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Adrenal hormones

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https://www.readbyqxmd.com/read/28938481/vesicular-glutamate-transporter-1-knockdown-in-infralimbic-prefrontal-cortex-augments-neuroendocrine-responses-to-chronic-stress-in-male-rats
#1
Brent Myers, Jessica M McKlveen, Rachel Morano, Yvonne M Ulrich-Lai, Matia B Solomon, Steven P Wilson, James P Herman
Chronic stress-associated pathologies frequently associate with alterations in the structure and activity of medial prefrontal cortex (mPFC). However, the influence of infralimbic cortex (IL) projection neurons on HPA axis activity is unknown, as is the involvement of these cells in chronic stress-induced endocrine alterations. In the current study, a lentiviral-packaged vector coding for a small interfering RNA (siRNA) targeting vesicular glutamate transporter 1 (vGluT1) mRNA was microinjected into the IL of male rats...
July 25, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938475/modeling-the-sex-differences-and-inter-individual-variability-in-the-activity-of-the-hypothalamic-pituitary-adrenal-axis
#2
Rohit T Rao, Ioannis P Androulakis
Significant sex differences exist in the activity of the hypothalamic-pituitary-adrenal (HPA) axis. These differences are thought to contribute to the disparity in the prevalence of various autoimmune and infectious diseases between males and females. We use a mathematical model of the HPA axis to evaluate the hypothesis that differential sensitivity and negative feedback of the HPA axis network are causal factors for the observed sex differences in its activity. In doing so, we implicitly account for the differential influence of gonadal hormones on the HPA axis...
August 31, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938470/genetic-disruption-of-21-hydroxylase-in-zebrafish-causes-interrenal-hyperplasia
#3
Helen Eachus, Andreas Zaucker, James A Oakes, Aliesha Griffin, Meltem Weger, Tülay Güran, Angela Taylor, Abigail Harris, Andy Greenfield, Jonathan L Quanson, Karl-Heinz Storbeck, Vincent T Cunliffe, Ferenc Müller, Nils Krone
Congenital adrenal hyperplasia is a group of common inherited disorders leading to glucocorticoid deficiency. Most cases are caused by 21-hydroxylase deficiency (21OHD). The systemic consequences of imbalanced steroid hormone biosynthesis due to severe 21OHD remains poorly understood. Therefore, we have developed a zebrafish model for 21OHD, which focuses on the impairment of glucocorticoid biosynthesis. A single 21-hydroxylase gene (cyp21a2) is annotated in the zebrafish genome based on sequence homology. Our in silico analysis of the Cyp21a2 protein sequence suggests a sufficient degree of similarity for the usage of zebrafish cyp21a2 to model aspects of human 21OHD in vivo...
September 13, 2017: Endocrinology
https://www.readbyqxmd.com/read/28937015/chronic-noise-exposure-in-the-spontaneously-hypertensive-rat
#4
Anne T M Konkle, Stephen E Keith, James P McNamee, David Michaud
INTRODUCTION: Epidemiological studies have suggested an association between the relative risk for developing cardiovascular disease (CVD) and long-term exposure to elevated levels of transportation noise. The contention is that this association is largely owing to an increase in stress-related biomarkers that are thought to be associated with CVD. Animal models have demonstrated that acute noise exposure is capable of triggering a stress response; however, similar studies using chronic noise models are less common...
September 2017: Noise & Health
https://www.readbyqxmd.com/read/28932767/patient-specific-workup-of-adrenal-incidentalomas
#5
REVIEW
Romy R de Haan, Johannes B R Visser, Ewoud Pons, Richard A Feelders, Uzay Kaymak, M G Myriam Hunink, Jacob J Visser
PURPOSE: : To develop a clinical prediction model to predict a clinically relevant adrenal disorder for patients with adrenal incidentaloma. MATERIALS AND METHODS: : This retrospective study is approved by the institutional review board, with waiver of informed consent. Natural language processing is used for filtering of adrenal incidentaloma cases in all thoracic and abdominal CT reports from 2010 till 2012. A total of 635 patients are identified. Stepwise logistic regression is used to construct the prediction model...
2017: European Journal of Radiology Open
https://www.readbyqxmd.com/read/28932185/hyperactivity-of-hypothalamic-pituitary-adrenal-axis-due-to-dysfunction-of-the-hypothalamic-glucocorticoid-receptor-in-sigma-1-receptor-knockout-mice
#6
Tingting Di, Suyun Zhang, Juan Hong, Tingting Zhang, Ling Chen
Sigma-1 receptor knockout (σ1R-KO) mice exhibit a depressive-like phenotype. Because σ1R is highly expressed in the neuronal cells of hypothalamic paraventricular nuclei (PVN), this study investigated the influence of σ1R deficiency on the regulation of the hypothalamic-pituitary-adrenocortical (HPA) axis. Here, we show that the levels of basal serum corticosterone (CORT), adrenocorticotropic hormone (ACTH) and corticotrophin releasing factor (CRF) as well as the level of CRF mRNA in PVN did not significantly differ between adult male σ1R-KO mice and wild-type (WT) mice...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28924064/circulating-steroid-hormone-variations-throughout-different-stages-of-prostate-cancer
#7
Gido Snaterse, Jenny A Visser, Wiebke Arlt, Johannes Hofland
Steroid hormones play a central role in the maintenance and progression of prostate cancer. The androgen receptor is the primary driver of tumor cell proliferation and is activated by the androgens testosterone and 5α-dihydrotestosterone. Inhibition of this pathway through medical or surgical castration improves survival in the majority of advanced prostate cancer patients. However, conversion of adrenal androgen precursors and alternative steroidogenic pathways have been found to contribute to tumor progression and resistance to treatment...
September 18, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28920935/spinal-cord-injury-induced-immunodeficiency-is-mediated-by-a-sympathetic-neuroendocrine-adrenal-reflex
#8
Harald Prüss, Andrea Tedeschi, Aude Thiriot, Lydia Lynch, Scott M Loughhead, Susanne Stutte, Irina B Mazo, Marcel A Kopp, Benedikt Brommer, Christian Blex, Laura-Christin Geurtz, Thomas Liebscher, Andreas Niedeggen, Ulrich Dirnagl, Frank Bradke, Magdalena S Volz, Michael J DeVivo, Yuying Chen, Ulrich H von Andrian, Jan M Schwab
Acute spinal cord injury (SCI) causes systemic immunosuppression and life-threatening infections, thought to result from noradrenergic overactivation and excess glucocorticoid release via hypothalamus-pituitary-adrenal axis stimulation. Instead of consecutive hypothalamus-pituitary-adrenal axis activation, we report that acute SCI in mice induced suppression of serum norepinephrine and concomitant increase in cortisol, despite suppressed adrenocorticotropic hormone, indicating primary (adrenal) hypercortisolism...
September 18, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28919755/synthetic-high-density-lipoprotein-nanodisks-for-targeted-withalongolide-delivery-to-adrenocortical-carcinoma
#9
Rui Kuai, Chitra Subramanian, Peter T White, Barbara N Timmermann, James J Moon, Mark S Cohen, Anna Schwendeman
Adrenocortical carcinoma (ACC) is a rare endocrine malignancy and has a 5-year survival rate of <35%. ACC cells require cholesterol for steroid hormone production, and this requirement is met via expression on the cell surface of a high level of SRB1, responsible for the uptake of high-density lipoproteins (HDLs), which carry and transport cholesterol in vivo. Here, we describe how this natural lipid carrier function of SRB1 can be utilized to improve the tumor-targeted delivery of a novel natural product derivative - withalongolide A 4,19,27-triacetate (WGA-TA) - which has shown potent antitumor efficacy, but poor aqueous solubility...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28919607/impact-of-adrenocortical-insufficiency-on-clinical-parameters-in-haemodynamically-stable-cirrhotic-patients-with-ascites
#10
H Ahmed, M R Karim, R K Paul, M Chowdhury, M S Alam, A Saha, F Rahman, M A Rouf
Cirrhosis has many complications regardless of the aetiology. Complications include splenomegaly, ascites, hepatic encephalopathy, spontaneous bacterial peritonitis, hepatorenal syndrome and hepatocellular carcinoma and also linked to abnormalities in the endocrine system, including abnormal sex hormone metabolism, thyroid disease, osteoporosis, and, most recently identified, adrenal insufficiency. This prospective cohort study was done to evaluate the impact of adrenocortical insufficiency on clinical parameters in haemodynamically stable cirrhotic patients with ascites and had been performed at the inpatient of GHPD Department, BIRDEM, Dhaka, Bangladesh from April 2011 to March 2012...
July 2017: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/28919553/social-evaluative-threat-with-verbal-performance-feedback-alters-neuroendocrine-response-to-stress
#11
Jenny M Phan, Ekaterina Schneider, Jeremy Peres, Olga Miocevic, Vanessa Meyer, Elizabeth A Shirtcliff
Laboratory stress tasks such as the Trier Social Stress Test (TSST) have provided a key piece to the puzzle for how psychosocial stress impacts the hypothalamic-pituitary-adrenal axis, other stress-responsive biomarkers, and ultimately wellbeing. These tasks are thought to work through biopsychosocial processes, specifically social evaluative threat and the uncontrollability heighten situational demands. The present study integrated an experimental modification to the design of the TSST to probe whether additional social evaluative threat, via negative verbal feedback about speech performance, can further alter stress reactivity in 63 men and women...
September 15, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28918360/do-bacteria-shape-our-development-crosstalk-between-intestinal-microbiota-and-hpa-axis
#12
REVIEW
Carolina de Weerth
The human body contains as many bacteria in the intestine as the total number of human body cells. These bacteria have a central position in human health and disease, and would also play a role in the regulation of emotions, behavior, and even higher cognitive functions. The Hypothalamic-Pituitary-Adrenal axis (HPA axis) is a major physiological stress system that produces cortisol. This hormone is involved in responding to environmental stress and also shapes many aspects of brain development. Both the HPA axis and the intestinal microbiota show rapid and profound developmental changes during the first years of life...
September 13, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28915118/delayed-diagnosis-of-proopiomelanocortin-pomc-deficiency-with-type-1-diabetes-in-a-9-year-old-girl-and-her-infant-sibling
#13
Elif Ozsu, Allison Bahm
BACKGROUND: Proopiomelanocortin (POMC) protein, encoded by the POMC gene, is the precursor of adrenocorticotropic hormone (ACTH) that is released from the anterior pituitary gland. Homozygous mutations in the POMC gene is associated with hyperphagia, severe and early-onset obesity, adrenal insufficiency, hypopigmentation of the skin and red hair. CASE PRESENTATION: A 9-year-old girl from a consanguineous family of Iraqi origin was diagnosed with type 1 diabetes...
September 15, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28913489/cerebral-salt-wasting-syndrome-in-patients-with-minor-head-trauma-two-case-reports
#14
Gabriela Csipak, Natalia Hagau
We describe two polytrauma patients without severe head trauma who developed Cerebral Salt Wasting Syndrome (CSWS) during their stay in our ICU with natriuresis, hyponatremia and hypovolemia. Hyponatremia encountered in CSWS and the syndrome of inadequate antidiuretic hormone secretion (SIADH) is a common electrolyte finding in patients with severe head trauma, subarachnoid hemorrhage, malignancy and infections of the central nervous system. CSWS was an unexpected electrolyte finding in our patients with minor head trauma without neurological or neurosurgical problems...
October 2016: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28912247/mir-212-mediates-counter-regulation-on-crh-expression-and-hpa-axis-activity-in-male-mice
#15
Yuxiao Tang, Xingjian Cai, Hongwei Zhang, Hui Shen, Wanyin Wang, Zhilei Shen, Wei Gu, Changquan Ling, Min Li
The mechanisms of hypothalamic-pituitary-adrenal (HPA) axis regulation have been studied persistently but still are not elucidated. Considering the emerging roles of microRNA in stress response, we conducted a microRNA microarray in mice hypothalamus to identify the potential role of microRNAs in regulating the HPA axis. In total, 41 microRNAs changed during heat stress, in which we found that miR-212 contains binding sequence with corticotropin-releasing hormone (CRH) 3'UTR according to sequence analysis. We observed that miR-212 expression in the hypothalamus was escalated by repeated heat and restraint stress...
September 14, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28911811/an-intergenerational-effect-of-neuroendocrine-metabolic-programming-alteration-induced-by-prenatal-ethanol-exposure-in-rats
#16
Hao Kou, Lang Shen, Han-Wen Luo, Liao-Bin Chen, Dong-Fang Wu, Hui Wang
Prenatal ethanol exposure (PEE) induces hypothalamic-pituitary-adrenal (HPA) axis-related neuroendocrine metabolic programming alteration in the first generation (F1) rats. In this study, the HPA hormones and glucose/lipid phenotypes under basal state and stressed condition induced by a fortnight ice-water swimming were examined in F2 to verify the intergenerational effect. Under the basal state, serum corticosterone (CORT) and glucose of some PEE groups were lowered while those of serum triglycerides (TG) were increased comparing with controls...
September 11, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28911179/deciphering-the-function-of-the-blunt-circadian-rhythm-of-melatonin-in-the-newborn-lamb-impact-on-adrenal-and-heart
#17
Maria Seron-Ferre, Claudia Torres-Farfan, Francisco J Valenzuela, Sebastian Castillo-Galan, Auristela Rojas, Natalia Mendez, Henry Reynolds, Guillermo J Valenzuela, Anibal J Llanos
Neonatal lambs, as with human and other neonates, have low arrhythmic endogenous levels of melatonin for several weeks until they start their own pineal rhythm of melatonin production at approximately 2 weeks of life. During pregnancy, daily rhythmic transfer of maternal melatonin to the fetus has important physiological roles in sheep, nonhuman primates, and rats. This melatonin rhythm provides a circadian signal and also participates in adjusting the physiology of several organs in preparation for extrauterine life...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28911133/kisspeptin-is-a-novel-regulator-of-human-fetal-adrenocortical-development-and-function-a-finding-with-important-implications-for-the-human-fetoplacental-unit
#18
Harshini Katugampola, Peter J King, Sumana Chatterjee, Muriel Meso, Andrew J Duncan, John C Achermann, Leo Guasti, Lea Ghataore, Norman F Taylor, Rebecca Allen, Shemoon Marlene, Joseph Aquilina, Ali Abbara, Channa N Jaysena, Waljit S Dhillo, Leo Dunkel, Ulla Sankilampi, Helen L Storr
Context: The human fetal adrenal (HFA) is an integral component of the fetoplacental unit and important for the maintenance of pregnancy. Low kisspeptin levels during pregnancy are associated with miscarriage, and kisspeptin and its receptor are expressed in the HFA. However, the role of kisspeptin in fetal adrenal function remains unknown. Objective: To determine the role of kisspeptin in the developing HFA. Design: Experiments using H295R and primary HFA cells as in vitro models of the fetal adrenal...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28904054/a-13-steroid-serum-panel-based-on-lc-ms-ms-use-in-detection-of-adrenocortical-carcinoma
#19
David R Taylor, Lea Ghataore, Lewis Couchman, Royce P Vincent, Ben Whitelaw, Dylan Lewis, Salvador Diaz-Cano, Gabriele Galata, Klaus-Martin Schulte, Simon Aylwin, Norman F Taylor
BACKGROUND: Adrenocortical carcinoma (ACC) is a rare malignancy, with an annual incidence of 1 or 2 cases per million. Biochemical diagnosis is challenging because up to two-thirds of the carcinomas are biochemically silent, resulting from de facto enzyme deficiencies in steroid hormone biosynthesis. Urine steroid profiling by GC-MS is an effective diagnostic test for ACC because of its capacity to detect and quantify the increased metabolites of steroid pathway synthetic intermediates...
September 13, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28903616/circulating-dehydroepiandrosterone-sulphate-decreases-even-with-a-slight-change-in-oestradiol
#20
Sumika Matsui, Toshiyuki Yasui, Kana Kasai, Kanako Yoshida, Takeshi Kato, Hirokazu Uemura, Akira Kuwahara, Toshiya Matsuzaki, Minoru Irahara
The aim of this study was to determine the effect of hormone replacement therapy (HRT) on changes in circulating dehydroepiandrosterone-sulphate (DHEA-S) with focus on the relationship between oestrogen level and change in DHEA-S. Forty-two women were enrolled in this longitudinal study. Nineteen women received oral oestradiol and twenty-three women received transdermal oestradiol continuously. Twenty women received progesterone continuously except for women who had undergone hysterectomy. Circulating oestradiol, follicle-stimulating hormone, luteinising hormone and DHEA-S levels before and at 3 months after commencement of HRT were measured...
September 14, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
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