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https://www.readbyqxmd.com/read/28731983/a-systematic-review-and-meta-analysis-of-the-effort-reward-imbalance-model-of-workplace-stress-and-hpa-axis-measures-of-stress
#1
Pennie Eddy, Eleanor H Wertheim, Matthew W Hale, Bradley J Wright
OBJECTIVE: The association between effort reward imbalance (ERI) and various health outcomes has been well-documented over the past 20 years, but the mechanisms responsible for this association remain unclear. The present meta-analysis assessed the associations of ERI and over-commitment (OC) in the workplace with hypothalamic-pituitary-adrenal (HPA) axis measures. METHODS: Electronic databases were searched with the phrase 'effort*reward*imbalance' which yielded 319 studies leading to 56 full text studies being screened...
July 20, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28730418/total-and-free-cortisol-levels-during-1-%C3%AE-g-25-%C3%AE-g-and-250-%C3%AE-g-cosyntropin-stimulation-tests-compared-to-insulin-tolerance-test-results-of-a-randomized-prospective-pilot-study
#2
Seenia Peechakara, James Bena, Nigel J Clarke, Michael J McPhaul, Richard E Reitz, Robert J Weil, Pablo Recinos, Laurence Kennedy, Amir H Hamrahian
PURPOSE: The appropriate cosyntropin dose during cosyntropin stimulation tests remains uncertain. We conducted a prospective, randomized pilot study to compare 1 μg IV low dose cosyntropin test, 25 μg IM medium dose cosyntropin test, and 250 μg IM standard dose cosyntropin test to evaluate secondary adrenal insufficiency. Insulin tolerance test was used as the gold standard. METHOD: The study included patients with hypothalamic/pituitary disease (n  = 10) with at least one pituitary axis deficiency other than ACTH deficiency and controls (n  = 12)...
July 20, 2017: Endocrine
https://www.readbyqxmd.com/read/28729344/exogenous-stress-hormones-alter-energetic-and-nutrient-costs-of-development-and-metamorphosis
#3
Lucas J Kirschman, Marshall D McCue, Justin G Boyles, Robin W Warne
Variation in environmental conditions during larval life stages can shape development during critical windows and have lasting effects on the adult organism. Changes in larval developmental rates in response to environmental conditions, for example, can trade-off with growth to determine body size and condition at metamorphosis, which can affect adult survival and fecundity. However, it is unclear how use of energy and nutrients shape trade-offs across life stage transitions because no studies have quantified these costs of larval development and metamorphosis...
July 20, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28728884/glucocorticoid-programming-of-neuroimmune-function
#4
REVIEW
David J Walker, Karen A Spencer
Throughout life physiological systems strive to maintain homeostasis and these systems are susceptible to exposure to maternal or environmental perturbations, particularly during embryonic development. In some cases, these perturbations may influence genetic and physiological processes that permanently alter the functioning of these physiological systems; a process known as developmental programming. In recent years, the neuroimmune system has garnered attention for its fundamental interactions with key hormonal systems, such as the hypothalamic pituitary adrenal (HPA) axis...
July 17, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28723608/breastfeeding-and-the-gut-brain-axis-is-there-a-role-for-melatonin
#5
REVIEW
George Anderson, Cathy Vaillancourt, Michael Maes, Russel J Reiter
The benefits of breastfeeding over formula feed are widely appreciated. However, for many mothers breastfeeding is not possible, highlighting the need for a significant improvement in the contents of formula feed. In this article, the overlooked role of melatonin and the melatonergic pathways in breast milk and in the regulation of wider breast milk components are reviewed. There is a growing appreciation that the benefits of breastfeeding are mediated by its effects in the infant gut, with consequences for the development of the gut-brain axis and the immune system...
July 19, 2017: Biomolecular Concepts
https://www.readbyqxmd.com/read/28721596/central-adrenal-insufficiency-following-traumatic-brain-injury-a-missed-diagnosis-in-the-critically-injured
#6
Eileen Fan, Peter W Skippen, Michael A Sargent, David D Cochrane, Jean-Pierre Chanoine
BACKGROUND: High-dose steroid administration is no longer recommended in the treatment of acute traumatic brain injury (TBI) as it failed to prove beneficial in improving patients' outcome. However, a masked benefit of steroid administration in TBI management was that it provided corticosteroid replacement therapy in patients with TBI-related central adrenal insufficiency. CASE PRESENTATION: We report the case of a 12-year-old boy who suffered a severe TBI from a motor vehicle accident that resulted in complete deficiency of anterior pituitary function...
July 18, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28720593/vitamin-a-endocrine-tissues-and-hormones-interplay-and-interactions
#7
Julie Brossaud, Veronique Pallet, Jean-Benoit Corcuff
Vitamin A (retinol) is a micronutrient critical for cell proliferation and differentiation. In adults, vitamin A and metabolites such as retinoic acid (RA) play major roles in vision, immune and brain functions, and tissue remodelling and metabolism. This review presents the physiological interactions of retinoids and endocrine tissues and hormonal systems. Two endocrine systems have been particularly studied. In the pituitary, retinoids targets the corticotrophs with a possible therapeutic use in corticotropinomas...
July 18, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28720554/is-there-an-association-between-cortisol-and-hypertension-in-overweight-or-obese-children
#8
Aleid Jg Wirix, Martijn Jj Finken, Ines A Von Rosenstiel-Jadoul, Annemieke C Heijboer, Jeroen Nauta, Jaap W Groothoff, Mai Jm Chinapaw, Joana E Kist-Van Holthe
OBJECTIVE: The precise mechanisms behind the development of hypertension in overweight or obese children are not yet completely understood. Alterations in hypothalamus-pituitary-adrenal axis activity may play a role. We aimed to investigate if there is an association between cortisol parameters and hypertension in overweight or obese children. METHODS: Random urine (n=180) and early-morning saliva samples (n=126) for assessment of cortisol and cortisone were collected from 1) hypertensive overweight children (n=50); 2) normotensive overweight children (n=145) and 3) normotensive non-overweight children (n=75)...
July 17, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28720298/steroids-steroid-precursors-and-neuroactive-steroids-in-critically-ill-equine-neonates
#9
K A Dembek, K J Timko, L M Johnson, K A Hart, B S Barr, B David, T A Burns, R E Toribio
Hypothalamic-pituitary-adrenal axis (HPAA) dysfunction has been associated with sepsis and mortality in foals. Most studies have focused on cortisol, while other steroids have not been investigated. The objectives of this study were to characterise the adrenal steroid and steroid precursor response to disease and to determine their association with the HPAA response to illness, disease severity, and mortality in hospitalised foals. All foals (n=326) were classified by two scoring systems into three categories: based on the sepsis score (septic, sick non-septic [SNS] and healthy) and the foal survival score (Group 1: 3-18%; Group 2: 38-62%; Group 3: 82-97% likelihood of survival)...
July 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28720027/long-term-alteration-of-the-hypothalamic-pituitary-adrenal-axis-in-children-undergoing-cardiac-surgery-in-the-first-6-months-of-life
#10
Monica McGauran, Brigid Jordan, Roseriet Beijers, Irma Janssen, Candice Franich-Ray, Carolina de Weerth, Michael Cheung
Children with congenital heart disease (CHD) have poorer neurodevelopmental and psychological outcomes. The mechanisms underlying this remain unclear. One mechanism could be that the stressful experience of cardiac surgery early in life influences long-term hypothalamic-pituitary-adrenal (HPA) axis regulation. Dysregulation of the HPA axis has been linked to poorer neurocognitive and psychological outcomes in other study populations. This case-control study aims to compare HPA-axis regulation (circadian rhythm and reactivity) using salivary cortisol in 3- to 5-year-olds with CHD who did and did not have cardiac surgery prior to 6 months of age...
July 18, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28719014/bioavailability-and-tolerability-of-nebulised-dexamethasone-sodium-phosphate-in-adult-horses
#11
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
#12
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/28716938/dynamic-responses-of-the-adrenal-steroidogenic-regulatory-network
#13
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
#14
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
#15
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
#16
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
#17
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/28710520/psychostimulants-and-forced-swim-stress-interaction-how-activation-of-the-hypothalamic-pituitary-adrenal-axis-and-stress-induced-hyperglycemia-are-affected
#18
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
#19
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
#20
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
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