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Corticotropin releasing hormone

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https://www.readbyqxmd.com/read/28808144/particulate-matter-exposure-and-stress-hormone-levels-a-randomized-double-blind-crossover-trial-of-air-purification
#1
Huichu Li, Jing Cai, Renjie Chen, Zhuohui Zhao, Zhekang Ying, Lin Wang, Jianmin Chen, Ke Hao, Patrick L Kinney, Honglei Chen, Haidong Kan
BACKGROUND: Exposure to ambient particulate matter (PM) is associated with a number of adverse health outcomes, but potential mechanisms are largely unknown. Metabolomics represents a powerful approach to study global metabolic changes in response to environmental exposures. We therefore conducted this study to investigate changes in serum metabolites in response to the reduction of PM exposure among healthy college students. METHODS: We conducted a randomized, double-blind crossover trial in 55 healthy college students in Shanghai, China...
August 15, 2017: Circulation
https://www.readbyqxmd.com/read/28804807/plasma-cortisol-response-cannot-be-classically-conditioned-in-a-taste-endocrine-paradigm-in-humans
#2
Liubov Petrakova, Karoline Boy, Marisa Kügler, Sven Benson, Harald Engler, Lars Möller, Manfred Schedlowski
RATIONALE: Peripheral immune responses can be modified by associative learning procedures. Less is known, however, whether and to what extent neuroendocrine parameters can be classically conditioned. OBJECTIVES: In this randomized double-blind study, we modified an established paradigm to behaviorally condition endocrine responses in humans. METHODS: Thirty-one healthy male participants received a distinctively flavored green drink as the conditioned stimulus (CS) and intravenous injections of corticotropin-releasing hormone (CRH) (CRH group, N = 17) or NaCl (placebo group, N = 14) as the unconditioned stimulus (US) during two subsequent acquisition trials...
August 13, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28797603/chronic-traumatic-stress-impairs-memory-in-mice-potential-roles-of-acetylcholine-neuroinflammation-and-corticotropin-releasing-factor-expression-in-the-hippocampus
#3
Ami Bhakta, Kartheek Gavini, Euitaek Yang, Lani Lyman-Henley, Kodeeswaran Parameshwaran
Chronic stress in humans can result in multiple adverse psychiatric and neurobiological outcomes, including memory deficits. These adverse outcomes can be more severe if each episode of stress is very traumatic. When compared to acute or short term stress relatively little is known about the effects of chronic traumatic stress on memory and molecular changes in hippocampus, a brain area involved in memory processing. Here we studied the effects of chronic traumatic stress in mice by exposing them to adult Long Evan rats for 28 consecutive days and subsequently analyzing behavioral outcomes and the changes in the hippocampus...
August 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28790896/a-quantitative-analysis-of-the-distribution-of-crh-neurons-in-whole-mouse-brain
#4
Jie Peng, Ben Long, Jing Yuan, Xue Peng, Hong Ni, Xiangning Li, Hui Gong, Qingming Luo, Anan Li
Corticotropin-releasing hormone (CRH), with widespread expression in the brain, plays a key role in modulating a series of behaviors, including anxiety, arousal, motor function, learning and memory. Previous studies have focused on some brain regions with densely distributed CRH neurons such as paraventricular hypothalamic nucleus (PVH) and bed nuclei of the stria terminalis (BST) and revealed some basic structural and functional knowledge of CRH neurons. However, there is no systematic analysis of brain-wide distribution of CRH neurons...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28790893/brain-and-peripheral-atypical-inflammatory-mediators-potentiate-neuroinflammation-and-neurodegeneration
#5
REVIEW
Duraisamy Kempuraj, Ramasamy Thangavel, Govindhasamy P Selvakumar, Smita Zaheer, Mohammad E Ahmed, Sudhanshu P Raikwar, Haris Zahoor, Daniyal Saeed, Prashant A Natteru, Shankar Iyer, Asgar Zaheer
Neuroinflammatory response is primarily a protective mechanism in the brain. However, excessive and chronic inflammatory responses can lead to deleterious effects involving immune cells, brain cells and signaling molecules. Neuroinflammation induces and accelerates pathogenesis of Parkinson's disease (PD), Alzheimer's disease (AD) and Multiple sclerosis (MS). Neuroinflammatory pathways are indicated as novel therapeutic targets for these diseases. Mast cells are immune cells of hematopoietic origin that regulate inflammation and upon activation release many proinflammatory mediators in systemic and central nervous system (CNS) inflammatory conditions...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28780891/vitamin-d-and-corticotropin-releasing-hormone-in-term-and-preterm-birth-potential-contributions-to-preterm-labor-and-birth-outcome
#6
Sara A Mohamed, Abdeljabar El Andaloussi, Ayman Al-Hendy, Ramkumar Menon, Faranak Behnia, Jay Schulkin, Michael L Power
BACKGROUND: Poor maternal vitamin D status and elevated circulating corticotropin-releasing hormone (CRH) are associated with preterm birth. It is not known if these risk factors are independent or interrelated. Both are associated with inflammation. METHODS: We measured maternal circulating 25-hydroxyvitamin D (25-OH-D) and CRH from 97 samples collected from 15 early-preterm, 31 late-preterm, 21 early-term, and 30 term births. The potential involvement of vitamin D in the regulation of inflammation was evaluated by Q-PCR in human uterine smooth muscle (UTSM) cell line...
August 7, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28776199/contribution-of-vesicular-glutamate-transporters-to-stress-response-and-related-psychopathologies-studies-in-vglut3-knockout-mice
#7
REVIEW
Hanga Réka Horváth, Csilla Lea Fazekas, Diána Balázsfi, Subodh Kumar Jain, József Haller, Dóra Zelena
Maintenance of the homeostasis in a constantly changing environment is a fundamental process of life. Disturbances of the homeostatic balance is defined as stress response and is induced by wide variety of challenges called stressors. Being the main excitatory neurotransmitter of the central nervous system glutamate is important in the adaptation process of stress regulating both the catecholaminergic system and the hypothalamic-pituitary-adrenocortical axis. Data are accumulating about the role of different glutamatergic receptors at all levels of these axes, but little is known about the contribution of different vesicular glutamate transporters (VGluT1-3) characterizing the glutamatergic neurons...
August 3, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28771403/structural-insight-into-the-activation-of-a-class-b-g-protein-coupled-receptor-by-peptide-hormones-in-live-human-cells
#8
Lisa Seidel, Barbara Zarzycka, Saheem A Zaidi, Vsevolod Katritch, Irene Coin
The activation mechanism of class B G-protein-coupled receptors (GPCRs) remains largely unknown. To characterize conformational changes induced by peptide hormones, we investigated interactions of the class B corticotropin-releasing factor receptor type 1 (CRF1R) with two peptide agonists and three peptide antagonists obtained by N-truncation of the agonists. Surface mapping with genetically encoded photo-crosslinkers and pair-wise crosslinking revealed distinct footprints of agonists and antagonists on the transmembrane domain (TMD) of CRF1R and identified numerous ligand-receptor contact sites, directly from the intact receptor in live human cells...
August 3, 2017: ELife
https://www.readbyqxmd.com/read/28765614/hierarchy-in-the-home-cage-affects-behaviour-and-gene-expression-in-group-housed-c57bl-6-male-mice
#9
Yasuyuki Horii, Tatsuhiro Nagasawa, Hiroyuki Sakakibara, Aki Takahashi, Akira Tanave, Yuki Matsumoto, Hiromichi Nagayama, Kazuto Yoshimi, Michiko T Yasuda, Kayoko Shimoi, Tsuyoshi Koide
Group-housed male mice exhibit aggressive behaviour towards their cage mates and form a social hierarchy. Here, we describe how social hierarchy in standard group-housed conditions affects behaviour and gene expression in male mice. Four male C57BL/6 mice were kept in each cage used in the study, and the social hierarchy was determined from observation of video recordings of aggressive behaviour. After formation of a social hierarchy, the behaviour and hippocampal gene expression were analysed in the mice. Higher anxiety- and depression-like behaviours and elevated gene expression of hypothalamic corticotropin-releasing hormone and hippocampal serotonin receptor subtypes were observed in subordinate mice compared with those of dominant mice...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28758220/distribution-and-chemical-composition-of-estrogen-receptor-%C3%AE-neurons-in-the-paraventricular-nucleus-of-the-female-and-male-mouse-hypothalamus
#10
Mario G Oyola, Maranda K Thompson, Aaron Z Handa, Robert J Handa
Activation of estrogen receptor beta (ERβ)-expressing neurons regulates the mammalian stress response via the hypothalamic-pituitary-adrenal (HPA) axis. These neurons densely populate the paraventricular nucleus of the hypothalamus (PVN). Recent research has revealed striking differences between rat and mouse PVN cytochemistry, but careful exploration of PVN ERβ neurons in mice has been hindered by a lack of specific ERβ antisera. Therefore, we used male and female transgenic mice expressing EGFP under the control of the mouse ERβ promoter (ERβ-EGFP) to examine the chemical architecture of PVN ERβ cells...
July 31, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28755509/the-changes-in-and-relationship-between-plasma-nitric-oxide-and-corticotropin-releasing-hormone-in-patients-with-major-depressive-disorder
#11
Yun-Rong Lu, Yan Zhang, Ying-Bo Rao, Xi Chen, Han-Fen Lou, Yu Zhang, Hai-Yan Xie, Ping Fang, Li-Wei Hu
Because there is strong evidence of roles of the hypothalamus-pituitary-adrenal axis and nitric oxide (NO) synthase-NO system in depression, but the relationship between them is unknown, the aim of this study was to elucidate whether there is any correlation between NO and corticotropin-releasing hormone (CRH) in major depressive disorder (MDD) patients. In 16 outpatients with MDD and 18 healthy controls, the plasma amino acids citrulline (Cit) and arginine (Arg) were determined by high-performance liquid chromatography, and CRH levels was measured by radioimmunoassay...
July 29, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28750490/secondary-adrenal-insufficiency-from-the-physiopathology-to-the-possible-role-of-modified-release-hydrocortisone-treatment
#12
Rosa M Paragliola, Salvatore M Corsello
Central adrenal insufficiency represents a life-threatening disorder that results from a reduced cortisol production due to an impairment production of adrenocorticotropic hormone. In particular, secondary AI results from pituitary disease that impedes the release of ACTH, while tertiary adrenal insufficiency is caused from an impaired synthesis of corticotropin-releasing hormone. Central adrenal insufficiency has an estimated prevalence of 150-280 per million, resulting more common than primary AI. Prompt diagnosis and management of this condition is crucial, but the diagnostic investigation can often be challenging, in particular in cases of recent onset of secondary adrenal insufficiency...
July 27, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/28750312/synthesis-of-2-imino-and-2-hydrazono-thiazolo-4-5-d-pyrimidines-as-corticotropin-releasing-factor-crf-antagonists
#13
Mohamed Teleb, Bhimanna Kuppast, Katerina Spyridaki, George Liapakis, Hesham Fahmy
Corticotropin-releasing factor (CRF) is an important neuropeptide hormone which controls the body's overall response to stress. It plays a crucial role in regulating the behavioral, cardiovascular, immune and gastrointestinal systems. Over-activation of the CRF system has been implicated in many disorders including anxiety, depression, drug addiction, hypertension, Irritable Bowel Syndrome (IBS), peptic ulcers, inflammation and others. Thus, binding of CRF to its receptors is an attractive target to develop new medications which aim at treating ailments associated with chronic stress...
July 18, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28750017/corticotropin-releasing-factor-receptor-1-modulates-biomarkers-of-dna-oxidation-in-alzheimer-s-disease-mice
#14
Cheng Zhang, Robert A Rissman
Increased production of hydroxyl radical is the main source of oxidative damage in mammalian DNA that accumulates in Alzheimer's disease (AD). Reactive oxygen species (ROS) react with both nuclear DNA (nDNA) and mitochondrial DNA (mtDNA) to generate 8-hydroxy-2'-deoxyguanosine (8-OHdG), both of which can be measured in the urine. Knowledge of this pathway has positioned measurement of urine 8-OHdG as a reliable index of DNA oxidation and a potential biomarker target for tracking early cellular dysfunction in AD...
2017: PloS One
https://www.readbyqxmd.com/read/28744978/the-role-of-prolactin-in-the-suppression-of-crh-mrna-expression-during-pregnancy-and-lactation-in-the-mouse
#15
Papillon Gustafson, Stephen Bunn, David R Grattan
Maternal stress is associated with negative health consequences for both the mother and her offspring. To prevent these adverse outcomes, activity of the hypothalamic-pituitary-adrenal (HPA) axis is attenuated during pregnancy and lactation. While the mechanisms generating this adaptive change have not been fully defined, the anterior pituitary hormone prolactin may play a significant role. This study investigated the role of prolactin in regulating the basal activity of the HPA axis during pregnancy and lactation in the mouse, focussing upon the corticotropin-releasing hormone (CRH) neurons...
July 26, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28744256/corticotropin-releasing-hormone-as-the-homeostatic-rheostat-of-feto-maternal-symbiosis-and-developmental-programming-in-utero-and-neonatal-life
#16
REVIEW
Viridiana Alcántara-Alonso, Pamela Panetta, Patricia de Gortari, Dimitris K Grammatopoulos
A balanced interaction between the homeostatic mechanisms of mother and the developing organism during pregnancy and in early neonatal life is essential in order to ensure optimal fetal development, ability to respond to various external and internal challenges, protection from adverse programming, and safeguard maternal care availability after parturition. In the majority of pregnancies, this relationship is highly effective resulting in successful outcomes. However, in a number of pathological settings, perturbations of the maternal homeostasis disrupt this symbiosis and initiate adaptive responses with unpredictable outcomes for the fetus or even the neonate...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28740098/puerarin-ameliorated-the-behavioral-deficits-induced-by-chronic-stress-in-rats
#17
Zhi-Kun Qiu, Guan-Hua Zhang, De-Sheng Zhong, Jia-Li He, Xu Liu, Ji-Sheng Chen, Da-Nian Wei
The present study aimed to investigate the mechanisms underlying the antidepressant-like effects of puerarin via the chronic unpredictable stress (CUS) procedure in rats. Similar to Sertraline (Ser), Chronic treatment of puerarin (60 and 120 mg/kg, i.g) elicited the antidepressant-like effects by reversing the decreased sucrose preference in sucrose preference test (SPT), by blocking the increased latency to feed in novelty-suppressed feeding test (NSFT) and the increased immobility time in forced swimming test (FST) without affecting locomotor activity...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735061/up-regulation-of-glur1-in-paraventricular-nucleus-and-greater-expressions-of-synapse-related-proteins-in-the-hypothalamus-of-chronic-unpredictable-stress-induced-depressive-rats
#18
Rong Li, Xia Zhao, Li Cai, Wan-Wan Gao
Converging evidence indicates that abnormal glutamatergic and synaptic systems may be associated with the pathophysiology of depression. Over-activation of corticotropin-releasing hormone (CRH) neurons in the hypothalamic paraventricular nucleus (PVN) plays a key role in the hypothalamic-pituitary-adrenal (HPA) axis hyperactivity and is a prominent feature in depression. In this study, we examined the effect of chronic unpredictable stress (CUS) in rats on the expression of AMPA subunit GluR1 protein in the hypothalamic PVN as well as on the expression of GluR1 and several synapse-related proteins in the hypothalamus...
July 19, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28734797/the-effects-of-continuously-acoustical-stress-on-cortisol-in-milkfish-chanos-chanos
#19
Chih An Wei, Tzu Hao Lin, Ruo Dong Chen, Yung-Che Tseng, Yi Ta Shao
Strong underwater acoustic noise has been known that may cause hearing loss and actual stress in teleost. However, the long-term physiological effects of relatively quiet but continuously noise on fish were less understood. In present study, milkfish, Chanos chanos, were exposed to the simulated-wind farm noise either quiet (109dB re 1μPa/125.4Hz; approx. 10-100m distant from the wind farm) or noisy (138dB re 1μPa/125.4Hz; nearby the wind farm) conditions for 24h, 3days and 1week. Comparing to the control group (80dB re 1μPa/125...
July 19, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28710078/endocrinology-and-the-brain-corticotropin-releasing-hormone-signaling
#20
REVIEW
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...
August 2017: Endocrine Connections
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