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https://www.readbyqxmd.com/read/28719014/bioavailability-and-tolerability-of-nebulised-dexamethasone-sodium-phosphate-in-adult-horses
#1
A D Haspel, S Giguère, K A Hart, L J Berghaus, J L Davis
BACKGROUND: Nebulisation of the injectable dexamethasone sodium phosphate (DSP) would offer an inexpensive way of delivering a potent corticosteroid directly to the lungs of horses with asthma. However, this approach would be advantageous only if systemic absorption is minimal and if the preservatives present in the formulation do not induce airway inflammation. OBJECTIVE: To investigate the bioavailability of nebulised DSP and to determine whether it induces airway inflammation or hypothalamic-pituitary-adrenal (HPA) axis suppression in healthy adult horses...
July 18, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28718999/resilience-is-decreased-in-irritable-bowel-syndrome-and-associated-with-symptoms-and-cortisol-response
#2
S H Park, B D Naliboff, W Shih, A P Presson, E J Videlock, T Ju, L Kilpatrick, A Gupta, E A Mayer, L Chang
BACKGROUND: Irritable bowel syndrome (IBS) is a stress-sensitive disorder associated with early adverse life events (EALs) and a dysregulated hypothalamic-pituitary-adrenal (HPA) axis. Resilience is the ability to recover and adapt positively to stress but has not been well studied in IBS. The aims of this study are to compare resilience in IBS and healthy controls (HCs) and to assess its relationships with IBS symptom severity, quality of life (QOL), EALs, and HPA axis response. METHODS: Two hundred fifty-six subjects (154 IBS, 102 HCs) completed questionnaires for resilience (Connor-Davidson Resilience Scale [CD-RISC] and Brief Resilience Scale [BRS]), IBS symptoms, IBS-QOL, and EALs...
July 18, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28718507/gene-expression-analyses-reveal-metabolic-specifications-in-acute-o2-sensing-chemoreceptor-cells
#3
Lin Gao, Victoria Bonilla-Henao, Paula García-Flores, Ignacio Arias-Mayenco, Patricia Ortega-Sáenz, José López-Barneo
Acute O2 sensing is a fundamental property of cells in the peripheral chemoreceptors, e.g. glomus cells in the carotid body (CB) and chromaffin cells in the adrenal medulla (AM), and is necessary for adaptation to hypoxia. These cells contain O2 -sensitive ion channels, which mediate membrane depolarization and transmitter release upon exposure to hypoxia. However, the mechanisms underlying the detection of changes in O2 tension by cells are still poorly understood. Recently, we suggested that CB glomus cells have specific metabolic features that favour the accumulation of reduced quinone and the production of mitochondrial NADH and reactive oxygen species during hypoxia...
July 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28717330/an-experimental-evaluation-of-adaptogenic-potential-of-standardized-epipremnum-aureum-leaf-extract
#4
Sreemoy Kanti Das, Pinaki Sengupta, Mohd Shahimi Mustapha, Md Moklesur Rahman Sarker
BACKGROUND: Stress is a normal part of everyday life but chronic stress can lead to a variety of stress-related illnesses including hypertension, anxiety, and depression. In the present investigation, standardized leaf extract of Epipremnumaureum was evaluated for its anti-stress potential. MATERIALS AND METHODS: For the evaluation of anti-stress activity, groups of mice (n = 6) were subjected to forced swim stress and anoxic stress tolerance test in mice 1h after daily treatment of E...
April 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/28716938/dynamic-responses-of-the-adrenal-steroidogenic-regulatory-network
#5
Francesca Spiga, Eder Zavala, Jamie J Walker, Zidong Zhao, John R Terry, Stafford L Lightman
The hypothalamic-pituitary-adrenal axis is a dynamic system regulating glucocorticoid hormone synthesis in the adrenal glands. Many key factors within the adrenal steroidogenic pathway have been identified and studied, but little is known about how these factors function collectively as a dynamic network of interacting components. To investigate this, we developed a mathematical model of the adrenal steroidogenic regulatory network that accounts for key regulatory processes occurring at different timescales...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28715822/long-term-cortisol-concentration-in-scalp-hair-of-asthmatic-children-using-inhaled-corticosteroids-a-case-control-study
#6
Maaike P Smit, Ed H G van Leer, Gerard Noppe, Yolanda B de Rijke, Dieneke Kramer van Driel, Erica L T van den Akker
INTRODUCTION: Inhaled corticosteroids (ICS) can interfere with the hypothalamic-pituitary-adrenal (HPA) axis and may lead to adrenal insufficiency, resulting in a decrease of cortisol production. Cortisol levels measured in scalp hair provide a marker for long-term cortisol exposure. Data regarding hair cortisol concentration (HCC) in asthmatic children with ICS therapy are scarce. The aim of this study is to compare HCC in asthmatic children under ICS treatment with a healthy control group...
July 14, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28715387/a-modified-trier-social-stress-test-for-vulnerable-mexican-american-adolescents
#7
Megan M Johnson, Julianna Deardorff, Kimberly Parra, Abbey Alkon, Brenda Eskenazi, Elizabeth Shirtcliff
The Trier Social Stress Test (TSST) is a well validated and widely used social stressor that has been shown to induce a 2-4 fold increase in cortisol, the biological output produced by the Hypothalamic-Pituitary-Adrenal (HPA) axis in humans. While studies have explored how modifications to the TSST influence stress responsivity, few studies have created a modified TSST appropriate for vulnerable youth that elicits a significant cortisol stress response. Thus, the current study sought to modify or adjust the TSST in a culturally sensitive way for a vulnerable sample of 14 year-old adolescents...
July 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28714388/the-prospective-role-of-micrornas-in-depression
#8
Zhiying Hu, Yuting Jiang, Xue Huo, Yang Yang, Henry Davies, Benson O A Botchway, Marong Fang
Depression is a debilitating disease that is affecting a growing number of patients both physically and mentally. In addition to the mood changes, depression causes cognitive impairment, including learning and memory dysfunction. Although depression studies have been going on for decades, the underlying mechanism still remains unclear. MicroRNAs (miRNAs), a type of small non-coding RNAs, predominantly control the expression of their target mRNAs to exert their functions. Some evidence has revealed the importance of miRNAs in the mechanism of depression though the studies are still in their infancy...
July 14, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28713963/sexual-dimorphism-of-frailty-and-cognitive-impairment-potential-underlying-mechanisms-review
#9
Qingwei Ruan, Grazia D'onofrio, Tao Wu, Antonio Greco, Daniele Sancarlo, Zhuowei Yu
The aim of the present study was to assess systematically gender differences in susceptibility to frailty and cognitive performance decline, and the underlying mechanisms. A systematic assessment was performed of the identified reviews of cohort, mechanistic and epidemiological studies. The selection criteria of the present study included: i) Sexual dimorphism of frailty, ii) sexual dimorphism of subjective memory decline (impairment) and atrophy of hippocampus during early life, iii) sexual dimorphism of late‑onset Alzheimer's disease and iv) sexual dimorphism mechanisms underlying frailty and cognitive impairment...
July 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28713603/adrenal-ganglioneuroblastoma-in-adults-a-case-report-and-review-of-the-literature
#10
Stefano Benedini, Giorgia Grassi, Carmen Aresta, Antonietta Tufano, Luca Fabio Carmignani, Barbara Rubino, Livio Luzi, Sabrina Corbetta
Incidentally discovered adrenal masses are very common given the increased number of imaging studies performed in recent years. We here report a clinical case of a 20-year-old woman who presented with left flank pain. Ultrasound examination revealed a contralateral adrenal mass, which was confirmed at computed tomography (CT) scan. Hormonal hypersecretion was excluded. Given the size (11 × 10 × 7 cm) and the uncertain nature of the mass, it was surgically removed and sent for pathological analyses. Conclusive diagnosis was ganglioneuroblastoma...
2017: Case Reports in Endocrinology
https://www.readbyqxmd.com/read/28713097/-drug-induced-changes-in-adrenal-cortex-function
#11
Robert Krysiak, Karolina Kowalcze, Bogusław Okopień
Glucocorticoids, commonly used in the treatment of various disorders, particularly if administered at high doses, may lead to the development of iatrogenic Cushing's syndrome, being by far the most common iatrogenic disorder of the adrenal gland. In some cases, however, adrenal cortex function may be affected by other drugs and risk of the development of various clinical entities is dependent on the drug, its dose, as well as on the duration of the treatment. This risk is also related to the baseline function of this gland...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28712091/contribution-of-genetic-factors-to-lower-dheas-in-patients-with-rheumatoid-arthritis
#12
Lucia Vernerova, Martina Mravcova, Lucia Paulikova, Miroslav Vlcek, Andrea Marko, Milada Meskova, Adela Penesova, Jozef Rovensky, Juraj Wendl, Katarina Raslova, Branislav Vohnout, Ivana Jochmanova, Ivica Lazurova, Zdenko Killinger, Guenter Steiner, Josef Smolen, Richard Imrich
OBJECTIVE: Lower production of adrenal androgens has been confirmed in females with rheumatoid arthritis (RA); however, the mechanisms of this finding are not completely understood. The aim of our study was to assess the contribution of genetic factors associated with variability of dehydroepiandrosterone sulfate (DHEAS) levels to lower DHEAS in female RA patients. METHODS: 448 RA and 648 healthy controls were genotyped for single-nucleotide polymorphisms (SNPs) in genes ZKSCAN5 (rs11761528), SULT2A1 (rs2637125), HHEX (rs2497306), and ARPC1A (rs740160)...
July 15, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28711608/do-anabolic-androgenic-steroids-have-performance-enhancing-effects-in-female-athletes
#13
REVIEW
Grace Huang, Shehzad Basaria
Doping with anabolic androgenic steroids (AAS) is common among both male and female athletes and is a growing public health problem. Review of historical data of systematic state-sponsored doping programs implemented by the German Democratic Republic in elite female athletes and from the clinical trials of testosterone administration in non-athlete women suggests that AAS have ergogenic effects in women. The use of AAS in female athletes has been associated with adverse effects that include acne, hirsutism, deepening of the voice and menstrual disturbances; life-threatening adverse effects such as cardiac arrhythmias and sudden death have also been reported...
July 12, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28710634/obtaining-of-11%C3%AE-hydroxyandrost-4-ene-3-17-dione-from-natural-sterols
#14
Dmitry Dovbnya, Sergey Khomutov, Vyacheslav Kollerov, Marina V Donova
Two-step one-pot microbial transformation enables obtaining of valuable steroids that are difficult to produce chemically. Here we describe a method for obtaining 11α-hydroxyandrost-4-ene-3,17-dione (11α-HAD) from cheap and available natural sterols (phytosterols or cholesterol).11α-HAD is a primary adrenal steroid in mammals and also a key precursor in the syntheses of halogenated corticoids. Conventional routes for its obtaining are based on chemical synthesis, or microbial hydroxylation of androst-4-ene-3,17-dione (AD)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28710520/psychostimulants-and-forced-swim-stress-interaction-how-activation-of-the-hypothalamic-pituitary-adrenal-axis-and-stress-induced-hyperglycemia-are-affected
#15
Humberto Gagliano, Juan Antonio Ortega-Sanchez, Roser Nadal, Antonio Armario
RATIONALE: We recently reported that simultaneous exposure to amphetamine and various stressors resulted in reduced hypothalamic-pituitary-adrenal (HPA) and glycemic responses to the stressors. Since this is a new and relevant phenomenon, we wanted to further explore this interaction. OBJECTIVES: This study aims (i) to characterize the effect of various doses of amphetamine on the physiological response to a predominantly emotional stressor (forced swim) when the drug was given immediately before stress; (ii) to study if an interaction appears when the drug was given 30 min or 7 days before swim; and (iii) to know whether cocaine causes similar effects when given just before stress...
July 14, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28710078/endocrinology-and-the-brain-corticotropin-releasing-hormone-signaling
#16
Carolina Inda, Natalia G Armando, Paula A Dos Santos Claro, Susana Silberstein
Corticotropin-releasing hormone (CRH) is a key player of basal and stress activated responses in the hypothalamic-pituitary-adrenal axis (HPA) and in extrahypothalamic circuits, where it functions as a neuromodulator to orchestrate humoral and behavioral adaptive responses to stress. This review describes molecular components and cellular mechanisms involved in CRH signaling downstream of its G protein-coupled receptors (GPCRs) CRHR1 and CRHR2, and summarizes recent findings that challenge the classical view of GPCR signaling, and impact on our understanding of CRHRs function...
July 14, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28709905/royal-jelly-decreases-corticosterone-levels-and-improves-the-brain-antioxidant-system-in-restraint-and-cold-stressed-rats
#17
Renata Roland Teixeira, Adriele Vieira de Souza, Leonardo Gomes Peixoto, Helen Lara Machado, Douglas Carvalho Caixeta, Danielle Diniz Vilela, Nathalia Belele Baptista, Celso Rodrigues Franci, Foued Salmen Espindola
Restraint and cold stress induces the hypothalamic-pituitary-adrenal (HPA) axis to release corticosterone from the adrenal gland, which can worsen the antioxidant defense system in the central nervous system. Here, we investigated the corticosterone levels and the antioxidant defense system in the cerebellum and brain, as well as in its isolated regions, such as cerebral cortex, striatum and hippocampus of stressed rats supplemented with royal jelly (RJ). Wistar rats were supplemented with RJ for 14days and the stress induction started on the 7th day...
July 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28708774/identifying-unilateral-disease-in-chinese-patients-with-primary-aldosteronism-by-using-a-modified-prediction-score
#18
Ying Zhang, Wenquan Niu, Fangfang Zheng, Hua Zhang, Wenlong Zhou, Zhoujun Shen, Jianzhong Xu, Xiaofeng Tang, Jin Zhang, Ping-Jin Gao, Ji-Guang Wang, Limin Zhu
OBJECTIVE: The current study aimed to evaluate the role of Küpers' score in predicting unilateral aldosteronism, and develop a modified score in Chinese patients with primary aldosteronism. METHODS: The current retrospective study included 406 patients with primary aldosteronism who underwent successful adrenal venous sampling (AVS) and were divided into the unilateral (n = 211) and bilateral (n = 195) groups according to the AVS results. Normokalemia was noted in both the unilateral (n = 64) and bilateral groups (n = 84) when plasma and urinary aldosterone were measured...
July 13, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28708736/mifepristone-plasma-level-and-glucocorticoid-receptor-antagonism-associated-with-response-in-patients-with-psychotic-depression
#19
Thaddeus Block, Georgios Petrides, Harvey Kushner, Ned Kalin, Joseph Belanoff, Alan Schatzberg
BACKGROUND: Psychotic depression has no Food and Drug Administration-approved treatment. Patients demonstrate significant dysregulation of the hypothalamic-pituitary-adrenal axis providing a biologically targeted treatment opportunity. The purpose of this study was to explore the clinical and biological effects of short-duration (7-day) glucocorticoid receptor antagonism with mifepristone and the role of mifepristone plasma levels in patients with psychotic depression. METHODS: This double-blind, randomized study took place at 34 US clinical research centers and included patients with a diagnosis of Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, major depressive disorder, severe, with psychotic features...
July 13, 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28708669/the-role-of-hypothalamic-inflammation-the-hypothalamic-pituitary-adrenal-axis-and-serotonin-in-the-cancer-anorexia-cachexia-syndrome
#20
Klaske van Norren, Jvalini T Dwarkasing, Renger F Witkamp
PURPOSE OF REVIEW: In cancer patients, the development of cachexia (muscle wasting) is frequently aggravated by anorexia (loss of appetite). Their concurrence is often referred to as anorexia-cachexia syndrome. This review focusses on the recent evidence underlining hypothalamic inflammation as key driver of these processes. Special attention is given to the involvement of hypothalamic serotonin. RECENT FINDINGS: The anorexia-cachexia syndrome is directly associated with higher mortality in cancer patients...
July 13, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
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