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https://www.readbyqxmd.com/read/29935340/stress-up-regulates-oxidative-burst-in-juvenile-chinook-salmon-leukocytes
#1
Crystal L Herron, K M Cogliati, B P Dolan, A Munakata, C B Schreck
When fish perceive stressful scenarios, their hypothalamus-pituitary-interrenal axis is activated resulting in the release of corticotropin releasing hormone, adrenocorticotropic hormone (ACTH), and finally cortisol. The physiologic stress response of fish has most often been linked to the reduced performance of the immune system, with a few exceptions where the immune system is activated. In this report, we tested the hypothesis that oxidative burst activity levels in juvenile Chinook salmon (Oncorhynchus tshawytscha) are altered when the fish is presented with a stressor...
June 20, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29934353/cerebellar-learning-properties-are-modulated-by-the-crf-receptor-in-granular-cells
#2
Gili Ezra-Nevo, Francesca Prestori, Francesca Locatelli, Teresa Soda, Michiel M Ten Brinke, Mareen Engel, Henk-Jan Boele, Laura Botta, Dena Leshkowitz, Assaf Ramot, Michael Tsoory, Inbal E Biton, Jan Deussing, Egidio D'Angelo, Chris I De Zeeuw, Alon Chen
Corticotropin-releasing factor (CRF) and its type 1 receptor (CRFR1 ) play an important role in the responses to stressful challenges. Despite the well-established expression of CRFR1 in granular cells (GrCs), its role in procedural motor performance and memory formation remains elusive. To investigate the role of CRFR1 expression in cerebellar GrCs, we used a mouse model depleted of CRFR1 in these cells. We detected changes in the cellular learning mechanisms in GrCs depleted of CRFR1 in that they showed changes in intrinsic excitability and long-term synaptic plasticity...
June 22, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29932809/dominance-relationships-in-syrian-hamsters-modulate-neuroendocrine-and-behavioral-responses-to-social-stress
#3
Brooke N Dulka, Richa Koul-Tiwari, J Alex Grizzell, Marquinta L Harvey, Subimal Datta, Matthew A Cooper
Stress is a well-known risk factor for psychopathology and rodent models of social defeat have strong face, etiological, construct and predictive validity for these conditions. Syrian hamsters are highly aggressive and territorial, but after an acute social defeat experience they become submissive and no longer defend their home territory, even from a smaller, non-aggressive intruder. This defeat-induced change in social behavior is called conditioned defeat (CD). We have shown that dominant hamsters show increased neural activity in the ventromedial prefrontal cortex (vmPFC) following social defeat stress and exhibit a reduced CD response at social interaction testing compared to subordinates...
June 22, 2018: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29916119/endometrial-crh-and-implantation-from-bench-to-bedside
#4
REVIEW
Antonis Makrigiannakis, Thomas Vrekoussis, Emmanouel Zoumakis, Vassilia Hatzidakis, Eugenia Vlachou, Nicolaos Salakos, Sophia N Kalantaridou
Endometrial corticotropin-releasing hormone (CRH) has been described as a mediator of decidualisation and as a contributor of maternal-fetal immunotolerance. Deregulation of the CRH expression pattern has been associated with unfavourable reproductive outcomes as well as chronic endometrium-derived inflammatory disorders, such as endometriosis and adenomyosis. The current review summarises the evidence produced regarding the role of CRH in endometrial physiology and pathophysiology and highlights recent clinical data regarding the role of CRH in improving clinical pregnancy rates in women with repeated implantation failures following in vitro fertilisation and embryo transfer...
June 18, 2018: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29911619/the-effect-of-tail-docking-in-neonatal-pigs-on-the-central-expression-of-genes-involved-in-modulating-anxiety-like-behaviour
#5
P Oberst, D A Sandercock, P Di Giminiani, S A Edwards, P J Brunton
Background Adverse experiences in early life, such as exposure to stress, can have long term detrimental effects on the future physiology and behaviour of the animal. Typically animals exposed to such experiences are more anxious and more reactive to stress in later life. Tail biting is a major problem in modern pig production, both in terms of animal welfare and productivity. Tail docking in early postnatal life is common practice to reduce risk of this problem, but causes pain and may alter pain sensitivity...
December 29, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29911261/the-interplay-between-oxytocin-and-the-crf-system-regulation-of-the-stress-response
#6
Julia Winter, Ben Jurek
Oxytocin (OT) has drawn the attention of researchers since 1930. Since then, many aspects of oxytocin have been uncovered, such as reproductive functions, dampening anxiety, enhancing socioemotional behavior, or regulating genomic effects on a cellular level. Here, we want to focus on the interaction between the OT system and the stress/corticotropin-releasing factor (CRF)-system of the brain. Depending on the nature of the stressor, OT is released simultaneously or directly after the stress from the neurohypophysis into the periphery and/or via somato-dendritic release in stress-sensitive brain areas...
June 18, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29907890/impact-of-mast-cells-in-depression-disorder-inhibitory-effect-of-il-37-new-frontiers
#7
REVIEW
Pio Conti, Alessandro Caraffa, Gianpaolo Ronconi, Chiara M Conti, Spiros K Kritas, Filiberto Mastrangelo, Lucia Tettamanti, Theoharis C Theoharides
The purpose of this article is to study the involvement of inflammatory mast cells (MCs) in depression which may be inhibited by IL-37. We evaluate mast cells in depression on the basis of our previous experimental data, and using the most relevant studies reported in the literature. Dysfunction of mood, feelings, and thoughts is a major risk factor for several metabolic diseases and may influence the physiology of the body leading to depression. Depression, present in mastocytosis, is an important endogenous process that promotes the activation of meningeal cell receptors through a low-grade neurogenic chronic inflammation, and MCs...
June 16, 2018: Immunologic Research
https://www.readbyqxmd.com/read/29906693/proteomic-response-of-gill-microsomes-of-crassostrea-brasiliana-exposed-to-diesel-fuel-water-accommodated-fraction
#8
Gabrielle do Amaral E Silva Müller, Karim Hahn Lüchmann, Guilherme Razzera, Guilherme Toledo-Silva, Maria João Bebianno, Maria Risoleta Freire Marques, Afonso Celso Dias Bainy
Diesel fuel water-accommodated fraction (diesel-WAF) is a complex mixture of organic compounds that may cause harmful effects to marine invertebrates. Expression of microsomal proteins can be changed by oil exposure, causing functional alterations in endoplasmic reticulum (ER). The aim of this study was to investigate changes in protein expression signatures in microsomes of oysterl Crassostrea brasiliana (=C.gasar) gill after exposure to 10% diesel-WAF for 24 and 72 h. Protein expression signatures of gills of oysters exposed to diesel-WAF were compared to those of unexposed oysters using two-dimensional electrophoresis (2-DE) to identify differentially expressed proteins...
June 6, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29904149/stress-peptides-sensitize-fear-circuitry-to-promote-passive-coping
#9
Pinelopi Pliota, Vincent Böhm, Florian Grössl, Johannes Griessner, Ornella Valenti, Klaus Kraitsy, Joanna Kaczanowska, Manuel Pasieka, Thomas Lendl, Jan M Deussing, Wulf Haubensak
Survival relies on optimizing behavioral responses through experience. Animals often react to acute stress by switching to passive behavioral responses when coping with environmental challenge. Despite recent advances in dissecting mammalian circuitry for Pavlovian fear, the neuronal basis underlying this form of non-Pavlovian anxiety-related behavioral plasticity remains poorly understood. Here, we report that aversive experience recruits the posterior paraventricular thalamus (PVT) and corticotropin-releasing hormone (CRH) and sensitizes a Pavlovian fear circuit to promote passive responding...
June 14, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29902479/single-oral-administration-of-flavan-3-ols-induces-stress-responses-monitored-with-stress-hormone-elevations-in-the-plasma-and-paraventricular-nucleus
#10
Yasuyuki Fujii, Kenta Suzuki, Yahiro Hasegawa, Fumio Nanba, Toshiya Toda, Takahiro Adachi, Shu Taira, Naomi Osakabe
We previously confirmed that postprandial alterations in the circulation and metabolism after a single oral dose of flavan 3-ols (mixture of catechin and catechin oligomers) were involved in an increase in sympathetic nervous activity. However, it is well known that, in response to various stresses, activation of the hypothalamic-pituitary-adrenal (HPA) axis occurs together with sympathetic nerve activity, which is associated with activation of the sympathetic-adrenal-medullary (SAM) axis. In this study, we examined whether the HPA axis was activated after a single dose of flavan 3-ols...
June 11, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29901836/chronic-stress-dampens-excitatory-synaptic-gain-in-the-paraventricular-nucleus-of-the-hypothalamus
#11
Eric Salter, Julia Sunstrum, Sara Matovic, Wataru Inoue
KEY POINTS: Glutamatergic synaptic inputs to corticotropin releasing hormone (CRH) secreting neurons in the paraventricular nucleus of the hypothalamus (PVN) are required for stress-induced activation of the hypothalamic-pituitary-adrenal (HPA) axis. These synapses also undergo stress-induced plasticity thereby influencing HPA axis stress adaptation. By using patch clamp electrophysiology, we show that, in adult non-stressed mice, action potentials at these glutamatergic afferents elicit multiquantal transmission to the postsynaptic PVN-CRH neurons (i...
June 14, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29899664/neuropeptide-signaling-networks-and-brain-circuit-plasticity
#12
Cynthia K McClard, Benjamin R Arenkiel
The brain is a remarkable network of circuits dedicated to sensory integration, perception, and response. The computational power of the brain is estimated to dwarf that of most modern supercomputers, but perhaps its most fascinating capability is to structurally refine itself in response to experience. In the language of computers, the brain is loaded with programs that encode when and how to alter its own hardware. This programmed "plasticity" is a critical mechanism by which the brain shapes behavior to adapt to changing environments...
2018: Journal of Experimental Neuroscience
https://www.readbyqxmd.com/read/29888302/sex-differences-after-chronic-stress-in-the-expression-of-opioid-stress-and-neuroplasticity-related-genes-in-the-rat-hippocampus
#13
Matthew Randesi, Yan Zhou, Sanoara Mazid, Shannon C Odell, Jason D Gray, J Correa da Rosa, Bruce S McEwen, Teresa A Milner, Mary Jeanne Kreek
Opioid peptides and their receptors re-organize within hippocampal neurons of female, but not male, rats following chronic immobilization stress (CIS) in a manner that promotes drug-related learning. This study was conducted to determine if there are also sex differences in gene expression in the hippocampus following CIS. Adult female and male rats were subjected to CIS (30 min/day) for 10 days. Twenty-four hours after the last stressor, the rats were euthanized, the brains were harvested and the medial (dentate gyrus/CA1) and lateral (CA2/CA3) dorsal hippocampus were isolated...
February 2018: Neurobiology of Stress
https://www.readbyqxmd.com/read/29880854/ablation-of-somatostatin-cells-leads-to-impaired-pancreatic-islet-function-and-neonatal-death-in-rodents
#14
Na Li, Zhao Yang, Qing Li, Zhen Yu, Xu Chen, Jia-Cheng Li, Bo Li, Shang-Lei Ning, Min Cui, Jin-Peng Sun, Xiao Yu
The somatostatin (SST)-secreting cells were mainly distributed in the pancreatic islets, brain, stomach and intestine in mammals and have many physiological functions. In particular, the SST-secreting δ cell is the third most common cell type in the islets of Langerhans. Recent studies have suggested that dysregulation of paracrine interaction between the pancreatic δ cells and β cells results in impaired glucose homeostasis and contributes to diabetes development. However, direct evidence of the functional importance of SST cells in glucose homeostasis control is still lacking...
June 7, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29878268/the-protein-status-of-rats-affects-the-rewarding-value-of-meals-due-to-their-protein-content
#15
Catherine Chaumontet, Isidra Recio, Gilles Fromentin, Simon Benoit, Julien Piedcoq, Nicolas Darcel, Daniel Tomé
Background: Protein status is controlled by the brain, which modulates feeding behavior to prevent protein deficiency. Objective: This study tested in rats whether protein status modulates feeding behavior through brain reward pathways. Methods: Experiments were conducted in male Wistar rats (mean ± SD weight; 230 ± 16 g). In experiment 1, rats adapted for 2 wk to a low-protein (LP; 6% of energy) or a normal-protein (NP; 14% of energy) diet were offered a choice between 3 cups containing high-protein (HP; 50% of energy), NP, or LP feed; their intake was measured for 24 h...
June 1, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29869543/no-association-between-antidepressant-efficacy-and-rs28365143-in-corticotropin-releasing-hormone-binding-protein-in-a-large-meta-analysis
#16
Chiara Fabbri, Cathryn M Lewis, Roy H Perlis, Rudolf Uher
No abstract text is available yet for this article.
June 1, 2018: American Journal of Psychiatry
https://www.readbyqxmd.com/read/29867541/prediction-of-molecular-mechanisms-for-lianxia-ningxin-formula-a-network-pharmacology-study
#17
Yang Yang, Kuo Yang, Teng Hao, Guodong Zhu, Ruby Ling, Xuezhong Zhou, Ping Li
Objectives: Network pharmacological methods were used to investigate the underlying molecular mechanisms of LianXia NingXin (LXNX) formula, a Chinese prescription, to treat coronary heart disease (CHD) and disease phenotypes (CHD related diseases and symptoms). Methods: The different seed gene lists associated with the herbs of LXNX formula, the CHD co-morbid diseases and symptoms which were relieved by the LXNX formula (co-morbid diseases and symptoms) were curated manually from biomedical databases and published biomedical literatures...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29864416/possible-involvement-of-thyrotropin-releasing-hormone-receptor-3-in-the-release-of-prolactin-in-the-metamorphosing-bullfrog-larvae
#18
Masaki Nakano, Itaru Hasunuma, Atsuko Minagawa, Shawichi Iwamuro, Kazutoshi Yamamoto, Sakae Kikuyama, Takeo Machida, Tetsuya Kobayashi
In amphibians, thyrotropin (TSH), corticotropin (ACTH) and prolactin (PRL) are regarded as the major pituitary hormones involved in metamorphosis and known to be controlled by corticotropin-releasing factor (CRF), arginine vasotocin (AVT), and thyrotropin-releasing hormone (TRH), respectively. It is also known that thyrotropes and corticotropes are equipped with CRF type-2 receptor and AVT V1b receptor, respectively. As for PRL cells, information about the type of receptor for TRH (TRHR) through which the action of TRH is mediated to induce the release of PRL is lacking...
June 1, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29858858/sex-differences-in-stress-responses-a-critical-role-for-corticotropin-releasing-factor
#19
REVIEW
Debra A Bangasser, Kimberly R Wiersielis
Rates of post-traumatic stress disorder, panic disorder, and major depression are higher in women than in men. Another shared feature of these disorders is that dysregulation of the stress neuropeptide, corticotropin-releasing factor (CRF), is thought to contribute to their pathophysiology. Therefore, sex differences in responses to CRF could contribute to this sex bias in disease prevalence. Here, we review emerging data from non-human animal models that reveal extensive sex differences in CRF functions ranging from its presynaptic regulation to its postsynaptic efficacy...
March 2018: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29807116/perfluorooctane-sulfonate-pfos-can-alter-the-hypothalamic-pituitary-adrenal-hpa-axis-activity-by-modifying-crf1-and-glucocorticoid-receptors
#20
R Salgado-Freiría, S López-Doval, A Lafuente
Perfluorooctane sulfonate (PFOS) is an endocrine disruptor highly persistent, bioaccumulative and neurotoxic, whose presence has been detected in different compartments of the environment. The aim of this study was to investigate whether PFOS could alter the HPA axis activity by modifying the gene and protein expression of corticotropin-releasing factor 1 receptor (CRF1r) and glucocorticoid receptor (Gr). For that purpose, Sprague-Dawley adult male rats were orally treated by gavage with 0.5; 1.0; 3.0 and 6...
May 25, 2018: Toxicology Letters
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