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https://www.readbyqxmd.com/read/29331576/normative-distribution-of-substance-p-and-its-tachykinin-neurokinin-1-receptor-in-the-medullary-serotonergic-network-of-the-human-infant-during-postnatal-development
#1
Fiona M Bright, Roger W Byard, Robert Vink, David S Paterson
Substance P (SP) and its tachykinin NK1 receptor (NK1R) function within key medullary nuclei to regulate cardiorespiratory and autonomic control. We examined the normative distribution of SP and NK1R in the serotonergic (5-Hydroxytryptamine, [5-HT]) network of the human infant medulla during postnatal development, to provide a baseline to facilitate future analysis of the SP/NK1R system and its interaction with 5-HT within pediatric brainstem disorders in early life. [125I] labelled Bolton Hunter SP (BH-SP) tissue receptor autoradiography (n = 15), single label immunohistochemistry (IHC) and double label immunofluorescence (IF) (n = 10) were used to characterize the normative distribution profile of SP and NK1R in the 5-HT network of the human infant medulla during postnatal development...
January 10, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29326893/treadmill-exercise-ameliorates-social-isolation-induced-depression-through-neuronal-generation-in-rat-pups
#2
Jung-Wan Cho, Sun-Young Jung, Sang-Won Lee, Sam-Jun Lee, Tae-Beom Seo, Young-Pyo Kim, Dae-Young Kim
Social isolation is known to induce emotional and behavioral changes in animals and humans. The effect of treadmill exercise on depression was investigated using social isolated rat pups. The rat pups in the social isolation groups were housed individually. The rat pups in the exercise groups were forced to run on treadmill for 30 min once a day from postnatal day 21 to postnatal day 34. In order to evaluate depression state of rat pups, forced swimming test was performed. Newly generated cells in the hippocampal dentate gyrus were determined by 5-bromo-2'-deoxyuridine (BrdU) immunohistochemistry...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29326489/ondansetron-ameliorates-depression-associated-with-obesity-in-high-fat-diet-fed-experimental-mice-an-investigation-based-on-the-behavioral-biochemical-and-molecular-approach
#3
Yeshwant Kurhe, Radhakrishnan Mahesh
INTRODUCTION: Obesity is an important risk factor for depression as more than half of the obese population is susceptible for depression at double rate. Our earlier studies reported the antidepressant potential of 5-HT3 receptor antagonist, ondansetron (OND) in depression associated obesity using behavioral tasks. The present research work is aimed to evaluate the effect of OND on depression associated with obesity with special emphasis on biochemical and molecular mechanisms such as hippocampal brain-derived neurotrophic factor (BDNF), cyclic adenosine monophosphate (cAMP), 5-hydroxytryptamine (5-HT), hippocampal histological examination and immunohistochemical expression of p53 proteins...
July 2017: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/29326032/the-anxiolytic-effect-of-juniperus-virginiana-l-essential-oil-and-determination-of-its-active-constituents
#4
Kai Zhang, Lei Yao
Essential oil from Juniperus virginiana L. (eastern red cedarwood essential oil, CWO) has been used to relax mind and enhance comfort for medical purposes. Few reports showed its effect on anxiety behaviors in animal models. The present study investigated the anxiolytic effect of CWO using two anxiety tests in mice, then determined the major active constituents, examined the change of neurotransmitters after intraperitoneal (i.p.) administration. Analysis using GC/MS revealed that the CWO contained (-)-α-cedrene (28...
January 8, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29325855/gating-of-long-term-potentiation-ltp-in-the-thalamocortical-auditory-system-of-rats-by-serotonergic-5-ht-receptors
#5
Karen K Y Lee, Chloe N Soutar, Hans C Dringenberg
The neuromodulator serotonin (5-hydroxytryptamine, 5-HT) plays an important role in controlling the induction threshold and maintenance of long-term potentiation (LTP) in the visual cortex and hippocampus of rodents. Serotonergic fibers also innervate the rodent primary auditory cortex (A1), but the regulation of A1 plasticity by 5-HT receptors (5-HTRs) is largely uncharted. Thus, we examined the role of several, predominant 5-HT receptor classes (5-HT1ARs, 5-HT2Rs, and 5-HT3Rs) in gating in vivo LTP induction at A1 synapses of adult, urethane-anesthetized rats...
January 8, 2018: Brain Research
https://www.readbyqxmd.com/read/29325311/-effects-of-trimetazidine-a-myocardial-metabolism-agent-on-regulating-5-hydroxytrytamine-system-of-rats-with-myocardial-infarction-and-or-depression
#6
(no author information available yet)
Objective: 5-Hydroxytrytamine (5-HT) system was reported to be associated with myocardial infarction (MI) and depression. The aim of the present study was to study the effect of trimetazidine on 5-HT in MI and/or depression rats. Methods: Ninety rats were divided into three groups: trimetazidine, sertraline and saline groups (n=30 in each group), and pretreated with trimetazidine, sertarline, or saline, respectively, by gavage once a day for 4 weeks. Thereafter, each group was further divided into three subgroups: MI subgroup, depression subgroup, and MI+ depression subgroup...
January 1, 2018: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/29321989/antidepressant-like-effects-of-gan-mai-dazao-tang-via-monoamine-regulatory-pathways-on-forced-swimming-test-in-rats
#7
Hsiang-Ling Huang, Swee-Ling Lim, Kuan-Hung Lu, Lee-Yan Sheen
Depression is a highly prevalent and recurrent mental disorder that impacts all aspects of human life. Undesirable effects of the antidepressant drugs led to the development of complementary and alternative therapies. Gan-Mai-Da-Zao-Tang (, gān mài dà zǎo tang) is a traditional herbal formula commonly used for the treatment of depression, but lack of scientific proof on its mechanism. It consisted of Glycyrrhiza uralensis Fisch. (licorice), Triticum aestivum L. (wheat) and Zizphus jujuba Mill. (jujube)...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29311484/molecular-determinants-of-%C3%AE-3%C3%AE-4-nicotinic-acetylcholine-receptors-inhibition-by-triterpenoids
#8
Sanung Eom, Yoon Suh Kim, Sung Bae Lee, Shinhwa Noh, Hye Duck Yeom, Hyunsu Bae, Jun-Ho Lee
In a previous work, we reported the regulatory role of the triterpenoids on 5-hydroxytryptamine (5-HT)3A receptors activity in Xenopus laevis oocytes (Eur. J. Pharmacol., 615, 2009, Lee et al.). In the present report, we studied the modulation of triterpenoids on the activity of the human nicotinic acetylcholine receptor type α3β4. Two-electrode voltage clamp experiments were used to test acetylcholine mediated inward current (IACh). Treatment with triterpenoids (dehydroeburicoic acid, 6α-hydroxypolyporenic acid C and pachymic acid) inhibited IACh in a concentration dependent and reversible manner...
2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29309585/role-of-5-ht1a-receptor-stimulation-in-the-medial-prefrontal-cortex-in-the-sustained-antidepressant-effects-of-ketamine
#9
Kenichi Fukumoto, Michihiko Iijima, Takeo Funakoshi, Shigeyuki Chaki
Background: We previously reported that serotonergic transmission plays an important role in antidepressant effects of ketamine. However, detailed mechanisms have not been elucidated. Among the serotonin (5-HT) receptor subtypes, the 5-HT1A receptor in the medial prefrontal cortex (mPFC) has an important role in depression. Here, we investigated the role of the mPFC 5-HT1A receptor and its signaling mechanism in the antidepressant effects of ketamine. Methods: The role of 5-HT1A receptor-mediated signaling mechanism (phosphoinositide-3 kinase (PI3K)/Akt) in the mPFC was examined in the mouse forced swimming test and western blotting...
December 22, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29305656/serotonergic-targets-for-the-treatment-of-l-dopa-induced-dyskinesia
#10
REVIEW
Kathryn Lanza, Christopher Bishop
Dopamine (DA) replacement therapy with L-3,4-dihydroxyphenylalanine (L-DOPA) continues to be the gold-standard treatment for Parkinson's disease (PD). Despite clear symptomatic benefit, long-term L-DOPA use often results in the development of L-DOPA-induced dyskinesia (LID), significantly reducing quality of life and increasing costs for PD patients and their caregivers. Accumulated research has demonstrated that several pre- and post-synaptic mechanisms contribute to LID development and expression. In particular, raphe-striatal hyperinnervation and unregulated DA release from 5-HT terminals is postulated to play a central role in LID manifestation...
January 5, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29305167/a-serotonin-receptor-cg5-htr-1-mediating-immune-response-in-oyster-crassostrea-gigas
#11
Yunke Jia, Bin Yang, Wenjing Dong, Zhaoqun Liu, Zhao Lv, Zhihao Jia, Limei Qiu, Lingling Wang, Linsheng Song
Serotonin receptors, including ligand-gated ion channel (LGICs) and G protein-coupled receptors (GPCR), play vital roles in modulating physiological processes and immunoreaction. In the present study, a homologue of serotonin (5-HT) receptor was identified from oyster Crassostrea gigas (designated Cg5-HTR-1). Its open reading frame (ORF) was of 1239 bp, encoding a polypeptide of 412 amino acids with a seven transmembrane region. Cg5-HTR-1 shared high similarity with the 5-HTRs from other animals. The cAMP contents in HEK293T cells decreased significantly after Cg5-HTR-1 transfection and 5-HT incubation (p < ...
January 2, 2018: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29301680/moderate-intensity-exercise-induced-catecholamine-release-in-the-preoptic-area-and-anterior-hypothalamus-in-rats-is-enhanced-in-a-warm-environment
#12
Xinyan Zheng, Satomi Takatsu, Ryo Ishikawa, Hiroshi Hasegawa
Thermoeffector responses and core body temperature (Tcore) homeostasis during exercise are affected by both ambient temperature and exercise intensity. We have previously reported that Tcore, heat loss responses, and catecholamine release in the preoptic area and anterior hypothalamus (PO/AH) increased during incremental treadmill running. However, no previous study has examined whether changes in the thermoregulatory responses at warm ambient temperature are related to catecholamine responses during moderate intensity exercise in rats...
January 2018: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29301550/role-of-the-indoleamine-2-3-dioxygenase-kynurenine-pathway-of-tryptophan-metabolism-in-behavioral-alterations-in-a-hepatic-encephalopathy-rat-model
#13
Xi Jiang, Lexing Xu, Lin Tang, Fuhe Liu, Ziwei Chen, Jiajia Zhang, Lei Chen, Cong Pang, Xuefeng Yu
BACKGROUND: This study aims to explore the role of indoleamine-2,3-dioxygenase (IDO)/kynurenine (KYN) pathway of tryptophan (TRY) metabolism in behavioral alterations observed in hepatic encephalopathy (HE) rats. METHODS: Expression levels of proinflammatory cytokines were tested by QT-PCR and ELISA, levels of IDOs were tested by QT-PCR and Western blot, and levels of 5-hydroxytryptamine (5-HT), KYN, TRY, 3-hydroxykynurenine (3-HK), and kynurenic acid (KA) in different brain regions were estimated using HPLC...
January 4, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29300091/what-contributes-to-snris-dual-targeting-mechanism-the-key-role-of-tm6-domain-in-hsert-and-hnet-revealed-by-molecular-dynamics-simulation
#14
Weiwei Xue, Fengyuan Yang, Panpan Wang, Guoxun Zheng, Yuzong Chen, Xiaojun Yao, Feng Zhu
Dual inhibition of serotonin and norepinephrine transporters (hSERT and hNET) gives greatly improved efficacy and tolerability for treating major depressive disorder (MDD) comparing with selective reuptake inhibitors. Pioneer studies provided valuable information of structure, function, and pharmacology of drugs dual-targeting hSERT and hNET (SNRIs), and the differential binding mechanism between SNRIs and selective inhibitors of 5-HT (SSRIs) / NE (sNRIs) to their corresponding target was expected to be able to facilitate the discovery of privileged drug-like scaffold with improved efficacy...
January 4, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29291430/the-potential-benefit-of-combined-versus-monotherapy-of-coenzyme-q10-and-fluoxetine-on-depressive-like-behaviors-and-intermediates-coupled-to-gsk-3%C3%AE-in-rats
#15
Sally A Abuelezz, Nevien Hendawy, Yosra Magdy
As a part of the serotoninergic dysfunction implicated in neurobiology of depression, evidence has focused on serotonin (5-HT) receptors downstream signaling intermediates including glycogen synthase kinase-3β (GSK-3β), cAMP response element binding protein (CREB) and brain derived neurotrophic factor (BDNF). Our team previously reported that coenzyme Q10 (CoQ10) exerted antidepressant-like effect in rats exposed to chronic unpredictable mid stress (CUMS) via elevating serotonin levels. However, the effect of CoQ10 has not been elucidated in downstream signaling molecules mediating 5HT receptors' effect involved in depressive disorder hitherto...
December 29, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29290056/presynaptic-serotonin-5-ht1b-d-receptor-mediated-inhibition-of-glycinergic-transmission-to-the-frog-spinal-motoneurons
#16
N I Kalinina, Aleksey V Zaitsev, N P Vesselkin
Endogenous monoamine 5-hydroxytryptamine (5-HT, serotonin) is a phylogenetically ancient neurotransmitter present in vertebrates. The functions of 5-HT in central nervous system are intensively studied; however, the presynaptic effects of 5-HT in frog spinal motoneurons are practically unexplored. We have previously shown that 5-HT decreases the frequency of glycinergic miniature inhibitory postsynaptic potentials (mIPSPs), but does not affect the frequency of GABAergic mIPSPs and increases the frequency of glutamatergic postsynaptic potentials...
December 30, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29288534/an-overview-on-vadimezan-dmxaa-the-vascular-disrupting-agent
#17
REVIEW
Amir Daei Farshchi Adli, Rana Jahanban-Esfahlan, Khaled Seidi, Sonia Samandari-Rad, Nosratollah Zarghami
Vascular disrupting agents (VDAs), a group of cancer remedies, can cause a specific and irreversible destruction of established tumor vessels, and the complete halt of blood flow in the tumor. DMXAA(ASA404) or Vadimezan, a flavone-acetic acid-based drug is the most promising VDAs that induces a rapid shutdown of blood flow in tumors but not in normal tissue. The exact mechanism of vascular disruption is unknown; however proposed direct and indirect mechanisms of action for DMXAA comprises: i) inducing apoptosis in endothelial cells; ii) hemorrhagic necrosis and ischemia in tumor; iii) release of serotonin (5-HT); vi) stimulation of innate immune system; v) production of inflammatory cytokines e...
December 30, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29282341/-tourette-syndrome-clinical-features-and-pathophysiology
#18
Yoshiko Nomura
Tourette syndrome (TS) is a neuropsychiatric disorder with the onset in childhood. TS is a form of tic disorders, and characterized by the motor and vocal tics, and comorbidities such as attention deficit hyperkinetic and obsessive compulsive disorders. These symptoms appear age dependently, showing a wax and wane course, and subside or abolish by the late teens. Pathophysiology of TS involves the dysfunction of both motor and non-motor basal ganglia-thalamo-cortical circuitries. The nigrostriatal dopamine (DA) system takes the exponential decrement at the striatum...
December 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/29280949/peripheral-5-ht3-receptors-are-involved-in-the-antinociceptive-effect-of-bunodosine-391
#19
Wilson Alves Ferreira Junior, Andre Junqueira Zaharenko, Kohei Kazuma, Gisele Picolo, Vanessa Pacciari Gutierrez, Jose Carlos de Freitas, Katsuhiro Konno, Yara Cury
Bunodosine 391 (BDS 391), a low molecular weight compound isolated from the sea anemone Bunodosoma cangicum, increases the nociceptive threshold and inhibits inflammatory hyperalgesia. Serotonin receptors are involved in those effects. In this study, we have expanded the characterization of the antinociceptive effect of BDS 391 demonstrating that, in rats: (a) the compound inhibits (1.2-12 ng/paw) overt pain, in the formalin test, and mechanical hyperalgesia (0.6-6.0 ng/paw) detected in a model of neuropathic pain; (b) intraplantar administration of ondansetron, a selective 5-HT3 receptor antagonist, blocks the effect of BDS 391, whereas ketanserin, a 5-HT2 receptor antagonist, partially reversed this effect, indicating the involvement of peripheral 5-HT2 and 5-HT3 receptors in BDS 391 antinociception; and (c) in binding assay studies, BDS 391 was not able to displace the selective 5-HT receptor antagonists, suggesting that this compound does not directly bind to these receptors...
December 27, 2017: Toxins
https://www.readbyqxmd.com/read/29278734/extensive-but-not-limited-repeated-trials-in-passive-avoidance-task-induce-stress-like-symptoms-and-affect-memory-function-in-rats
#20
Saiqa Tabassum, Saida Haider
Stressful and emotionally arousing experiences are remembered, and previous reports show that repeated exposure to stressful condition enhances emotional learning. However, the usefulness of the repeated exposure depends on the intensity and duration. Although repeated training as a strategy to improve memory performance is receiving increased attention from researchers, repeated training may induce stressful effects that have not yet been considered. The present study investigated whether exposure to repetitive learning trials with limited or extensive durations in a passive avoidance task (PAT) would be beneficial or harmful for emotional memory performance in rats...
December 23, 2017: Neuroscience
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