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Corticotropin releasing (factor OR hormone)

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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
#1
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/28734867/p-q-type-voltage-gated-calcium-channels-mediate-the-ethanol-and-crf-sensitivity-of-central-amygdala-gabaergic-synapses
#2
F P Varodayan, M L Logrip, M Roberto
The central amygdala (CeA) GABAergic system is hypothesized to drive the development of alcohol dependence, due to its pivotal roles in the reinforcing actions of alcohol and the expression of negative emotion, anxiety and stress. Recent work has also identified an important role for the CeA corticotropin-releasing factor (CRF) system in the interaction between anxiety/stress and alcohol dependence. We have previously shown that acute alcohol and CRF each increase action potential-independent GABA release in the CeA via their actions at presynaptic CRF type 1 receptors (CRF1s); however, the shared mechanism employed by these two compounds requires further investigation...
July 19, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28734797/the-effects-pf-continuously-acoustical-stress-on-cortisol-in-milkfish-chanos-chanos
#3
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 (109 dB re 1 μPa / 125.4 Hz; approx. 10-100m distant from the wind farm) or noisy (138 dB re 1 μPa / 125.4 Hz; nearby the wind farm) conditions for 24 hr, 3 days and 1 week. Comparing to the control group (80 dB re 1 μPa / 125...
July 19, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28725939/escalated-cocaine-binges-in-rats-enduring-effects-of-social-defeat-stress-or-intra-vta-crf
#4
Michael Z Leonard, Joseph F DeBold, Klaus A Miczek
RATIONALE: Exposure to intermittent social defeat stress elicits corticotropin releasing factor (CRF) release into the VTA and induces long-term modulation of mesocorticolimbic dopamine activity in rats. These adaptations are associated with an intense cocaine-taking phenotype, which is prevented by CRF receptor antagonists. OBJECTIVE: The present studies examine whether infusion of CRF into the VTA is sufficient to escalate cocaine-taking behavior, in the absence of social defeat experience...
July 18, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28711193/nociceptin-receptors-in-alcohol-use-disorders-a%C3%A2-positron-emission-tomography-study-using-11-c-nop-1a
#5
Rajesh Narendran, Roberto Ciccocioppo, Brian Lopresti, Jennifer Paris, Michael L Himes, N Scott Mason
BACKGROUND: The neuropeptide transmitter nociceptin, which binds to the nociceptin/orphanin FQ peptide (NOP) receptor, is a core component of the brain's antistress system. Nociceptin exerts its antistress effect by counteracting the functions of corticotropin-releasing factor, the primary stress-mediating neuropeptide in the brain. Basic investigations support a role for medications that target nociceptin receptors in the treatment of alcohol use disorders. Thus, it is of high interest to measure the in vivo status of NOP receptors in individuals with alcohol use disorders...
May 31, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28710078/endocrinology-and-the-brain-corticotropin-releasing-hormone-signaling
#6
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/28705713/sn003-a-crf1-receptor-antagonist-attenuates-depressive-like-behavior-and-detrusor-overactivity-symptoms-induced-by-13-cis-retinoic-acid-in-rats
#7
Andrzej Wróbel, Urszula Doboszewska, Ewa Rechberger, Piotr Wlaź, Tomasz Rechberger
Overactive bladder (OAB) often co-exists with depression in women. The corticotropin-releasing factor (CRF) system participates in the pathophysiology of both disorders. Therefore, we tested the effects of acute treatment with a reversible CRF receptor type-1 (CRF1) antagonist, SN003 (1mg/kg, i.v.), representatives of first (solifenacin, 0.03mg/kg, i.v.) and second (mirabegron, 1mg/kg, i.v.) line treatments for OAB as well as an antidepressant imipramine (30mg/kg, i.p.) on changes in depressive-like behavior and detrusor overactivity (DO) symptoms induced by a 6-week administration of 13-cis-retinoic acid (13-cis-RA, 1mg/kg/day, i...
July 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28704719/biochemical-and-functional-analysis-of-corticotropin-releasing-factor-purified-from-an-aqueous-extract-of-human-placenta-used-as-wound-healer
#8
Namrata Singh, Debasish Bhattacharyya
Human placental extract constitutes of innumerable therapeutically important components mostly used in wound healing arising from the skin and burn injuries. However, there is still some bioactive present in the placental extracts yet to be characterized to better under the complex process of wound healing mediated by the placental extract. In this study, the presence of corticotropin releasing factor (CRF) in an aqueous extract of human placenta was detected and quantified by dot blot and CRF-ELISA immunoassay kit respectively...
June 28, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28701349/actin-cytoskeleton-dependent-regulation-of-corticotropin-releasing-factor-receptor-heteromers
#9
Burcu Hasdemir, Shilpi Mahajan, Juan Oses-Prieto, Shreya Chand, Michael Woolley, Alma Burlingame, Dimitris K Grammatopoulos, Aditi Bhargava
Stress responses are highly nuanced and variable, but how this diversity is achieved by modulating receptor function, is largely unknown. Corticotropin-releasing factor receptors (CRFRs), class B GPCRs, are pivotal in mediating stress responses. Here we show that the two known CRFRs interact to form heteromeric complexes in HEK293 cells co-expressing both CRFRs and in vivo in mouse pancreas. Co-immunoprecipitation and mass spectrometry confirmed the presence of both CRF1R and CRF2βR, along with actin in these heteromeric complexes...
July 12, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28694438/stress-induces-more-serious-barrier-dysfunction-in-follicle-associated-epithelium-than-villus-epithelium-involving-mast-cells-and-protease-activated-receptor-2
#10
Lei Zhang, Jun Song, Tao Bai, Wei Qian, Xiao-Hua Hou
Psychological stress has been associated with intestinal epithelial hyperpermeability, the basic process in various functional and organic bowel diseases. In the present study, we aimed to clarify the differences and underlining mechanisms in stress-induced barrier disruption in functionally and structurally distinct epitheliums, including the villus epithelium (VE) and follicle-associated epithelium (FAE), a specialized epithelium overlaid the domes of Peyer's lymphoid follicles. Employing an Ussing Chamber system, the epithelial permeability was assessed in rats following water avoidance stress (WAS) in vivo and in mucosa tissues exposed to corticotropin-releasing factor (CRF) ex vivo...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694056/the-involvement-of-rhopr-crf-dh-in-feeding-and-reproduction-in-the-blood-gorging-insect-rhodnius-prolixus
#11
Shirin Mollayeva, Ian Orchard, Angela B Lange
Rhodnius prolixus is a blood-gorging insect and a vector for human Chagas disease. The insect transmits the disease following feeding, when it excretes urine and feces contaminated with the Trypanosoma cruzi parasite. A corticotropin-releasing factor-like peptide acts as a diuretic hormone in R. prolixus (Rhopr-CRF/DH); however, its distribution throughout the insect's central nervous system (CNS) and the expression of its receptor in feeding-related tissue as well as the female reproductive system suggests a multifaceted role for the hormone beyond that of diuresis...
July 7, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28690980/crh-affects-the-phenotypic-expression-of-sepsis-associated-virulence-factors-by-streptococcus-pneumoniae-serotype-1-in-vitro
#12
Colette G Ngo Ndjom, Lindsay V Kantor, Harlan P Jones
Sepsis is a life-threatening health condition caused by infectious pathogens of the respiratory tract, and accounts for 28-50% of annual deaths in the US alone. Current treatment regimen advocates the use of corticosteroids as adjunct treatment with antibiotics, for their broad inhibitory effect on the activity and production of pro-inflammatory mediators. However, despite their use, corticosteroids have not proven to be able to reverse the death incidence among septic patients. We have previously demonstrated the potential for neuroendocrine factors to directly influence Streptococcus pneumoniae virulence, which may in turn mediate disease outcome leading to sepsis and septic shock...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28689880/characterization-of-crf1-receptor-antagonists-with-differential-peripheral-vs-central-actions-in-crf-challenge-in-rats
#13
Maiko Tanaka, Yoshiro Tomimatsu, Katsuya Sakimura, Yoshikazu Ootani, Yuu Sako, Takuto Kojima, Kazuyoshi Aso, Takahiko Yano, Keisuke Hirai
The aim of this study was to investigate peripheral and central roles of corticotropin-releasing factor (CRF) in endocrinological and behavioral changes. Plasma adrenocorticotropin (ACTH) concentration was measured as an activity of hypothalamic-pituitary-adrenal (HPA) axis. As behavioral changes, locomotion and anxiety behavior were measured after CRF challenge intravenously (i.v.) for the peripheral administration or intracerebroventricularly (i.c.v.) for the central administration. Plasma ACTH concentration was significantly increased by both administration routes of CRF; however, hyperlocomotion and anxiety behavior were induced only by the i...
July 6, 2017: Peptides
https://www.readbyqxmd.com/read/28684600/frontline-science-corticotropin-releasing-factor-receptor-subtype-1-is-a-critical-modulator-of-mast-cell-degranulation-and-stress-induced-pathophysiology
#14
Saravanan Ayyadurai, Amelia J Gibson, Susan D'Costa, Elizabeth L Overman, Laura J Sommerville, Ashwini C Poopal, Emily Mackey, Yihang Li, Adam J Moeser
Life stress is a major risk factor in the onset and exacerbation of mast cell-associated diseases, including allergy/anaphylaxis, asthma, and irritable bowel syndrome. Although it is known that mast cells are highly activated upon stressful events, the mechanisms by which stress modulates mast cell function and disease pathophysiology remains poorly understood. Here, we investigated the role of corticotropin-releasing factor receptor subtype 1 (CRF1) in mast cell degranulation and associated disease pathophysiology...
July 6, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28674775/hypothalamo-pituitary-adrenal-axis-after-a-single-epidural-triamcinolone-injection
#15
Ali Iranmanesh, Dakshinamurty Gullapalli, Ravinder Singh, Johannes D Veldhuis
PURPOSE: To quantify adrenocorticotropin and cortisol secretion after epidural glucocorticoid injection. METHODS: Eight men (ages 25-63 year) were studied at baseline, 1, 4, and 12 weeks after triamcinolone (80 mg) injection epidurally. Adrenocorticotropin (pg/mL) and cortisol (µg/dL) were measured every 10 min for 4 h, and after Corticotropin-releasing hormone (CRH) (1 µg/kg) injection. RESULTS: Epidural triamcinolone markedly suppressed: (1) pre-CRH injection ACTH (from 18 ± 3...
August 2017: Endocrine
https://www.readbyqxmd.com/read/28672951/hypothalamic-pituitary-adrenal-axis-hypersensitivity-in-female-rats-on-a-post-weaning-high-fat-diet-after-chronic-mild-stress
#16
Lian Liu, Junqiang Yang, Feng Qian, Chengbiao Lu
A high-fat diet (HFD) is highly correlated to obesity, metabolic diseases and certain behavioral changes. However, the effects of post-weaning HFD in rats during puberty and the role of the hypothalamic-pituitary-adrenal (HPA) axis in this process have remained elusive. The present study hypothesized that the HPA axis mediates the behavioral alterations induced by a post-weaning HFD. To investigate this, female rats were divided into two groups, one of which was fed a HFD from postnatal weeks (PWs) 4-12, while the other group received standard chow...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28669757/a-peptidergic-circuit-links-the-circadian-clock-to-locomotor-activity
#17
Anna N King, Annika F Barber, Amelia E Smith, Austin P Dreyer, Divya Sitaraman, Michael N Nitabach, Daniel J Cavanaugh, Amita Sehgal
The mechanisms by which clock neurons in the Drosophila brain confer an ∼24-hr rhythm onto locomotor activity are unclear, but involve the neuropeptide diuretic hormone 44 (DH44), an ortholog of corticotropin-releasing factor. Here we identified DH44 receptor 1 as the relevant receptor for rest:activity rhythms and mapped its site of action to hugin-expressing neurons in the subesophageal zone (SEZ). We traced a circuit that extends from Dh44-expressing neurons in the pars intercerebralis (PI) through hugin+ SEZ neurons to the ventral nerve cord...
July 10, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28661068/expression-of-mir-18a-and-mir-34c-in-circulating-monocytes-associated-with-vulnerability-to-type-2-diabetes-mellitus-and-insulin-resistance
#18
Si-Si Wang, Yong-Qiang Li, Ying-Zhi Liang, Jing Dong, Yan He, Ling Zhang, Yu-Xiang Yan
Chronic stress may facilitate the development of metabolic disorders including insulin resistance (IR) and type 2 diabetes mellitus (T2DM). MiR-18a and miR-34c modulate central cell responsiveness to stress by targeting glucocorticoid receptor (GR) and corticotropin-releasing factor receptor type 1 (CRFR1) mRNA, which are important regulators of the hypothalamus-pituitary-adrenal (HPA) axis. This study explored the relationship between T2DM/IR and expression of miR-18a and miR-34c in peripheral blood mononuclear cells (PBMCs) in an occupational sample...
June 29, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28660550/clinical-and-economic-evaluation-of-repository-corticotropin-injection-a-narrative-literature-review-of-treatment-efficacy-and-healthcare-resource-utilization-for-seven-key-indications
#19
REVIEW
Michael Philbin, John Niewoehner, George J Wan
INTRODUCTION: Repository corticotropin injection (RCI; H.P. Acthar(®) Gel; Mallinckrodt Pharmaceuticals Inc., Hampton, NJ) is a highly purified, prolonged-release porcine preparation of adrenocorticotropic hormone (ACTH) analogue that is FDA-approved for treatment of 19 autoimmune and inflammatory disorders. The diverse physiological actions of RCI at the melanocortin receptors (MCRs) affect processes involved in inflammation, pigmentation, steroidogenesis, and immunomodulation. Although RCI has been approved to treat inflammatory and autoimmune diseases for more than 60 years, recent progress in understanding both MCRs and the effects of RCI in modulating immune responses has led to increased interest in RCI as a therapeutic choice...
June 28, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28658297/abnormal-dendritic-maturation-of-developing-cortical-neurons-exposed-to-corticotropin-releasing-hormone-crh-insights-into-effects-of-prenatal-adversity
#20
Megan M Curran, Curt A Sandman, Elysia Poggi Davis, Laura M Glynn, Tallie Z Baram
Corticotropin releasing hormone (CRH) produced by the hypothalamus initiates the hypothalamic-pituitary-adrenal (HPA) axis, which regulates the body's stress response. CRH levels typically are undetectable in human plasma, but during pregnancy the primate placenta synthesizes and releases large amounts of CRH into both maternal and fetal circulations. Notably, placental CRH synthesis increases in response to maternal stress signals. There is evidence that human fetal exposure to high concentrations of placental CRH is associated with behavioral consequences during infancy and into childhood, however the direct effects on of the peptide on the human brain are unknown...
2017: PloS One
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