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serotonin and accumbens

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https://www.readbyqxmd.com/read/28474759/a-simple-and-sensitive-high-performance-liquid-chromatography-electrochemical-detection-assay-for-the-quantitative-determination-of-monoamines-and-respective-metabolites-in-six-discrete-brain-regions-of-mice
#1
Serena A Allen, Stephanie Rednour, Samantha Shepard, Brooks Barnes Pond
A rapid, sensitive, and reproducible assay is described for the quantitative determination of the monoamine neurotransmitters dopamine, norepinephrine, and serotonin, their metabolites, and the internal standard 3,4- dihydroxybenzlyamine hydro-bromide (DHBA) in mouse brain homogenate using high performance liquid chromatography with electrochemical detection. The method was validated in the following brain areas: frontal cortex, striatum, nucleus accumbens, hippocampus, substantia nigra pars compacta, and ventral tegmental area...
May 5, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28472632/the-involvement-of-brain-derived-neurotrophic-factor-in-3-4-methylenedioxymethamphetamine-induced-place-preference-and-behavioral-sensitization
#2
Akihiro Mouri, Yukihiro Noda, Minae Niwa, Yurie Matsumoto, Takayoshi Mamiya, Atsumi Nitta, Kiyofumi Yamada, Shoei Furukawa, Tatsunori Iwamura, Toshitaka Nabeshima
3,4-Methylenedioxymethamphetamine (MDMA) is known to induce dependence and psychosis in humans. Brain-derived neurotrophic factor (BDNF) is involved in the synaptic plasticity and neurotrophy in midbrain dopaminergic neurons. This study aimed to investigate the role of BDNF in MDMA-induced dependence and psychosis. A single dose of MDMA (10mg/kg) induced BDNF mRNA expression in the prefrontal cortex, nucleus accumbens, and amygdala, but not in the striatum or the hippocampus. However, repeated MDMA administration for 7 days induced BDNF mRNA expression in the striatum and hippocampus...
May 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28419642/nicotine-induced-molecular-alterations-are-modulated-by-gabab-receptor-activity
#3
Andres P Varani, Valeria T Pedrón, Amira J Aon, Christian Höcht, Gabriela B Acosta, Bernhard Bettler, Graciela N Balerio
It has been demonstrated that GABAB receptors modulate nicotine (NIC) reward effect; nevertheless, the mechanism implicated is not well known. In this regard, we evaluated the involvement of GABAB receptors on the behavioral, neurochemical, biochemical and molecular alterations associated with the rewarding effects induced by NIC in mice, from a pharmacological and genetic approach. NIC-induced rewarding properties (0.5 mg/kg, subcutaneously, sc) were evaluated by conditioned place preference (CPP) paradigm...
April 17, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28376679/dopamine-and-%C3%AE-opioid-receptor-dysregulation-in-the-brains-of-binge-eating-female-rats-possible-relevance-in-the-psychopathology-and-treatment-of-binge-eating-disorder
#4
David J Heal, Michelle Hallam, Michael Prow, Jane Gosden, Sharon Cheetham, Yong K Choi, Frank Tarazi, Peter Hutson
Adult, female rats given irregular, limited access to chocolate develop binge-eating behaviour with normal bodyweight and compulsive/perseverative and impulsive behaviours similar to those in binge-eating disorder. We investigated whether (a) dysregulated central nervous system dopaminergic and opioidergic systems are part of the psychopathology of binge-eating and (b) these neurotransmitter systems may mediate the actions of drugs ameliorating binge-eating disorder psychopathology. Binge-eating produced a 39% reduction of striatal D1 receptors with 22% and 23% reductions in medial and lateral caudate putamen and a 22% increase of striatal μ-opioid receptors...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28339662/hiv-1-proteins-influence-novelty-seeking-behavior-and-alter-region-specific-transcriptional-responses-to-chronic-nicotine-treatment-in-hiv-1tg-rats
#5
Zhongli Yang, Tanseli Nesil, Taylor Wingo, Sulie L Chang, Ming D Li
Introduction: Clinical studies suggest that HIV-1-infected patients are more likely to use or abuse addictive drugs than is the general population. We hypothesized that HIV-1 proteins impact novelty-seeking behavior and enhance the transcriptional response to nicotine in genes implicated in both novelty-seeking behavior and drug addiction. Methods: We assessed the effects of HIV-1 proteins on novelty-seeking behavior by comparing baseline activity differences of HIV-1Tg and F344 control rats in the open-field test...
February 17, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28287691/effects-of-housing-on-methamphetamine-induced-neurotoxicity-and-spatial-learning-and-memory
#6
Arnold Gutierrez, Sarah A Jablonski, Robyn M Amos-Kroohs, Anna C Barnes, Michael T Williams, Charles V Vorhees
Severe stress potentiates methamphetamine (MA) neurotoxicity. However, whether moderate stress increases or decreases the neurotoxic effects of MA is unknown. We assessed the effects of MA (4 × 10 mg/kg at 2 h intervals) in combination with prior barren-cage housing in adult male Sprague-Dawley rats on monoamines and glial fibrillary acid protein (GFAP) in one cohort and spatial learning and memory in the Morris water maze in another cohort. MA reduced dopamine (DA) and serotonin (5-HT) in the neostriatum and nucleus accumbens, 5-HT in the hippocampus, and increased GFAP in neostriatum and nucleus accumbens compared with saline controls...
March 27, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28266501/the-novel-modafinil-analog-jjc8-016-as-a-potential-cocaine-abuse-pharmacotherapeutic
#7
Hai-Ying Zhang, Guo-Hua Bi, Hong-Ju Yang, Yi He, Gilbert Xue, Jiajing Cao, Gianluigi Tanda, Eliot L Gardner, Amy Hauck Newman, Zheng-Xiong Xi
(±)Modafinil ((±)MOD) and its R-enantiomer (R-modafinil; R-MOD) have been investigated for their potential as treatments for psychostimulant addiction. We recently reported a series of (±)MOD analogs, of which JJC8-016 (N-(2-((bis(4-fluorophenyl)methyl)thio)ethyl)-3-phenylpropan-1-amine) was selected for further development. JJC8-016 and R-MOD were evaluated for binding across ~70 receptors, transporters, and enzymes. Although at a concentration of 10 μM, there were many hits for JJC8-016, binding affinities in the range of its DAT affinity were only observed at the serotonin transporter (SERT), dopamine D2-like, and sigma1 receptors...
March 29, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28225852/tryptophan-overloading-activates-brain-regions-involved-with-cognition-mood-and-anxiety
#8
Luana C A Silva, Milena B Viana, José S Andrade, Melyssa A Souza, Isabel C Céspedes, Vânia D'Almeida
Tryptophan is the only precursor of serotonin and mediates serotonergic activity in the brain. Previous studies have shown that the administration of tryptophan or tryptophan depletion significantly alters cognition, mood and anxiety. Nevertheless, the neurobiological alterations that follow these changes have not yet been fully investigated. The aim of this study was to verify the effects of a tryptophan-enriched diet on immunoreactivity to Fos-protein in the rat brain. Sixteen male Wistar rats were distributed into two groups that either received standard chow diet or a tryptophan-enriched diet for a period of thirty days...
January 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28115218/contrasting-effects-of-5-ht3-receptor-stimulation-of-the-nucleus-accumbens-or-ventral-tegmentum-on-food-intake-in-the-rat
#9
Wayne E Pratt, Peagan Lin, Zachary Pierce-Messick, Adeolu O Ilesanmi, Kara A Clissold
Although serotonin (5-HT) signaling is known to regulate food intake and energy homeostasis, the roles of the 5-HT3 receptor in feeding processes have been elusive. 5-HT3 receptors are found throughout mesolimbic circuitry that promote feeding not only in response to hunger, but also to the palatable and rewarding properties of food. These experiments examined if stimulation or blockade of the 5-HT3 receptor of the nucleus accumbens (NAcc) or ventral tegmentum affected food intake in the rat in response to hunger or the presence of a palatable diet...
April 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28059046/long-term-effects-of-aripiprazole-exposure-on-monoaminergic-and-glutamatergic-receptor-subtypes-comparison-with-cariprazine
#10
Yong Kee Choi, Nika Adham, Béla Kiss, István Gyertyán, Frank I Tarazi
OBJECTIVE: This study examined the chronic effects of aripiprazole and cariprazine on serotonin (5-HT1A and 5-HT2A) and glutamate (NMDA and AMPA) receptor subtypes. In addition, the effects of aripiprazole on D2 and D3 receptors were tested and compared with previously reported cariprazine data. METHODS: Rats received vehicle, aripiprazole (2, 5, or 15 mg/kg), or cariprazine (0.06, 0.2, or 0.6 mg/kg) for 28 days. Receptor levels were quantified using autoradiographic assays on brain sections from the medial prefrontal cortex (MPC), dorsolateral frontal cortex (DFC), nucleus accumbens (NAc), caudate-putamen medial (CPu-M), caudate-putamen lateral (CPu-L), hippocampal CA1 (HIPP-CA1) and CA3 (HIPP-CA3) regions, and the entorhinal cortex (EC)...
January 6, 2017: CNS Spectrums
https://www.readbyqxmd.com/read/27991542/adjunctive-treatment-of-brexpiprazole-with-fluoxetine-shows-a-rapid-antidepressant-effect-in-social-defeat-stress-model-role-of-bdnf-trkb-signaling
#11
Min Ma, Qian Ren, Chun Yang, Ji-Chun Zhang, Wei Yao, Chao Dong, Yuta Ohgi, Takashi Futamura, Kenji Hashimoto
Addition of low doses of the atypical antipsychotic drug brexpiprazole with selective serotonin reuptake inhibitors (SSRIs) could promote antidepressant effect in patients with major depressive disorder although the precise mechanisms underlying the action of the combination are unknown. Combination of low dose of brexpiprazole (0.1 mg/kg) and SSRI fluoxetine (10 mg/kg) could promote a rapid antidepressant effect in social defeat stress model although brexpiprazole or fluoxetine alone did not show antidepressant effect...
December 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27987210/anti-anhedonic-effect-of-selective-serotonin-reuptake-inhibitors-with-affinity-for-sigma-1-receptors-in-picrotoxin-treated-mice
#12
S Hasebe, Y Ago, Y Watabe, S Oka, N Hiramatsu, T Tanaka, C Umehara, H Hashimoto, K Takuma, T Matsuda
BACKGROUND AND PURPOSE: Prefrontal dopamine release by the combined activation of 5-HT1A and sigma-1 (σ1 ) receptors is enhanced by the GABAA receptor antagonist picrotoxin in mice. Here, we examined whether this neurochemical event was accompanied by behavioural changes. EXPERIMENTAL APPROACH: Male mice were treated with picrotoxin to decrease GABAA receptor function. Their anhedonic behaviour was measured using the female encounter test. The expression of c-Fos was determined immunohistochemically...
February 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/27957784/d-cycloserine-enhanced-extinction-of-cocaine-induced-conditioned-place-preference-is-attenuated-in-serotonin-transporter-knockout-rats
#13
Peter Karel, Francesca Calabrese, Marco Riva, Paola Brivio, Bas Van der Veen, Liesbeth Reneman, Michel Verheij, Judith Homberg
d-Cycloserine (DCS), a partial NMDA receptor agonist, has been proposed as a cognitive enhancer to facilitate the extinction of drug-related memories. However, it is unknown whether there are individual differences in the efficacy of DCS. Here, we set out to investigate the influence of serotonin transporter (5-HTT) genotype on DCS treatment outcome and the underlying neural mechanism. To that end, we first determined the mRNA levels of several NMDA receptor subunits and observed a reduction in NR1/NR2C receptors in the ventromedial prefrontal cortex and nucleus accumbens of 5-HTT(-/-) compared with 5-HTT(+/+) rats...
December 12, 2016: Addiction Biology
https://www.readbyqxmd.com/read/27903793/the-serotonin-5-ht2c-receptor-and-the-non-addictive-nature-of-classic-hallucinogens
#14
Clinton E Canal, Kevin S Murnane
Classic hallucinogens share pharmacology as serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor agonists. Unique among most other Schedule 1 drugs, they are generally non-addictive and can be effective tools in the treatment of addiction. Mechanisms underlying these attributes are largely unknown. However, many preclinical studies show that 5-HT2C agonists counteract the addictive effects of drugs from several classes, suggesting this pharmacological property of classic hallucinogens may be significant. Drawing from a comprehensive analysis of preclinical behavior, neuroanatomy, and neurochemistry studies, this review builds rationale for this hypothesis, and also proposes a testable, neurobiological framework...
January 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27888043/infusion-of-fluoxetine-a-serotonin-reuptake-inhibitor-in-the-shell-region-of-the-nucleus-accumbens-increases-blood-glucose-concentrations-in-rats
#15
C Diepenbroek, M Rijnsburger, L Eggels, K M van Megen, M T Ackermans, E Fliers, A Kalsbeek, M J Serlie, S E la Fleur
The brain is well known to regulate blood glucose, and the hypothalamus and hindbrain, in particular, have been studied extensively to understand the underlying mechanisms. Nuclei in these regions respond to alterations in blood glucose concentrations and can alter glucose liver output or glucose tissue uptake to maintain blood glucose concentrations within strict boundaries. Interestingly, several cortico-limbic regions also respond to alterations in glucose concentrations and have been shown to project to hypothalamic nuclei and glucoregulatory organs...
January 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/27857753/serotonin-regulates-brain-derived-neurotrophic-factor-expression-in-select-brain-regions-during-acute-psychological-stress
#16
De-Guo Jiang, Shi-Li Jin, Gong-Ying Li, Qing-Qing Li, Zhi-Ruo Li, Hong-Xia Ma, Chuan-Jun Zhuo, Rong-Huan Jiang, Min-Jie Ye
Previous studies suggest that serotonin (5-HT) might interact with brain-derived neurotrophic factor (BDNF) during the stress response. However, the relationship between 5-HT and BDNF expression under purely psychological stress is unclear. In this study, one hour before psychological stress exposure, the 5-HT1A receptor agonist 8-OH-DPAT or antagonist MDL73005, or the 5-HT2A receptor agonist DOI or antagonist ketanserin were administered to rats exposed to psychological stress. Immunohistochemistry and in situ hybridization revealed that after psychological stress, with the exception of the ventral tegmental area, BDNF protein and mRNA expression levels were higher in the 5-HT1A and the 5-HT2A receptor agonist groups compared with the solvent control no-stress or psychological stress group in the CA1 and CA3 of the hippocampus, prefrontal cortex, central amygdaloid nucleus, dorsomedial hypothalamic nucleus, dentate gyrus, shell of the nucleus accumbens and the midbrain periaqueductal gray...
September 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27844095/antidepressant-effects-of-combination-of-brexpiprazole-and-fluoxetine-on-depression-like-behavior-and-dendritic-changes-in-mice-after-inflammation
#17
Min Ma, Qian Ren, Chun Yang, Ji-Chun Zhang, Wei Yao, Chao Dong, Yuta Ohgi, Takashi Futamura, Kenji Hashimoto
RATIONALE: Addition of low doses of atypical antipsychotic drugs with selective serotonin reuptake inhibitors (SSRIs) could promote a rapid antidepressant effect in treatment-resistant patients with major depression. Brexpiprazole, a new atypical antipsychotic drug, has been used as adjunctive therapy for the treatment of major depression. OBJECTIVES: The present study was undertaken to examine whether brexpiprazole could augment antidepressant effects of the SSRI fluoxetine in an inflammation model of depression...
February 2017: Psychopharmacology
https://www.readbyqxmd.com/read/27824354/serotonergic-modulation-of-waiting-impulsivity-is-mediated-by-the-impulsivity-phenotype-in-humans
#18
S Neufang, A Akhrif, C G Herrmann, C Drepper, G A Homola, J Nowak, J Waider, A G Schmitt, K-P Lesch, M Romanos
In rodents, the five-choice serial reaction time task (5-CSRTT) has been established as a reliable measure of waiting impulsivity being defined as the ability to regulate a response in anticipation of reinforcement. Key brain structures are the nucleus accumbens (NAcc) and prefrontal regions (for example, pre- and infralimbic cortex), which are, together with other transmitters, modulated by serotonin. In this functional magnetic resonance imaging study, we examined 103 healthy males while performing the 5-CSRTT measuring brain activation in humans by means of a paradigm that has been widely applied in rodents...
November 8, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27821848/depression-like-phenotype-by-deletion-of-%C3%AE-7-nicotinic-acetylcholine-receptor-role-of-bdnf-trkb-in-nucleus-accumbens
#19
Ji-Chun Zhang, Wei Yao, Qian Ren, Chun Yang, Chao Dong, Min Ma, Jin Wu, Kenji Hashimoto
The α7 subtype of nicotinic acetylcholine receptor (nAChR) plays a role in the inflammation which is implicated in depression. This study was undertaken to examine the role of α7 nAChR in depression using α7 nAChR knock-out (KO) mice. Serum levels of tumor necrosis factor-α and interlukin-1β in KO mice were higher than wild-type mice, suggesting an inflammatory process in KO mice. α7 nAChR KO mice showed depression-like phenotype. Furthermore, KO mice showed increased brain-derived neurotrophic factor (BDNF) and its receptor TrkB signaling, as well as increased synaptogenesis and spine density in the nucleus accumbens (NAc), although BDNF-TrkB signaling and synaptogenesis were not altered in the prefrontal cortex and hippocampus...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27755991/risperidone-and-escitalopram-co-administration-a-potential-treatment-of-schizophrenia-symptoms-with-less-side-effects
#20
Katarzyna Kamińska, Karolina Noworyta-Sokołowska, Alexandra Jurczak, Anna Górska, Zofia Rogóż, Krystyna Gołembiowska
BACKGROUND: Schizophrenia is a psychiatric disorder characterized by positive and negative symptoms often accompanied by depression and cognitive deficits. Positive symptoms, like delusions and hallucinations are caused by an excess of dopamine (DA) signaling and are treated with the second generation antipsychotic drugs. Negative symptoms of schizophrenia are represented by social withdrawal, apathy and blunted emotional response. It was demonstrated that co-administration of risperidone and selective serotonin reuptake inhibitors alleviated depressive symptoms and cognitive dysfunction in animal models of schizophrenia...
February 2017: Pharmacological Reports: PR
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