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https://www.readbyqxmd.com/read/28629735/chronic-fluoxetine-treatment-enhances-sympathetic-activities-associated-with-abnormality-of-baroreflex-function-in-conscious-normal-rats
#1
Ling-Zong Hong, Keh-Feng Huang, Siu-Wan Hung, Li-Te Kuo
Data regarding the effects of selective serotonin reuptake inhibitors (SSRIs), which are a common type of antidepressants, on cardiovascular autonomic function are inconsistent. The present study was conducted to determine the effects of chronic fluoxetine, an SSRI, on blood pressure, cardiac autonomic nervous activities and baroreflex control of heart rate. Male Sprague-Dawley rats were treated with fluoxetine (10mg/kg·day, p.o.) or saline for 14 weeks. Baroreflex function was determined by the sigmoid logistic method based on the heart rate responses to changes in blood pressure elicited by phenylephrine or sodium nitroprusside infusions...
June 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28629384/involvement-of-the-glutamate-glutamine-cycle-and-glutamate-transporter-glt-1-in-antidepressant-like-effects-of-xiao-yao-san-on-chronically-stressed-mice
#2
Xiu-Fang Ding, Yue-Hua Li, Jia-Xu Chen, Long-Ji Sun, Hai-Yan Jiao, Xin-Xin Wang, Yan Zhou
BACKGROUND: Xiao Yao San (XYS) is an herbal prescription which is used in the treatment of depression for thousands of years from Song dynasty in China (960-1127 A.D.), and is the bestselling and most popular herb formula for treating major depression. This study aimed to assess the chronic antidepressant effects of XYS and fluoxetine in depressed mice induced by chronic unpredictable mild stress (CUMS) and its association with  alterations in glutamate/glutamine cycle and glutamate transporters...
June 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28624596/repeated-co-treatment-with-antidepressants-and-risperidone-increases-bdnf-mrna-and-protein-levels-in-rats
#3
Zofia Rogóż, Katarzyna Kamińska, Patrycja Pańczyszyn-Trzewik, Magdalena Sowa-Kućma
BACKGROUND: Recently, several clinical studies have suggested a beneficial effect of a combination of antidepressants (ADs) with antipsychotic drugs in drug-resistant depression. Moreover, preclinical and clinical studies indicated a role of brain-derived neurotrophic factor (BDNF) in the pathology of depression, as well as in the mechanism of action of ADs. METHODS: In the present study, we investigated the effect of repeated administration of ADs, escitalopram, fluoxetine or mirtazapine and a low dose of risperidone (an atypical antipsychotic drug) given separately or in combination, on the mRNA and protein levels of BDNF or cAMP response element binding (p-CREB) in the hippocampus and frontal cortex of male Wistar rats...
March 4, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28617576/ex-vivo-measurement-of-electrically-evoked-dopamine-release-in-zebrafish-whole-brain
#4
Mimi Shin, Thomas M Field, Chase S Stucky, Mia N Furgurson, Michael A Johnson
Zebrafish (Danio rerio) have recently emerged as useful model organism for the study of neuronal function. Here, fast-scan cyclic voltammetry at carbon-fiber microelectrodes (FSCV) was used to measure locally-evoked dopamine release and uptake in zebrafish whole brain preparations and results were compared with those obtained from brain slices. Evoked dopamine release ([DA]max) was similar in whole brain and sagittal brain slice preparations (0.49 ± 0.13 µM in whole brain and 0.59 ± 0.28 µM in brain slices)...
June 15, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28615694/selective-serotonin-reuptake-inhibitor-fluoxetine-impairs-e-cadherin-mediated-cell-adhesion-and-alters-calcium-homeostasis-in-pancreatic-beta-cells
#5
Huang-Yu Chang, Shu-Ling Chen, Meng-Ru Shen, Mei-Lang Kung, Lee-Ming Chuang, Yun-Wen Chen
Selective serotonin reuptake inhibitors (SSRIs) are the most commonly prescribed drugs for mood disorders. Long term use of SSRIs is associated with an increased risk of diabetes, but the underlying mechanism(s) remains elusive. E-cadherin-mediated cell-cell adhesion and elevated [Ca(2+)]i are important for insulin release and pancreatic β cell functions. This study aims to investigate whether a SSRI, fluoxetine (Prozac), induces pancreatic β cell dysfunction through affecting E-cadherin and/or [Ca(2+)]i...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28609327/fluoxetine-induces-paradoxical-effects-in-c57bl6-j-mice-comparison-with-balb-c-mice
#6
Thomas Gosselin, Anne-Marie Le Guisquet, Bruno Brizard, Caroline Hommet, Frédéric Minier, Catherine Belzung
The C57BL6/J mouse is the most commonly used strain in genetic investigations and behavioural tests. However, only a few studies have used C57BL6/J mice to assess the effects of antidepressant compounds. We carried out a study to compare the behavioural effects of fluoxetine (FLX) in a model of depression in two mice strains: C57BL6/J and BALB/c. We used an 8-week unpredictable chronic mild stress (UCMS) protocol during which FLX was administered (15 mg/kg, oral) from the third week to the end of the protocol...
June 12, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28606295/-diagnosing-and-treating-post-traumatic-stress-disorder
#7
Cæcilie Böck Buhmann, Henrik Steen Andersen
The post-traumatic stress disorder (PTSD) diagnosis has undergone large developments. With the changes in DSM-5 and the proposed changes in ICD-11, the two systems move in different directions. Treatment for PTSD is developing, but the evidence for the effect is lacking behind. Trauma-focused cognitive behavioural therapy and eye movement desensitization and reprocessing remain first choice. Pharmacotherapy is secondary. There is evidence for the effect of paroxetine, venlafaxine and fluoxetine and less so for sertraline...
June 12, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28599245/anti-inflammatory-and-ameliorative-effects-of-gallic-acid-on-fluoxetine-induced-oxidative-stress-and-liver-damage-in-rats
#8
Omid Karimi-Khouzani, Esfandiar Heidarian, Sayed Asadollah Amini
BACKGROUND: Fluoxetine-induced liver damage is a cause of chronic liver disease. In the present study the hepatoprotective effects of gallic acid against fluoxetine-induced liver damage were examined. METHODS: Forty-eight male rats were divided into six groups as follow: group 1, the control group; group 2, rats receiving fluoxetine (24mg/kg bw daily, po) without treatment; group 3, rats receiving 24mg/kg bw fluoxetine, treated with 50mg/kg bw silymarin and groups 4, 5, and 6 in which gallic acid (50, 100, and 200mg/kg bw, po, respectively) was prescribed after the consumption of fluoxetine...
March 23, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28598112/-effects-of-fluoxetine-on-nogo-expression-and-collagen-production-with-decrease-of-pulmonary-artery
#9
Xun Ran, Jian-Xun Zhao, Hu Nie, Yu-Cheng Chen
OBJECTIVES: To investigate the effect of fluoxetine on neurite growth inhibitor (Nogo) expession and collagen production of cardiac tissue in rats with right heart failure and pulmonary hypertension. METHODS: Thirty one male SD rats were randomly divided into the treatment group,right heart failure group and normal control group.The rats in the treatment group and right heart failure group received intrapertioneal injection of monocrotaline (MCT,60 mg/kg) to induce pulmonary hypertension and right heart failure...
November 2016: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28588509/behavioral-effects-of-a-novel-benzofuranyl-piperazine-serotonin-2c-receptor-agonist-suggest-a-potential-therapeutic-application-in-the-treatment-of-obsessive-compulsive-disorder
#10
Michelle M Rodriguez, Carl Overshiner, J David Leander, Xia Li, Denise Morrow, Richard G Conway, David L Nelson, Karin Briner, Jeffrey M Witkin
Selective serotonin reuptake inhibitors (SSRIs) are the only effective pharmacological treatments for obsessive-compulsive disorder (OCD). Nonetheless, their generally limited efficacy, side-effects, and delayed onset of action require improved medications for this highly prevalent disorder. Preclinical and clinical findings have suggested serotonin2C (5-HT2C) receptors as a potential drug target. Data in rats and mice are presented here on the effects of a novel 5-HT2C receptor agonist ((3S)-3-Methyl-1-[4-(trifluoromethyl)-7-benzofuranyl]-piperazine) (CPD 1) with high potency and full efficacy at 5-HT2C receptors and less potency and partial agonism at 5-HT2A and 5-HT2B receptors...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28587819/prodepressant-and-anxiogenic-like-effects-of-serotonin-selective-but-not-noradrenaline-selective-antidepressant-agents-in-mice-lacking-%C3%AE-2-containing-gabaa-receptors
#11
Rebecca S Benham, Nishani B Hewage, Raymond F Suckow, Elif Engin, Uwe Rudolph
Deficits in neuronal inhibition via gamma-aminobutyric acid (GABA) type A receptors (GABAA-Rs) are implicated in the pathophysiology of major depressive disorder and the therapeutic effects of current antidepressant treatments, however, the relevant GABAA-R subtype as defined by its alpha subunit is still unknown. We previously reported anxiety- and depressive-like behavior in alpha2+/- and alpha2-/- mice, respectively (Vollenweider, 2011). We sought to determine whether this phenotype could be reversed by chronic antidepressant treatment...
June 3, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28580124/sex-dependent-effects-of-maternal-corticosterone-and-ssri-treatment-on-hippocampal-neurogenesis-across-development
#12
Aarthi R Gobinath, Joanna L Workman, Carmen Chow, Stephanie E Lieblich, Liisa A M Galea
BACKGROUND: Postpartum depression affects approximately 15% of mothers and represents a form of early life adversity for developing offspring. Postpartum depression can be treated with prescription antidepressants like fluoxetine (FLX). However, FLX can remain active in breast milk, raising concerns about the consequences of neonatal FLX exposure. The hippocampus is highly sensitive to developmental stress, and males and females respond differently to stress at many endpoints, including hippocampal plasticity...
2017: Biology of Sex Differences
https://www.readbyqxmd.com/read/28579486/no-effect-of-c1473g-polymorphism-in-the-tryptophan-hydroxylase-2-gene-on-the-response-of-the-brain-serotonin-system-to-chronic-fluoxetine-treatment-in-mice
#13
Ekaterina Y Bazhenova, Nadezhda A Sinyakova, Elizabeth A Kulikova, Irina A Kazarinova, Daria V Bazovkina, Raul R Gainetdinov, Alexander V Kulikov
Selective serotonin reuptake inhibitors (SSRIs) are antidepressants that block serotonin transporter (SERT) and increase serotonin (5-HT) level in the synaptic cleft. The interaction between SERT and the key enzyme of 5-HT synthesis in the brain, tryptophan hydroxylase 2 (TPH2), is essential to maintain the brain 5-HT level. The G allele of C1473G polymorphism in Tph2 gene decreases enzyme activity by half in mouse brain. Here we studied effect of C1473G polymorphism on the reaction of brain 5-HT system to chronic fluoxetine treatment (120mg/l in drinking water, for 3 weeks) in adult males of the congenic B6-1473C and B6-1473G mouse lines with high and low enzyme activity, respectively...
June 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28577106/effect-of-stimulation-of-neurotransmitter-systems-on-heart-rate-variability-and-%C3%AE-adrenergic-responsiveness-of-erythrocytes-in-outbred-rats
#14
E V Kur'yanova, A V Tryasuchev, V O Stupin, D L Teplyi
We studied heart rate variability and β-adrenergic responsiveness of erythrocytes and changes in these parameters in response to single administration of β-adrenoblocker propranolol (2 mg/kg) in outbred male rats against the background of activation of the noradrenergic, serotonergic, and dopaminergic neurotransmitter systems achieved by 4-fold injections maprotiline (10 mg/kg), 5-hydroxytryptophan (50 mg/kg) combined with fluoxetine (3 mg/kg), and L-DOPA (20 mg/kg) with amantadine (20 mg/kg), respectively...
May 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28575844/beneficial-effect-of-fluoxetine-treatment-aganist-psychological-stress-is-mediated-by-increasing-bdnf-expression-in-selected-brain-areas
#15
Gongying Li, Ping Jing, Zhidong Liu, Zhiruo Li, Hongxia Ma, Wenzhen Tu, Wei Zhang, Chuanjun Zhuo
SSRI antidepressant fluoxetine is widely used to treat psychological stress related disorders, however the underlying working mechanisms is not fully understood, as SSRIs can rapidly increase the extracellular serotonin levels but it normally takes weeks to reveal their therapeutic effect in the stress-related psychological disorders. Our previous study demonstrated that purely psychological stress without any physic stimuli induces a biphasic change in the expression of brain-derived neurotrophic factor (BDNF), which immediately decrease and then gradually increase after the stress; and that the latter BDNF increase in response to the psychological stress involves the activation of serotonin system...
May 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28573220/jieyuanshen-decoction-exerts-antidepressant-effects-on-depressive-rat-model-via-regulating-hpa-axis-and-the-level-of-amino-acids-neurotransmitter
#16
Zhang Qiuxia, Ma Xinlong, Yang Yilong, Zhao Hui, Wang Yali, Yao Xiaoquan, Wang Lei, Chang Jiahui, Zou Haiyan
BACKGROUND: Jieyuanshen decoction (JYAS-D) - a traditional Chinese medicine was invented by Professor Nie based on classic formulas, chaihu jia longgu muli decoction has been proved as having favorable curative effects on depression in clinical practices. The aim of this study was to investigate the antidepressant effects and its molecular mechanism of JYAS-D. MATERIALS AND METHODS: The model of depression was established by Chronic Unpredictable Stress. Different doses (8...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28566959/metabolic-effects-of-antidepressant-treatment
#17
Özlem Olguner Eker, Saliha Özsoy, Baki Eker, Hatice Doğan
INTRODUCTION: This study aimed to investigate body measurements, glucose-insulin metabolism, and lipid profile in patients with anxiety and depressive symptoms and also the effects of antidepressant drugs on these metabolic parameters. METHODS: The study included 40 outpatients and 32 healthy controls. The patients received antidepressant treatment (sertraline, escitalopram, fluoxetine, and venlafaxine) for 8 weeks. Body measurements were performed, and lipid, fasting blood glucose, and insulin levels were measured before and after treatment in patients and once in healthy controls...
March 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28557786/absorption-of-transdermal-fluoxetine-compounded-in-a-lipoderm-base-compared-to-oral-fluoxetine-in-client-owned-cats
#18
Lauren R Eichstadt, Lorraine A Corriveau, George E Moore, Gregory T Knipp, Bruce R Cooper, Wilson E Gwin
The objective of this study was to compare serum concentrations of transdermal fluoxetine compounded in Lipoderm base versus commercially available oral fluoxetine tablets. Sixteen clinically healthy, client-owned cats that were at least one year of age were enrolled. Cats weighed between three and seven kilograms, had no comorbidities, and were behavior medication naïve. Cats were recruited from January 2016 through April 2016. Eight cats were assigned to each medication group based on owner preference. The cats received either oral (1 mg/kg) or transdermal (5 mg/kg; maximum 25 mg daily) fluoxetine compounded in a transdermal base (PCCA Lipoderm), administered daily for 60 days...
May 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28553715/novel-approach-for-characterizing-ph-dependent-uptake-of-ionizable-chemicals-in-aquatic-organisms
#19
Maja V Karlsson, Laura J Carter, Annika Agatz, Alistair B A Boxall
Here, we present and evaluate a combined experimental and modeling approach for characterizing the uptake of ionizable chemicals from water and sediments into aquatic organisms under different pH conditions. We illustrate and evaluate the approach for two pharmaceuticals (diclofenac and fluoxetine) and one personal care product ingredient (triclosan) for the oligochaete Lumbriculus variegatus. Initially, experimental data on the uptake of the three chemicals at two pH values were fitted using a toxicokinetic model to derive uptake and depuration constants for the neutral and ionized species of each molecule...
June 8, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28552630/protective-effects-of-melatonin-on-long-term-administration-of-fluoxetine-in-rats
#20
Majid Khaksar, Ahmad Oryan, Mansour Sayyari, Aysa Rezabakhsh, Reza Rahbarghazi
The degree and consequence of tissue injury are highly regarded during long-term exposure to selective antidepressant fluoxetine. Melatonin has been shown to palliate different lesions by scavenging free radicals, but its role in the reduction of the fluoxetine-induced injuries has been little known. Thirty-six mature male Wistar rats were randomly assigned into control and experimental groups. The experimental rats were included as following; 24mg/kg/bw fluoxetine for 4 weeks; 1mg/kg/bw melatonin for 4 weeks; fluoxetine+1-week melatonin, fluoxetine+2-week melatonin and fluoxetine+4-week melatonin...
May 25, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
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