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https://www.readbyqxmd.com/read/29223280/circadian-and-ultradian-patterns-of-hpa-axis-activity-in-rodents-significance-for-brain-functionality
#1
REVIEW
Femke S den Boon, R Angela Sarabdjitsingh
The hypothalamo-pituitary-adrenal (HPA) axis comprises interactions between the hypothalamus, the pituitary and the adrenal glands and its activation results in the release of corticosteroid hormones. Corticosteroids are secreted from the adrenal gland in a distinct 24-h circadian rhythm overarching an ultradian rhythm, which consists of hourly corticosteroid pulses exposing target tissues to rapidly changing steroid levels. On top of these rhythms surges can take place after stress. HPA-axis rhythms promote adaptation to predictable (i...
October 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29220883/association-of-adrenal-hormone-metabolites-and-mortality-over-a-6-year-follow-up-in-copd-patients-with-acute-exacerbation
#2
Seline Zurfluh, Manuela Nickler, Manuel Ottiger, Christian Steuer, Alexander Kutz, Mirjam Christ-Crain, Werner Zimmerli, Robert Thomann, Claus Hoess, Christoph Henzen, Luca Bernasconi, Andreas Huber, Beat Mueller, Philipp Schuetz
BACKGROUND: The release of hormones from the adrenal gland is vital in acute and chronic illnesses such as chronic obstructive pulmonary disease (COPD) involving recurrent exacerbations. Using a metabolomic approach, we aim to investigate associations of different adrenal hormone metabolites with short- and long-term mortality in COPD patients. METHODS: We prospectively followed 172 COPD patients (median age 75 years, 62% male) from a previous Swiss multicenter trial...
December 7, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29212952/dysregulated-aldosterone-secretion-in-persons-of-african-descent-with-endothelin-1-gene-variants
#3
Jia W Tan, Tina Gupta, Worapaka Manosroi, Tham M Yao, Paul N Hopkins, Jonathan S Williams, Gail K Adler, Jose R Romero, Gordon H Williams
Compared with persons of European descent (ED), persons of African descent (AD) have lower aldosterone (ALDO) levels, with the assumption being that the increased cardiovascular disease (CVD) risk associated with AD is not related to ALDO. However, the appropriateness of the ALDO levels for the volume status in AD is unclear. We hypothesized that, even though ALDO levels are lower in AD, they are inappropriately increased, and therefore, ALDO could mediate the increased CVD in AD. To test this hypothesis, we analyzed data from HyperPATH - 1,788 individuals from the total cohort and 765 restricted to ED-to-AD in a 2:1 match and genotyped for the endothelin-1 gene (EDN1)...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29202493/health-related-quality-of-life-and-mental-health-in-primary-aldosteronism-a-systematic-review
#4
Marieke S Velema, Aline H de Nooijer, Vivian W G Burgers, Ad R M M Hermus, Henri J L M Timmers, Jacques W M Lenders, Olga Husson, Jaap Deinum
The aim of this review was to determine the impact of primary aldosteronism on health-related quality of life (HRQoL) and mental health. We performed a systematic literature search up to July 2017 in six electronic databases. First, we screened the articles derived from this search based on title and abstract. Second, the selected studies were systematically reviewed and checked for our predefined inclusion criteria. The search yielded 753 articles, of which 15 studies met our inclusion criteria. Untreated patients with primary aldosteronism showed an impaired physical and mental HRQoL as compared to the general population...
December 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/29196758/the-role-of-oxidative-stress-in-the-crosstalk-between-leptin-and-mineralocorticoid-receptor-in-the-cardiac-fibrosis-associated-with-obesity
#5
Josué Gutiérrez-Tenorio, Gema Marín-Royo, Ernesto Martínez-Martínez, Rubén Martín, María Miana, Natalia López-Andrés, Raquel Jurado-López, Isabel Gallardo, María Luaces, José Alberto San Román, María González-Amor, Mercedes Salaices, María Luisa Nieto, Victoria Cachofeiro
We have investigated whether mineralocorticoid receptor activation can participate in the profibrotic effects of leptin in cardiac myofibroblasts, as well as the potential mechanisms involved. The presence of eplerenone reduced the leptin-induced increase in protein levels of collagen I, transforming growth factor β, connective tissue growth factor and galectin-3 and the levels of both total and mitochondrial of superoxide anion (O2.-) in cardiac myofibroblasts. Likewise, the MEK/ERK inhibitor, PD98059, and the PI3/Akt inhibitor, LY294002, showed a similar pattern...
December 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29194050/update-on-the-management-of-acute-heart-failure
#6
Erin Rayner-Hartley, Sean Virani, Mustafa Toma
PURPOSE OF REVIEW: We provide a concise review of recent studies focusing on the management of patients with acute heart failure (AHF). RECENT FINDINGS: In well designed randomized trials, no mortality benefit has been observed with the use of diuretics, ultrafiltration, inotropes and vasodilators in AHF. Recent trials examining the role of novel inotropes and vasodilators as well as the role of mineralocorticoid receptor antagonists in the AHF population, is reviewed...
November 30, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29192956/initial-clinical-experience-with-the-first-drug-sacubitril-valsartan-in-a-new-class-arnis-in-patients-with-heart-failure-with-reduced-left-ventricular-ejection-fraction-in-poland
#7
Marta Kałużna-Oleksy, Jolanta Kolasa, Jacek Migaj, Agnieszka Pawlak, Małgorzata Lelonek, Jadwiga Nessler, Ewa Straburzyńska-Migaj
Sacubitril/valsartan is the first drug from a new class of angiotensin receptor neprilisin inhibitors (ARNIs) recommended in the new European Society of Cardiology's guidelines instead of ACEIs, or ARBs (angiotensin receptor antagonists) used if ACEIs are not tolerated, for further reduction in the risk of hospitalisation or death in outpatients with HFrEF if symptoms continue despite optimal treatment with ACEIs/ARBs, betablockers and MRAs (mineralocorticoid antagonists). The aim of this paper is to present the initial experience with regard to the effectiveness, tolerance and safety of sacubitril/valsartan in the outpatient cardiology practice in Poland...
December 1, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/29191401/comparative-profiling-of-adrenal-steroids-in-maternal-and-umbilical-cord-blood
#8
Simon Travers, Laetitia Martinerie, Pascal Boileau, Qiong-Yao Xue, Marc Lombès, Eric Pussard
Fetal steroidome in late pregnancy receives multiple contributions from both maternal and fetal adrenals as well as from placenta. Depressed glucocorticoid levels have been reported in fetal blood at birth, yet studies on mineralocorticoid pathways are sparse. To investigate biosynthesis pathways at birth, adrenal steroids profiles were established in paired mothers and neonates. Forty-six paired healthy term newborns and their mothers from the Aldo cohort were assessed. Steroidomic profiles of mineralocorticoids, glucocorticoids and adrenal androgens were established from umbilical cord and maternal blood at birth using a highly sensitive and specific LC-MS/MS methodology...
November 27, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29183646/a-risk-score-to-predict-the-absence-of-left-ventricular-reverse-remodeling-implications-for-the-timing-of-icd-implantation-in-primary-prevention
#9
Jordi Pérez-Rodon, Enrique Galve, Carmen Pérez-Bocanegra, Teresa Soriano-Sánchez, Jesús Recio-Iglesias, Eva Domingo-Baldrich, Mila Alzola-Guevara, Ignacio Ferreira-González, Josep Ramon Marsal, Aida Ribera-Solé, Laura Gutierrez García-Moreno, Luz María Cruz-Carlos, Nuria Rivas-Gandara, Ivo Roca-Luque, Jaume Francisco-Pascual, Artur Evangelista-Masip, Àngel Moya-Mitjans, David García-Dorado
BACKGROUND: A prophylactic implantable cardioverter defibrillator (ICD) in patients with heart failure and reduced left ventricular ejection fraction (HFrEF) is only indicated when left ventricular ejection fraction (LVEF) reassessment remains ≤35% after 3-6 months on optimal pharmacological therapy. However, LVEF may not improve during this period and the patient may be exposed to an unnecessary risk of sudden cardiac death. This study aimed to determine the incidence and predictors of the absence of left ventricular reverse remodeling (LVRR) after pharmacological treatment optimization in patients with HFrEF to design a risk score of absence of LVRR...
November 25, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/29180348/phenotype-genotype-spectrum-of-aaa-syndrome-from-western-india-and-systematic-review-of-literature
#10
Hiren Patt, Katrin Koehler, Sailesh Lodha, Swati Jadhav, Chaitanya Yerawar, Angela Huebner, Kunal Thakkar, Sneha Arya, Sandhya Nair, Manjunath Goroshi, Hosahithlu Ganesh, Vijaya Sarathi, Anurag Lila, Tushar Bandgar, Nalini Shah
OBJECTIVE: To study genotype-phenotype spectrum of triple A syndrome (TAS). METHODS: Retrospective chart analysis of Indian TAS patients (cohort 1, n = 8) and review of genotyped TAS cases reported in world literature (cohort 2, n = 133, 68 publications). RESULTS: Median age at presentation was 4.75 years (range: 4-10) and 5 years (range: 1-42) for cohorts 1 and 2, respectively. Alacrima, adrenal insufficiency (AI), achalasia and neurological dysfunction (ND) were seen in 8/8, 8/8, 7/8 and 4/8 patients in cohort 1, and in 99, 91, 93 and 79% patients in cohort 2, respectively...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29179200/stress-kinase-regulation-of-task-1-and-task-3
#11
Susanne Rinné, Aytug K Kiper, Constanze Schmidt, Beatriz Ortiz-Bonnin, Simone Zwiener, Guiscard Seebohm, Niels Decher
BACKGROUND/AIMS: TASK channels belong to the two-pore-domain potassium (K2P) channel family. TASK-1 is discussed to contribute to chronic atrial fibrillation (AFib) and has been together with uncoupling protein 1 found as a marker protein of brown adipose tissue (BAT) fat. In addition, TASK-1 was linked in a genome-wide association study to an increased body mass index. A recent study showed that TASK-1 inhibition is causing obesity in mice by a BAT whitening and that these effects are linked to the mineralocorticoid receptor pathway, albeit the mechanism remained elusive...
November 27, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29178328/mineralocorticoid-receptor-blockade-improves-glucocorticoid-induced-skin-atrophy-but-partially-ameliorates-anti-inflammatory-actions-in-an-irritative-model-in-human-skin-explants
#12
Julia Boix, Van Tuan Nguyen, Nicolette Farman, Sélim Aractingi, Paloma Pérez
We recently demonstrated that blockade of the mineralocorticoid receptor (MR) effectively ameliorated GC-induced skin atrophy in healthy human skin explants and epidermal MR knock-out mice. However, whether MR blockade improves the therapeutic index of GCs in skin pathology was not investigated. We assessed the effects of GCs, MR antagonists (MRA), or both, in SDS-treated human skin explants. All treatments restored SDS-augmented epidermal thickness but only GC plus MRA restored the expression of COL1A1. However, MRA alone or in combination with GCs may exert a dual role in regulating inflammatory cytokines...
November 27, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/29167167/cellular-mechanisms-underlying-obesity-induced-arterial-stiffness
#13
Annayya R Aroor, Guanghong Jia, James R Sowers
Obesity is an emerging pandemic driven by consumption of a diet rich in high fat and high refined carbohydrates (western diet [WD]) and a sedentary life style in both children and adults. There is mounting evidence that arterial stiffness in obesity is an independent and strong predictor of adverse cardiovascular disease (CVD), cognitive functional decline and chronic kidney disease. Cardiovascular stiffness is a precursor to systolic hypertension, cardiac diastolic dysfunction, impairment of coronary and cerebral blood flow, and atherosclerosis...
November 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29167038/oral-contraceptives-positively-affect-mood-in-healthy-pms-free-women-a-longitudinal-study
#14
Danielle A Hamstra, E Ronald de Kloet, Mischa de Rover, Willem Van der Does
OBJECTIVE: Menstrual cycle phase and oral contraceptives (OC) use influence mood and cognition and these effects may be moderated by the mineralocorticoid receptor (MR) genotype. The effect of menstrual cycle phase on mood may be increased if participants know that this is the focus of study. We assessed aspects associated with reproductive depression such as mood, interpersonal sensitivity, affect lability and depressive cognitions in MR-genotyped OC-users and naturally cycling (NC) women in a carefully masked design...
December 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29164516/mineralocorticoid-receptor-antagonism-protects-the-aorta-from-vascular-smooth-muscle-cell-proliferation-and-collagen-deposition-in-a-rat-model-of-adrenal-aldosterone-producing-adenoma
#15
Yongji Yan, Chao Wang, Yiqin Lu, Huijie Gong, Zhun Wu, Xin Ma, Hongzhao Li, Baojun Wang, Xu Zhang
The number of patients with adrenal aldosterone-producing adenomas (APAs) has gradually increased. However, even after adenoma resection, some patients still suffer from high systolic blood pressure (SBP), which is possibly due to great arterial remodeling. Moreover, mineralocorticoid receptors (MRs) were found to be expressed in vascular smooth muscle cells (VSMCs). This study aims to determine whether MR antagonism protects the aorta from aldosterone-induced aortic remolding. Male rats were subcutaneously implanted with an osmotic minipumps and randomly divided into four groups: control; aldosterone (1 μg/h); aldosterone plus a specific MR antagonist, eplerenone (100 mg/kg/day); and aldosterone plus a vasodilator, hydralazine (25 mg/kg/day)...
November 21, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29156052/primary-adrenal-insufficiency-managing-mineralocorticoid-replacement-therapy
#16
Daniela Esposito, Daniela Pasquali, Gudmundur Johannsson
Context: Mineralocorticoid (MC) replacement therapy in patients with primary adrenal insufficiency (PAI) was introduced more than 60 years ago. Still, there are limited data on how MC substitution should be optimized, since MC dosing regimens have only been systematically investigated in a few studies. We review the management of current standard MC replacement therapy in PAI and its plausible impact on outcome. Evidence Acquisition: Using PubMed, we conducted a systematic review of the literature from 1939 to 2017, with the following keywords: 'adrenal insufficiency', 'mineralocorticoid deficiency', 'aldosterone', 'cardiovascular disease', 'hypertension', and 'heart failure'...
November 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29154427/design-of-a-multicentre-randomized-controlled-trial-to-assess-the-safety-and-efficacy-of-dose-titration-by-specialized-nurses-in-patients-with-heart-failure-etific-study-protocol
#17
Juana Oyanguren, LLuisa García-Garrido, Magdalena Nebot Margalef, Iñaki Lekuona, Josep Comin-Colet, Nicolás Manito, Julia Roure, Pilar Ruiz Rodriguez, Cristina Enjuanes, Pedro Latorre, Jesús Torcal Laguna, Susana García-Gutiérrez
AIMS: Heart failure (HF) is associated with many hospital admissions and relatively high mortality, rates decreasing with administration of beta-blockers (BBs), angiotensin-converting-enzyme inhibitors, angiotensin II receptor blockers, and mineralocorticoid receptor antagonists. The effect is dose dependent, suboptimal doses being common in clinical practice. The 2012 European guidelines recommend close monitoring and dose titration by HF nurses. Our main aim is to compare BB doses achieved by patients after 4 months in intervention (HF nurse-managed) and control (cardiologist-managed) groups...
November 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/29154425/influence-of-renal-impairment-on-aldosterone-status-calcium-metabolism-and-vasopressin-activity-in-outpatients-with-systolic-heart-failure
#18
Helle Bosselmann, Niels Tonder, György Sölétormos, Freja Gaborit, Kasper Rossing, Kasper Iversen, Jens Peter Goetze, Finn Gustafsson, Morten Schou
AIMS: Renal dysfunction (RD) is associated with increased morbidity and mortality in heart failure (HF). At present, no specific treatment for patients with RD, to prevent progression of HF, has been developed. How different hormone axes-and thereby potential treatment options-are affected by RD in HF warrants further investigations. METHODS AND RESULTS: Patients with left ventricular ejection fraction (LVEF) <0.45% were enrolled prospectively from an outpatient HF clinic...
November 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/29150654/primary-aldosteronism-patients-show-skin-alterations-and-abnormal-activation-of-glucocorticoid-receptor-in-keratinocytes
#19
Julia Boix, Judit Bigas, Lisa M Sevilla, Maurizio Iacobone, Marilisa Citton, Francesca Torresan, Brasilina Caroccia, Gian Paolo Rossi, Paloma Pérez
Primary aldosteronism (PA) is a disease characterized by high aldosterone levels caused by benign adrenal tumors being the most frequent cause of secondary hypertension. Aldosterone plays vital physiological roles through the mineralocorticoid receptor (MR) but in certain cell types, it can also activate the glucocorticoid (GC) receptor (GR). Both MR and GR are structurally and functionally related and belong to the same family of ligand-dependent transcription factors that recognize identical GC regulatory elements (GREs) on their target genes...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29149346/novel-pathways-of-endocrine-disruption-through-pesticides-interference-with-human-mineralocorticoid-receptors
#20
Jianyun Zhang, Xin Huang, Hongling Liu, Weiping Liu, Jing Liu
Mineralocorticoid receptor (MR) is one member of the steroid receptor family. In addition to its important role in Na+/K+ homeostasis, MR is reported as a tumor-suppressor in carcinogenesis. So far, little was known about the ability of pesticides to interfere with MR. In this study, a total of 43 pesticides and/or metabolites were investigated for their potential effects on human MR. None of the tested pesticides exhibited MR agonistic potency, while 16 compounds showed antagonistic activities. Further investigations indicated that these 16 chemicals individually antagonized aldosterone-induced alkaline phosphatase expression in vascular smooth muscle cells and aldosterone-inhibited hepatocellular carcinoma cell proliferation at higher concentrations, and the mixture of these 16 pesticides at environmentally relevant concentrations significantly disrupted MR activity...
November 15, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
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