capability of maintaining sodium balance in specific pathological conditions. The present review examines the mechanisms making infants more susceptible to salt wasting. Peculiar aspects of renal physiology in the first year of life and management of electrolyte disorders (i.e. sodium and potassium) are considered. Finally, inherited disorders associated with neonatal salt wasting are examined in detail. © 2016 S. Karger AG, Basel.
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Affiliation(s)
- Carla Bizzarri
- Unit of Endocrinology and Diabetes, 'Bambino Gesù' Children's Hospital, Rome, Italy
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22
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Sex-Specificity of Mineralocorticoid Target Gene Expression during Renal Development, and Long-Term Consequences. Int J Mol Sci 2017; 18:ijms18020457. [PMID: 28230786 PMCID: PMC5343990 DOI: 10.3390/ijms18020457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 01/30/2017] [Accepted: 02/09/2017] [Indexed: 12/15/2022] Open
Abstract
Sex differences have been identified in various biological processes, including hypertension. The mineralocorticoid signaling pathway is an important contributor to early arterial hypertension, however its sex-specific expression has been scarcely studied, particularly with respect to the kidney. Basal systolic blood pressure (SBP) and heart rate (HR) were measured in adult male and female mice. Renal gene expression studies of major players of mineralocorticoid signaling were performed at different developmental stages in male and female mice using reverse transcription quantitative PCR (RT-qPCR), and were compared to those of the same genes in the lung, another mineralocorticoid epithelial target tissue that regulates ion exchange and electrolyte balance. The role of sex hormones in the regulation of these genes was also investigated in differentiated KC3AC1 renal cells. Additionally, renal expression of the 11 β-hydroxysteroid dehydrogenase type 2 (11βHSD2) protein, a regulator of mineralocorticoid specificity, was measured by immunoblotting and its activity was indirectly assessed in the plasma using liquid-chromatography coupled to mass spectrometry in tandem (LC-MSMS) method. SBP and HR were found to be significantly lower in females compared to males. This was accompanied by a sex- and tissue-specific expression profile throughout renal development of the mineralocorticoid target genes serum and glucocorticoid-regulated kinase 1 (Sgk1) and glucocorticoid-induced leucine zipper protein (Gilz), together with Hsd11b2, Finally, the implication of sex hormones in this sex-specific expression profile was demonstrated in vitro, most notably for Gilz mRNA expression. We demonstrate a tissue-specific, sex-dependent and developmentally-regulated pattern of expression of the mineralocorticoid pathway that could have important implications in physiology and pathology.
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23
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Dubinsky TJ, Moshiri M, Adams Waldorf K, Wilson G, Maki JH, Hippe DS. Increased fetal lung T2 signal is not due to increasing surfactant concentration: an in vitro T2 mapping analysis. Prenat Diagn 2017; 37:211-214. [PMID: 27987213 DOI: 10.1002/pd.4987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/04/2016] [Accepted: 12/09/2016] [Indexed: 11/09/2022]
Abstract
OBJECT The aim of this study was to perform in vitro T2 mapping of serial dilutions of pharmaceutical surfactant. MATERIALS AND METHODS Magnetic resonance imaging. Magnetic resonance scanning was performed on serial dilutions of surfactant on large bore clinical magnets at a field strength of 1.5 T Philips and 3.0 T (Achieva TX, Philips Healthcare, the Netherlands). RESULTS The curves demonstrate a small increasing trend between surfactant concentration and R2 (shortened T2's), with a 7.3% increase in R2 for each doubling of surfactant concentration (95% confidence interval: 6.1-8.6%, p < 0.001). CONCLUSIONS The increasing lung/liver T2 signal ratio seen in fetal lungs with increasing gestational age is not due to increasing surfactant concentration. © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
| | - Mariam Moshiri
- Department of Radiology, University of Washington, Seattle, WA, USA
| | | | - Greg Wilson
- Department of Radiology, University of Washington, Seattle, WA, USA
| | - Jeffrey H Maki
- Department of Radiology, University of Washington, Seattle, WA, USA
| | - Daniel S Hippe
- Department of Radiology, University of Washington, Seattle, WA, USA
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24
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Jelin BA, Sun W, Kravets A, Naboka M, Stepanova EI, Vdovenko VY, Karmaus WJ, Lichosherstov A, Svendsen ER. Quantifying annual internal effective 137Cesium dose utilizing direct body-burden measurement and ecological dose modeling. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2016; 26:546-553. [PMID: 25757885 DOI: 10.1038/jes.2015.6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 12/19/2014] [Accepted: 12/27/2014] [Indexed: 06/04/2023]
Abstract
The Chernobyl Nuclear Power Plant (CNPP) accident represents one of the most significant civilian releases of 137Cesium (137Cs, radiocesium) in human history. In the Chernobyl-affected region, radiocesium is considered to be the greatest on-going environmental hazard to human health by radiobiologists and public health scientists. The goal of this study was to characterize dosimetric patterns and predictive factors for whole-body count (WBC)-derived radiocesium internal dose estimations in a CNPP-affected children's cohort, and cross-validate these estimations with a soil-based ecological dose estimation model. WBC data were used to estimate the internal effective dose using the International Commission on Radiological Protection (ICRP) 67 dose conversion coefficient for 137Cs and MONDAL Version 3.01 software. Geometric mean dose estimates from each model were compared utilizing paired t-tests and intra-class correlation coefficients. Additionally, we developed predictive models for WBC-derived dose estimation in order to determine the appropriateness of EMARC to estimate dose for this population. The two WBC-derived dose predictive models identified 137Cs soil concentration (P<0.0001) as the strongest predictor of annual internal effective dose from radiocesium validating the use of the soil-based EMARC model. The geometric mean internal effective dose estimate of the EMARC model (0.183 mSv/y) was the highest followed by the ICRP 67 dose estimates (0.165 mSv/y) and the MONDAL model estimates (0.149 mSv/y). All three models yielded significantly different geometric mean dose (P<0.05) estimates for this cohort when stratified by sex, age at time of exam and season of exam, except for the mean MONDAL and EMARC estimates for 15- and 16-year olds and mean ICRP and MONDAL estimates for children examined in Winter. Further prospective and retrospective radio-epidemiological studies utilizing refined WBC measurements and ecological model dose estimations, in conjunction with findings from animal toxicological studies, should help elucidate possible deterministic radiogenic health effects associated with chronic low-dose internal exposure to 137Cs.
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Affiliation(s)
- Benjamin A Jelin
- Department of Global Environmental Health Sciences: Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, USA
| | - Wenjie Sun
- Department of Global Environmental Health Sciences: Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, USA
| | - Alexandra Kravets
- Institue of Cell Biology and Genetic Engineering, National Academy of Sciences, Kyiv, Ukraine
| | - Maryna Naboka
- Radioecological Center, Ukrainian National Academy of Sciences, Kyiv, Ukraine
| | - Eugenia I Stepanova
- Research Center for Radiation Medicine, Academy of Medical Sciences of Ukraine, Kyiv, Ukraine
| | - Vitaliy Y Vdovenko
- Research Center for Radiation Medicine, Academy of Medical Sciences of Ukraine, Kyiv, Ukraine
| | - Wilfried J Karmaus
- Division of Epidemiology, Biostatistics and Environmental Health, School of Public Health, University of Memphis, Memphis, Tennessee, USA
| | - Alex Lichosherstov
- Radioecological Center, Ukrainian National Academy of Sciences, Kyiv, Ukraine
| | - Erik R Svendsen
- Department of Global Environmental Health Sciences: Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, USA
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Corticosteroid and progesterone transactivation of mineralocorticoid receptors from Amur sturgeon and tropical gar. Biochem J 2016; 473:3655-3665. [DOI: 10.1042/bcj20160579] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/12/2016] [Indexed: 01/23/2023]
Abstract
The response to a panel of steroids by the mineralocorticoid receptor (MR) from Amur sturgeon and tropical gar, two basal ray-finned fish, expressed in HEK293 cells was investigated. Half-maximal responses (EC50s) for transcriptional activation of sturgeon MR by 11-deoxycorticosterone, corticosterone, 11-deoxycortisol, cortisol and aldosterone, and progesterone (Prog) were between 13 and 150 pM. For gar MR, EC50s were between 8 and 55 pM. Such low EC50s support physiological regulation by these steroids of the MR in sturgeon and gar. Companion studies with human and zebrafish MRs found higher EC50s compared with EC50s for sturgeon and gar MRs, with EC50s for zebrafish MR closer to gar and sturgeon MRs than was human MR. For zebrafish MR, EC50s were between 75 and 740 pM; for human MR, EC50s were between 65 pM and 2 nM. In addition to Prog, spironolactone (spiron) and 19nor-progesterone (19norP) were agonists for all three fish MRs, in contrast with their antagonist activity for human MR, which is hypothesized to involve serine-810 in human MR because all three steroids are agonists for a mutant human Ser810Leu-MR. Paradoxically, sturgeon, gar, and zebrafish MRs contain a serine corresponding to serine-810 in human MR. Our data suggest alternative mechanism(s) for Prog, spiron, and 19norP as MR agonists in these three ray-finned fishes and the need for caution in applying data for Prog signaling in zebrafish to human physiology.
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Katsu Y, Kohno S, Oka K, Baker ME. Evolution of corticosteroid specificity for human, chicken, alligator and frog glucocorticoid receptors. Steroids 2016; 113:38-45. [PMID: 27317937 DOI: 10.1016/j.steroids.2016.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 05/25/2016] [Accepted: 06/12/2016] [Indexed: 12/31/2022]
Abstract
We investigated the evolution of the response of human, chicken, alligator and frog glucocorticoid receptors (GRs) to dexamethasone, cortisol, cortisone, corticosterone, 11-deoxycorticosterone, 11-deoxycortisol and aldosterone. We find significant differences among these vertebrates in the transcriptional activation of their full length GRs by these steroids, indicating that there were changes in the specificity of the GR for steroids during the evolution of terrestrial vertebrates. To begin to study the role of interactions between different domains on the GR in steroid sensitivity and specificity for terrestrial GRs, we investigated transcriptional activation of truncated GRs containing their hinge domain and ligand binding domain (LBD) fused to a GAL4 DNA binding domain (GAL4-DBD). Compared to corresponding full length GRs, transcriptional activation of GAL4-DBD_GR-hinge/LBD constructs required higher steroid concentrations and displayed altered steroid specificity, indicating that interactions between the hinge/LBD and other domains are important in glucocorticoid activation of these terrestrial GRs.
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Affiliation(s)
- Yoshinao Katsu
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan; Department of Biological Sciences, Hokkaido University, Sapporo, Japan.
| | - Satomi Kohno
- Department of Obstetrics and Gynecology, Medical University of South Carolina, and Marine Biomedicine and Environmental Science Center, Hollings Marine Laboratory, Charleston, SC, USA
| | - Kaori Oka
- Graduate School of Life Science, Hokkaido University, Sapporo, Japan
| | - Michael E Baker
- Department of Medicine, University of California, San Diego, CA, USA.
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Epidermal Mineralocorticoid Receptor Plays Beneficial and Adverse Effects in Skin and Mediates Glucocorticoid Responses. J Invest Dermatol 2016; 136:2417-2426. [PMID: 27464843 DOI: 10.1016/j.jid.2016.07.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 06/30/2016] [Accepted: 07/11/2016] [Indexed: 12/20/2022]
Abstract
Glucocorticoids (GCs) regulate skin homeostasis and combat cutaneous inflammatory diseases; however, adverse effects of chronic GC treatments limit their therapeutic use. GCs bind and activate the GC receptor and the mineralocorticoid receptor (MR), transcription factors that recognize identical hormone responsive elements. Whether epidermal MR mediates beneficial or deleterious GC effects is of great interest for improving GC-based skin therapies. MR epidermal knockout mice exhibited increased keratinocyte proliferation and differentiation and showed resistance to GC-induced epidermal thinning. However, crucially, loss of epidermal MR rendered mice more sensitive to inflammatory stimuli and skin damage. MR epidermal knockout mice showed increased susceptibility to phorbol 12-myristate 13-acetate-induced inflammation with higher cytokine induction. Likewise, cultured MR epidermal knockout keratinocytes had increased phorbol 12-myristate 13-acetate-induced NF-κB activation, highlighting an anti-inflammatory function for MR. GC-induced transcription was reduced in MR epidermal knockout keratinocytes, at least partially due to decreased recruitment of GC receptor to hormone responsive element-containing sequences. Our results support a role for epidermal MR in adult skin homeostasis and demonstrate nonredundant roles for MR and GC receptor in mediating GC actions.
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Mani O, Nashev LG, Livelo C, Baker ME, Odermatt A. Role of Pro-637 and Gln-642 in human glucocorticoid receptors and Ser-843 and Leu-848 in mineralocorticoid receptors in their differential responses to cortisol and aldosterone. J Steroid Biochem Mol Biol 2016; 159:31-40. [PMID: 26907965 DOI: 10.1016/j.jsbmb.2016.02.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 02/11/2016] [Accepted: 02/18/2016] [Indexed: 10/22/2022]
Abstract
Mineralocorticoid receptors (MR) and glucocorticoid receptors (GR) are descended from a common ancestral corticoid receptor. The basis for specificities of human MR for aldosterone and human GR for glucocorticoids, such as cortisol, bearing 17α-hydroxyl-groups, is incompletely understood. Differences in MR at S843 and L848 and GR at the corresponding P637 and Q642 have been proposed as important in their different responses to glucocorticoids with 17α-hydroxyl-groups. We investigated the impact of these residues on binding affinity (Ki) and transcriptional activation (EC50) of mutants MR-S843P, MR-L848Q and MR-S843P/L848Q and mutants GR-P637S, GR-Q642L and GR-P637S/Q642L in the presence of different corticosteroids. Aldosterone, cortisol and corticosterone had similar affinities for wild-type MR and all mutants, while dexamethasone had increased affinity for the three mutants. However, transactivation of MR-S843P and MR-S843P/L848Q by all four steroids was significantly lower than for wild-type MR. In contrast, transactivation of MR-L848Q tended to be 3-fold higher for cortisol and corticosterone and increased 7-fold for dexamethasone, indicating that MR-L848Q has an increased response to glucocorticoids, while retaining a strong response to aldosterone. Compared to wild-type GR, GR-P637S and GR-Q642L had increased affinities and significantly increased transcriptional activity with aldosterone and corticosterone, and GR-P637S had similar transcriptional activity with cortisol and dexamethasone, while GR-Q642L and GR-P637S/Q642L had a significant decrease in transcriptional activity with cortisol and dexamethasone. 3D-models of these MR and GR mutants revealed that dexamethasone and aldosterone, respectively, fit nicely into the steroid-binding pocket, consistent with the affinity of dexamethasone for MR mutants and aldosterone for GR mutants.
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Affiliation(s)
- Orlando Mani
- Division of Molecular and Systems Toxicology, Department of Pharmaceutical Sciences, Pharmacenter, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Lyubomir G Nashev
- Division of Molecular and Systems Toxicology, Department of Pharmaceutical Sciences, Pharmacenter, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Christopher Livelo
- Department of Medicine, 0693, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Michael E Baker
- Department of Medicine, 0693, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States.
| | - Alex Odermatt
- Division of Molecular and Systems Toxicology, Department of Pharmaceutical Sciences, Pharmacenter, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland.
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Abstract
Stress is an integral part of life. Activation of the hypothalamus-pituitary-adrenal (HPA) axis in the adult can be viewed as mostly adaptive to restore homeostasis in the short term. When stress occurs during development, and specifically during periods of vulnerability in maturing systems, it can significantly reprogram function, leading to pathologies in the adult. Thus, it is critical to understand how the HPA axis is regulated during developmental periods and what are the factors contributing to shape its activity and reactivity to environmental stressors. The HPA axis is not a passive system. It can actively participate in critical physiological regulation, inducing parturition in the sheep for instance or being a center stage actor in the preparation of the fetus to aerobic life (lung maturation). It is also a major player in orchestrating mental function, metabolic, and cardiovascular function often reprogrammed by stressors even prior to conception through epigenetic modifications of gametes. In this review, we review the ontogeny of the HPA axis with an emphasis on two species that have been widely studied-sheep and rodents-because they each share many similar regulatory mechanism applicable to our understanding of the human HPA axis. The studies discussed in this review should ultimately inform us about windows of susceptibility in the developing brain and the crucial importance of early preconception, prenatal, and postnatal interventions designed to improve parental competence and offspring outcome. Only through informed studies will our public health system be able to curb the expansion of many stress-related or stress-induced pathologies and forge a better future for upcoming generations.
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Affiliation(s)
- Charles E Wood
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, Florida, USA
| | - Claire-Dominique Walker
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, Quebec, Canada
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Baker ME, Nelson DR, Studer RA. Origin of the response to adrenal and sex steroids: Roles of promiscuity and co-evolution of enzymes and steroid receptors. J Steroid Biochem Mol Biol 2015; 151:12-24. [PMID: 25445914 DOI: 10.1016/j.jsbmb.2014.10.020] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 10/13/2014] [Accepted: 10/26/2014] [Indexed: 01/14/2023]
Abstract
Many responses to adrenal and sex steroids are mediated by receptors that belong to the nuclear receptor family of transcription factors. We investigated the co-evolution of these vertebrate steroid receptors and the enzymes that synthesize adrenal and sex steroids through data mining of genomes from cephalochordates [amphioxus], cyclostomes [lampreys, hagfish], chondrichthyes [sharks, rays, skates], actinopterygii [ray-finned fish], sarcopterygii [coelacanths, lungfishes and terrestrial vertebrates]. An ancestor of the estrogen receptor and 3-ketosteroid receptors evolved in amphioxus. A corticoid receptor and a progesterone receptor evolved in cyclostomes, and an androgen receptor evolved in gnathostomes. Amphioxus contains CYP11, CYP17, CYP19, 3β/Δ5-4-HSD and 17β-HSD14, which suffice for the synthesis of estradiol and Δ5-androstenediol. Amphioxus also contains CYP27, which catalyzes the synthesis of 27-hydroxy-cholesterol, another estrogen. Lamprey contains, in addition, CYP21, which catalyzes the synthesis of 11-deoxycortisol. Chondrichthyes contain, in addition, CYP11A, CYP11C, CYP17A1, CYP17A2. Coelacanth also contains CYP11C1, the current descendent from a common ancestor with modern land vertebrate CYP11B genes, which catalyze the synthesis of cortisol, corticosterone and aldosterone. Interestingly, CYP11B2, aldosterone synthase, evolved from separate gene duplications in at least old world monkeys and two suborders of rodents. Sciurognathi (including mice and rats) and Hystricomorpha (including guinea pigs). Thus, steroid receptors and steroidogenic enzymes co-evolved at key transitions in the evolution of vertebrates. Together, this suite of receptors and enzymes through their roles in transcriptional regulation of reproduction, development, homeostasis and the response to stress contributed to the evolutionary diversification of vertebrates. This article is part of a Special Issue entitled 'Steroid/Sterol signaling'.
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Affiliation(s)
- Michael E Baker
- Department of Medicine, 0693, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0693, United States.
| | - David R Nelson
- Department of Microbiology, Immunology and Biochemistry, 858 Madison Ave., Suite G01, University of Tennessee, Memphis, TN 38163, United States.
| | - Romain A Studer
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK.
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Boucher E, Provost PR, Tremblay Y. C21-steroids inactivation and glucocorticoid synthesis in the developing lung. J Steroid Biochem Mol Biol 2015; 147:70-80. [PMID: 25434283 DOI: 10.1016/j.jsbmb.2014.11.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 11/05/2014] [Accepted: 11/25/2014] [Indexed: 10/24/2022]
Abstract
Glucocorticoids (GCs) are important regulators of lung development. The genes normally involved in GC synthesis in adrenals are co-expressed with 20α-hydroxysteroid dehydrogenase (20α-HSD) in the developing lung. In this study, C21-steroid metabolism was investigated in fetal and postnatal mouse lungs. Incubation of [(3)H]-progesterone with lung explant cultures of different perinatal developmental time points revealed two different (antenatal vs. postnatal) complex metabolization patterns. Progesterone inactivation was predominant. 20αOH-derivatives were more abundant after birth and some metabolites were 5α-reduced. Using [(3)H]-progesterone as substrate, corticosterone synthesis was only observed in a fraction of lung explants from gestation day (GD) 15.5. Neither aldosterone synthase nor P450c17 activity was observed. With epithelial-enriched primary cell cultures, deoxycorticosterone synthesis from [(3)H]-progesterone was observed. With lung explants incubated with [(3)H]-corticosterone as substrate, [(3)H]-4-pregnen-21-ol-3,11,20-trione (11-dehydrocorticosterone), the product of 11β-HSD2, accumulated in higher proportion on GD 15.5 than at later developmental time points. The temporal correlation observed between levels of progesterone inactivation by 20α-HSD (higher after birth) and the sensitivity of lung development to GCs suggests a role for 20α-HSD in the modulation of GR occupancy through the control of 21-hydroxylase substrate and product levels. In conclusion, the developing lung is characterized by effective inactivation of c21-steroids by 20α-HSD. The formation of active GCs from the "adrenal"-like pathway was observed with some lung explants and primary epithelial cell cultures. Coexistence of this GC synthesis pathway with 20α-HSD activity strongly suggests local regulation of GC action and is compatible with intracrine/paracrine actions of GC.
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Affiliation(s)
- Eric Boucher
- Reproduction, Mother and Youth Health, Centre de recherche du CHU de Québec, Québec, QC, Canada; Centre de Recherche en Biologie de la Reproduction (CRBR), Faculty of Medicine, Laval University, Québec, QC, Canada
| | - Pierre R Provost
- Reproduction, Mother and Youth Health, Centre de recherche du CHU de Québec, Québec, QC, Canada; Department of Obstetrics/Gynecology & Reproduction, Faculty of Medicine, Laval University, Québec, QC, Canada; Centre de Recherche en Biologie de la Reproduction (CRBR), Faculty of Medicine, Laval University, Québec, QC, Canada
| | - Yves Tremblay
- Reproduction, Mother and Youth Health, Centre de recherche du CHU de Québec, Québec, QC, Canada; Department of Obstetrics/Gynecology & Reproduction, Faculty of Medicine, Laval University, Québec, QC, Canada; Centre de Recherche en Biologie de la Reproduction (CRBR), Faculty of Medicine, Laval University, Québec, QC, Canada.
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ter Heegde F, De Rijk RH, Vinkers CH. The brain mineralocorticoid receptor and stress resilience. Psychoneuroendocrinology 2015; 52:92-110. [PMID: 25459896 DOI: 10.1016/j.psyneuen.2014.10.022] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/23/2014] [Accepted: 10/27/2014] [Indexed: 12/11/2022]
Abstract
Stress exposure activates the HPA-axis and results in the release of corticosteroids which bind to two receptor types in the brain: the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR). While the role of the GR in stress reactivity has been extensively studied, the MR has received less attention. Nevertheless, pioneering in-depth studies over the past two decades have shown the importance of the brain MR in the processing of stressful information. Moreover, a membrane-bound MR mediating the rapid effects of cortisol was recently discovered. This review summarizes how the MR may play a role in stress resilience. Both preclinical and clinical studies suggest that the MR is an important stress modulator and influences basal as well as stress-induced HPA-axis activity, stress appraisal, and fear-related memories. These MR effects are mediated by both genomic and non-genomic MRs and appear to be at least partially sex-dependent. Moreover, the majority of studies indicate that high MR functionality or expression may confer resilience to traumatic stress. This has direct clinical implications. First, increasing activity or expression of brain MRs may prevent or reverse symptoms of stress-related depression. Second, individuals with a relatively low MR functionality may possess an increased stress susceptibility for depression. Nevertheless, the number of clinical MR studies is currently limited. In conclusion, the recent emergence of the MR as a putative stress resilience factor is important and may open up new avenues for the prevention and treatment of psychiatric disorders.
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Affiliation(s)
- Freija ter Heegde
- Department of Psychiatry, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Roel H De Rijk
- Department of Psychiatry, Leiden University Medical Center, Leiden, The Netherlands; Department of Clinical Psychology, Leiden, The Netherlands
| | - Christiaan H Vinkers
- Department of Psychiatry, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands.
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Le Menuet D, Lombès M. The neuronal mineralocorticoid receptor: from cell survival to neurogenesis. Steroids 2014; 91:11-9. [PMID: 24928721 DOI: 10.1016/j.steroids.2014.05.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 04/18/2014] [Accepted: 05/28/2014] [Indexed: 02/07/2023]
Abstract
Mineralocorticoid receptor (MR), a hormone-activated transcription factor belonging to the nuclear receptor superfamily, exerts widespread actions in many tissues such as tight epithelia, the cardiovascular system, adipose tissues and macrophages. In the mammalian brain, MR is present in the limbic areas where it is highly expressed in neurons of the hippocampus and mostly absent in other regions while the glucocorticoid receptor (GR) expression is ubiquitous. MR binds both aldosterone and glucocorticoids, the latter having a ten-fold higher affinity for MR than for the closely related GR. However, owing to the minimal aldosterone transfer across the blood brain barrier and the absence of neuronal 11β hydroxysteroid dehydrogenase type 2 as an intracellular gate-keeper, neuronal MR appears to be fully occupied even at low physiological glucocorticoid levels while GR activation only occurs at high glucocorticoid concentrations, i.e. at the peak of the circadian rhythm or under stress. This defined a one hormone/two receptors system that works in balance, modulating a large spectrum of actions in the central nervous system. MR and GR are involved in the stress responses, the regulation of neuron excitability, long term potentiation, neuroprotection and neurogenesis in the dentate gyrus. MR thus constitutes a key factor in the arising of higher cognitive functions such as memorization, learning and mood. This review presents an overview of various roles of MR in the central nervous system which are somewhat less studied than that of GR, in the light of recent data obtained using cellular models, animal models and clinical investigations.
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Affiliation(s)
- Damien Le Menuet
- Inserm U693, Le Kremlin-Bicêtre F-94276, France; Univ Paris-Sud, Faculté de Médecine Paris-Sud, UMR-S693, Le Kremlin-Bicêtre F-94276, France.
| | - Marc Lombès
- Inserm U693, Le Kremlin-Bicêtre F-94276, France; Univ Paris-Sud, Faculté de Médecine Paris-Sud, UMR-S693, Le Kremlin-Bicêtre F-94276, France; Assistance Publique-Hôpitaux de Paris, Hôpital de Bicêtre, Service d'Endocrinologie et des Maladies de la Reproduction, Le Kremlin Bicêtre F-94275, France
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Gomez-Sanchez EP. Brain mineralocorticoid receptors in cognition and cardiovascular homeostasis. Steroids 2014; 91:20-31. [PMID: 25173821 PMCID: PMC4302001 DOI: 10.1016/j.steroids.2014.08.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 07/10/2014] [Accepted: 08/04/2014] [Indexed: 12/20/2022]
Abstract
Mineralocorticoid receptors (MR) mediate diverse functions supporting osmotic and hemodynamic homeostasis, response to injury and inflammation, and neuronal changes required for learning and memory. Inappropriate MR activation in kidneys, heart, vessels, and brain hemodynamic control centers results in cardiovascular and renal pathology and hypertension. MR binds aldosterone, cortisol and corticosterone with similar affinity, while the glucocorticoid receptor (GR) has less affinity for cortisol and corticosterone. As glucocorticoids are more abundant than aldosterone, aldosterone activates MR in cells co-expressing enzymes with 11β-hydroxydehydrogenase activity to inactivate them. MR and GR co-expressed in the same cell interact at the molecular and functional level and these functions may be complementary or opposing depending on the cell type. Thus the balance between MR and GR expression and activation is crucial for normal function. Where 11β-hydroxydehydrogenase 2 (11β-HSD2) that inactivates cortisol and corticosterone in aldosterone target cells of the kidney and nucleus tractus solitarius (NTS) is not expressed, as in most neurons, MR are activated at basal glucocorticoid concentrations, GR at stress concentrations. An exception may be pre-autonomic neurons of the PVN which express MR and 11β-HSD1 in the absence of hexose-6-phosphate dehydrogenase required to generate the requisite cofactor for reductase activity, thus it acts as a dehydrogenase. MR antagonists, valuable adjuncts to the treatment of cardiovascular disease, also inhibit MR in the brain that are crucial for memory formation and exacerbate detrimental effects of excessive GR activation on cognition and mood. 11β-HSD1 inhibitors combat metabolic and cognitive diseases related to glucocorticoid excess, but may exacerbate MR action where 11β-HSD1 acts as a dehydrogenase, while non-selective 11β-HSD1&2 inhibitors cause injurious disruption of MR hemodynamic control. MR functions in the brain are multifaceted and optimal MR:GR activity is crucial. Therefore selectively targeting down-stream effectors of MR specific actions may be a better therapeutic goal.
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Affiliation(s)
- Elise P Gomez-Sanchez
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA.
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Abstract
Classical effects of mineralocorticoids include stimulation of Na(+) reabsorption and K(+) secretion in the kidney and other epithelia including colon and several glands. Moreover, mineralocorticoids enhance the excretion of Mg(2+) and renal tubular H(+) secretion. The renal salt retention following mineralocorticoid excess leads to extracellular volume expansion and hypertension. The increase of blood pressure following mineralocorticoid excess is, however, not only the result of volume expansion but may result from stiff endothelial cell syndrome impairing the release of vasodilating nitric oxide. Beyond that, mineralocorticoids are involved in the regulation of a wide variety of further functions, including cardiac fibrosis, platelet activation, neuronal function and survival, inflammation as well as vascular and tissue fibrosis and calcification. Those functions are briefly discussed in this short introduction to the special issue. Beyond that, further contributions of this special issue amplify on mineralocorticoid-induced sodium appetite and renal salt retention, the role of mineralocorticoids in the regulation of acid-base balance, the involvement of aldosterone and its receptors in major depression, the mineralocorticoid stimulation of inflammation and tissue fibrosis and the effect of aldosterone on osteoinductive signaling and vascular calcification. Clearly, still much is to be learned about the various ramifications of mineralocorticoid-sensitive physiology and pathophysiology.
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Affiliation(s)
- Florian Lang
- Department of Physiology, Eberhard Karls University of Tübingen, Tübingen, Germany
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De Mello WC. Regulation of cell volume and water transport--an old fundamental role of the renin angiotensin aldosterone system components at the cellular level. Peptides 2014; 58:74-7. [PMID: 24945466 PMCID: PMC7172966 DOI: 10.1016/j.peptides.2014.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/03/2014] [Accepted: 06/03/2014] [Indexed: 12/12/2022]
Abstract
The expression and the role of renin angiotensin aldosterone system (RAAS) components on regulation of cell volume and water transport on vertebrates and invertebrates were reviewed. The presence of these components even in simple organisms like leeches and their relevance for the control of cellular volume and water transport supports the view that the expression of these components, at cellular level, is an acquisition which was preserved throughout evolution.
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Affiliation(s)
- Walmor C De Mello
- School of Medicine, Medical Sciences Campus, UPR, San Juan, PR 00936, USA.
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McCartney J, Richards EM, Wood CE, Keller-Wood M. Mineralocorticoid effects in the late gestation ovine fetal lung. Physiol Rep 2014; 2:2/7/e12066. [PMID: 25347852 PMCID: PMC4187571 DOI: 10.14814/phy2.12066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
This study was designed to determine the effects of corticosteroids at MR in the late‐gestation fetal lung. Since both the mineralocorticoid receptor (MR) and the glucocorticoid receptor (GR) are expressed at relatively high levels in the fetal lung, endogenous corticosteroids may act at MR as well as GR in the preterm fetal lung. The GR agonist, betamethasone, the MR agonist, aldosterone, or both were infused intravenously for 48 h in ovine fetuses of approximately 130 days gestation. Effects on airway pressures during stepwise inflation of the in situ lung, expression of ENaC alpha (SCNN1A), ENaC beta (SCNN1B), and Na,K ATPase (ATP1A1), and elastin and collagen content were determined after the infusions. We found that aldosterone significantly reduced the airway pressure measured during the initial step in inflation of the lung, although aldosterone had no overall effect on lung compliance, nor did aldosterone induce expression of ENaCα, ENaCβ or Na,K ATPaseα1. Betamethasone significantly increased expression of the epithelial sodium channel (ENaC) subunit mRNAs, and collagen and elastin content in the lungs, although this dose of betamethasone also had no effect on lung compliance. There was no synergy between effects of the MR and GR agonists. Transcriptomic analysis suggested that although aldosterone did not alter genes in pathways related to epithelial sodium transport, aldosterone did alter genes in pathways involved in cell proliferation in the lungs. The results are consistent with corticosteroid‐induced fluid reabsorption at birth through GR rather than MR, but suggest that MR facilitates lung maturation, and may contribute to inflation with the first breaths via mechanisms distinct from known aldosterone effects in other epithelia. Infusion of the mineralocorticoid receptor agonist, aldosterone, to the ovine fetus resulted in reduced airway pressures with initial lung inflation. However, aldosterone did not alter lung surfactant or epithelial sodium transport genes which are classical MR gene targets. Transcriptomic analysis revealed an aldosterone effect on genes related to cell cycle, suggesting that MR have a role distinct form that of GR in the maturing lung.
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Affiliation(s)
- Jarret McCartney
- Department of Pharmacodynamics, University of Florida, Gainesville, Florida, USA Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida, USA
| | - Elaine M Richards
- Department of Pharmacodynamics, University of Florida, Gainesville, Florida, USA
| | - Charles E Wood
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida, USA
| | - Maureen Keller-Wood
- Department of Pharmacodynamics, University of Florida, Gainesville, Florida, USA Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida, USA
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O’Hara B, de la Rosa DA, Rajendran VM. Multiple mineralocorticoid response elements localized in different introns regulate intermediate conductance K+ (Kcnn4) channel expression in the rat distal colon. PLoS One 2014; 9:e98695. [PMID: 24901797 PMCID: PMC4047071 DOI: 10.1371/journal.pone.0098695] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 05/07/2014] [Indexed: 01/05/2023] Open
Abstract
An elevated plasma aldosterone and an increased expression of the intermediate conductance K+ (IK/Kcnn4) channels are linked in colon. This observation suggests that the expression of Kcnn4 gene is controlled through the action of aldosterone on its cognate receptor (i.e., mineralocorticoid receptor; MR). In order to establish this, we performed chromatin immunoprecipitation (ChIP) assay to identify the MR response elements (MREs) in a region that spanned 20 kb upstream and 10 kb downstream of the presumed transcription start site (TSS) using chromatin from the colonic epithelial cells of normal and aldosterone-treated rats. MREs were immunoprecipitated in an approximately 5 kb region that spanned the first and second introns in the aldosterone rats. These regions were individually cloned in luciferase-expression vector lacking enhancer activity. These clones were tested for enhancer activity in vitro by transfecting in HEK293T and CaCo2 cells with MR and aldosterone treatment. At least four regions were found to be responsive to the MR and aldosterone. Two regions were identified to contain MREs using bioinformatics tools. These clones lost their enhancer activity after mutation of the presumptive MREs, and thus, established the functionality of the MREs. The third and fourth clones did not contain any bioinformatically obvious MREs. Further, they lost their activity upon additional sub-cloning, which suggest cooperativity between the regions that were separated upon sub-cloning. These results demonstrate the presence of intronic MREs in Kcnn4 and suggest a highly cooperative interaction between multiple intronic response elements.
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Affiliation(s)
- Bryan O’Hara
- Department of Biochemistry, West Virginia University School of Medicine, Morgantown, West Virginia, United States of America
| | | | - Vazhaikkurichi M. Rajendran
- Department of Biochemistry, West Virginia University School of Medicine, Morgantown, West Virginia, United States of America
- * E-mail:
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Baker ME, Hardiman G. Transcriptional analysis of endocrine disruption using zebrafish and massively parallel sequencing. J Mol Endocrinol 2014; 52:R241-56. [PMID: 24850832 PMCID: PMC4145605 DOI: 10.1530/jme-13-0219] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Endocrine-disrupting chemicals (EDCs), including plasticizers, pesticides, detergents, and pharmaceuticals, affect a variety of hormone-regulated physiological pathways in humans and wildlife. Many EDCs are lipophilic molecules and bind to hydrophobic pockets in steroid receptors, such as the estrogen receptor and androgen receptor, which are important in vertebrate reproduction and development. Indeed, health effects attributed to EDCs include reproductive dysfunction (e.g. reduced fertility, reproductive tract abnormalities, and skewed male:female sex ratios in fish), early puberty, various cancers, and obesity. A major concern is the effects of exposure to low concentrations of endocrine disruptors in utero and post partum, which may increase the incidence of cancer and diabetes in adults. EDCs affect transcription of hundreds and even thousands of genes, which has created the need for new tools to monitor the global effects of EDCs. The emergence of massive parallel sequencing for investigating gene transcription provides a sensitive tool for monitoring the effects of EDCs on humans and other vertebrates, as well as elucidating the mechanism of action of EDCs. Zebrafish conserve many developmental pathways found in humans, which makes zebrafish a valuable model system for studying EDCs, especially on early organ development because their embryos are translucent. In this article, we review recent advances in massive parallel sequencing approaches with a focus on zebrafish. We make the case that zebrafish exposed to EDCs at different stages of development can provide important insights on EDC effects on human health.
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Affiliation(s)
- Michael E Baker
- Department of MedicineUniversity of California San Diego, 9500 Gilman Drive 0605, La Jolla, California 92093-0605, USACSRC and BIMRCSan Diego State University, 5500 Campanile Drive, San Diego, California 92182-7720, USADepartment of MedicineMedical University of South Carolina, 135 Cannon Street, Suite 303 MSC 835, Charleston, South Carolina 29425, USA
| | - Gary Hardiman
- Department of MedicineUniversity of California San Diego, 9500 Gilman Drive 0605, La Jolla, California 92093-0605, USACSRC and BIMRCSan Diego State University, 5500 Campanile Drive, San Diego, California 92182-7720, USADepartment of MedicineMedical University of South Carolina, 135 Cannon Street, Suite 303 MSC 835, Charleston, South Carolina 29425, USADepartment of MedicineUniversity of California San Diego, 9500 Gilman Drive 0605, La Jolla, California 92093-0605, USACSRC and BIMRCSan Diego State University, 5500 Campanile Drive, San Diego, California 92182-7720, USADepartment of MedicineMedical University of South Carolina, 135 Cannon Street, Suite 303 MSC 835, Charleston, South Carolina 29425, USA
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Chen J, Gomez-Sanchez CE, Penman A, May PJ, Gomez-Sanchez E. Expression of mineralocorticoid and glucocorticoid receptors in preautonomic neurons of the rat paraventricular nucleus. Am J Physiol Regul Integr Comp Physiol 2014; 306:R328-40. [PMID: 24381176 PMCID: PMC3949076 DOI: 10.1152/ajpregu.00506.2013] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 12/23/2013] [Indexed: 01/12/2023]
Abstract
Activation of mineralocorticoid receptors (MR) of the hypothalamic paraventricular nucleus (PVN) increases sympathetic excitation. To determine whether MR and glucocorticoid receptors (GR) are expressed in preautonomic neurons of the PVN and how they relate to endogenous aldosterone levels in healthy rats, retrograde tracer was injected into the intermediolateral cell column at T4 to identify preautonomic neurons in the PVN. Expression of MR, GR, 11-β hydroxysteroid dehydrogenase1 and 2 (11β-HSD1, 2), and hexose-6-phosphate dehydrogenase (H6PD) required for 11β-HSD1 reductase activity was assessed by immunohistochemistry. RT-PCR and Western blot analysis were used to determine MR gene and protein expression. Most preautonomic neurons were in the caudal mediocellular region of PVN, and most expressed MR; none expressed GR. 11β-HSD1, but not 11β-HSD2 nor H6PD immunoreactivity, was detected in the PVN. In rats with chronic low or high sodium intakes, the low-sodium diet was associated with significantly higher plasma aldosterone, MR mRNA and protein expression, and c-Fos immunoreactivity within labeled preautonomic neurons. Plasma corticosterone and sodium and expression of tonicity-responsive enhancer binding protein in the PVN did not differ between groups, suggesting osmotic adaptation to the altered sodium intake. These results suggest that MR within preautonomic neurons in the PVN directly participate in the regulation of sympathetic nervous system drive, and aldosterone may be a relevant ligand for MR in preautonomic neurons of the PVN under physiological conditions. Dehydrogenase activity of 11β-HSD1 occurs in the absence of H6PD, which regenerates NADP(+) from NADPH and may increase MR gene expression under physiological conditions.
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Affiliation(s)
- Jian Chen
- Department of Neurobiology and Anatomical Science, University of Mississippi Medical Center, Jackson, Mississippi
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Boucher E, Provost PR, Tremblay Y. Ontogeny of adrenal-like glucocorticoid synthesis pathway and of 20α-hydroxysteroid dehydrogenase in the mouse lung. BMC Res Notes 2014; 7:119. [PMID: 24580729 PMCID: PMC3944916 DOI: 10.1186/1756-0500-7-119] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 02/24/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Glucocorticoids exert recognized positive effects on lung development. The genes involved in the classical pathway of glucocorticoid synthesis normally occurring in adrenals were found to be expressed on gestation day (GD) 15.5 in the developing mouse lung. Recently, expression of two of these genes was also detected on GD 17.5 suggesting a more complex temporal regulation than previously expected. Here, we deepen the knowledge on expression of "adrenal" glucocorticoid synthesis genes in the mouse lung during the perinatal period and we also study expression of the gene encoding for the steroid inactivating enzyme 20α-hydroxysteroid dehydrogenase (20α-HSD). RESULTS We performed an ontogenic study of P450scc, 3β-hydroxysteroid dehydrogenase/Δ5-Δ4 isomerase 1 (3β-HSD1), 21-hydroxylase, 11β-hydroxylase, 11β-HSD1, and 11β-HSD2 expression up to post natal day (PN) 15. The substrate (progesterone) and the product (deoxycorticosterone) of 21-hydroxylase are substrates of 20α-HSD, thus 20α-HSD (Akr1c18) gene expression was investigated. In lung samples collected between GD 15.5 and PN 15, 11β-hydroxylase was only detected on GD 15.5. In contrast, all the other tested genes were expressed throughout the analyzed period with different temporal expression patterns. P450scc, 21-hydroxylase, 20α-HSD and 11β-HSD2 mRNA levels increased after birth with different patterns including an increase from PN 3 with a possible sex difference for 21-hydroxylase mRNA. Also, the 21-hydroxylase protein was observed by Western blot in perinatal lungs with higher levels after birth. CONCLUSION Progesterone is present at high levels during gestation and the product of 21-hydroxylase, deoxycorticosterone, can bind the glucocorticoid receptor with an affinity close to that of corticosterone. Detection of 21-hydroxylase at the protein level during antenatal lung development is the first evidence that the adrenal-like glucocorticoid synthesis pathway detected during lung development has the machinery to produce glucocorticoids in the fetal lung. Glucocorticoids from lung 21-hydroxylase appear to modulate lung ontogenesis through paracrine/intracrine actions.
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Affiliation(s)
| | | | - Yves Tremblay
- Reproduction, mother and youth health, Centre de recherche du CHU de Québec, Québec, QC, Canada.
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Baker ME, Funder JW, Kattoula SR. Evolution of hormone selectivity in glucocorticoid and mineralocorticoid receptors. J Steroid Biochem Mol Biol 2013; 137:57-70. [PMID: 23907018 DOI: 10.1016/j.jsbmb.2013.07.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 07/02/2013] [Accepted: 07/22/2013] [Indexed: 02/02/2023]
Abstract
Mineralocorticoid receptors (MR) and glucocorticoid receptors (GR) are descended from an ancestral corticoid receptor (CR). To date, the earliest CR have been found in lamprey and hagfish, two jawless fish (cyclostomes) that evolved at the base of the vertebrate line. Lamprey CR has both MR and GR activity. Distinct orthologs of the GR and MR first appear in skates and sharks, which are cartilaginous fishes (Chondrichthyes). Aldosterone, the physiological mineralocorticoid in terrestrial vertebrates, first appears in lobe-finned fish, such as lungfish and coelacanth, forerunners of terrestrial vertebrates, but not in sharks, skates or ray-finned fish. Skate MR are transcriptionally activated by glucocorticoids, such as corticosterone and cortisol, as well as by mineralocorticoids such as deoxycorticosterone and (experimentally) aldosterone; skate GR have low affinity for all human corticosteroids and 1α-OH-corticosterone, which has been proposed to be biologically active glucocorticoid. In fish, cortisol is both physiological mineralocorticoid and glucocorticoid; in terrestrial vertebrates, cortisol or corticosterone are the physiological glucocorticoids acting through GR, and aldosterone via MR as the physiologic mineralocorticoid. MR have equally high affinity for cortisol, corticosterone and progesterone. We review this evolutionary process through an analysis of changes in sequence and structure of vertebrate GR and MR, identifying changes in these receptors in skates and lobe-fined fish important in allowing aldosterone to act as an agonist at epithelial MR and glucocorticoid specificity for GR. hMR and hGR have lost a key contact between helix 3 and helix 5 that was present in their common ancestor. A serine that is diagnostic for vertebrate MR, and absent in terrestrial and fish GR, is present in lamprey CR, skate MR and GR, but not in coelacanth GR, marking the transition of the GR from MR ancestor. Based on the response of the CR and skate MR and GR to corticosteroids, we conclude that the mechanism(s) for selectivity of GR for cortisol and corticosterone and the specificity of aldosterone for MR are incompletely understood. This article is part of a Special Issue entitled 'CSR 2013'.
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Affiliation(s)
- Michael E Baker
- Department of Medicine, 0693, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0693, United States.
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Feng X, Reini SA, Richards E, Wood CE, Keller-Wood M. Cortisol stimulates proliferation and apoptosis in the late gestation fetal heart: differential effects of mineralocorticoid and glucocorticoid receptors. Am J Physiol Regul Integr Comp Physiol 2013; 305:R343-50. [PMID: 23785077 DOI: 10.1152/ajpregu.00112.2013] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We have previously found that modest chronic increases in maternal cortisol result in an enlarged fetal heart. To explore the mechanisms of this effect, we used intrapericardial infusions of a mineralocorticoid receptor (MR) antagonist (canrenoate) or of a glucocorticoid receptor (GR) antagonist (mifepristone) in the fetus during maternal infusion of cortisol (1 mg·kg⁻¹·day⁻¹). We have shown that the MR antagonist blocked the increase in fetal heart weight and in wall thickness resulting from maternal cortisol infusion. In the current study we extended those studies and found that cortisol increased Ki67 staining in both ventricles, indicating cell proliferation, but also increased active caspase-3 staining in cells of the conduction pathway in the septum and subendocardial layers of the left ventricle, suggesting increased apoptosis in Purkinje fibers. The MR antagonist blocked the increase in cell proliferation, whereas the GR antagonist blocked the increased apoptosis in Purkinje fibers. We also found evidence of activation of caspase-3 in c-kit-positive cells, suggesting apoptosis in stem cell populations in the ventricle. These studies suggest a potentially important role of corticosteroids in the terminal remodeling of the late gestation fetal heart and suggest a mechanism for the cardiac enlargement with excess corticosteroid exposure.
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Affiliation(s)
- Xiaodi Feng
- Departments of Pharmacodynamics, and Physiology and Functional Genomics, University of Florida, Gainesville, Florida
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