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Feng YY, Bromberg-Martin ES, Monosov IE. Dorsal raphe neurons integrate the values of reward amount, delay, and uncertainty in multi-attribute decision-making. Cell Rep 2024; 43:114341. [PMID: 38878290 DOI: 10.1016/j.celrep.2024.114341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 03/27/2024] [Accepted: 05/23/2024] [Indexed: 06/25/2024] Open
Abstract
The dorsal raphe nucleus (DRN) is implicated in psychiatric disorders that feature impaired sensitivity to reward amount, impulsivity when facing reward delays, and risk-seeking when confronting reward uncertainty. However, it has been unclear whether and how DRN neurons signal reward amount, reward delay, and reward uncertainty during multi-attribute value-based decision-making, where subjects consider these attributes to make a choice. We recorded DRN neurons as monkeys chose between offers whose attributes, namely expected reward amount, reward delay, and reward uncertainty, varied independently. Many DRN neurons signaled offer attributes, and this population tended to integrate the attributes in a manner that reflected monkeys' preferences for amount, delay, and uncertainty. After decision-making, in response to post-decision feedback, these same neurons signaled signed reward prediction errors, suggesting a broader role in tracking value across task epochs and behavioral contexts. Our data illustrate how the DRN participates in value computations, guiding theories about the role of the DRN in decision-making and psychiatric disease.
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Affiliation(s)
- Yang-Yang Feng
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, USA; Department of Biomedical Engineering, Washington University, St. Louis, MO, USA
| | | | - Ilya E Monosov
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, USA; Department of Biomedical Engineering, Washington University, St. Louis, MO, USA; Washington University Pain Center, Washington University, St. Louis, MO, USA; Department of Neurosurgery, Washington University, St. Louis, MO, USA; Department of Electrical Engineering, Washington University, St. Louis, MO, USA.
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Vike NL, Bari S, Stefanopoulos L, Lalvani S, Kim BW, Maglaveras N, Block M, Breiter HC, Katsaggelos AK. Predicting COVID-19 Vaccination Uptake Using a Small and Interpretable Set of Judgment and Demographic Variables: Cross-Sectional Cognitive Science Study. JMIR Public Health Surveill 2024; 10:e47979. [PMID: 38315620 PMCID: PMC10953811 DOI: 10.2196/47979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/08/2023] [Accepted: 01/10/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND Despite COVID-19 vaccine mandates, many chose to forgo vaccination, raising questions about the psychology underlying how judgment affects these choices. Research shows that reward and aversion judgments are important for vaccination choice; however, no studies have integrated such cognitive science with machine learning to predict COVID-19 vaccine uptake. OBJECTIVE This study aims to determine the predictive power of a small but interpretable set of judgment variables using 3 machine learning algorithms to predict COVID-19 vaccine uptake and interpret what profile of judgment variables was important for prediction. METHODS We surveyed 3476 adults across the United States in December 2021. Participants answered demographic, COVID-19 vaccine uptake (ie, whether participants were fully vaccinated), and COVID-19 precaution questions. Participants also completed a picture-rating task using images from the International Affective Picture System. Images were rated on a Likert-type scale to calibrate the degree of liking and disliking. Ratings were computationally modeled using relative preference theory to produce a set of graphs for each participant (minimum R2>0.8). In total, 15 judgment features were extracted from these graphs, 2 being analogous to risk and loss aversion from behavioral economics. These judgment variables, along with demographics, were compared between those who were fully vaccinated and those who were not. In total, 3 machine learning approaches (random forest, balanced random forest [BRF], and logistic regression) were used to test how well judgment, demographic, and COVID-19 precaution variables predicted vaccine uptake. Mediation and moderation were implemented to assess statistical mechanisms underlying successful prediction. RESULTS Age, income, marital status, employment status, ethnicity, educational level, and sex differed by vaccine uptake (Wilcoxon rank sum and chi-square P<.001). Most judgment variables also differed by vaccine uptake (Wilcoxon rank sum P<.05). A similar area under the receiver operating characteristic curve (AUROC) was achieved by the 3 machine learning frameworks, although random forest and logistic regression produced specificities between 30% and 38% (vs 74.2% for BRF), indicating a lower performance in predicting unvaccinated participants. BRF achieved high precision (87.8%) and AUROC (79%) with moderate to high accuracy (70.8%) and balanced recall (69.6%) and specificity (74.2%). It should be noted that, for BRF, the negative predictive value was <50% despite good specificity. For BRF and random forest, 63% to 75% of the feature importance came from the 15 judgment variables. Furthermore, age, income, and educational level mediated relationships between judgment variables and vaccine uptake. CONCLUSIONS The findings demonstrate the underlying importance of judgment variables for vaccine choice and uptake, suggesting that vaccine education and messaging might target varying judgment profiles to improve uptake. These methods could also be used to aid vaccine rollouts and health care preparedness by providing location-specific details (eg, identifying areas that may experience low vaccination and high hospitalization).
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Affiliation(s)
- Nicole L Vike
- Department of Computer Science, University of Cincinnati, Cincinnati, OH, United States
| | - Sumra Bari
- Department of Computer Science, University of Cincinnati, Cincinnati, OH, United States
| | - Leandros Stefanopoulos
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, United States
- School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Shamal Lalvani
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, United States
| | - Byoung Woo Kim
- Department of Computer Science, University of Cincinnati, Cincinnati, OH, United States
| | - Nicos Maglaveras
- School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Martin Block
- Integrated Marketing Communications, Medill School, Northwestern University, Evanston, IL, United States
| | - Hans C Breiter
- Department of Computer Science, University of Cincinnati, Cincinnati, OH, United States
- Department of Psychiatry, Massachusetts General Hospital, Harvard School of Medicine, Boston, MA, United States
| | - Aggelos K Katsaggelos
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, United States
- Department of Computer Science, Northwestern University, Evanston, IL, United States
- Department of Radiology, Northwestern University, Evanston, IL, United States
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Madhyastha S, Rao MS, Renno WM. Serotonergic and Adrenergic Neuroreceptor Manipulation Ameliorates Core Symptoms of ADHD through Modulating Dopaminergic Receptors in Spontaneously Hypertensive Rats. Int J Mol Sci 2024; 25:2300. [PMID: 38396978 PMCID: PMC10888658 DOI: 10.3390/ijms25042300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
The core symptoms of attention deficit hyperactivity disorder (ADHD) are due to the hypofunction of the brain's adrenergic (NE) and dopamine (DA) systems. Drugs that enhance DA and NE neurotransmission in the brain by blocking their transporters or receptors are the current therapeutic strategies. Of late, the emerging results point out the serotonergic (5-HT) system, which indirectly modulates the DA activity in reducing the core symptoms of ADHD. On this basis, second-generation antipsychotics, which utilize 5-HT receptors, were prescribed to children with ADHD. However, it is not clear how serotonergic receptors modulate the DA activity to minimize the symptoms of ADHD. The present study investigates the efficacy of serotonergic and alpha-2 adrenergic receptor manipulation in tackling the core symptoms of ADHD and how it affects the DA neuroreceptors in the brain regions involved in ADHD. Fifteen-day-old male spontaneously hypertensive rats (SHRs) received 5-HT1A agonist (ipsapirone) or 5-HT2A antagonist (MDL 100907) (i.p.) or alpha-2 agonist (GFC) from postnatal days 15 to 42 along with age-matched Wistar Kyoto rats (WKY) (n = 8 in each group). ADHD-like behaviors were assessed using a battery of behavioral tests during postnatal days 44 to 65. After the behavioral tests, rat brains were processed to estimate the density of 5-HT1A, 5-HT2A, DA-D1, and DA-D2 neuroreceptors in the prefrontal cortex, the striatum, and the substantia nigra. All three neuroreceptor manipulations were able to minimize the core symptoms of ADHD in SHRs. The positive effect was mainly associated with the upregulation of 5-HT2A receptors in all three areas investigated, while 5-HT1A was in the prefrontal cortex and the substantia nigra. Further, the DA-D1 receptor expression was downregulated by all three neuroreceptor manipulations except for alpha-2 adrenergic receptor agonists in the striatum and 5-HT2A antagonists in the substantia nigra. The DA-D2 expression was upregulated in the striatum while downregulated in the prefrontal cortex and the substantia nigra. In this animal model study, the 5-HT1A agonist or 5-HT2A antagonist monotherapies were able to curtail the ADHD symptoms by differential expression of DA receptors in different regions of the brain.
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Affiliation(s)
- Sampath Madhyastha
- Department of Anatomy, College of Medicine, Kuwait University, Safat 13110, Kuwait; (M.S.R.); (W.M.R.)
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Feng YY, Bromberg-Martin ES, Monosov IE. Dorsal raphe neurons signal integrated value during multi-attribute decision-making. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.17.553745. [PMID: 37662243 PMCID: PMC10473596 DOI: 10.1101/2023.08.17.553745] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
The dorsal raphe nucleus (DRN) is implicated in psychiatric disorders that feature impaired sensitivity to reward amount, impulsivity when facing reward delays, and risk-seeking when grappling with reward uncertainty. However, whether and how DRN neurons signal reward amount, reward delay, and reward uncertainty during multi-attribute value-based decision-making, where subjects consider all these attributes to make a choice, is unclear. We recorded DRN neurons as monkeys chose between offers whose attributes, namely expected reward amount, reward delay, and reward uncertainty, varied independently. Many DRN neurons signaled offer attributes. Remarkably, these neurons commonly integrated offer attributes in a manner that reflected monkeys' overall preferences for amount, delay, and uncertainty. After decision-making, in response to post-decision feedback, these same neurons signaled signed reward prediction errors, suggesting a broader role in tracking value across task epochs and behavioral contexts. Our data illustrate how DRN participates in integrated value computations, guiding theories of DRN in decision-making and psychiatric disease.
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Affiliation(s)
- Yang-Yang Feng
- Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri, USA
| | | | - Ilya E. Monosov
- Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri, USA
- Washington University Pain Center, Washington University, St. Louis, Missouri, USA
- Department of Neurosurgery, Washington University, St. Louis, Missouri, USA
- Department of Electrical Engineering, Washington University, St. Louis, Missouri, USA
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Gacoin M, Ben Hamed S. Fluoxetine degrades luminance perceptual thresholds while enhancing motivation and reward sensitivity. Front Pharmacol 2023; 14:1103999. [PMID: 37153796 PMCID: PMC10157648 DOI: 10.3389/fphar.2023.1103999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/30/2023] [Indexed: 05/10/2023] Open
Abstract
Selective serotonin reuptake inhibitors (SSRIs) increase serotonin activity in the brain. While they are mostly known for their antidepressant properties, they have been shown to improve visual functions in amblyopia and impact cognitive functions ranging from attention to motivation and sensitivity to reward. Yet, a clear understanding of the specific action of serotonin to each of bottom-up sensory and top-down cognitive control components and their interaction is still missing. To address this question, we characterize, in two adult male macaques, the behavioral effects of fluoxetine, a specific SSRI, on visual perception under varying bottom-up (luminosity, distractors) and top-down (uncertainty, reward biases) constraints while they are performing three different visual tasks. We first manipulate target luminosity in a visual detection task, and we show that fluoxetine degrades luminance perceptual thresholds. We then use a target detection task in the presence of spatial distractors, and we show that under fluoxetine, monkeys display both more liberal responses as well as a degraded perceptual spatial resolution. In a last target selection task, involving free choice in the presence of reward biases, we show that monkeys display an increased sensitivity to reward outcome under fluoxetine. In addition, we report that monkeys produce, under fluoxetine, more trials and less aborts, increased pupil size, shorter blink durations, as well as task-dependent changes in reaction times. Overall, while low level vision appears to be degraded by fluoxetine, performances in the visual tasks are maintained under fluoxetine due to enhanced top-down control based on task outcome and reward maximization.
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Affiliation(s)
- Maëva Gacoin
- *Correspondence: Maëva Gacoin, ; Suliann Ben Hamed,
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Liu L, Artigas SO, Ulrich A, Tardu J, Mohr PNC, Wilms B, Koletzko B, Schmid SM, Park SQ. Eating to dare - Nutrition impacts human risky decision and related brain function. Neuroimage 2021; 233:117951. [PMID: 33722669 DOI: 10.1016/j.neuroimage.2021.117951] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/02/2021] [Accepted: 03/06/2021] [Indexed: 10/21/2022] Open
Abstract
Macronutrient composition modulates plasma amino acids that are precursors of neurotransmitters and can impact brain function and decisions. Neurotransmitter serotonin has been shown to regulate not only food intake, but also economic decisions. We investigated whether an acute nutrition-manipulation inducing plasma tryptophan fluctuation affects brain function, thereby affecting risky decisions. Breakfasts differing in carbohydrate/protein ratios were offered to test changes in risky decision-making while metabolic and neural dynamics were tracked. We identified that a high-carbohydrate/protein breakfast increased plasma tryptophan/LNAA (large neutral amino acids) ratio which mapped to individual risk propensity changes. The nutrition-manipulation and tryptophan/LNAA fluctuation effects on risk propensity changes were further modulated by individual differences in body fat mass. Using fMRI, we further identified activation in the parietal lobule during risk-processing, of which activities 1) were sensitive to the tryptophan/LNAA fluctuation, 2) were modulated by individual's body fat mass, and 3) predicted the risk propensity changes in decision-making. Our results provide evidence for a personalized nutrition-driven modulation on human risky decision and its metabolic and neural mechanisms.
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Affiliation(s)
- Lu Liu
- Department of Decision Neuroscience & Nutrition, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; Department of Psychology, University of Lübeck, Lübeck, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany.
| | | | - Anja Ulrich
- Institute for Endocrinology & Diabetes, University of Lübeck, Lübeck, Germany
| | - Jeremy Tardu
- Institute for Endocrinology & Diabetes, University of Lübeck, Lübeck, Germany
| | - Peter N C Mohr
- School of Business and Economics, Freie Universität Berlin, Germany; WZB Berlin Social Science Center, Berlin, Germany; Center for Cognitive Neuroscience Berlin, Freie Universität Berlin, Berlin, Germany
| | - Britta Wilms
- German Center for Diabetes Research (DZD), Neuherberg, Germany; Institute for Endocrinology & Diabetes, University of Lübeck, Lübeck, Germany
| | - Berthold Koletzko
- Dr. von Hauner Children's Hospital, University of Munich Medical Center, Ludwig-Maximilians-Universität Munich, Munich, Germany
| | - Sebastian M Schmid
- German Center for Diabetes Research (DZD), Neuherberg, Germany; Institute for Endocrinology & Diabetes, University of Lübeck, Lübeck, Germany
| | - Soyoung Q Park
- Department of Decision Neuroscience & Nutrition, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; Department of Psychology, University of Lübeck, Lübeck, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; Neuroscience Research Center, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Neuroscience Research Center, Berlin, Germany.
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Tsvetanov KA, Henson RNA, Rowe JB. Separating vascular and neuronal effects of age on fMRI BOLD signals. Philos Trans R Soc Lond B Biol Sci 2021; 376:20190631. [PMID: 33190597 PMCID: PMC7741031 DOI: 10.1098/rstb.2019.0631] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2020] [Indexed: 12/14/2022] Open
Abstract
Accurate identification of brain function is necessary to understand the neurobiology of cognitive ageing, and thereby promote well-being across the lifespan. A common tool used to investigate neurocognitive ageing is functional magnetic resonance imaging (fMRI). However, although fMRI data are often interpreted in terms of neuronal activity, the blood oxygenation level-dependent (BOLD) signal measured by fMRI includes contributions of both vascular and neuronal factors, which change differentially with age. While some studies investigate vascular ageing factors, the results of these studies are not well known within the field of neurocognitive ageing and therefore vascular confounds in neurocognitive fMRI studies are common. Despite over 10 000 BOLD-fMRI papers on ageing, fewer than 20 have applied techniques to correct for vascular effects. However, neurovascular ageing is not only a confound in fMRI, but an important feature in its own right, to be assessed alongside measures of neuronal ageing. We review current approaches to dissociate neuronal and vascular components of BOLD-fMRI of regional activity and functional connectivity. We highlight emerging evidence that vascular mechanisms in the brain do not simply control blood flow to support the metabolic needs of neurons, but form complex neurovascular interactions that influence neuronal function in health and disease. This article is part of the theme issue 'Key relationships between non-invasive functional neuroimaging and the underlying neuronal activity'.
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Affiliation(s)
- Kamen A. Tsvetanov
- Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0SZ, UK
- Department of Psychology, University of Cambridge, Cambridge CB2 3EB, UK
| | - Richard N. A. Henson
- Department of Psychiatry, University of Cambridge, Cambridge CB2 0SP, UK
- Medical Research Council Cognition and Brain Sciences Unit, University of Cambridge, Cambridge CB2 7EF, UK
| | - James B. Rowe
- Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0SZ, UK
- Medical Research Council Cognition and Brain Sciences Unit, University of Cambridge, Cambridge CB2 7EF, UK
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Groman SM. The Neurobiology of Impulsive Decision-Making and Reinforcement Learning in Nonhuman Animals. Curr Top Behav Neurosci 2020; 47:23-52. [PMID: 32157666 DOI: 10.1007/7854_2020_127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Impulsive decisions are those that favor immediate over delayed rewards, involve the acceptance of undue risk or uncertainty, or fail to adapt to environmental changes. Pathological levels of impulsive decision-making have been observed in individuals with mental illness, but there may be substantial heterogeneity in the processes that drive impulsive choices. Understanding this behavioral heterogeneity may be critical for understanding associated diverseness in the neural mechanisms that give rise to impulsivity. The application of reinforcement learning algorithms in the deconstruction of impulsive decision-making phenotypes can help bridge the gap between biology and behavior and provide insights into the biobehavioral heterogeneity of impulsive choice. This chapter will review the literature on the neurobiological mechanisms of impulsive decision-making in nonhuman animals; specifically, the role of the amine neuromodulatory systems (dopamine, serotonin, norepinephrine, and acetylcholine) in impulsive decision-making and reinforcement learning processes is discussed. Ultimately, the integration of reinforcement learning algorithms with sophisticated behavioral and neuroscience techniques may be critical for advancing the understanding of the neurochemical basis of impulsive decision-making.
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9
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Abstract
The ability to decide advantageously among options that vary in both their risks and rewards is critical for survival and well-being. Previous work shows that some forms of risky decision-making are robustly modulated by monoamine signaling, but it is less clear how monoamine signaling modulates decision-making under risk of explicit punishment. The goal of these experiments was to determine how this form of decision-making is modulated by dopamine, serotonin, and norepinephrine signaling, using a task in which rats choose between a small, 'safe' food reward and a large food reward associated with variable risks of punishment. Preference for the large, risky reward (risk-taking) was reduced by administration of a D2/3 dopamine receptor agonist (bromocriptine) and a selective D2 agonist (sumanirole). The selective D3 agonist PD128907 appeared to attenuate reward discrimination abilities but did not affect risk-taking per se. In contrast, drugs targeting serotonergic and noradrenergic signaling had few if any effects on choice behavior. These data suggest that in contrast to other forms of risky decision-making, decision-making under risk of punishment is selectively modulated by dopamine signaling, predominantly through D2 receptors.
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Cui R, Wang L, Liu L, Ruan H, Li X. Effects of noradrenergic and serotonergic systems on risk-based decision-making and center arena activity in open field in rats. Eur J Pharmacol 2018; 841:57-66. [DOI: 10.1016/j.ejphar.2018.09.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 09/19/2018] [Accepted: 09/26/2018] [Indexed: 10/28/2022]
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Barrett FS, Preller KH, Herdener M, Janata P, Vollenweider FX. Serotonin 2A Receptor Signaling Underlies LSD-induced Alteration of the Neural Response to Dynamic Changes in Music. Cereb Cortex 2018; 28:3939-3950. [PMID: 29028939 PMCID: PMC6887693 DOI: 10.1093/cercor/bhx257] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 09/06/2017] [Accepted: 09/12/2017] [Indexed: 11/12/2022] Open
Abstract
Classic psychedelic drugs (serotonin 2A, or 5HT2A, receptor agonists) have notable effects on music listening. In the current report, blood oxygen level-dependent (BOLD) signal was collected during music listening in 25 healthy adults after administration of placebo, lysergic acid diethylamide (LSD), and LSD pretreated with the 5HT2A antagonist ketanserin, to investigate the role of 5HT2A receptor signaling in the neural response to the time-varying tonal structure of music. Tonality-tracking analysis of BOLD data revealed that 5HT2A receptor signaling alters the neural response to music in brain regions supporting basic and higher-level musical and auditory processing, and areas involved in memory, emotion, and self-referential processing. This suggests a critical role of 5HT2A receptor signaling in supporting the neural tracking of dynamic tonal structure in music, as well as in supporting the associated increases in emotionality, connectedness, and meaningfulness in response to music that are commonly observed after the administration of LSD and other psychedelics. Together, these findings inform the neuropsychopharmacology of music perception and cognition, meaningful music listening experiences, and altered perception of music during psychedelic experiences.
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Affiliation(s)
- Frederick S Barrett
- Behavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 5510 Nathan Shock Dr, Baltimore, MD, USA
| | - Katrin H Preller
- Neuropsychopharmacology and Brain Imaging, Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital for Psychiatry Zurich, Lenggstr. 31, Zurich, Switzerland
| | - Marcus Herdener
- Department of Psychiatry, Psychotherapy and Psychosomatics, Center for Addictive Disorders,University Hospital for Psychiatry Zurich, Lenggstr. 31, Zurich, Switzerland
| | - Petr Janata
- Department of Psychology, University of California, Davis, 1 Shields Dr, Davis, CA, USA
- Center for Mind and Brain, University of California, Davis, 267 Cousteau Pl, Davis, CA, USA
| | - Franz X Vollenweider
- Neuropsychopharmacology and Brain Imaging, Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital for Psychiatry Zurich, Lenggstr. 31, Zurich, Switzerland
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Ishii K, Matsunaga M, Noguchi Y, Yamasue H, Ochi M, Ohtsubo Y. A polymorphism of serotonin 2A receptor (5-HT 2A R) influences delay discounting. PERSONALITY AND INDIVIDUAL DIFFERENCES 2018. [DOI: 10.1016/j.paid.2017.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bacqué-Cazenave J, Cattaert D, Delbecque JP, Fossat P. Serotonin has opposite effects on the aggressiveness of crayfish, facing either a smaller or a larger rival: alteration of size perception. J Exp Biol 2018; 221:jeb.177840. [DOI: 10.1242/jeb.177840] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/23/2018] [Indexed: 12/27/2022]
Abstract
We injected serotonin (5-HT) in adult male crayfish before pairing them with size-matched non-injected competitors, and we observed dyadic agonistic interactions. Paradoxically, 5-HT elicited opposite behavioral responses if the injected animal was opposed by a smaller or larger rival: the level of aggressiveness of the injected crayfish was higher in front of a larger rival but lower in front of a smaller rival. Our results indicate that the effects of 5-HT on aggressiveness are dependent on the perception of the relative size difference of the opponent. In both cases, however, 5-HT significantly delayed the decision to retreat. We conclude that 5-HT does not primarily act on aggressiveness but rather on the brain centers that integrate risk assessment and/or decision-making, which then modulate the aggressive response. Our study supports a reinterpretation of the role of 5-HT in crustacean agonistic behavior that may be of interest for other animals.
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Affiliation(s)
- Julien Bacqué-Cazenave
- Université de Bordeaux. CNRS, UMR5287, INCIA (Institut des Neurosciences Cognitives et Intégratives d'Aquitaine), 146 Rue Leo Saignat, 33076 Bordeaux, France
| | - Daniel Cattaert
- Université de Bordeaux. CNRS, UMR5287, INCIA (Institut des Neurosciences Cognitives et Intégratives d'Aquitaine), 146 Rue Leo Saignat, 33076 Bordeaux, France
| | - Jean Paul Delbecque
- Université de Bordeaux. CNRS, UMR5287, INCIA (Institut des Neurosciences Cognitives et Intégratives d'Aquitaine), 146 Rue Leo Saignat, 33076 Bordeaux, France
| | - Pascal Fossat
- Université de Bordeaux. CNRS, UMR5287, INCIA (Institut des Neurosciences Cognitives et Intégratives d'Aquitaine), 146 Rue Leo Saignat, 33076 Bordeaux, France
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Persons AL, Tedford SE, Napier TC. Mirtazapine and ketanserin alter preference for gambling-like schedules of reinforcement in rats. Prog Neuropsychopharmacol Biol Psychiatry 2017; 77:178-184. [PMID: 28412411 PMCID: PMC5656013 DOI: 10.1016/j.pnpbp.2017.03.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 03/15/2017] [Accepted: 03/21/2017] [Indexed: 12/15/2022]
Abstract
Drug and behavioral addictions have overlapping features, e.g., both manifest preference for larger, albeit costlier, reinforcement options in cost/benefit decision-making tasks. Our prior work revealed that the mixed-function serotonergic compound, mirtazapine, attenuates behaviors by rats motivated by abused drugs. To extend this work to behavioral addictions, here we determined if mirtazapine and/or ketanserin, another mixed-function serotonin-acting compound, can alter decision-making in rats that is independent of drug (or food)-motivated reward. Accordingly, we developed a novel variable-ratio task in rats wherein intracranial self-stimulation was used as the positive reinforcer. Using lever pressing for various levels of brain stimulation, the operant task provided choices between a small brain stimulation current delivered on a fixed-ratio schedule (i.e., a predictable reward) and a large brain stimulation delivered following an unpredictable number of responses (i.e., a variable-ratio schedule). This task allowed for demonstration of individualized preference and detection of shifts in motivational influences during a pharmacological treatment. Once baseline preference was established, we determined that pretreatment with mirtazapine or ketanserin significantly decreased preference for the large reinforcer presented after gambling-like schedules of reinforcement. When the rats were tested the next day without drug, preference for the unpredictable large reinforcer option was restored. These data demonstrate that mirtazapine and ketanserin can reduce preference for larger, costlier reinforcement options, and illustrate the potential for these drugs to alter behavior.
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Affiliation(s)
- Amanda L. Persons
- Dept. of Pharmacology, Rush University Medical Center, Chicago, IL,Dept. of Physician Assistant Studies, Rush University Medical Center, Chicago, IL,Center for Compulsive Behavior and Addiction, Rush University Medical Center, Chicago, IL
| | - Stephanie E. Tedford
- Dept. of Pharmacology, Rush University Medical Center, Chicago, IL,Center for Compulsive Behavior and Addiction, Rush University Medical Center, Chicago, IL
| | - T. Celeste Napier
- Dept. of Pharmacology, Rush University Medical Center, Chicago, IL,Dept. of Psychiatry, Rush University Medical Center, Chicago, IL,Center for Compulsive Behavior and Addiction, Rush University Medical Center, Chicago, IL
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15
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Wagels L, Votinov M, Radke S, Clemens B, Montag C, Jung S, Habel U. Blunted insula activation reflects increased risk and reward seeking as an interaction of testosterone administration and the MAOA polymorphism. Hum Brain Mapp 2017; 38:4574-4593. [PMID: 28603901 DOI: 10.1002/hbm.23685] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/22/2017] [Accepted: 05/31/2017] [Indexed: 12/26/2022] Open
Abstract
Testosterone, a male sex hormone, has been suggested to partly explain mixed findings in males and females when investigating behavioral tendencies associated with the MAOA polymorphism. Prior studies indicated that the MAOA polymorphism represents a vulnerability factor for financial risk-taking and harm avoidance and that testosterone increases human risk-taking. We therefore assumed an interactive influence of the MAOA polymorphism and testosterone application on decision making and corresponding neural correlates in a risk and reward context. Stratified for the MAOA polymorphism (S =short, L =long), 103 healthy males were assigned to a placebo or testosterone group (double blind, randomized) receiving a topical gel containing 50 mg testosterone. During a functional MRI scan, the participants performed a sequential decision making task. Our results indicate that testosterone and the MAOA polymorphism jointly influence sequential decision making. The MAOA-S variant was associated with less automatic harm avoidance as reflected in response times on safe decisions. Moreover, after testosterone administration, MAOA-S carriers were more risk-taking. Overall activity in the anterior cingulate cortex, anterior insula and inferior frontal gyrus increased with growing risk for losses. In the anterior insula, testosterone administration mitigated this effect solely in MAOA-S carriers. This might be a reflection of an improved coping during risk-reward conflicts subsequently modulating risky decision making. While the molecular basis is not well defined so far, our results support the assumption of testosterone as a modulatory factor for previously reported sex differences of behavioral associations with the MAOA-S variant. Hum Brain Mapp 38:4574-4593, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Lisa Wagels
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, Uniklinik RWTH Aachen, Aachen, Germany.,Institute of Neuroscience and Medicine 10, Research Center Jülich, Jülich, Germany.,JARA-Institute Brain Structure Function Relationship, Research Center Jülich and RWTH Aachen, Aachen, Germany
| | - Mikhail Votinov
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, Uniklinik RWTH Aachen, Aachen, Germany.,Institute of Neuroscience and Medicine 10, Research Center Jülich, Jülich, Germany
| | - Sina Radke
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, Uniklinik RWTH Aachen, Aachen, Germany.,JARA-Institute Brain Structure Function Relationship, Research Center Jülich and RWTH Aachen, Aachen, Germany
| | - Benjamin Clemens
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, Uniklinik RWTH Aachen, Aachen, Germany
| | - Christian Montag
- Institue of Psychology and Education, Ulm University, Ulm, Germany.,Key laboratory for NeuroInformation/Center for Information in Medicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Sonja Jung
- Institue of Psychology and Education, Ulm University, Ulm, Germany
| | - Ute Habel
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, Uniklinik RWTH Aachen, Aachen, Germany.,JARA-Institute Brain Structure Function Relationship, Research Center Jülich and RWTH Aachen, Aachen, Germany
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16
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Nautiyal KM, Okuda M, Hen R, Blanco C. Gambling disorder: an integrative review of animal and human studies. Ann N Y Acad Sci 2017; 1394:106-127. [PMID: 28486792 PMCID: PMC5466885 DOI: 10.1111/nyas.13356] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 03/08/2017] [Accepted: 03/22/2017] [Indexed: 11/29/2022]
Abstract
Gambling disorder (GD), previously called pathological gambling and classified as an impulse control disorder in DSM-III and DSM-IV, has recently been reclassified as an addictive disorder in the DSM-5. It is widely recognized as an important public health problem associated with substantial personal and social costs, high rates of psychiatric comorbidity, poor physical health, and elevated suicide rates. A number of risk factors have been identified, including some genetic polymorphisms. Animal models have been developed in order to study the underlying neural basis of GD. Here, we discuss recent advances in our understanding of the risk factors, disease course, and pathophysiology. A focus on a phenotype-based dissection of the disorder is included in which known neural correlates from animal and human studies are reviewed. Finally, current treatment approaches are discussed, as well as future directions for GD research.
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Affiliation(s)
- Katherine M. Nautiyal
- New York State Psychiatric Institute, New York, New York
- Department of Psychiatry, Columbia University, New York, New York
| | - Mayumi Okuda
- New York State Psychiatric Institute, New York, New York
- Department of Psychiatry, Columbia University, New York, New York
| | - Rene Hen
- New York State Psychiatric Institute, New York, New York
- Department of Psychiatry, Columbia University, New York, New York
- Departments of Neuroscience and Pharmacology, Columbia University, New York, New York
| | - Carlos Blanco
- National Institute on Drug Abuse, Rockville, Maryland
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17
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Involvement of serotonin 2A receptor activation in modulating medial prefrontal cortex and amygdala neuronal activation during novelty-exposure. Behav Brain Res 2017; 326:1-12. [PMID: 28263831 DOI: 10.1016/j.bbr.2017.02.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 02/23/2017] [Accepted: 02/28/2017] [Indexed: 12/11/2022]
Abstract
The medial prefrontal cortex (PFC) plays a major role in executive function by exerting a top-down control onto subcortical areas. Novelty-induced frontal cortex activation is 5-HT2A receptor (5-HT2AR) dependent. Here, we further investigated how blockade of 5-HT2ARs in mice exposed to a novel open-field arena affects medial PFC activation and basolateral amygdala (BLA) reactivity. We used c-Fos immunoreactivity (IR) as a marker of neuronal activation and stereological quantification for obtaining the total number of c-Fos-IR neurons as a measure of regional activation. We further examined the impact of 5-HT2AR blockade on the striatal-projecting BLA neurons. Systemic administration of ketanserin (0.5mg/kg) prior to novel open-field exposure resulted in reduced total numbers of c-Fos-IR cells in dorsomedial PFC areas and the BLA. Moreover, there was a positive correlation between the relative time spent in the centre of the open-field and BLA c-Fos-IR in the ketanserin-treated animals. Unilateral medial PFC lesions blocked this effect, ascertaining an involvement of this frontal cortex area. On the other hand, medial PFC lesioning exacerbated the more anxiogenic-like behaviour of the ketanserin-treated animals, upholding its involvement in modulating averseness. Ketanserin did not affect the number of activated striatal-projecting BLA neurons (measured by number of Cholera Toxin b (CTb) retrograde labelled neurons also being c-Fos-IR) following CTb injection in the ventral striatum. These results support a role of 5-HT2AR activation in modulating mPFC and BLA activation during exposure to a novel environment, which may be interrelated. Conversely, 5-HT2AR blockade does not seem to affect the amygdala-striatal projection.
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18
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Faulkner P, Mancinelli F, Lockwood PL, Matarin M, Dolan RJ, Wood NW, Dayan P, Roiser JP. Peripheral Serotonin 1B Receptor Transcription Predicts the Effect of Acute Tryptophan Depletion on Risky Decision-Making. Int J Neuropsychopharmacol 2016; 20:58-66. [PMID: 27638901 PMCID: PMC5480594 DOI: 10.1093/ijnp/pyw075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 08/13/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The effects of acute tryptophan depletion on human decision-making suggest that serotonin modulates the processing of rewards and punishments. However, few studies have assessed which of the many types of serotonin receptors are responsible. METHODS Using a within-subject, double-blind, sham-controlled design in 26 subjects, we examined whether individual differences in serotonin system gene transcription, measured in peripheral blood, predicted the effect of acute tryptophan depletion on decision-making. Participants performed a task in which they chose between successive pairs of fixed, lower-stakes (control) and variable, higher-stakes (experimental) gambles, each involving wins or losses. In 21 participants, mRNA from 9 serotonin system genes was measured in whole blood prior to acute tryptophan depletion: 5-HT1B, 5-HT1F, 5-HT2A, 5-HT2B, 5-HT3A, 5-HT3E, 5-HT7 (serotonin receptors), 5-HTT (the serotonin transporter), and tryptophan hydroxylase 1. RESULTS Acute tryptophan depletion did not significantly influence participants' sensitivity to probability, wins, or losses, although there was a trend for a lower tendency to choose experimental gambles overall following depletion. Significant positive correlations, which survived correction for multiple comparisons, were detected between baseline 5-HT1B mRNA levels and acute tryptophan depletion-induced increases in both the overall tendency to choose the experimental gamble and sensitivity to wins. No significant relationship was observed with any other peripheral serotonin system markers. Computational analyses of decision-making data provided results consistent with these findings. CONCLUSIONS These results suggest that the 5-HT1B receptor may modulate the effects of acute tryptophan depletion on risky decision-making. Peripheral levels of serotonin markers may predict response to treatments that act upon the serotonin system, such as selective serotonin reuptake inhibitors.
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Affiliation(s)
- Paul Faulkner
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner);,Correspondence: Paul Faulkner, PhD, Semel Institute, 760 Westwood Boulevard, University of California, Los Angeles, CA 90025 ()
| | - Federico Mancinelli
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner)
| | - Patricia L Lockwood
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner)
| | - Mar Matarin
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner)
| | - Raymond J Dolan
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner)
| | - Nick W Wood
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner)
| | - Peter Dayan
- Institute of Cognitive Neuroscience, University College London, London, United Kingdom (Drs Faulkner and Roiser); Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California (Dr Faulkner)
| | - Jonathan P Roiser
- Gatsby Computational Neuroscience Unit (Mr Mancinelli and Dr Dayan), and CoMPLEX Centre for Mathematics, Physics and Engineering in the Life Sciences and Experimental Biology (Mr Mancinelli), University College London, London, United Kingdom; Experimental Psychology, University of Oxford, Oxford, United Kingdom (Dr Lockwood); Clinical and Experimental Epilepsy, Institute of Neurology (Dr Matarin), and Wellcome Trust Centre for Neuroimaging (Dr Dolan), University College London, London, United Kingdom; Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, United Kingdom (Dr Wood)
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19
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Macoveanu J, Fisher PM, Madsen MK, Mc Mahon B, Knudsen GM, Siebner HR. Bright-light intervention induces a dose-dependent increase in striatal response to risk in healthy volunteers. Neuroimage 2016; 139:37-43. [PMID: 27318214 DOI: 10.1016/j.neuroimage.2016.06.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 02/01/2023] Open
Abstract
Bright-light interventions have successfully been used to reduce depression symptoms in patients with seasonal affective disorder, a depressive disorder most frequently occurring during seasons with reduced daylight availability. Yet, little is known about how light exposure impacts human brain function, for instance on risk taking, a process affected in depressive disorders. Here we examined the modulatory effects of bright-light exposure on brain activity during a risk-taking task. Thirty-two healthy male volunteers living in the greater Copenhagen area received 3weeks of bright-light intervention during the winter season. Adopting a double-blinded dose-response design, bright-light was applied for 30minutes continuously every morning. The individual dose varied between 100 and 11.000lx. Whole-brain functional MRI was performed before and after bright-light intervention to probe how the intervention modifies risk-taking related neural activity during a two-choice gambling task. We also assessed whether inter-individual differences in the serotonin transporter-linked polymorphic region (5-HTTLPR) genotype influenced the effects of bright-light intervention on risk processing. Bright-light intervention led to a dose-dependent increase in risk-taking in the LA/LA group relative to the non-LA/LA group. Further, bright-light intervention enhanced risk-related activity in ventral striatum and head of caudate nucleus in proportion with the individual bright-light dose. The augmentation effect of light exposure on striatal risk processing was not influenced by the 5-HTTLPR-genotype. This study provides novel evidence that in healthy non-depressive individuals bright-light intervention increases striatal processing to risk in a dose-dependent fashion. The findings provide converging evidence that risk processing is sensitive to bright-light exposure during winter.
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Affiliation(s)
- Julian Macoveanu
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark; Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Psychiatric Center Copenhagen, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
| | - Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Martin K Madsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Brenda Mc Mahon
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Psychiatric Center Copenhagen, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Gitte M Knudsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Hartwig R Siebner
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark; Department of Neurology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
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20
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Aznar S, Hervig MES. The 5-HT2A serotonin receptor in executive function: Implications for neuropsychiatric and neurodegenerative diseases. Neurosci Biobehav Rev 2016; 64:63-82. [DOI: 10.1016/j.neubiorev.2016.02.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 11/05/2015] [Accepted: 02/08/2016] [Indexed: 02/07/2023]
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21
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Lochner C, Chamberlain SR, Kidd M, Fineberg NA, Stein DJ. Altered cognitive response to serotonin challenge as a candidate endophenotype for obsessive-compulsive disorder. Psychopharmacology (Berl) 2016; 233:883-91. [PMID: 26645225 DOI: 10.1007/s00213-015-4172-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/21/2015] [Indexed: 11/26/2022]
Abstract
RATIONALE Obsessive-compulsive disorder (OCD) implicates dysfunction of orbitofrontal and insula-related circuitry and of the serotonin system. There is an on-going search in psychiatry for intermediate biological markers, termed 'endophenotypes', that exist not only in patients with a given disorder but also in their clinically unaffected first-degree relatives. OBJECTIVE Pharmacological challenge is recognized as a means of eliciting an endophenotype, but this strategy has yet to be used in OCD. METHODS Twenty-three OCD patients without comorbidities (12 [52.2 %] female), 13 clinically asymptomatic first-degree relatives of OCD patients (11 [84.6 %] female) and 27 healthy controls (16 [59.3 %] female) received single-dose escitalopram (20 mg) and placebo in a randomized double-blind crossover design. Effects of treatment on decision-making were quantified using the Cambridge Gamble Task (CGT) in conjunction with a mixed model analysis of covariance (ANCOVA). RESULTS There was a significant interaction between serotonergic challenge and group for risk adjustment on the CGT (F = 4.1406; p = 0.02). Only controls showed a significant placebo-drug change in risk adjustment (p = 0.02; versus p > 0.10). Numerically, escitalopram was associated with increase in risk adjustment in controls and reductions in the other groups. Change in risk adjustment was similar in OCD patients and relatives (p = 0.806) and differed significantly from controls (p = 0.007; p = 0.041, respectively). CONCLUSIONS Individuals with OCD, and first-degree relatives, showed an altered cognitive response to serotonin challenge. This is the first demonstration of a candidate pharmacological challenge endophenotype for the disorder. Future work should confirm these findings in a larger sample size and ideally extend them to other cognitive paradigms, utilizing functional neuroimaging.
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Affiliation(s)
- Christine Lochner
- US/UCT MRC Unit on Anxiety & Stress Disorders, Department of Psychiatry, University of Stellenbosch, PO Box 241, Cape Town, 8000, South Africa.
| | - Samuel R Chamberlain
- Department of Psychiatry, University of Cambridge School of Clinical Medicine and Cambridge and Peterborough NHS Foundation Trust (CPFT), Cambridge, UK
| | - Martin Kidd
- Centre for Statistical Consultation, Department of Statistics and Actuarial Sciences, University of Stellenbosch, Stellenbosch, South Africa
| | - Naomi A Fineberg
- Department of Psychiatry, University of Cambridge School of Clinical Medicine and Cambridge and Peterborough NHS Foundation Trust (CPFT), Cambridge, UK
- Hertfordshire Partnership University NHS Foundation Trust and University Of Hertfordshire, Hatfield, UK
| | - Dan J Stein
- US/UCT MRC Unit on Anxiety & Stress Disorders, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
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22
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Macoveanu J, Henningsson S, Pinborg A, Jensen P, Knudsen GM, Frokjaer VG, Siebner HR. Sex-Steroid Hormone Manipulation Reduces Brain Response to Reward. Neuropsychopharmacology 2016; 41:1057-65. [PMID: 26245498 PMCID: PMC4748430 DOI: 10.1038/npp.2015.236] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 07/16/2015] [Accepted: 07/27/2015] [Indexed: 11/09/2022]
Abstract
Mood disorders are twice as frequent in women than in men. Risk mechanisms for major depression include adverse responses to acute changes in sex-steroid hormone levels, eg, postpartum in women. Such adverse responses may involve an altered processing of rewards. Here, we examine how women's vulnerability for mood disorders is linked to sex-steroid dynamics by investigating the effects of a pharmacologically induced fluctuation in ovarian sex steroids on the brain response to monetary rewards. In a double-blinded placebo controlled study, healthy women were randomized to receive either placebo or the gonadotropin-releasing hormone agonist (GnRHa) goserelin, which causes a net decrease in sex-steroid levels. Fifty-eight women performed a gambling task while undergoing functional MRI at baseline, during the mid-follicular phase, and again following the intervention. The gambling task enabled us to map regional brain activity related to the magnitude of risk during choice and to monetary reward. The GnRHa intervention caused a net reduction in ovarian sex steroids (estradiol and testosterone) and increased depression symptoms. Compared with placebo, GnRHa reduced amygdala's reactivity to high monetary rewards. There was a positive association between the individual changes in testosterone and changes in bilateral insula response to monetary rewards. Our data provide evidence for the involvement of sex-steroid hormones in reward processing. A blunted amygdala response to rewarding stimuli following a rapid decline in sex-steroid hormones may reflect a reduced engagement in positive experiences. Abnormal reward processing may constitute a neurobiological mechanism by which sex-steroid fluctuations provoke mood disorders in susceptible women.
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Affiliation(s)
- Julian Macoveanu
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark,Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Psychiatric Center Copenhagen, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Kettegaard Alle 30, Hvidovre DK-2650, Denmark, Tel: +0045 3195 3196, E-mail:
| | - Susanne Henningsson
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark,Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Anja Pinborg
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Fertility Clinic, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Gynecology and Obstetrics, Copenhagen University Hospital, Hvidovre, Denmark
| | - Peter Jensen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Gitte M Knudsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Vibe G Frokjaer
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Psychiatric Center Copenhagen, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark,Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Hartwig R Siebner
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark,Department of Neurology, Copenhagen University Hospital, Copenhagen, Denmark
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23
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Knudsen GM, Jensen PS, Erritzoe D, Baaré WFC, Ettrup A, Fisher PM, Gillings N, Hansen HD, Hansen LK, Hasselbalch SG, Henningsson S, Herth MM, Holst KK, Iversen P, Kessing LV, Macoveanu J, Madsen KS, Mortensen EL, Nielsen FÅ, Paulson OB, Siebner HR, Stenbæk DS, Svarer C, Jernigan TL, Strother SC, Frokjaer VG. The Center for Integrated Molecular Brain Imaging (Cimbi) database. Neuroimage 2015; 124:1213-1219. [PMID: 25891375 DOI: 10.1016/j.neuroimage.2015.04.025] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 04/08/2015] [Accepted: 04/09/2015] [Indexed: 01/07/2023] Open
Abstract
We here describe a multimodality neuroimaging containing data from healthy volunteers and patients, acquired within the Lundbeck Foundation Center for Integrated Molecular Brain Imaging (Cimbi) in Copenhagen, Denmark. The data is of particular relevance for neurobiological research questions related to the serotonergic transmitter system with its normative data on the serotonergic subtype receptors 5-HT1A, 5-HT1B, 5-HT2A, and 5-HT4 and the 5-HT transporter (5-HTT), but can easily serve other purposes. The Cimbi database and Cimbi biobank were formally established in 2008 with the purpose to store the wealth of Cimbi-acquired data in a highly structured and standardized manner in accordance with the regulations issued by the Danish Data Protection Agency as well as to provide a quality-controlled resource for future hypothesis-generating and hypothesis-driven studies. The Cimbi database currently comprises a total of 1100 PET and 1000 structural and functional MRI scans and it holds a multitude of additional data, such as genetic and biochemical data, and scores from 17 self-reported questionnaires and from 11 neuropsychological paper/computer tests. The database associated Cimbi biobank currently contains blood and in some instances saliva samples from about 500 healthy volunteers and 300 patients with e.g., major depression, dementia, substance abuse, obesity, and impulsive aggression. Data continue to be added to the Cimbi database and biobank.
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Affiliation(s)
- Gitte M Knudsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark.
| | - Peter S Jensen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - David Erritzoe
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - William F C Baaré
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark
| | - Anders Ettrup
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - Nic Gillings
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; PET and Cyclotron Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - Hanne D Hansen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - Lars Kai Hansen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; DTU Compute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Steen G Hasselbalch
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Susanne Henningsson
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark
| | - Matthias M Herth
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; PET and Cyclotron Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Klaus K Holst
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Department of Biostatistics, University of Copenhagen, DK-1014 Copenhagen, Denmark
| | - Pernille Iversen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark
| | - Lars V Kessing
- Psychiatric Center Copenhagen, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Julian Macoveanu
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark; Psychiatric Center Copenhagen, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Kathrine Skak Madsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark
| | - Erik L Mortensen
- Department of Public Health and Center for Healthy Aging, University of Copenhagen, DK-2200 Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Finn Årup Nielsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; DTU Compute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Olaf B Paulson
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Hartwig R Siebner
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, DK-2650 Hvidovre, Denmark; Department of Neurology, Copenhagen University Hospital Bispebjerg, DK-2400 Copenhagen, Denmark; Department of Neurology, Copenhagen University Hospital Bispebjerg, DK-2400 Copenhagen, Denmark
| | - Dea S Stenbæk
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - Claus Svarer
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark
| | - Terry L Jernigan
- Center for Human Development, University of California, San Diego, La Jolla, CA 92093, USA
| | - Stephen C Strother
- Rotman Research Institute, Baycrest Centre, Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Vibe G Frokjaer
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, DK-2100 Copenhagen, Denmark; Psychiatric Center Copenhagen, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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Ishii H, Ohara S, Tobler PN, Tsutsui KI, Iijima T. Dopaminergic and serotonergic modulation of anterior insular and orbitofrontal cortex function in risky decision making. Neurosci Res 2015; 92:53-61. [DOI: 10.1016/j.neures.2014.11.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/15/2014] [Accepted: 11/26/2014] [Indexed: 11/28/2022]
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Minkov M, Blagoev V, Bond MH. Improving Research in the Emerging Field of Cross-Cultural Sociogenetics. JOURNAL OF CROSS-CULTURAL PSYCHOLOGY 2014. [DOI: 10.1177/0022022114563612] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We offer a critical overview of studies associating genetic differences in the 5-HTTLPR VNTR in the serotonin-transporter gene with societal differences. We also highlight recent findings from individual-level research on 5-HTTLPR generating new hypotheses concerning the effect of genes on culture. We provide an expanded national index reflecting 5-HTTLPR S-allele prevalence as an improved tool for future research. Our preliminary tests of this tool suggest that national S-allele prevalence is not associated with individualism as has been claimed, but with national neuroticism, IQ and school achievement, Hofstede’s fifth dimension of long-term orientation, and Minkov’s societal hypometropia—a measure of risk acceptance and short-term vision in life history strategy. We encourage detailed research of these associations in future studies.
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Macoveanu J, Fisher PM, Haahr ME, Frokjaer VG, Knudsen GM, Siebner HR. Effects of selective serotonin reuptake inhibition on neural activity related to risky decisions and monetary rewards in healthy males. Neuroimage 2014; 99:434-42. [PMID: 24857827 DOI: 10.1016/j.neuroimage.2014.05.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 05/15/2014] [Indexed: 12/16/2022] Open
Abstract
Selective serotonin reuptake inhibitors (SSRIs) such as fluoxetine are commonly prescribed antidepressant drugs targeting the dysfunctional serotonin (5-HT) system, yet little is known about the functional effects of prolonged serotonin reuptake inhibition in healthy individuals. Here we used functional MRI (fMRI) to investigate how a three-week fluoxetine intervention influences neural activity related to risk taking and reward processing. Employing a double-blinded parallel-group design, 29 healthy young males were randomly assigned to receive 3 weeks of a daily dose of 40 mg fluoxetine or placebo. Participants underwent task-related fMRI prior to and after the three-week intervention while performing a card gambling task. The task required participants to choose between two decks of cards. Choices were associated with different risk levels and potential reward magnitudes. Relative to placebo, the SSRI intervention did not alter individual risk-choice preferences, but modified neural activity during decision-making and reward processing: During the choice phase, SSRI reduced the neural response to increasing risk in lateral orbitofrontal cortex, a key structure for value-based decision-making. During the outcome phase, a midbrain region showed an independent decrease in the responsiveness to rewarding outcomes. This midbrain cluster included the raphe nuclei from which serotonergic modulatory projections originate to both cortical and subcortical regions. The findings corroborate the involvement of the normally functioning 5HT-system in decision-making under risk and processing of monetary rewards. The data suggest that prolonged SSRI treatment might reduce emotional engagement by reducing the impact of risk during decision-making or the impact of reward during outcome evaluation.
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Affiliation(s)
- Julian Macoveanu
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark; Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark.
| | - Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Mette E Haahr
- Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Vibe G Frokjaer
- Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Gitte M Knudsen
- Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Hartwig R Siebner
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark; Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark
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27
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Klein A, Ultved L, Adamsen D, Santini M, Tobeña A, Fernandez-Teruel A, Flores P, Moreno M, Cardona D, Knudsen G, Aznar S, Mikkelsen J. 5-HT2A and mGlu2 receptor binding levels are related to differences in impulsive behavior in the Roman Low- (RLA) and High- (RHA) avoidance rat strains. Neuroscience 2014; 263:36-45. [DOI: 10.1016/j.neuroscience.2013.12.063] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 12/26/2013] [Accepted: 12/27/2013] [Indexed: 10/25/2022]
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28
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Serotonergic modulation of reward and punishment: Evidence from pharmacological fMRI studies. Brain Res 2014; 1556:19-27. [DOI: 10.1016/j.brainres.2014.02.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/16/2014] [Accepted: 02/01/2014] [Indexed: 01/23/2023]
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Faulkner P, Selvaraj S, Pine A, Howes OD, Roiser JP. The relationship between reward and punishment processing and the 5-HT1A receptor as shown by PET. Psychopharmacology (Berl) 2014; 231:2579-86. [PMID: 24429872 PMCID: PMC4057624 DOI: 10.1007/s00213-013-3426-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 12/20/2013] [Indexed: 11/24/2022]
Abstract
RATIONALE The serotonin (5-HT) system has been reported to be involved in decision-making. A key component of this neurotransmitter system is the 5-HT1A receptor, and research is beginning to show how this receptor can influence decision-making. However, this relationship has rarely been studied in humans. OBJECTIVES This study assessed whether individual variability in 5-HT1A availability correlates with decision-making in healthy volunteers. METHODS We measured regional availability of the 5-HT1A receptor in the hippocampal complex and striatum using positron emission tomography and correlated this with performance on two decision-making tasks measuring sensitivity to probability, rewards and punishments and temporal discounting, respectively. RESULTS No relationship between decision-making behaviour and 5-HT1A availability in the striatum was found. However, a positive correlation was detected between participants' 5-HT1A availability in the hippocampal complex and their sensitivity to the probability of winning. Furthermore, there was a negative correlation between the degree to which participants discounted future rewards and 5-HT1A availability in the hippocampal complex. CONCLUSIONS These data support a role for the 5-HT1A receptor in the aberrant decision-making that can occur in neuropsychiatric disorders such as depression.
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Affiliation(s)
- Paul Faulkner
- Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London, WC1N 3AR, UK,
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