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corticotrophin releasing factor

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https://www.readbyqxmd.com/read/29671014/attenuated-cocaine-seeking-after-oxytocin-administration-in-male-and-female-rats
#1
Amy S Kohtz, Belle Lin, Michael E Smith, Gary Aston-Jones
RATIONALE: Initial drug abstinence (modeled here as Extinction Day 1, ED1) is a critical time point in the progression of addiction that is strongly influenced by stress and sex. ED1 induces corticosterone release in both sexes, and cocaine-seeking during ED1 can be mitigated by corticotrophin-releasing factor (CRF) antagonists more effectively in female rats. Oxytocin (OXT) is a neuropeptide that has several biological functions, including regulation of stress pathways. METHODS: To investigate a relationship between OXT, sex, and cocaine-seeking, we examined Fos on ED1 in OXT neurons of paraventricular (PVN) and supraoptic nuclei (SON) compared to homecage (cocaine experienced) or naïve male and female rats...
April 18, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29670001/epigenetic-programming-of-synthesis-release-and-or-receptor-expression-of-common-mediators-participating-in-the-risk-resilience-for-comorbid-stress-related-disorders-and-coronary-artery-disease
#2
REVIEW
Carlos Manuel Zapata-Martín Del Campo, Martín Martínez-Rosas, Verónica Guarner-Lans
Corticotrophin releasing factor, vasopressin, oxytocin, natriuretic hormones, angiotensin, neuregulins, some purinergic substances, and some cytokines contribute to the long-term modulation and restructuring of cardiovascular regulation networks and, at the same time, have relevance in situations of comorbid abnormal stress responses. The synthesis, release, and receptor expression of these mediators seem to be under epigenetic control since early stages of life, possibly underlying the comorbidity to coronary artery disease (CAD) and stress-related disorders (SRD)...
April 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29559223/effects-of-physical-exercise-on-food-intake-and-body-weight-role-of-dorsomedial-hypothalamic-signaling
#3
Ni Zhang, Sheng Bi
Physical activity or exercise contributes to energy balance via affecting energy expenditure and food intake, but how exercise affects food intake and the neural mechanism of the feeding effect of exercise remain to be determined. Growing evidence indicates that physical exercise exerts a distinct action in the control of food intake and body weight. Studies of exercise in rodent models with voluntary access to running wheels reveal an inhibitory effect of voluntary exercise on food intake and body weight. Voluntary running activity decreases food intake and body weight, prevents obesity, and slows down body weight regain...
March 17, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29498920/update-on-the-clinicopathology-of-pituitary-adenomas
#4
Chung Thong Lim, Márta Korbonits
Pituitary adenomas are the third most common central nervous system tumours and arise from the anterior pituitary within the pituitary fossa. The signs and symptoms of patients with pituitary adenomas vary from 'mass effects' caused by a large adenoma to features secondary to excess pituitary hormones produced by the functioning pituitary adenoma. Detailed histopathological assessment, based on novel classifications and the latest WHO guidelines, helps to categorise pituitary adenomas into different subtypes and identify features that, in some cases, help to predict their behaviour...
March 2, 2018: Endocrine Practice
https://www.readbyqxmd.com/read/29487539/impact-of-air-exposure-on-vasotocinergic-and-isotocinergic-systems-in-gilthead-sea-bream-sparus-aurata-new-insights-on-fish-stress-response
#5
Arleta K Skrzynska, Elisabetta Maiorano, Marco Bastaroli, Fatemeh Naderi, Jesús M Míguez, Gonzalo Martínez-Rodríguez, Juan M Mancera, Juan A Martos-Sitcha
The hypothalamus-pituitary-interrenal (HPI) and hypothalamus-sympathetic-chromaffin cell (HSC) axes are involved in the regulation of the stress response in teleost. In this regard, the activation of a complex network of endocrine players is needed, including corticotrophin-releasing hormone (Crh), Crh binding protein (Crhbp), proopiomelanocortin (Pomc), thyrotropin-releasing hormone (Trh), arginine vasotocin (Avt), and isotocin (It) to finally produce pleiotropic functions. We aimed to investigate, using the gilthead sea bream ( Sparus aurata ) as a biological model, the transcriptomic response of different endocrine factors ( crh, crhbp, pomc s, trh ), neuropeptides ( avt and it ), and their specific receptors ( avtrv1a, avtrv2 , and itr ) in four important target tissues (hypothalamus, pituitary, kidney and liver), after an acute stress situation...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29477954/corticotrophin-releasing-factor-receptor-1-antagonists-prevent-chronic-stress-induced-behavioral-changes-and-synapse-loss-in-aged-rats
#6
Hongxin Dong, Jack M Keegan, Ellie Hong, Christopher Gallardo, Janitza Montalvo-Ortiz, Becky Wang, Kenner C Rice, John Csernansky
Mounting evidence suggests that chronic stress can alter brain structure and function and promote the development of neuropsychiatric disorders, such as depression and Alzheimer's disease. Although the results of several studies have indicated that aged brains are more vulnerable to chronic stress, it remains unknown whether antagonists of a key stress regulator, the corticotrophin releasing factor receptor 1 (CRF1), can prevent stress-induced anxiety and memory deficits in animal models. In this study, we evaluated the potential benefits of two CRF1 antagonists, R121919 and antalarmin, for preventing stress-induced anxiety-related behavioral and memory deficits and neurodegeneration in aged rats...
February 19, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29468732/antidepressant-effects-of-dammarane-sapogenins-in-chronic-unpredictable-mild-stress-induced-depressive-mice
#7
Ning Jiang, Bei-Yue Zhang, Li-Ming Dong, Jing-Wei Lv, Cong Lu, Qiong Wang, Lin-Xi Fan, Hong-Xia Zhang, Rui-Le Pan, Xin-Min Liu
Depression is a common, dysthymic, and psychiatric disorder, resulting in enormous social and economic burden. Dammarane sapogenins (DS), an active fraction from oriental ginseng, has shown antidepressant-like effects in chronic restraint rats and sleep interruption-induced mice, and the present study aimed to further confirm the antidepressant effects of DS in a model of chronic unpredictable mild stress (CUMS) and to explore the underlying mechanism. Oral administration of DS (20, 40, and 80 mg/kg) markedly improved depressant-like behaviors, increasing the sucrose intake in the sucrose preference test and reducing the latency in the novelty-suppressed feeding test, and decreasing the immobility time in both the tail suspension and forced swimming tests, compared with the CUMS mice...
February 22, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29425286/central-neuropeptide-y-plays-an-important-role-in-mediating-the-adaptation-mechanism-against-chronic-stress-in-male-rats
#8
Yu Yang, Reji Babygirija, Jun Zheng, Bei Shi, Weinan Sun, Xiaojiao Zheng, Fan Zhang, Yu Cao
Exposure to continuous life stress often causes gastrointestinal (GI) symptoms. Studies have shown that neuropeptide Y (NPY) counteracts the biological actions of corticotrophin-releasing factor (CRF), and is involved in the termination of the stress response. However, in chronic repeated restraint stress (CRS) conditions, the actions of NPY on GI motility remain controversial. To evaluate the role of NPY in mediation of the adaptation mechanism and GI motility in CRS conditions, a CRS rat model was set up...
February 7, 2018: Endocrinology
https://www.readbyqxmd.com/read/29407532/the-involvement-of-crf1-receptor-within-the-basolateral-amygdala-and-dentate-gyrus-in-the-naloxone-induced-conditioned-place-aversion-in-morphine-dependent-mice
#9
E Valero, I Gómez-Milanés, P Almela, B Ribeiro Do Couto, M L Laorden, M V Milanés, C Núñez
Drug withdrawal-associated aversive memories trigger relapse to drug-seeking behavior. Corticotrophin-releasing factor (CRF) is an important mediator of the reinforcing properties of drugs of abuse. However, the involvement of CRF1 receptor (CRF1R) in aversive memory induced by opiate withdrawal has yet to be elucidated. We used the conditioned-place aversion (CPA) paradigm to evaluate the role of CRF1R on opiate withdrawal memory acquisition, along with plasticity-related processes that occur after CPA within the basolateral amygdala (BLA) and dentate gyrus (DG)...
January 30, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29383398/methamphetamine-withdrawal-induces-activation-of-crf-neurons-in-the-brain-stress-system-in-parallel-with-an-increased-activity-of-cardiac-sympathetic-pathways
#10
Juan Antonio García-Carmona, Polymnia Georgiou, Panos Zanos, Alexis Bailey, Maria Luisa Laorden
Methamphetamine (METH) addiction is a major public health problem in some countries. There is evidence to suggest that METH use is associated with increased risk of developing cardiovascular problems. Here, we investigated the effects of chronic METH administration and withdrawal on the activation of the brain stress system and cardiac sympathetic pathways. Mice were treated with METH (2 mg/kg, i.p.) for 10 days and left to spontaneous withdraw for 7 days. The number of corticotrophin-releasing factor (CRF), c-Fos, and CRF/c-Fos neurons was measured by immunohistochemistry in the paraventricular nucleus of the hypothalamus (PVN) and the oval region of the bed nucleus of stria terminalis (ovBNST), two regions associated with cardiac sympathetic control...
January 30, 2018: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/29275437/gene-expression-of-thyrotropin-and-corticotrophin-releasing-hormones-is-regulated-by-environmental-salinity-in-the-euryhaline-teleost-sparus-aurata
#11
Ignacio Ruiz-Jarabo, J A Martos-Sitcha, C Barragán-Méndez, G Martínez-Rodríguez, J M Mancera, F J Arjona
In euryhaline teleosts, the hypothalamus-pituitary-thyroid and hypothalamus-pituitary-interrenal axes (HPT and HPI, respectively) are regulated in response to environmental stimuli such as salinity changes. However, the molecular players participating in this physiological process in the gilthead seabream (Sparus aurata), a species of high value for aquaculture, are still not identified and/or fully characterized in terms of gene expression regulation. In this sense, this study identifies and isolates the thyrotropin-releasing hormone (trh) mRNA sequence from S...
April 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29138567/resveratrol-ameliorates-chronic-unpredictable-mild-stress-induced-depression-like-behavior-involvement-of-the-hpa-axis-inflammatory-markers-bdnf-and-wnt-%C3%AE-catenin-pathway-in-rats
#12
Xin-Hua Yang, Su-Qi Song, Yun Xu
Classic antidepressant drugs are modestly effective across the population and most are associated with intolerable side effects. Recently, numerous lines of evidence suggest that resveratrol (RES), a natural polyphenol, possesses beneficial therapeutic activity for depression. The aim of the present study was to explore whether RES exhibits an antidepressant-like effect in a depression model and to explore the possible mechanism. A depression model was established via chronic unpredictable mild stress (CUMS), after which the model rats in the RES and fluoxetine groups received a daily injection of RES or fluoxetine, respectively...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29082242/colonic-transit-time-and-gut-peptides-in-adult-patients-with-slow-and-normal-colonic-transit-constipation
#13
Giuseppe Riezzo, Guglielmina Chimienti, Caterina Clemente, Benedetta D'Attoma, Antonella Orlando, Caterina Mammone Rinaldi, Francesco Russo
PURPOSE: To investigate whether pathophysiological differences exist among healthy controls (HC) and patients with slow and normal transit constipation (STC and NTC), we evaluated (1) gastrointestinal (GI) symptoms using validated questionnaires; (2) circulating concentrations of neurotensin, motilin, corticotrophin-releasing factor (CRF), and somatostatin; and (3) possible differences in frequency distribution of the neurotensin rs1800832 A/G and Neurotensin Receptor 1 rs6090453 C/G SNPs...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29080675/activation-of-crf-crfr1-signaling-in-the-basolateral-nucleus-of-the-amygdala-contributes-to-chronic-forced-swim-induced-depressive-like-behaviors-in-rats
#14
Lin Chen, Song Li, Jie Cai, Tian-Jiao Wei, Ling-Yu Liu, Hong-Yan Zhao, Bo-Heng Liu, Hong-Bo Jing, Zi-Run Jin, Min Liu, You Wan, Guo-Gang Xing
The basolateral nucleus of the amygdala (BLA) plays a key role in processing stressful events and affective disorders. Previously we have documented that exposure of chronic forced swim (FS) to rats produces a depressive-like behavior and that sensitization of BLA neurons is involved in this process. In the present study, we demonstrated that chronic FS stress (CFSS) could activate corticotrophin-releasing factor (CRF)/CRF receptor type 1 (CRFR1) signaling in the BLA, and blockade of CRF/CRFR1 signaling by intra-BLA injection of NBI27914 (NBI), a selective CRFR1 antagonist, could prevent the CFSS-induced depressive-like behaviors in rats, indicating that activation of CRF/CRFR1 signaling in the BLA is required for CFSS-induced depression...
October 27, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28970041/crassifoside-h-improve-the-depressive-like-behavior-of-rats-under-chronic-unpredictable-mild-stress-possible-involved-mechanisms
#15
Yue Zhang, Jin-Fang Ge, Fei-Fei Wang, Feng Liu, Chao Shi, Ning Li
Crassifoside (CH) is a novel chlorine-containing compound isolated from rhizomes of Curculigo glabrescens. This study aimed to explore the antidepressant-like effect of CH and involved mechanisms. A rat depression model was established using chronic unpredictable mild stress (CUMS) paradigm. Behavioral tests including sucrose preference test (SPT), open field test (OFT) and forced swimming test (FST) were used to evaluate the antidepressant-like effect of CH. The levels of plasma corticosterone (CORT) and corticotrophin-releasing factor (CRF) in hypothalamus were measured to determine the activity of hypothalamic pituitary-adrenal (HPA) axis...
September 29, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28958685/saikosaponin-a-attenuates-perimenopausal-depression-like-symptoms-by-chronic-unpredictable-mild-stress
#16
Xue-Qin Chen, Shu-Jiao Chen, Wen-Na Liang, Miao Wang, Cheng-Fu Li, Shuang-Shuang Wang, Shu-Qi Dong, Li-Tao Yi, Can-Dong Li
Accumulating studies have shown that a traditional Chinese decoction Chaihu-Shugan-San produced the antidepressant-like effects in rodents including in perimenopausal. Previous studies and our preliminary study indicated that saikosaponin A, one of the main constituents of Chaihu-Shugan-San, enhanced brain-derived neurotrophic factor (BDNF) expression in rats. Herein, this study aimed to evaluate the antidepressant-like effects of saikosaponin A in perimenopausal rats exposed to chronic unpredictable mild stress (CUMS)...
September 25, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28935440/effects-of-acute-restraint-and-unpredictable-chronic-mild-stress-on-brain-corticotrophin-releasing-factor-mrna-in-the-elevated-t-maze
#17
José S de Andrade, Isabel C Céspedes, Renata O Abrão, Joelcimar M da Silva, Ricardo Ceneviva, Daniel Araki Ribeiro, Jackson C Bittencourt, Milena B Viana
Corticotrophin releasing factor (CRF) modulates stress/anxiety-related responses. Previous studies showed that exposure to acute restraint and unpredictable chronic mild stress (UCMS) facilitates elevated T-maze (ETM) avoidance responses, an anxiogenic-like effect. This study verified the role of CRF in the modulation of ETM avoidance and escape reactions, in unstressed rats and in animals exposed to acute restraint or to UCMS, by quantifying CRF mRNA concentrations in stress/anxiety-related brain regions, through semiquantitative in situ hybridization...
September 19, 2017: Behavioural Brain Research
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
#18
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/28845039/preoperative-and-postoperative-pituitary-function-in-patients-with-tuberculum-sellae-meningioma-based-on-pituitary-provocation-tests
#19
Shingo Fujio, Hirofumi Hirano, Mami Yamashita, Satoshi Usui, Yasuyuki Kinoshita, Atsushi Tominaga, Tomoko Hanada, Hitoshi Yamahata, Hiroshi Tokimura, Ryosuke Hanaya, Kaoru Kurisu, Kazunori Arita
Given the anatomical proximity of tuberculum sellae meningioma (TSM) to the hypothalamo-pituitary system, pituitary function impairments are of great concern. We retrospectively investigated pituitary function changes following surgery in patients with TSM using pituitary provocation tests (PPTs). Thirty-one patients (27 females and 4 males) with TSM underwent initial transcranial surgery (29 patients) or transsphenoidal surgery (two patients); surgeries were performed carefully to avoid injuring the pituitary stalk...
October 15, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28782547/early-life-stress-increases-testosterone-and-corticosterone-and-alters-stress-physiology-in-zebra-finches
#20
J Bayley Zito, Angy Hanna, Nora Kadoo, Michelle L Tomaszycki
Early life stress has enduring effects on behavior and physiology. However, the effects on hormones and stress physiology remain poorly understood. In the present study, parents of zebra finches of both sexes were exposed to an increased foraging paradigm from 3 to 33days post hatching. Plasma and brains were collected from chicks at 3 developmental time points: post hatching days 25, 60 and adulthood. Plasma was assayed for testosterone (T), estradiol (E2), and corticosterone (CORT). The paraventricular nucleus of the hypothalamus was assessed for corticotrophin releasing factor (CRH) and glucocorticoid receptor (GR) expression...
August 15, 2017: Hormones and Behavior
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