DOCSLIB.ORG

Mineralocorticoid Receptors Are Indispensable for Nongenomic Modulation of Hippocampal Glutamate Transmission by Corticosterone

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Mineralocorticoid Receptors Are Indispensable for Nongenomic Modulation of Hippocampal Glutamate Transmission by Corticosterone Mineralocorticoid receptors are indispensable for nongenomic modulation of hippocampal glutamate transmission by corticosterone Henk Karst*†, Stefan Berger‡, Marc Turiault§, Francois Tronche§,Gu¨ nther Schu¨ tz‡, and Marian Joe¨ ls* *Swammerdam Institute for Life Sciences, Center for Neurosciences (SILS–CNS), University of Amsterdam, Kruislaan 320, 1098 SM Amsterdam, The Netherlands; ‡German Cancer Research Institute, 69120 Heidelberg, Germany; and §Centre National de la Recherche Scientifique FRE 2401, College de France, 75231 Paris Cedex, France Edited by Bruce S. McEwen, The Rockefeller University, New York, NY, and approved October 26, 2005 (received for review August 31, 2005) The adrenal hormone corticosterone transcriptionally regulates housed in cages with a light͞dark cycle of 12 h (lights on at 0800 responsive genes in the rodent hippocampus through nuclear hours). Food and water were given ad libitum. The experiments mineralocorticoid and glucocorticoid receptors. Via this genomic were carried out with permission of the local Animal Committee pathway the hormone alters properties of hippocampal cells (file no. DED 91). One mouse per day was decapitated under rest slowly and for a prolonged period. Here we report that cortico- around 0930 hours, i.e., when plasma corticosterone levels are sterone also rapidly and reversibly changes hippocampal signaling. low (ref. 5; Ϸ2 ␮g͞dl). Stress levels of the hormone enhance the frequency of miniature A limited number of experiments was performed in brain- excitatory postsynaptic potentials in CA1 pyramidal neurons and specific GR (12) and MR knockout mice. Details about the reduce paired-pulse facilitation, pointing to a hormone-dependent generation of MR mutants are described in Supporting Text, enhancement of glutamate-release probability. The rapid effect by which is published as supporting information on the PNAS web corticosterone is accomplished through a nongenomic pathway site. In these two mutant lines, immunoreactivity of the GR and involving membrane-located receptors. Unexpectedly, the rapid MR protein, respectively, was lost in all CA1 neurons, which did effect critically depends on the classical mineralocorticoid receptor, express the proteins in control animals. In view of the elevated as evidenced by the effectiveness of agonists, antagonists, and corticosterone levels in GR mutants, both the mutant mice and brain-specific inactivation of the mineralocorticoid but not the their control littermates (GRloxP/loxP) were adrenalectomized, glucocorticoid receptor gene. Rapid actions by corticosterone which in mice resulted in low (Ϸ1 ␮g͞dl) levels of circulating would allow the brain to change its function within minutes after corticosterone, not unlike the levels in adrenally intact mice, stress-induced elevations of corticosteroid levels, in addition to which were decapitated in the morning under rest. responding later through gene-mediated signaling pathways. Slice Preparation and Recording. On the day of the experiment, the ␣-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor ͉ CA1 animal was decapitated, and the brain was removed from the hippocampus ͉ glucocorticoid receptor knockout ͉ miniature excitatory skull and stored in continuously gassed medium. Transverse postsynaptic current ͉ mineralocorticoid receptor knockout slices of the hippocampus were made with a tissue chopper and stored at room temperature in medium containing 124 mM he release of corticosterone, i.e., the prevailing endogenous NaCl, 3.5 mM KCl, 1.25 mM NaH2PO4, 1.5 mM MgSO4,2mM ϭ Tadrenal corticosteroid in rats and mice, is markedly en- CaCl, 25 mM NaHCO3, and 10 mM glucose (osmolarity 300 hanced after exposure to a stressor. Hormone levels rise within mOsm; pH 7.4). One slice at a time was fully submerged in a minutes and return to baseline Ϸ60–90 min after the stress (1). recording chamber and continuously perfused with the medium Corticosterone can quickly enter the brain and bind to two (32°C, 2–3 ml͞s), as described in ref. 13. Bicuculline methiodide subtypes of discretely localized receptors, the high-affinity min- (20 ␮M, Sigma) was added to block GABAA receptor-mediated eralocorticoid receptor (MR) and the lower-affinity glucocor- signals. ticoid receptor (GR) (2). Hippocampal CA1 neurons abundantly Whole-cell patch clamp recordings were made with an Axo- express both receptor types. Activated corticosteroid receptors patch 200B amplifier (Axon Instruments, Union City, CA) by are known to modify transcription of responsive genes, either using borosilicate glass electrodes (1.5-mm outer diameter; through DNA binding of homodimers or through protein– Hilgenberg, Malsfeld, Germany; pulled on a Sutter micropipette protein interactions with other transcription factors (3, 4). In this puller), with an impedance of 3–4 M⍀. The intracellular pipette way, hippocampal cell properties, like calcium influx, were found solution contained 120 mM Cs methane sulfonate, 17.5 mM to be altered in a slow but persistent manner (5). In recent years, CsCl, 10 mM Hepes, 2 mM MgATP, 0.1 mM NaGTP, 5 mM though, preliminary evidence has accumulated that corticoste- BAPTA, and 10 mM QX-314 (osmolarity ϭ 295 mOsm; pH 7.4), rone can also induce rapid effects in brain (6–10), which would adjusted with CsOH. BAPTA was obtained from Molecular vastly expand the time window over which adrenal hormones can Probes, the sodium channel blocker QX-314 was from Alomone affect brain function. Although in amphibian brain a specific (Jerusalem), and all other chemicals were from Sigma. Under membrane receptor was isolated mediating rapid behavioral visual control the recording electrode was directed toward a CA1 effects (11), the underlying mechanism and presumed mem- neuron by using positive pressure. Once a patch electrode was brane receptor involved in rapid effects of the mammalian sealed on the cell (Ϸ1G⍀) the membrane patch under the hormone remained unresolved. We here demonstrate that a rapid nongenomic effect by corticosterone through membrane- located receptors critically depends on the MR, which hitherto Conflict of interest statement: No conflict declared. was regarded only as a nuclear receptor. This paper was submitted directly (Track II) to the PNAS office. Abbreviations: EPSC, excitatory postsynaptic current; mEPSC, miniature EPSC; MR, miner- Methods alocorticoid receptor; GR, glucocorticoid receptor. Animals. All experiments, unless stated otherwise, were per- †To whom correspondence should be addressed. E-mail: [email protected]. formed on male C57BL͞6 mice, Ϸ6 weeks of age and group- © 2005 by The National Academy of Sciences of the USA 19204–19207 ͉ PNAS ͉ December 27, 2005 ͉ vol. 102 ͉ no. 52 www.pnas.org͞cgi͞doi͞10.1073͞pnas.0507572102 Downloaded by guest on September 23, 2021 Fig. 1. Corticosterone rapidly and reversibly enhances mEPSC frequency in hippocampal cells. (A) Typical example showing enhanced mEPSC frequency in a CA1 pyramidal cell during 100 nM corticosterone (cort) application (Middle) compared with the control situation (Top). Bottom shows the typical shape of an mEPSC. (B) Example showing that mEPSC frequency is rapidly and reversibly enhanced by corticosterone but not by vehicle (0.009% ethanol). (C) Cumulative frequency histogram of the mEPSC frequency in a CA1 hippocampal cell, showing that the mEPSC frequency is enhanced in the presence of corticosterone and returns to pretreatment levels after corticosterone has been washed out. (D) Percentual increase in mEPSC frequency caused by various concentrations of corticosterone (filled circles, based on n ϭ 3–5 cells for each concentration), showing that 10 nM corticosterone, but not lower concentrations of corticosterone, induces a significant (P Ͻ 0.05) increase in mEPSC frequency. The membrane-impermeable BSA–corticosterone conjugate (100 nM; n ϭ 5) also resulted in a marked increase in mEPSC frequency. In the presence of the protein synthesis inhibitor cycloheximide (100 nM; n ϭ 5), corticosterone was still able to enhance the mEPSC frequency. Symbols represent the mean ϩ SEM values. electrode was ruptured and the cell was held at a holding receptor blocker CNQX or the selective ␣-amino-3-hydroxy-5- potential of Ϫ70 mV. Recordings with an uncompensated series methyl-4-isoxazolepropionic acid (AMPA) receptor blocker resistance of Ͻ2.5 times the pipette resistance were accepted for GYKI 53655 was perfused to confirm that the mEPSCs were analysis. Data acquisition was performed with PCLAMP 8.2 and indeed mediated by AMPA receptors. The digitized data (stored analyzed with CLAMPFIT 8.2 and STRATHCLYDE software (J. on PC via Digidata interface) were analyzed off-line by using Dempster, University of Strathclyde, Glasgow, U.K.). STRATHCLYDE software with detection threshold levels set above 5 pA. The currents were identified as mEPSCs when the rise time Stimulus Evoked of Excitatory Postsynaptic Currents (EPSCs). A bi- was faster than the decay time (13). Of all cells measured, the polar stainless steel stimulus electrode was placed in the Schaffer following mEPSC characteristics were determined: inter- collaterals. Biphasic stimuli were applied through a stimulus mEPSC interval and frequency, rise time, peak amplitude, and isolator driven by PCLAMP 8.2. Input–output curves of EPSCs ␶ of decay. The decay of each mEPSC was fitted with a evoked in CA1 neurons were made at holding potential (Ϫ70 monoexponential curve using the WHOLECELL program of the mV) by stimuli of increasing intensities (from 16 ␮A to 500 ␮A), STRATHCLYDE software.
Load more

Recommended publications
  • 1 Progesterone: an Enigmatic Ligand for the Mineralocorticoid Receptor
    Progesterone: An Enigmatic Ligand for the Mineralocorticoid Receptor Michael E. Baker1 Yoshinao Katsu2 1Division of Nephrology-Hypertension Department of Medicine, 0735 University of California, San Diego 9500 Gilman Drive La Jolla, CA 92093-0735 2Graduate School of Life Science Hokkaido University Sapporo, Japan Correspondence to: M. E. Baker; E-mail: [email protected] Y. Katsu; E-mail: [email protected] 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.
    [Show full text]
  • Mineralocorticoid Receptor Mutations
    234 1 M-C ZENNARO and MR mutations 234:1 T93–T106 Thematic Review F FERNANDES-ROSA 30 YEARS OF THE MINERALOCORTICOID RECEPTOR Mineralocorticoid receptor mutations Maria-Christina Zennaro1,2,3 and Fabio Fernandes-Rosa1,2,3 Correspondence 1INSERM, Paris Cardiovascular Research Center, Paris, France should be addressed 2Université Paris Descartes, Sorbonne Paris Cité, Paris, France to M-C Zennaro 3Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Service de Génétique, Email Paris, France maria-christina.zennaro@ inserm.fr Abstract Aldosterone and the mineralocorticoid receptor (MR) are key elements for maintaining Key Words fluid and electrolyte homeostasis as well as regulation of blood pressure. Loss-of- f mineralocorticoid function mutations of the MR are responsible for renal pseudohypoaldosteronism type receptor 1 (PHA1), a rare disease of mineralocorticoid resistance presenting in the newborn with f pseudohypoaldosteronism type 1- PHA1 weight loss, failure to thrive, vomiting and dehydration, associated with hyperkalemia f aldosterone and metabolic acidosis, despite extremely elevated levels of plasma renin and f hormone receptors aldosterone. In contrast, a MR gain-of-function mutation has been associated with a f nuclear receptor familial form of inherited mineralocorticoid hypertension exacerbated by pregnancy. In Endocrinology addition to rare variants, frequent functional single nucleotide polymorphisms of the of MR are associated with salt sensitivity, blood pressure, stress response and depression in the general population. This review will summarize our knowledge on MR mutations in Journal PHA1, reporting our experience on the genetic diagnosis in a large number of patients performed in the last 10 years at a national reference center for the disease.
    [Show full text]
  • Agonistic and Antagonistic Properties of Progesterone Metabolites at The
    European Journal of Endocrinology (2002) 146 789–800 ISSN 0804-4643 EXPERIMENTAL STUDY Agonistic and antagonistic properties of progesterone metabolites at the human mineralocorticoid receptor M Quinkler, B Meyer, C Bumke-Vogt, C Grossmann, U Gruber, W Oelkers, S Diederich and V Ba¨hr Department of Endocrinology, Klinikum Benjamin Franklin, Freie Universita¨t Berlin, Hindenburgdamm 30, 12200 Berlin, Germany (Correspondence should be addressed to M Quinkler; Email: [email protected]) Abstract Objective: Progesterone binds to the human mineralocorticoid receptor (hMR) with nearly the same affinity as do aldosterone and cortisol, but confers only low agonistic activity. It is still unclear how aldosterone can act as a mineralocorticoid in situations with high progesterone concentrations, e.g. pregnancy. One mechanism could be conversion of progesterone to inactive compounds in hMR target tissues. Design: We analyzed the agonist and antagonist activities of 16 progesterone metabolites by their binding characteristics for hMR as well as functional studies assessing transactivation. Methods: We studied binding affinity using hMR expressed in a T7-coupled rabbit reticulocyte lysate system. We used co-transfection of an hMR expression vector together with a luciferase reporter gene in CV-1 cells to investigate agonistic and antagonistic properties. Results: Progesterone and 11b-OH-progesterone (11b-OH-P) showed a slightly higher binding affinity than cortisol, deoxycorticosterone and aldosterone. 20a-dihydro(DH)-P, 5a-DH-P and 17a-OH-P had a 3- to 10-fold lower binding potency. All other progesterone metabolites showed a weak affinity for hMR. 20a-DH-P exhibited the strongest agonistic potency among the metabolites tested, reaching 11.5% of aldosterone transactivation.
    [Show full text]
  • Aldosterone and Mineralocorticoid Receptors—Physiology and Pathophysiology
    International Journal of Molecular Sciences Conference Report Aldosterone and Mineralocorticoid Receptors—Physiology and Pathophysiology John W. Funder Hudson Institute of Medical Research, Monash University, 27–31 Wright St., Clayton 3168, Australia; [email protected] Academic Editors: Anastasia Susie Mihailidou, Jan Danser, Sadayoshi Ito, Fumitoshi Satoh and Akira Nishiyama Received: 8 March 2017; Accepted: 4 May 2017; Published: 11 May 2017 Abstract: Aldosterone is a uniquely terrestrial hormone, first appearing in lungfish, which have both gills and lungs. Mineralocorticoid receptors (MRs), on the other hand, evolved much earlier, and are found in cartilaginous and bony fish, presumptive ligand cortisol. MRs have equivalent high affinity for aldosterone, progesterone, and cortisol; in epithelia, despite much higher cortisol circulating levels, aldosterone selectively activates MRs by co-expression of the enzyme 11β-hydroxysteroid dehydrogenase, Type 11. In tissues in which the enzyme is not expressed, MRs are overwhelmingly occupied but not activated by cortisol, which normally thus acts as an MR antagonist; in tissue damage, however, cortisol mimics aldosterone and acts as an MR agonist. The risk profile for primary aldosteronism (PA) is much higher than that in age-, sex-, and blood pressure-matched essential hypertensives. High levels of aldosterone per se are not the problem: in chronic sodium deficiency, as seen in the monsoon season in the highlands of New Guinea, plasma aldosterone levels are extraordinarily high, but cause neither hypertension nor cardiovascular damage. Such damage occurs when aldosterone levels are out of the normal feedback control, and are inappropriately elevated for the salt status of the individual (or experimental animal). The question thus remains of how excess salt can synergize with elevated aldosterone levels to produce deleterious cardiovascular effects.
    [Show full text]
  • The Necessity and Effectiveness of Mineralocorticoid Receptor Antagonist in the Treatment of Diabetic Nephropathy
    Hypertension Research (2015) 38, 367–374 & 2015 The Japanese Society of Hypertension All rights reserved 0916-9636/15 www.nature.com/hr REVIEW The necessity and effectiveness of mineralocorticoid receptor antagonist in the treatment of diabetic nephropathy Atsuhisa Sato Diabetes mellitus is a major cause of chronic kidney disease (CKD), and diabetic nephropathy is the most common primary disease necessitating dialysis treatment in the world including Japan. Major guidelines for treatment of hypertension in Japan, the United States and Europe recommend the use of angiotensin-converting enzyme inhibitors and angiotensin-receptor blockers, which suppress the renin-angiotensin system (RAS), as the antihypertensive drugs of first choice in patients with coexisting diabetes. However, even with the administration of RAS inhibitors, failure to achieve adequate anti-albuminuric, renoprotective effects and a reduction in cardiovascular events has also been reported. Inadequate blockade of aldosterone may be one of the reasons why long-term administration of RAS inhibitors may not be sufficiently effective in patients with diabetic nephropathy. This review focuses on treatment in diabetic nephropathy and discusses the significance of aldosterone blockade. In pre-nephropathy without overt nephropathy, a mineralocorticoid receptor antagonist can be used to enhance the blood pressure-lowering effects of RAS inhibitors, improve insulin resistance and prevent clinical progression of nephropathy. In CKD categories A2 and A3, the addition of a mineralocorticoid receptor antagonist to an RAS inhibitor can help to maintain ‘long-term’ antiproteinuric and anti-albuminuric effects. However, in category G3a and higher, sufficient attention must be paid to hyperkalemia. Mineralocorticoid receptor antagonists are not currently recommended as standard treatment in diabetic nephropathy.
    [Show full text]
  • Pharmacologic Characteristics of Corticosteroids 대한신경집중치료학회
    REVIEW J Neurocrit Care 2017;10(2):53-59 https://doi.org/10.18700/jnc.170035 eISSN 2508-1349 Pharmacologic Characteristics of Corticosteroids 대한신경집중치료학회 Sophie Samuel, PharmD1, Thuy Nguyen, PharmD1, H. Alex Choi, MD2 1Department of Pharmacy, Memorial Hermann Texas Medical Center, Houston, TX; 2Department of Neurosurgery and Neurology, The University of Texas Medical School at Houston, Houston, TX, USA Corticosteroids (CSs) are used frequently in the neurocritical care unit mainly for their anti- Received December 7, 2017 inflammatory and immunosuppressive effects. Despite their broad use, limited evidence Revised December 7, 2017 exists for their efficacy in diseases confronted in the neurocritical care setting. There are Accepted December 17, 2017 considerable safety concerns associated with administering these drugs and should be limited Corresponding Author: to specific conditions in which their benefits outweigh the risks. The application of CSs in H. Alex Choi, MD neurologic diseases, range from traumatic head and spinal cord injuries to central nervous Department of Pharmacy, Memorial system infections. Based on animal studies, it is speculated that the benefit of CSs therapy Hermann Texas Medical Center, 6411 in brain and spinal cord, include neuroprotection from free radicals, specifically when given Fannin Street, Houston, TX 77030, at a higher supraphysiologic doses. Regardless of these advantages and promising results in USA animal studies, clinical trials have failed to show a significant benefit of CSs administration Tel: +1-713-500-6128 on neurologic outcomes or mortality in patients with head and acute spinal injuries. This Fax: +1-713-500-0665 article reviews various chemical structures between natural and synthetic steroids, discuss its E-mail: [email protected] pharmacokinetic and pharmacodynamic profiles, and describe their use in clinical practice.
    [Show full text]
  • The Role of the Mineralocorticoid Receptor in the Vasculature
    234 1 J J DUPONT and I Z JAFFE MR in the vasculature 234:1 T67–T82 Thematic Review 30 YEARS OF THE MINERALOCORTICOID RECEPTOR The role of the mineralocorticoid receptor in the vasculature Correspondence should be addressed to I Z Jaffe Jennifer J DuPont and Iris Z Jaffe Email Ijaffe@tuftsmedicalcenter. Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, USA org Abstract Since the mineralocorticoid receptor (MR) was cloned 30 years ago, it has become clear Key Words that MR is expressed in extra-renal tissues, including the cardiovascular system, where it is f vasculature expressed in all cells of the vasculature. Understanding the role of MR in the vasculature f hormone receptors has been of particular interest as clinical trials show that MR antagonism improves f cardiovascular cardiovascular outcomes out of proportion to changes in blood pressure. The last 30 years f renin-angiotensin system of research have demonstrated that MR is a functional hormone-activated transcription factor in vascular smooth muscle cells and endothelial cells. This review summarizes advances in our understanding of the role of vascular MR in regulating blood pressure and vascular function, and its contribution to vascular disease. Specifically, vascular MR Endocrinology contributes directly to blood pressure control and to vascular dysfunction and remodeling of in response to hypertension, obesity and vascular injury. The literature is summarized with respect to the role of vascular MR in conditions including: pulmonary hypertension; Journal cerebral vascular remodeling and stroke; vascular inflammation, atherosclerosis and myocardial infarction; acute kidney injury; and vascular pathology in the eye. Considerations regarding the impact of age and sex on the function of vascular MR are also described.
    [Show full text]
  • Mineralocorticoid Receptor and Endothelial Dysfunction in Hypertension
    Current Hypertension Reports (2019) 21:78 https://doi.org/10.1007/s11906-019-0981-4 MECHANISMS OF HYPERTENSION AND TARGET-ORGAN DAMAGE (JE HALL AND ME HALL, SECTION EDITORS) Mineralocorticoid Receptor and Endothelial Dysfunction in Hypertension Jessica L. Faulkner1 & Eric J. Belin de Chantemèle1 # Springer Science+Business Media, LLC, part of Springer Nature 2019 Abstract Purpose of Review To review the latest reports of the contributions of the endothelial mineralocorticoid receptor to endothelial dysfunction and hypertension to begin to determine the clinical potential for this pathway for hypertension treatment. Recent Findings Endothelial mineralocorticoid receptor expression is sex-specifically increased in female mice and humans compared with males. Moreover, the expression of endothelial mineralocorticoid receptors is increased by endothelial progesterone receptor activation and naturally occurring fluctuations in progesterone levels (estrous, preg- nancy) predict endothelial mineralocorticoid receptor expression levels in female mice. These data follow many previous reports that have indicated that endothelial mineralocorticoid receptor deletion is protective in the development of obesity- and diabetes-associated endothelial dysfunction in female mouse models. These studies have more recently been followed up by reports indicating that both intact endothelial mineralocorticoid receptor and progesterone receptor expression are required for obesity-associated, leptin-mediated endothelial dysfunction in female mice. In addition, the
    [Show full text]
  • Sex-Specific Responses to Mineralocorticoid Receptor Antagonism in Hypertensive African American Males and Females John S
    Clemmer et al. Biology of Sex Differences (2019) 10:24 https://doi.org/10.1186/s13293-019-0238-6 RESEARCH Open Access Sex-specific responses to mineralocorticoid receptor antagonism in hypertensive African American males and females John S. Clemmer1* , Jessica L. Faulkner4, Alex J. Mullen1, Kenneth R. Butler3 and Robert L. Hester1,2 Abstract Background: African Americans (AA) develop hypertension (HTN) at an earlier age, have a greater frequency and severity of HTN, and greater prevalence of uncontrolled HTN as compared to the white population. Mineralocorticoid antagonists have been shown to be very effective in treating uncontrolled HTN in both AA and white patients, but sex- specific responses are unclear. Methods: We evaluated the sex-specific impact of mineralocorticoid antagonism in an AA population. An AA cohort (n = 1483) from the Genetic Epidemiology Network of Arteriopathy study was stratified based on sex and whether they were taking spironolactone, a mineralocorticoid antagonist, in their antihypertensive regimen. Results: As compared to AA women not prescribed a mineralocorticoid antagonist, AA women taking spironolactone (n = 9) had lower systolic and diastolic blood pressure despite having a similar number of antihypertensive medications. The proportion of AA women with uncontrolled HTN was significantly less for patients taking spironolactone than for patients not prescribed spironolactone. Interestingly, none of these associations were found in the AA males or in white females. Conclusions: Our data suggests that spironolactone is particularly effective in reducing blood pressure and controlling HTN in AA women. Further research into the impact of this therapy in this underserved and understudied minority is warranted. Keywords: Sex-specific, Hypertension, Mineralocorticoid antagonist, African American Introduction African Americans (AA) develop HTN earlier and Roughly one in three American adults is hypertensive have a lower rate of controlled HTN than other ethnici- [1].
    [Show full text]
  • The Role of the Mineralocorticoid Receptor for Cognitive Function, Mood and Social Cognition
    Fachbereich Erziehungswissenschaft und Psychologie der Freien Universität Berlin The Role of the Mineralocorticoid Receptor for Cognitive Function, Mood and Social Cognition – An Examination in Patients with Primary Adrenal Insufficiency and in Healthy Subjects – Dissertation zur Erlangung des akademischen Grades Doktorin der Philosophie (Dr. phil.) vorgelegt von Dipl.-Psych. Katharina Schultebraucks Berlin, 2016 Erstgutachterin (first supervisor): Prof. Dr. rer. nat. Katja Wingenfeld Zweitgutachter (second supervisor): Prof. Dr. med. Hauke Heekeren Tag der Disputation: 05.12.2016 Acknowledgements I am very grateful to my first and second supervisors Katja Wingenfeld and Hauke Heekeren. Special thanks to the extended supervision team, in particular to Christian Otte for the invaluable support and constructive review of my work. The thesis would not have been possible without their expertise, trust, encouragement and inspiration. Special thanks also to every member of the examination committee: Malek Bajbouj, Annette Kinder & Lars Schulze. Furthermore, special thanks to Marcus Quinkler and the other associates of the Department of Clinical Endocrinology at Charité Universitätsmedizin Berlin, CCM, for the fruitful cooperation and help with the recruitment of the really rare patients with Addison’s disease. Moreover, I would like to thank my colleagues from Charité Universitätsmedizin Berlin, namely Moritz Düsenberg, Juliane Fleischer, Jan Nowacki, Christian Deuter, Linn Kühl, Sabrina Golde, Helge Hasselmann, Dominique Piber, Julian Hellman-Regen, Jana Heimes, Lisa Lockenvitz, Antonia Domke and many more for the good times, the inspiring working environment and the companionship in and out the lab. Additionally, I would like to thank all of my co-authors for their contributions and cooperation as well as everyone else, who supported me to make this dissertation thesis possible.
    [Show full text]
  • Mineralocorticoid Receptor Antagonists, Blood Pressure, And
    Mineralocorticoid Receptor Antagonists, Blood Pressure, and Outcomes in Heart Failure With Reduced Ejection Fraction Matteo Serenelli, Alice Jackson, Pooja Dewan, Pardeep Jhund, Mark Petrie, Patrick Rossignol, Gianluca Campo, Bertram Pitt, Faiez Zannad, Joao Pedro Ferreira, et al. To cite this version: Matteo Serenelli, Alice Jackson, Pooja Dewan, Pardeep Jhund, Mark Petrie, et al.. Mineralocorti- coid Receptor Antagonists, Blood Pressure, and Outcomes in Heart Failure With Reduced Ejection Fraction. JACC: Heart Failure, Elsevier/American College of Cardiology, 2020, 8 (3), pp.188-198. 10.1016/j.jchf.2019.09.011. hal-02516098 HAL Id: hal-02516098 https://hal.univ-lorraine.fr/hal-02516098 Submitted on 24 Nov 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License JACC: HEART FAILURE VOL.8,NO.3,2020 ª 2020 THE AUTHORS. PUBLISHED BY ELSEVIER ON BEHALF OF THE AMERICAN COLLEGE OF CARDIOLOGY FOUNDATION. THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE (http://creativecommons.org/licenses/by/4.0/). Mineralocorticoid Receptor Antagonists, Blood Pressure, and Outcomes in Heart Failure With Reduced Ejection Fraction a,b a a a Matteo Serenelli, MD, Alice Jackson, MBCHB, Pooja Dewan, MBBS, Pardeep S.
    [Show full text]
  • The Road to Better Management in Resistant Hypertension—Diagnostic and Therapeutic Insights
    pharmaceutics Review The Road to Better Management in Resistant Hypertension—Diagnostic and Therapeutic Insights 1,2 1,2, 1,2 1,2 1,2 Elisabeta Bădilă , Cristina Japie *, Emma Weiss , Ana-Maria Balahura , Daniela Bartos, and 1,3 Alexandru Scafa Udris, te 1 Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy Bucharest, 050474 Bucharest, Romania; [email protected] (E.B.); [email protected] (E.W.); [email protected] (A.-M.B.); [email protected] (D.B.); [email protected] (A.S.U.) 2 Department of Internal Medicine, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania 3 Department of Cardiology, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania * Correspondence: [email protected] Abstract: Resistant hypertension (R-HTN) implies a higher mortality and morbidity compared to non-R-HTN due to increased cardiovascular risk and associated adverse outcomes—greater risk of developing chronic kidney disease, heart failure, stroke and myocardial infarction. R-HTN is considered when failing to lower blood pressure below 140/90 mmHg despite adequate lifestyle measures and optimal treatment with at least three medications, including a diuretic, and usually a blocker of the renin-angiotensin system and a calcium channel blocker, at maximally tolerated doses. Hereby, we discuss the diagnostic and therapeutic approach to a better management of R- HTN. Excluding pseudoresistance, secondary hypertension, white-coat hypertension and medication non-adherence is an important step when diagnosing R-HTN. Most recently different phenotypes associated to R-HTN have been described, specifically refractory and controlled R-HTN and masked Citation: B˘adil˘a,E.; Japie, C.; Weiss, uncontrolled hypertension.
    [Show full text]