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https://www.readbyqxmd.com/read/29758252/depression-resistant-phenotype-in-mice-overexpressing-regulator-of-g-protein-signaling-8-rgs8
#1
Yuki Kobayashi, Risa Takemoto, Shogo Yamato, Tomoya Okada, Michihiko Iijima, Yoshikatsu Uematsu, Shigeyuki Chaki, Yumiko Saito
Regulator of G protein signaling (RGS) proteins are negative regulators of heterotrimeric G proteins that act by accelerating Gα-mediated GTPase activity to terminate G protein-coupled receptor-associated signaling. RGS8 is expressed in several brain regions involved with movement and mood. To investigate the role of RGS8 in vivo, we generated transgenic mice overexpressing brain RGS8 (RGS8tg). RGS8 gene and protein expressions were examined by real-time PCR and immunohistochemistry, respectively, and a significant increase in RGS8 protein was detected in the hippocampal CA1 region compared with wild-type mice (WT)...
May 11, 2018: Neuroscience
https://www.readbyqxmd.com/read/29738811/hypobaric-hypoxia-exposure-in-rats-differentially-alters-antidepressant-efficacy-of-the-selective-serotonin-reuptake-inhibitors-fluoxetine-paroxetine-escitalopram-and-sertraline
#2
Shami Kanekar, Chandni S Sheth, Hendrik J Ombach, Paul R Olson, Olena V Bogdanova, Matthew Petersen, Chloe E Renshaw, Young-Hoon Sung, Kristen E D'Anci, Perry F Renshaw
Treatment-resistant depression, a chronic condition that affects 30% of depressed patients on antidepressants, is highly linked to suicidal behavior. Chronic hypoxia exposure via living at altitude (hypobaric hypoxia) or with chronic hypoxic diseases is demographically linked to increased risk for depression and suicide. We previously demonstrated that housing rats at altitude for a week incrementally increases depression-like behavior in the forced swim test (FST) in females, but not males. In animal models, high altitude exposure reduces brain serotonin, and selective serotonin reuptake inhibitors (SSRIs) can lose efficacy when brain serotonin levels are low...
May 5, 2018: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29702255/the-role-of-sphingolipid-metabolism-disruption-on-lipopolysaccharide-induced-lung-injury-in-mice
#3
Renata Tiemi Okuro, Mariana Nascimento Machado, Natália Vasconcelos Casquilho, Alcendino Jardim-Neto, Alysson Roncally-Carvalho, Georgia Correa Atella, Walter Araujo Zin
AIM: This study assessed pulmonary outcomes generated by inhibiting key enzymes of sphingolipid metabolism pathways related to ceramide synthesis in a murine model of lung injury induced by lipopolysaccharide (LPS). METHODS: C57BL/6 male adult mice received LPS intratracheally and the expressions of acid sphingomyelinase (ASM), neutral sphingomyelinase (NSM), serine palmitoyl transferase (SPT) and dihydroceramide synthase (DS) were assessed at 2, 4, 6, 12 and 24 h after LPS instillation in lung homogenate (n = 30)...
April 24, 2018: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29688573/antidepressants-for-the-treatment-of-people-with-co-occurring-depression-and-alcohol-dependence
#4
REVIEW
Roberta Agabio, Emanuela Trogu, Pier Paolo Pani
BACKGROUND: Alcohol dependence is a major public health problem characterized by recidivism, and medical and psychosocial complications. The co-occurrence of major depression in people entering treatment for alcohol dependence is common, and represents a risk factor for morbidity and mortality, which negatively influences treatment outcomes. OBJECTIVES: To assess the benefits and risks of antidepressants for the treatment of people with co-occurring depression and alcohol dependence...
April 24, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29626770/estimating-environmental-fate-of-tricyclic-antidepressants-in-wastewater-treatment-plant
#5
Jong-Won Choi, Yufeng Zhao, John Kwame Bediako, Chul-Woong Cho, Yeoung-Sang Yun
TCAs are known to be toxicants and endocrine disrupting agents. Generally, after being used, TCAs are passed through wastewater treatment plants (WWTPs) to be treated. However, still trace amounts (ng/L to μg/L) of TCAs have been founded even in the treated water. Therefore, the aim of this study is to elucidate the environmental behaviors of TCAs in the sewage water from WWTPs (Jeonju, Korea). For the experiments, seven TCAs (amitriptyline, imipramine, clomipramine, desipramine, protriptyline, nortriptyline, and doxepin) were selected...
April 4, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29618006/dysfunction-of-serotoninergic-and-dopaminergic-neuronal-systems-in-the-antidepressant-resistant-impairment-of-social-behaviors-induced-by-social-defeat-stress-exposure-as-juveniles
#6
Sho Hasegawa, Yuriko Miyake, Akira Yoshimi, Akihiro Mouri, Hirotake Hida, Kiyofumi Yamada, Norio Ozaki, Toshitaka Nabeshima, Yukihiro Noda
Background: Extensive studies have been performed on the role of monoaminergic neuronal systems in rodents exposed to social defeat stress as adults. In the present study, we investigated the role of monoaminergic neuronal systems in the impairment of social behaviors induced by social defeat stress exposure as juveniles. Methods: Juvenile, male C57BL/6J mice were exposed to social defeat stress for 10 consecutive days. From 1 day after the last stress exposure, desipramine, sertraline, and aripiprazole, were administered for 15 days...
March 29, 2018: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29602316/effect-of-cytochrome-p450-cyp-2d6-genetic-polymorphism-on-the-inhibitory-action-of-antidepressants-on-cyp2d6-mediated-dopamine-formation-from-p-tyramine
#7
Toshiro Niwa, Mayumi Yanai, Maya Matsumoto, Marina Shizuku
PURPOSE: The inhibitory effects of antidepressants, such as imipramine, desipramine, and fluvoxamine, on dopamine formation from p-tyramine catalyzed by cytochrome P450 (CYP) 2D6.2 (Arg296Cys, Ser486Thr) and CYP2D6.10 (Pro34Ser, Ser486Thr), were compared with those on dopamine formation catalyzed by CYP2D6.1 (wild type), to investigate the effect of a CYP2D6 polymorphism on neuroactive amine metabolism in the brain. METHODS: Inhibition constants (Ki) of the antidepressants toward dopamine formation catalyzed by CYP2D6...
2018: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29496989/impact-of-novel-antidepressants-on-cardiac-metaiodobenzylguanidine-mibg-uptake-experimental-studies-in-sk-n-sh-cells-and-healthy-rabbits
#8
Rudolf A Werner, Ryohei Kobayashi, Mehrbod Som Javadi, Zoe Koeck, Hiroshi Wakabayashi, Stefan Unterecker, Kenichi Nakajima, Constantin Lapa, Andreas Menke, Takahiro Higuchi
Background: 123 I-metaiodobenzylguanidine (mIBG) provides independent prognostic value for risk stratification among heart failure patients, but the use of concomitant medication should not impact its quantitative information. We aimed to evaluate the four most-prescribed antidepressants currently used as a first‑line treatment for patients with major depressive disorder (MDD) and their potential on altering mIBG imaging results. Methods: The inhibition effect of four different types of antidepressants (desipramine, escitalopram, venlafaxine and bupropion) for MDD treatment on 131 I-mIBG uptake was assessed by in-vitro cell uptake assays using human neuroblastoma SK-N-SH cells...
March 1, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29468173/effect-of-desipramine-on-patients-with-breathing-disorders-in-rett-syndrome
#9
Josette Mancini, Jean-Christophe Dubus, Elisabeth Jouve, Jean-Christophe Roux, Patricia Franco, Emmanuelle Lagrue, Pierre Castelnau, Claude Cances, Yves Chaix, Christelle Rougeot-Jung, Catherine Cornu, Vincent Desportes, Louis Vallée, Nadia Bahi-Buisson, Romain Truillet, Laurence Attolini, Laurent Villard, Olivier Blin, Joëlle Micallef
Objective: Rett Syndrome (RTT) is a severe neurodevelopmental condition with breathing disorders, affecting around one in 10,000 female births. Desipramine, a noradrenaline reuptake inhibitor, reduced the number of apneas in Mecp2-deficient mice, a model of RTT. We planned a phase 2 trial to test its efficacy and its safety on breathing patterns in 36 girls with RTT. Methods: The trial was a 6-month, multicenter, randomized, double-blind, placebo-controlled study registered with ClinicalTrials...
February 2018: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29451703/mechanisms-of-imidazoline-i-2-receptor-agonist-induced-antinociception-in-rats-involvement-of-monoaminergic-neurotransmission
#10
Justin N Siemian, Kaixuan Wang, Yanan Zhang, Jun-Xu Li
BACKGROUND AND PURPOSE: Although the antinociceptive efficacies of imidazoline I2 receptor agonists have been established, the exact post-receptor mechanisms remain unknown. This study tested the hypothesis that monoaminergic transmission is critical for I2 receptor agonist-induced antinociception. EXPERIMENTAL APPROACH: von Frey filaments were used to assess antinociceptive effects of two I2 receptor agonists, 2-BFI and CR4056 on chronic constriction injury (CCI)-induced neuropathic pain or complete Freund's adjuvant (CFA)-induced inflammatory pain in rats...
May 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29414147/clobenpropit-a-histamine-h-3-receptor-antagonist-inverse-agonist-inhibits-3-h-dopamine-uptake-by-human-neuroblastoma-sh-sy5y-cells-and-rat-brain-synaptosomes
#11
Elvia Mena-Avila, Ricardo Márquez-Gómez, Guillermo Aquino-Miranda, Gustavo Nieto-Alamilla, José-Antonio Arias-Montaño
BACKGROUND: Clobenpropit, a potent antagonist/inverse agonist at the histamine H3 receptor (H3 R), reduced the cytotoxic action of 6-hydroxydopamine (6-OHDA) in neuroblastoma SH-SY5Y cells transfected with the human H3 R. We therefore set out to study whether this effect involved a receptor-independent action on dopamine transport. METHODS: The uptake of [3 H]-dopamine was assayed in SH-SY5Y cells and rat striatal or cerebro-cortical isolated nerve terminals (synaptosomes)...
February 2018: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29413577/super-paramagnetic-core-shells-anchored-onto-silica-grafted-with-c-8-nh-2-nano-particles-for-ultrasound-assisted-magnetic-solid-phase-extraction-of-imipramine-and-desipramine-from-plasma
#12
Farhad Ahmadi, Tahereh Mahmoudi-Yamchi, Homa Azizian
In current work the Fe3 O4 magnetic nano-particles anchored to core-shells of SiO2 which grafted by C8 /NH2 dual mixed groups, have been synthesized. The magnetic nano-particles were characterized by scanning electron microscopy, X-ray diffraction spectroscopy, and zeta-potential reader. The resulted nano-particles have spherical structure with diameters in the range of 105 to 110 nm. A magnetic solid phase extraction method was developed for extraction of imipramine and desipramine from human plasma samples under ultrasonic conditions by using of prepared NPs as sorbent...
March 1, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29348553/night-eating-model-shows-time-specific-depression-like-behavior-in-the-forced-swimming-test
#13
Atsushi Haraguchi, Miyabi Fukuzawa, Shiho Iwami, Yutaro Nishimura, Hiroaki Motohashi, Yu Tahara, Shigenobu Shibata
The circadian clock system is associated with feeding and mood. Patients with night eating syndrome (NES) delay their eating rhythm and their mood declines during the evening and night, manifesting as time-specific depression. Therefore, we hypothesized that the NES feeding pattern might cause time-specific depression. We established new NES model by restricted feeding with high-fat diet during the inactive period under normal-fat diet ad libitum. The FST (forced swimming test) immobility time in the NES model group was prolonged only after lights-on, corresponding to evening and early night for humans...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317203/alpha-mangostin-attenuates-diabetic-nephropathy-in-association-with-suppression-of-acid-sphingomyelianse-and-endoplasmic-reticulum-stress
#14
Tingting Liu, Wang Duan, Paul Nizigiyimana, Lin Gao, Zhouning Liao, Boya Xu, Lerong Liu, Minxiang Lei
AIMS: Diabetic nephropathy is a common complication of diabetes, but there are currently few treatment options. The aim of this study was to gain insight into the effect of alpha-mangostin on diabetic nephropathy and possible related mechanisms. METHODS: Goto-Kakizaki rats were used as a diabetic model and received alpha-mangostin or desipramine treatment with normal saline as a control. Ten age-matched Sprague Dawley rats were used as normal controls and treated with normal saline...
February 5, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29217165/anxiolytic-and-antidepressant-like-activities-of-a-methanolic-extract-of-morinda-citrifolia-linn-noni-fruit-in-mice-involvement-of-benzodiazepine-gaba-a-ergic-serotonergic-and-adrenergic-systems
#15
Megala Narasingam, Kamini Vijeepallam, Zahurin Mohamed, Vijayapandi Pandy
This study presents anxiolytic- and antidepressant-like effects of a methanolic extract of Morinda citrifolia Linn. (noni) fruit (MMC) in well-established mouse models of anxiety and depression. The administration of MMC (1 g/kg, p.o.) and diazepam (1 mg/kg, i.p.) significantly attenuated anxiety-like behaviour in mice by increasing the percentage of time spent and number of entries in the open arms in the elevated plus maze (EPM), and significantly enhanced the exploration in the light box in the light/dark test (LDT)...
December 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29206826/-response-to-serotonergic-and-noradrenergic-antidepressants-a-crossover-study-of-fluoxetine-and-desipramine-in-patients-with-first-major-depression-episode
#16
RANDOMIZED CONTROLLED TRIAL
José Alfonso Ontiveros-Sánchez de la Barquera
BACKGROUND: Response rate data from studies with different kinds of antidepressant drugs help in the development of guidelines for the rational prescription of pharmacotherapy. However, there are still few comparative studies with selective reuptake inhibition on serotonin or norepinephrine in the same sample of major depression patients. METHODS: First episode major depression (DSM-III-R) outpatients who completed 6 weeks in two double-blind randomized trials with fluoxetine and desipramine were crossed over to treatment with the other drug under open conditions for 6 weeks...
November 2017: Gaceta Médica de México
https://www.readbyqxmd.com/read/29203420/compound-action-potential-inhibition-produced-by-various-antidepressants-in-the-frog-sciatic-nerve
#17
Ryo Hirao, Tsugumi Fujita, Aiko Sakai, Eiichi Kumamoto
Although an inhibition of action potential conduction in nerve fibers possibly contributes to at least a part of antinociception produced by analgesics and the adjuvants, it has not been fully examined yet how the conduction inhibition differs in extent among their drugs. We investigated the effects of various antidepressants used as analgesic adjuvants on compound action potentials (CAPs) recorded from the frog sciatic nerve by using the air-gap method. The results were compared with those of the other adjuvants that were reported previously...
January 15, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29202894/failure-to-detect-the-action-of-antidepressants-in-the-forced-swim-test-in-swiss-mice
#18
Patrick R Suman, Nathalia Zerbinatti, Lais Cristina Theindl, Karolina Domingues, Cilene Lino de Oliveira
OBJECTIVE: The aims of this study were to replicate previously published experiments and to modify the protocol to detect the effects of chronic antidepressant treatment in mice. METHODS: Male Swiss mice (n=6-8/group) housed in reversed light/dark cycle were randomly assigned into receive vehicle (10% sucrose), sub-effective doses (1 and 3 mg/kg) or effective doses (10 and 30 mg/kg) of bupropion, desipramine, and fluoxetine and a candidate antidepressant, sodium butyrate (1-30 mg/kg) per gavage (p...
December 5, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/29200003/effects-of-the-antidepressants-desipramine-and-fluvoxamine-on-latency-to-immobility-and-duration-of-immobility-in-the-forced-swim-test-in-adult-male-c57bl-6j-mice
#19
Wouter Koek, Thomas L Sandoval, Lynette C Daws
The forced swim test in rodents allows rapid detection of substances with antidepressant-like activity, evidenced as a decreased duration of immobility that is produced by the majority of clinically used antidepressants. Antidepressants also increase the latency to immobility, and this additional measure reportedly can increase the sensitivity of the forced swim test in mice. Extending these findings, the present study examined the effects of desipramine and fluvoxamine in a forced swim test in C57BL/6J mice, a strain commonly used as background for genetic modifications, analyzing results with a method (i...
December 1, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/29196145/effects-of-imipramine-on-cytokines-panel-in-the-rats-serum-during-the-drug-treatment-and-discontinuation
#20
M Kuśmider, A Faron-Górecka, P Pabian, J Solich, M Szlachta, M Kolasa, D Żurawek, J Wójcikowski, W Daniel, M Dziedzicka-Wasylewska
Time dependent sensitization (TDS) - phenomenon described originally by Chiodo and Antelman (1980) in context of dopamine receptors, refers to cascade of events that continue to develop in the organism, after the initiating stimulus is no longer available. Treatment could be recognized as such a initiating stimulus (in case of depression, example of electroconvulsive therapy would be obvious, but some aspects of pharmacotherapy too). The process leads to improvement, but, on the other hand, phenomena of kindling in recurrent depression is well known (more relapses and therapies make heavier and longer lasting subsequent episodes)...
February 2018: Neurochemistry International
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