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Psychopharmacology

, Volume 225, Issue 3, pp 719–731 | Cite as

Simultaneous blockade of dopamine and noradrenaline reuptake promotes disadvantageous decision making in a rat gambling task

  • Petra J. J. Baarendse
  • Catharine A. Winstanley
  • Louk J. M. J. Vanderschuren
Original Investigation

Abstract

Rationale

The inability to make profitable long-term decisions has been implicated in several psychiatric disorders. There is emerging evidence to support a role for dopamine (DA) in decision making, but our understanding of the role of noradrenaline (NA) and serotonin (5-HT) in decision making, and of possible interactions between the three monoamines, is limited. Moreover, impulsivity has been associated with aberrant decision making, but the underlying mechanisms are incompletely understood.

Objective

The purpose of this study is to improve our understanding of the neuropharmacological mechanisms of decision making and impulse control.

Methods

We investigated the effects of amphetamine (0.25–1.0 mg/kg) and selective reuptake inhibitors of DA (GBR12909; 2.5–10 mg/kg), NA (atomoxetine; 0.3–3.0 mg/kg), and 5-HT (citalopram; 0.3–3.0 mg/kg) in a rat gambling task (rGT). Since the rGT allows for detection of impulsive action, i.e., premature responding, we also assessed the relationship between decision making and impulsivity.

Results

In the rGT, rats developed an optimal choice strategy from the first session onwards. Elevation of endogenous DA or NA levels increased and decreased impulsivity, respectively, but did not alter decision making. However, simultaneous blockade of DA and NA disrupted decision making, reflected by a relative decrease in choice for the advantageous choice options. Increasing 5-HT neurotransmission did not affect decision making or impulsivity.

Conclusions

These data suggest important but complementary or redundant roles of DA and NA neurotransmission in decision-making processes based on reward probability and punishment. Moreover, impulse control and decision making in the rGT rely on dissociable mechanisms.

Keywords

Decision making Impulsivity Dopamine Serotonin Noradrenaline Rat gambling task 

Notes

Acknowledgments

This study was supported by the National Institute on Drug Abuse Grant R01 DA022628 (L.J.M.J.V.).

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Petra J. J. Baarendse
    • 1
  • Catharine A. Winstanley
    • 3
  • Louk J. M. J. Vanderschuren
    • 1
    • 2
  1. 1.Department of Neuroscience and Pharmacology, Rudolf Magnus Institute of NeuroscienceUniversity Medical Center UtrechtUtrechtThe Netherlands
  2. 2.Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary MedicineUtrecht UniversityUtrechtThe Netherlands
  3. 3.Department of PsychologyUniversity of British ColumbiaVancouverCanada

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