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Serotonin and motivation

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https://www.readbyqxmd.com/read/29910727/caffeine-and-selective-adenosine-receptor-antagonists-as-new-therapeutic-tools-for-the-motivational-symptoms-of-depression
#1
REVIEW
Laura López-Cruz, John D Salamone, Mercè Correa
Major depressive disorder is one of the most common and debilitating psychiatric disorders. Some of the motivational symptoms of depression, such anergia (lack of self-reported energy) and fatigue are relatively resistant to traditional treatments such as serotonin uptake inhibitors. Thus, new pharmacological targets are being investigated. Epidemiological data suggest that caffeine consumption can have an impact on aspects of depressive symptomatology. Caffeine is a non-selective adenosine antagonist for A1 /A2A receptors, and has been demonstrated to modulate behavior in classical animal models of depression...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29870875/fish-oil-ameliorates-sickness-behavior-induced-by-lipopolysaccharide-in-aged-mice-through-the-modulation-of-kynurenine-pathway
#2
Marcelo Gomes de Gomes, Leandro Cattelan Souza, André Rossito Goes, Lucian Del Fabbro, Carlos Borges Filho, Franciele Donato, Marina Prigol, Cristiane Luchese, Silvane Souza Roman, Robson Luiz Puntel, Silvana Peterini Boeira, Cristiano Ricardo Jesse
Sickness behavior is an expression of a central motivational state triggered by activation of the immune system, being considered a strategy of the organism to fight infection. Sickness behavior is induced by peripheral administration of lipopolysaccharide (LPS). LPS can increase the levels of proinflammatory cytokines, which induce the activation of the kynurenine pathway (KP) and behavioral alterations. Previous studies have shown that omega-3 (n-3) polyunsaturated fatty acid (PUFA) has anti-inflammatory properties...
May 16, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29860255/changes-in-gene-expression-profiles-in-adult-rat-brain-structures-after-neonatal-action-of-dipeptidyl-peptidase-iv-inhibitors
#3
Eugene A Zubkov, Yana A Zorkina, Elena V Orshanskaya, Nadezhda N Khlebnikova, Natalia A Krupina, Vladimir P Chekhonin
BACKGROUND: Previous studies have shown the development of emotional and motivational disorders, such as anxiety-depression-like disorders with increased aggression in adolescent and adult Wistar rats, occurs after neonatal exposure to the dipeptidyl peptidase-IV (DPP-IV, EC 3.4.14.5) inhibitors diprotin A and sitagliptin (postnatal days 5-18). METHODS: In this study, using real-time PCR, we evaluated changes in the gene expression of serine protease DPP-IV and prolyl endopeptidase (PREP, EC 3...
June 1, 2018: Neuropsychobiology
https://www.readbyqxmd.com/read/29859012/effects-of-cannabidiol-plus-naltrexone-on-motivation-and-ethanol-consumption
#4
Adrián Viudez-Martínez, María S García-Gutiérrez, Ana Isabel Fraguas-Sánchez, Ana Isabel Torres-Suárez, Jorge Manzanares
BACKGROUND AND PURPOSE: The aim of this study was to explore if the administration of naltrexone (NTX) together with cannabidiol (CBD) may improve the efficacy in reducing alcohol consumption and motivation rather than any of the drugs given separately. EXPERIMENTAL APPROACH: The effects of low doses of NTX (0.7 mg/kg; p.o.) and/or CBD (20 mg/kg/day; s.c.) on ethanol consumption and motivation to drink were evaluated in the oral-ethanol self-administration paradigm in C57BL/6 mice...
June 2, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29843129/appetite-related-eating-behaviours-an-overview-of-assessment-methods-determinants-and-effects-on-children-s-weight
#5
REVIEW
Ana Freitas, Gabriela Albuquerque, Cláudia Silva, Andreia Oliveira
Identifying the underlying child-eating behaviours that contribute to weight differences across growth has been a constant challenge. This report reviews the various literature approaches for assessing appetite regulation. In doing so, it attempts to understand how appetite control develops and determines the eating habits in early childhood, and its effects on children's weight status. The interaction between homeostatic and hedonic mechanisms largely explains the appetite regulation process. Homeostatic mechanisms are mediated by the biological need to maintain the body's energy reserves, increasing the motivation to eat...
May 29, 2018: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29801770/-consequences-of-the-monoaminergic-systems-cross-talk-in-the-antidepressant-activity
#6
L Tritschler, R Gaillard, A M Gardier, D J David, J-P Guilloux
Selective serotonin reuptake inhibitors (SSRIs) are the most prescribed antidepressant treatment for treat major depressive disorders. Despite their effectiveness, only 30% of SSRI-treated patients reach remission of depressive symptoms. SSRIs by inhibiting the serotonin transporter present some limits with residual symptoms. Increasing not only serotonin but also norepinephrine and dopamine levels in limbic areas seems to improve remission. Anatomical relationships across serotoninergic, dopaminergic and noradrenergic systems suggest tight reciprocal regulations among them...
May 22, 2018: L'Encéphale
https://www.readbyqxmd.com/read/29782941/dopamine-and-serotonin-metabolism-associated-with-morphine-reward-and-its-inhibition-with-buspirone-a-study-in-the-rat-striatum
#7
Darakhshan Jabeen Haleem, Shazia Nawaz, Tabinda Salman
Adaptations within the nucleus accumbens (NAc) and caudate nucleus (CN) dopamine neurotransmission are involved in behavioral sensitization and enhanced incentive motivation towards drug paired stimuli which lead to drug addiction. Serotonin (5-hydroxytryptamine; 5-HT) can modulate dopamine neurotransmission to reduce rewarding effects of drugs of abuse. A recent study from our laboratory shows that rewarding effects of morphine are inhibited in rats co-treated with buspirone. To understand the neurochemical mechanism involved in morphine addiction and its inhibition with buspirone, present study determines the effects of buspirone, morphine and their co-administration on the metabolism of serotonin and dopamine in the NAc and CN...
May 18, 2018: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29660654/assessment-of-the-possible-roles-of-sb-269970-versus-ketanserin-on-carbon-tetrachloride-induced-liver-fibrosis-in-rats-oxidative-stress-tgf-%C3%AE-1-induced-hscs-activation-pathway
#8
Marwa Ahmed Amin Atallah, Samah M Elaidy, Mona K Tawfik
BACKGROUND: In liver fibrosis, a major morbid and mortal disease, oxidative stress motivation of hepatic stellate cells (HSCs)-into myofibroblasts terminated in collagen deposition remain the key pathophysiological deal. Serotonin (5-HT) through its HSCs-expressed receptors, especially 5-HT2A and 7, shows crucial events in fibrogenesis of chronic liver diseases. Molecular hepatic oxidative stress-fibrotic roles of 5-HT2A and 7 receptors antagonists (ketanserin and SB-269970 respectively) are still a challenging issue...
November 28, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29616335/behavioral-mechanisms-underlying-the-maternal-disruptive-effect-of-serotonin-5-ht-2a-receptor-activation-in-sprague-dawley-rats
#9
Ruiyong Wu, Collin Davis, Ming Li
Recent evidence indicates that acute activation of 5-HT2A receptors causes a disruption of maternal behavior in rats. However, the behavioral mechanisms underlying such a disruption are not known. We addressed this issue using two behavioral approaches targeting the maternal motivational and emotional processing systems. First, we used the pup-separation technique to increase maternal motivation to see whether pup separation is capable of reducing the maternal disruptive effect of TCB-2 (a high-affinity 5-HT2A agonist) treatment...
April 3, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29555337/5-ht-2c-receptors-in-the-ventral-tegmental-area-but-not-in-the-arcuate-nucleus-mediate-the-hypophagic-and-hypolocomotor-effects-of-the-selective-5-ht-2c-receptor-agonist-ar231630-in-rats
#10
Sina Faton, Jean-Pol Tassin, Flore Duranton, Didier Bagnol, Anne-Dominique Lajoix
Central serotonin systems have long been associated with the control of feeding behavior and the modulation of behavioral effects of psychostimulants. 5-HT2C receptors are present in hypothalamic centers such as the arcuate nucleus (ARC), controlling homeostatic regulation of food intake, as well as in the ventral tegmental area (VTA), a region involved in motivation aspects in multiple behaviors, including feeding. In the present study, we investigated whether the 5-HT2C receptors control amphetamine-evoked locomotor activity and regulate food consumption...
March 17, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29520239/behavioral-phenotyping-of-dopamine-transporter-knockout-rats-compulsive-traits-motor-stereotypies-and-anhedonia
#11
Stefano Cinque, Francesca Zoratto, Anna Poleggi, Damiana Leo, Luca Cerniglia, Silvia Cimino, Renata Tambelli, Enrico Alleva, Raul R Gainetdinov, Giovanni Laviola, Walter Adriani
Alterations in dopamine neurotransmission are generally associated with diseases such as attention-deficit/hyperactivity disorder (ADHD) and obsessive-compulsive disorder (OCD). Such diseases typically feature poor decision making and lack of control on executive functions and have been studied through the years using many animal models. Dopamine transporter (DAT) knockout (KO) and heterozygous (HET) mice, in particular, have been widely used to study ADHD. Recently, a strain of DAT KO rats has been developed (1)...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29520000/activation-of-serotonin-neurons-promotes-active-persistence-in-a-probabilistic-foraging-task
#12
Eran Lottem, Dhruba Banerjee, Pietro Vertechi, Dario Sarra, Matthijs Oude Lohuis, Zachary F Mainen
The neuromodulator serotonin (5-HT) has been implicated in a variety of functions that involve patience or impulse control. Many of these effects are consistent with a long-standing theory that 5-HT promotes behavioral inhibition, a motivational bias favoring passive over active behaviors. To further test this idea, we studied the impact of 5-HT in a probabilistic foraging task, in which mice must learn the statistics of the environment and infer when to leave a depleted foraging site for the next. Critically, mice were required to actively nose-poke in order to exploit a given site...
March 8, 2018: Nature Communications
https://www.readbyqxmd.com/read/29479060/a-gabaergic-cell-type-in-the-lateral-habenula-links-hypothalamic-homeostatic-and-midbrain-motivation-circuits-with-sex-steroid-signaling
#13
Limei Zhang, Vito S Hernández, Jerome D Swinny, Anil K Verma, Torsten Giesecke, Andrew C Emery, Kerim Mutig, Luis M Garcia-Segura, Lee E Eiden
The lateral habenula (LHb) has a key role in integrating a variety of neural circuits associated with reward and aversive behaviors. There is limited information about how the different cell types and neuronal circuits within the LHb coordinate physiological and motivational states. Here, we report a cell type in the medial division of the LHb (LHbM) in male rats that is distinguished by: (1) a molecular signature for GABAergic neurotransmission (Slc32a1/VGAT) and estrogen receptor (Esr1/ERα) expression, at both mRNA and protein levels, as well as the mRNA for vesicular glutamate transporter Slc17a6/VGLUT2, which we term the GABAergic estrogen-receptive neuron (GERN); (2) its axonal projection patterns, identified by in vivo juxtacellular labeling, to both local LHb and to midbrain modulatory systems; and (3) its somatic expression of receptors for vasopressin, serotonin and dopamine, and mRNA for orexin receptor 2...
February 26, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29367407/an-interaction-between-serotonin-receptor-signaling-and-dopamine-enhances-goal-directed-vigor-and-persistence-in-mice
#14
Matthew R Bailey, Olivia Goldman, Estefanía P Bello, Muhammad O Chohan, Nuri Jeong, Vanessa Winiger, Eileen Chun, Elke Schipani, Abigail Kalmbach, Joseph F Cheer, Peter D Balsam, Eleanor H Simpson
The functionally selective 5-HT2C receptor ligand SB242084 can increase motivation and have rapid onset anti-depressant-like effects. We sought to identify the specific behavioral effects of SB242084 treatment and elucidate the mechanism in female and male mice. Using a quantitative behavioral approach, we determined that SB242084 increases the vigor and persistence of goal-directed activity across different types of physical work, particularly when work requirements are demanding. We found this influence of SB242084 on effort, rather than reward to be reflected in striatal DA measured during behavior...
February 28, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29238196/the-role-of-new-antidepressants-in-clinical-practice-in-canada-a-brief-review-of-vortioxetine-levomilnacipran-er-and-vilazodone
#15
REVIEW
Roger S McIntyre
Although many branded and generic antidepressants are approved for the treatment of major depressive disorder (MDD) in Canada, efficacy and tolerability differ among patients, and new treatment options are needed. Symptom types (eg, fatigue, energy/motivation, cognition, and functioning), medication type, treatment duration, and the need for maintenance therapy are factors that may influence treatment effectiveness. Three antidepressants, vortioxetine, levomilnacipran extended-release (ER), and vilazodone have recently become available in Canada...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29195487/efficacy-of-levomilnacipran-extended-release-in-treating-major-depressive-disorder
#16
Renee-Marie Ragguett, Samantha J Yim, Peter T Ho, Roger S McIntyre
Major depressive disorder (MDD) is the leading cause of disability worldwide with a heterogeneous symptom profile. Levomilnacipran extended release (ER) (Fetzima), a SNRI, has been approved by the Food and Drug Administration for treatment of MDD. While categorized as a SNRI, in contradistinction to other approved SNRIs, levomilnacipran exhibits differential affinity for the norepinephrine reuptake transporter when compared to the serotonin reuptake transporter. Areas covered: Completed clinical trials which focused on levomilnacipran ER administered in those with MDD were included in this drug evaluation...
December 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/29127070/an-early-experience-of-mild-adversity-involving-temporary-denial-of-maternal-contact-affects-the-serotonergic-system-of-adult-male-rats-and-leads-to-a-depressive-like-phenotype-and-inability-to-adapt-to-a-chronic-social-stress
#17
Anastasia Diamantopoulou, Theodora Kalpachidou, Georgios Aspiotis, Ioannis Gampierakis, Fotini Stylianopoulou, Antonios Stamatakis
Adverse early life experiences can affect adaptability to chronic stressors and lead to depressive-like behaviors in animal models. We employed an early experience model in which rat pups during postnatal days 10-13 are exposed to a T-maze in which they learn the location of their mother motivated by the rewarding stimulus of maternal contact; one group of rats receives the expected reward, by being allowed contact with the mother upon finding her, while the other group is temporarily denied this contact (Denied Expected Reward, DER), thus experiencing mild adversity...
February 1, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29066874/optimization-of-drug-therapy-in-elderly-individuals-admitted-to-a-geriatric-unit
#18
Antoine Piau, Yoann Huet, Adeline Gallini, Laurine Andre, Bruno Vellas, Fati Nourhashemi
BACKGROUND: A substantial share of adverse drug events involves inappropriate prescribing (IP). Specialized geriatric units are supposed to pay particular attention to prescribing appropriateness and to promoting a higher prescribing quality. OBJECTIVE: The objective of this study was to evaluate the reality of such assessment and optimization in real life (usual care) in a population of elderly individuals admitted to a geriatric unit. METHOD: This is an observational study including all older patients admitted to an acute geriatric unit over a 6-month period...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29063139/dissociable-effects-of-the-kappa-opioid-receptor-agonist-nalfurafine-on-pain-itch-stimulated-and-pain-itch-depressed-behaviors-in-male-rats
#19
Matthew L Lazenka, Megan J Moerke, E Andrew Townsend, Kevin B Freeman, F Ivy Carroll, S Stevens Negus
RATIONALE: Nalfurafine is a G protein signaling-biased kappa opioid receptor (KOR) agonist approved in Japan for second-line treatment of uremic pruritus. Neither nalfurafine nor any other KOR agonist is currently approved anywhere for treatment of pain, but recent evidence suggests that G protein signaling-biased KOR agonists may have promise as candidate analgesics/antipruritics with reduced side effects compared to nonbiased or ß-arrestin-signaling-biased KOR agonists. OBJECTIVES: This study compared nalfurafine effects in rats using assays of pain-stimulated and pain-depressed behavior used previously to evaluate other candidate analgesics...
January 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29042433/serotonin-decreases-the-gain-of-visual-responses-in-awake-macaque-v1
#20
Lenka Seillier, Corinna Lorenz, Katsuhisa Kawaguchi, Torben Ott, Andreas Nieder, Paria Pourriahi, Hendrikje Nienborg
Serotonin, an important neuromodulator in the brain, is implicated in affective and cognitive functions. However, its role even for basic cortical processes is controversial. For example, in the mammalian primary visual cortex (V1), heterogenous serotonergic modulation has been observed in anesthetized animals. Here, we combined extracellular single-unit recordings with iontophoresis in awake animals. We examined the role of serotonin on well-defined tuning properties (orientation, spatial frequency, contrast, and size) in V1 of two male macaque monkeys...
November 22, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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