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Gullino LS, Fuller C, Dunn P, Collins HM, El Mestikawy S, Sharp T. Evidence for a Role of 5-HT-glutamate Co-releasing Neurons in Acute Stress Mechanisms. ACS Chem Neurosci 2024; 15:1185-1196. [PMID: 38377469 PMCID: PMC10958520 DOI: 10.1021/acschemneuro.3c00758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/18/2024] [Accepted: 01/26/2024] [Indexed: 02/22/2024] Open
Abstract
A major subpopulation of midbrain 5-hydroxytryptamine (5-HT) neurons expresses the vesicular glutamate transporter 3 (VGLUT3) and co-releases 5-HT and glutamate, but the function of this co-release is unclear. Given the strong links between 5-HT and uncontrollable stress, we used a combination of c-Fos immunohistochemistry and conditional gene knockout mice to test the hypothesis that glutamate co-releasing 5-HT neurons are activated by stress and involved in stress coping. Acute, uncontrollable swim stress increased c-Fos immunoreactivity in neurons co-expressing VGLUT3 and the 5-HT marker tryptophan hydroxylase 2 (TPH2) in the dorsal raphe nucleus (DRN). This effect was localized in the ventral DRN subregion and prevented by the antidepressant fluoxetine. In contrast, a more controllable stressor, acute social defeat, had no effect on c-Fos immunoreactivity in VGLUT3-TPH2 co-expressing neurons in the DRN. To test whether activation of glutamate co-releasing 5-HT neurons was causally linked to stress coping, mice with a specific deletion of VGLUT3 in 5-HT neurons were exposed to acute swim stress. Compared to wildtype controls, the mutant mice showed increased climbing behavior, a measure of active coping. Wildtype mice also showed increased climbing when administered fluoxetine, revealing an interesting parallel between the behavioral effects of genetic loss of VGLUT3 in 5-HT neurons and 5-HT reuptake inhibition. We conclude that 5-HT-glutamate co-releasing neurons are recruited by exposure to uncontrollable stress. Furthermore, natural variation in the balance of 5-HT and glutamate co-released at the 5-HT synapse may impact stress susceptibility.
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Affiliation(s)
- L. Sophie Gullino
- University
Department of Pharmacology, University of
Oxford, Mansfield Road, Oxford OX1 3QT, U.K.
| | - Cara Fuller
- University
Department of Pharmacology, University of
Oxford, Mansfield Road, Oxford OX1 3QT, U.K.
| | - Poppy Dunn
- University
Department of Pharmacology, University of
Oxford, Mansfield Road, Oxford OX1 3QT, U.K.
| | - Helen M. Collins
- University
Department of Pharmacology, University of
Oxford, Mansfield Road, Oxford OX1 3QT, U.K.
| | - Salah El Mestikawy
- Douglas
Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QC H4H
1R3, Canada
- Sorbonne
Université, INSERM, CNRS, Neuroscience Paris Seine –
Institut de Biologie Paris Seine (NPS – IBPS), 75005 Paris, France
| | - Trevor Sharp
- University
Department of Pharmacology, University of
Oxford, Mansfield Road, Oxford OX1 3QT, U.K.
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Matas-Navarro P, Carratalá-Ros C, Olivares-García R, Martínez-Verdú A, Salamone JD, Correa M. Sex and age differences in mice models of effort-based decision-making and anergia in depression: the role of dopamine, and cerebral-dopamine-neurotrophic-factor. Psychopharmacology (Berl) 2023; 240:2285-2302. [PMID: 37592005 PMCID: PMC10593617 DOI: 10.1007/s00213-023-06430-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/19/2023] [Indexed: 08/19/2023]
Abstract
Mesolimbic dopamine (DA) regulates vigor in motivated behavior. While previous results have mainly been performed in male rodents, the present studies compared CD1 male and female mice in effort-based decision-making tests of motivation. These tests offered choices between several reinforcers that require different levels of effort (progressive ratio/choice task and 3-choice-T-maze task). Sweet reinforcers were used in both tasks. In the operant tasks, females worked harder as the task required more effort to access a 10% sucrose solution. Although males and females did not differ in preference for 10% vs 3% solutions under free concurrent presentation, females consumed more of the 10% solution when tested alone. The operant task requires a long period of training and changes in the DA system due to age can be mediating long-term changes in effort. Thus, age and sex factors were evaluated in the T-maze task, which requires only a short training period. Both sexes and ages were equally active when habituated to the running wheel (RW), but females consumed more sweet pellets than males, especially at an older age. Both sexes had a strong preference for the RW compared to more sedentary reinforcers in the 3-choice-T-maze test, but older animals spent less time running and ate more than the young ones. The DA-depleting agent tetrabenazine reduced time running in older mice but not in adolescents. Cerebral-dopamine-neurotrophic-factor was reduced in older mice of both sexes compared to adolescent mice. These results emphasize the importance of taking into account differences in sex and age when evaluating willingness to exert effort for specific reinforcers.
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Affiliation(s)
- Paula Matas-Navarro
- Àrea de Psicobiologia, Campus de Riu Sec, Universitat Jaume I, Castelló, 12071, Castelló de la Plana, Spain
| | - Carla Carratalá-Ros
- Àrea de Psicobiologia, Campus de Riu Sec, Universitat Jaume I, Castelló, 12071, Castelló de la Plana, Spain
| | - Régulo Olivares-García
- Àrea de Psicobiologia, Campus de Riu Sec, Universitat Jaume I, Castelló, 12071, Castelló de la Plana, Spain
| | - Andrea Martínez-Verdú
- Àrea de Psicobiologia, Campus de Riu Sec, Universitat Jaume I, Castelló, 12071, Castelló de la Plana, Spain
| | - John D Salamone
- Behavioral Neuroscience Div., Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Mercè Correa
- Àrea de Psicobiologia, Campus de Riu Sec, Universitat Jaume I, Castelló, 12071, Castelló de la Plana, Spain.
- Behavioral Neuroscience Div., Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA.
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Ngamratanapaiboon S, Pornchokchai K, Wongpitoonmanachai S, Pholkla P, Srikornvit N, Mo J, Hongthawonsiri P, Yambangyang P, Akrachalanont P. Metabolomic identification of biochemical changes induced by fluoxetine in an insulinoma cell line (MIN6). Res Pharm Sci 2023; 18:517-527. [PMID: 37842516 PMCID: PMC10568956 DOI: 10.4103/1735-5362.383707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/03/2021] [Accepted: 01/18/2023] [Indexed: 10/17/2023] Open
Abstract
Background and purpose The use of fluoxetine raises the risk of pancreatic beta-cell dysfunction. However, the specific mechanism behind its mechanism of action in beta cells is unknown. This study investigated the cellular response of MIN6 cells to fluoxetine using untargeted cell-based metabolomics. Experimental approach Metabolic profiling of MIN6 cells was performed using liquid chromatography-high resolution mass spectrometry (LC-HRMS) analysis on samples prepared under optimized conditions, followed by principal component analysis, partial least squares-discriminant analysis, and pair-wise orthogonal projections to latent structures discriminant analyses. Findings/Results Sixty-six metabolites that had been differentially expressed between the control and fluoxetine-treated groups demonstrated that the citric acid cycle is mainly perturbed by fluoxetine treatment. Conclusion and implications The current study provides insights into the molecular mechanisms of fluoxetine effects in MIN6 cells.
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Affiliation(s)
- Surachai Ngamratanapaiboon
- Division of Pharmacology, Department of Basic Medical Sciences, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Bangkok, 10300, Thailand
| | - Krittaboon Pornchokchai
- Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Bangkok, 10300, Thailand
| | | | - Petchlada Pholkla
- Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Bangkok, 10300, Thailand
| | - Napatarin Srikornvit
- Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Bangkok, 10300, Thailand
| | - Jiajun Mo
- Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Bangkok, 10300, Thailand
| | - Patipol Hongthawonsiri
- Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Bangkok, 10300, Thailand
| | - Pracha Yambangyang
- Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand
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Carratalá-Ros C, Martínez-Verdú A, Olivares-García R, Salamone JD, Correa M. Effects of the dopamine depleting agent tetrabenazine in tests evaluating different components of depressive-like behavior in mice: sex-dependent response to antidepressant drugs with SERT and DAT blocker profiles. Psychopharmacology (Berl) 2023; 240:1615-1628. [PMID: 37407727 PMCID: PMC10349713 DOI: 10.1007/s00213-023-06412-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 06/20/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND Depression is a disorder twice as common in women than in men. There are sex differences in the symptomatology and treatment response to this disorder. Impairments in behavioral activation (i.e. anergia, fatigue) are often seen in people with depression and are highly resistant to treatment. The role of mesolimbic dopamine (DA) in regulating behavioral activation has been extensively studied in male rodents, but little is known in female rodents. OBJECTIVE The present studies assessed potential sex differences in rodent paradigms used to study different components of depressive-like behavior, and in the treatment response to antidepressants with different mechanisms of action. METHODS Male and female CD1 mice received Tetrabenazine (TBZ), a VMAT-2 blocker that depletes DA and induces depressive symptoms in humans. Mice were tested on the Forced Swim Test, (FST), the Dark-Light box (DL), the elevated plus maze (EPM), Social Interaction (SI) test, and sucrose preference and consumption using the two bottles test. In addition, bupropion (a DA reuptake inhibitor) or fluoxetine (a serotonin reuptake inhibitor) were used to reverse TBZ-induced anergia. RESULTS In the FST, bupropion reversed TBZ effects in both sexes but fluoxetine was only effective in female mice. DA depletion did not affect other aspects of depression such as anxiety, sociability or sucrose consumption, and there was no interaction with bupropion on these parameters. In TBZ treated-females SERT-blockers may be effective at reversing anergia in aversive contexts (FST), and potentiating avoidance of anxiogenic stimuli. CONCLUSIONS Pro-dopaminergic antidepressants seem more efficacious at improving anergia in both sexes than SERT-blockers.
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Affiliation(s)
- Carla Carratalá-Ros
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071, Castelló, Spain
| | - Andrea Martínez-Verdú
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071, Castelló, Spain
| | | | - John D Salamone
- Behavioral Neuroscience Div, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Mercè Correa
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071, Castelló, Spain.
- Behavioral Neuroscience Div, University of Connecticut, Storrs, CT, 06269-1020, USA.
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Critical review of RDoC approaches to the study of motivation with animal models: effort valuation/willingness to work. Emerg Top Life Sci 2022; 6:515-528. [PMID: 36218385 DOI: 10.1042/etls20220008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/17/2022] [Accepted: 09/21/2022] [Indexed: 02/06/2023]
Abstract
The NIMH research domain criteria (RDoC) approach was instigated to refocus mental health research on the neural circuits that mediate psychological functions, with the idea that this would foster an understanding of the neural basis of specific psychiatric dysfunctions (i.e. 'symptoms and circuits') and ultimately facilitate treatment. As a general idea, this attempt to go beyond traditional diagnostic categories and focus on neural circuit dysfunctions related to specific symptoms spanning multiple disorders has many advantages. For example, motivational dysfunctions are present in multiple disorders, including depression, schizophrenia, Parkinson's disease, and other conditions. A critical aspect of motivation is effort valuation/willingness to work, and several clinical studies have identified alterations in effort-based decision making in various patient groups. In parallel, formal animal models focusing on the exertion of effort and effort-based decision making have been developed. This paper reviews the literature on models of effort-based motivational function in the context of a discussion of the RDoC approach, with an emphasis on the dissociable nature of distinct aspects of motivation. For example, conditions associated with depression and schizophrenia blunt the selection of high-effort activities as measured by several tasks in animal models (e.g. lever pressing, barrier climbing, wheel running). Nevertheless, these manipulations also leave fundamental aspects of hedonic reactivity, food motivation, and reinforcement intact. This pattern of effects demonstrates that the general emphasis of the RDoC on the specificity of the neural circuits mediating behavioral pathologies, and the dissociative nature of these dysfunctions, is a valid concept. Nevertheless, the specific placement of effort-related processes as simply a 'sub-construct' of 'reward processing' is empirically and conceptually problematic. Thus, while the RDoC is an excellent general framework for new ways to approach research and therapeutics, it still needs further refinement.
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Treadway MT, Salamone JD. Vigor, Effort-Related Aspects of Motivation and Anhedonia. Curr Top Behav Neurosci 2022; 58:325-353. [PMID: 35505057 DOI: 10.1007/7854_2022_355] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In this chapter we provide an overview of the pharmacological and circuit mechanisms that determine the willingness to expend effort in pursuit of rewards. A particular focus will be on the role of the mesolimbic dopamine system, as well the contributing roles of limbic and cortical brains areas involved in the evaluation, selection, and invigoration of goal-directed actions. We begin with a review of preclinical studies, which have provided key insights into the brain systems that are necessary and sufficient for effort-based decision-making and have characterized novel compounds that enhance selection of high-effort activities. Next, we summarize translational studies identifying and expanding this circuitry in humans. Finally, we discuss the relevance of this work for understanding common motivational impairments as part of the broader anhedonia symptom domain associated with mental illness, and the identification of new treatment targets within this circuitry to improve motivation and effort-expenditure.
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Affiliation(s)
| | - John D Salamone
- Department of Psychological Sciences, University of Connecticut, Storrs, CT, USA
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Ren N, Carratala-Ros C, Ecevitoglu A, Rotolo RA, Edelstein GA, Presby RE, Stevenson IH, Chrobak JJ, Salamone JD. Effects of the dopamine depleting agent tetrabenazine on detailed temporal parameters of effort-related choice responding. J Exp Anal Behav 2022; 117:331-345. [PMID: 35344599 PMCID: PMC9531143 DOI: 10.1002/jeab.754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/29/2022] [Accepted: 01/31/2022] [Indexed: 11/11/2022]
Abstract
The dopamine-depleting agent tetrabenazine alters effort-based choice, suppressing food-reinforced behaviors with high response requirements, while increasing selection of low-cost options. In the present experiments, rats were tested on a concurrent fixed ratio 5/chow feeding choice task, in which high-carbohydrate Bio-serv pellets reinforced lever pressing and lab chow was concurrently available. Detailed timing of lever pressing was monitored with an event recording system, and the temporal characteristics of operant behavior seen after 1.0 mg/kg tetrabenazine or vehicle injections were analyzed. Tetrabenazine shifted choice, decreasing lever pressing but increasing chow intake. There was a small effect on the interresponse-time distribution within ratios, but marked increases in the total duration of pauses in responding. The postreinforcement-pause (PRP) distribution was bimodal, but tetrabenazine did not increase the duration of PRPs. Tetrabenazine increased time feeding and duration and number of feeding bouts, but did not affect feeding rate or total time spent lever pressing for pellets and consuming chow. Thus, TBZ appears to predominantly affect the relative allocation of lever pressing versus chow, with little alteration in consummatory motor acts involved in chow intake. Tetrabenazine is used to model motivational symptoms in psychopathology, and these effects in rats could have implications for psychiatric research.
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Affiliation(s)
- Naxin Ren
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Carla Carratala-Ros
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA.,Area de Psicobiologia, Universitat Jaume I, Castelló, Spain
| | - Alev Ecevitoglu
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Renee A Rotolo
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Gayle A Edelstein
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Rose E Presby
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - Ian H Stevenson
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - James J Chrobak
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
| | - John D Salamone
- Dept. of Psychological Sciences, University of Connecticut, Storrs, CT, 06269-1020, USA
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Salamone J, Ecevitoglu A, Carratala-Ros C, Presby R, Edelstein G, Fleeher R, Rotolo R, Meka N, Srinath S, Masthay JC, Correa M. Complexities and Paradoxes in Understanding the Role of Dopamine in Incentive Motivation and Instrumental Action: Exertion of Effort vs. Anhedonia. Brain Res Bull 2022; 182:57-66. [DOI: 10.1016/j.brainresbull.2022.01.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 01/11/2022] [Accepted: 01/29/2022] [Indexed: 02/08/2023]
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Carratalá-Ros C, Olivares-García R, Martínez-Verdú A, Arias-Sandoval E, Salamone JD, Correa M. Energizing effects of bupropion on effortful behaviors in mice under positive and negative test conditions: modulation of DARPP-32 phosphorylation patterns. Psychopharmacology (Berl) 2021; 238:3357-3373. [PMID: 34498115 PMCID: PMC8629809 DOI: 10.1007/s00213-021-05950-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 08/02/2021] [Indexed: 11/24/2022]
Abstract
Motivational symptoms such as anergia, fatigue, and reduced exertion of effort are seen in depressed people. To model this, nucleus accumbens (Nacb) dopamine (DA) depletions are used to induce a low-effort bias in rodents tested on effort-based decision-making. We evaluated the effect of the catecholamine uptake blocker bupropion on its own, and after administration of tetrabenazine (TBZ), which blocks vesicular storage, depletes DA, and induces depressive symptoms in humans. Male CD1 mice were tested on a 3-choice-T-maze task that assessed preference between a reinforcer involving voluntary physical activity (running wheel, RW) vs. sedentary activities (sweet food pellet intake or a neutral non-social odor). Mice also were tested on the forced swim test (FST), two anxiety-related measures (dark-light box (DL), and elevated plus maze (EPM)). Expression of phosphorylated DARPP-32 (Thr34 and Thr75) was evaluated by immunohistochemistry as a marker of DA-related signal transduction. Bupropion increased selection of RW activity on the T-maze. TBZ reduced time running, but increased time-consuming sucrose, indicating an induction of a low-effort bias, but not an effect on primary sucrose motivation. In the FST, bupropion reduced immobility, increasing swimming and climbing, and TBZ produced the opposite effects. Bupropion reversed the effects of TBZ on the T-maze and the FST, and also on pDARPP32-Thr34 expression in Nacb core. None of these manipulations affected anxiety-related parameters. Thus, bupropion improved active behaviors, which were negatively motivated in the FST, and active behaviors that were positively motivated in the T-maze task, which has implications for using catecholamine uptake inhibitors for treating anergia and fatigue-like symptoms.
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Affiliation(s)
- Carla Carratalá-Ros
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071 Castelló, Spain
| | | | - Andrea Martínez-Verdú
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071 Castelló, Spain
| | - Edgar Arias-Sandoval
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071 Castelló, Spain
| | - John D. Salamone
- Behavioral Neuroscience Division, University of Connecticut, Storrs, CT 06269-1020 USA
| | - Mercè Correa
- Àrea de Psicobiologia, Universitat Jaume I, Campus de Riu Sec, 12071, Castelló, Spain.
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