Cited by 28Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesNeuroscience and Neuropharmacology Research

Role of serotonin transporter function in rat orbitofrontal cortex in impulsive choice

Open access
Darna, Mahesh, Chow, Jonathan J., Yates, Justin R., Charnigo, Richard J., Beckmann, Joshua S., Bardo, Michael T., Dwoskin, Linda P.·2015·Behavioural Brain Research

Abstract

Impulsivity is a multi-faceted personality construct that plays a prominent role in drug abuse vulnerability. Dysregulation of 5-hydroxytryptamine (serotonin, 5-HT) systems in subregions of the prefrontal cortex has been implicated in impulsivity. Extracellular 5-HT concentrations are regulated by 5-HT transporters (SERTs), indicating that these transporters may be important molecular targets underlying individual differences in impulsivity and drug abuse vulnerability. The present study evaluated the role of SERT in mediating individual differences in impulsivity. Rats were tested for both impulsive action using the cued go/no-go task and for impulsive choice using a delay discounting task in a counterbalanced design. Following behavioral evaluation, Km and Vmax were obtained from kinetic analysis of [(3)H]5-HT uptake by SERT using synaptosomes prepared from both orbitofrontal cortex (OFC) and medial prefrontal cortex (mPFC) obtained from each individual rat. Vmax for SERT in OFC, but not mPFC, was negatively correlated with mean adjusted delay scores in the delay discounting task. In contrast, Vmax for SERT in OFC and mPFC was not correlated with performance in the cued go/no-go task. To further evaluate the relationship between SERT function and impulsive choice, a selective SERT inhibitor, fluoxetine (0, 15, 50 and 150pmol/side) was microinjected bilaterally into OFC and effects on the delay discounting task determined. Following stabilization of behavior, fluoxetine increased mean adjusted delay scores (decreased impulsivity) in high impulsive rats compared to saline microinjection, but had no effect in low impulsive rats. These ex vivo and in vivo results suggest that enhanced SERT function in OFC underlies high impulsive choice behavior.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.bbr.2015.07.025

Cites

67 of 67 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • SSRIs within the PFC directly affect animals already exhibiting a deficit but do not enhance response inhibition in normal animals.

    “Microinjections of fluoxetine into the OFC increase response inhibition in rats already showing impulsive tendencies, but have no effect in low impulsivity rats. This finding indicates direct effects of SSRIs within the PFC of animals already exhibiting a deficit, but do not enhance response inhibition in normal animals (Darna et al 2015).”

    From Prefrontal cortex executive processes affected by stress in health and disease (2018) · cites this paper as Darna et al 2015

  • Microinjections of fluoxetine into the OFC increase response inhibition in rats already showing impulsive tendencies.

    “Microinjections of fluoxetine into the OFC increase response inhibition in rats already showing impulsive tendencies, but have no effect in low impulsivity rats. This finding indicates direct effects of SSRIs within the PFC of animals already exhibiting a deficit, but do not enhance response inhibition in normal animals (Darna et al 2015).”

    From Prefrontal cortex executive processes affected by stress in health and disease (2018) · cites this paper as Darna et al 2015

  • Fluoxetine has no effect on response inhibition in low-impulsivity rats.

    “Microinjections of fluoxetine into the OFC increase response inhibition in rats already showing impulsive tendencies, but have no effect in low impulsivity rats. This finding indicates direct effects of SSRIs within the PFC of animals already exhibiting a deficit, but do not enhance response inhibition in normal animals (Darna et al 2015).”

    From Prefrontal cortex executive processes affected by stress in health and disease (2018) · cites this paper as Darna et al 2015

  • VNS may increase 5-HT and norepinephrine levels, leading to increased NMDA-R function in the mPFC and beneficial effects on response inhibition.

    “which may increase levels of 5-HT and norepinephrine leading to increased NMDA-R function within the mPFC, and subsequent beneficial effects on response inhibition measures (Carli et al 2011, Carli & Invernizzi 2014, Darna et al 2015, Mirjana et al 2004).”

    From Prefrontal cortex executive processes affected by stress in health and disease (2018) · cites this paper as Darna et al 2015

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Darna, M., Chow, J. J., Yates, J. R., Charnigo, R. J., Beckmann, J. S., Bardo, M. T., & Dwoskin, L. P.
Affiliations
University of Kentucky (US)
Corresponding author
Dwoskin, Linda P.
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2015-10
Volume
293
Pages
134-142
ISSN
0166-4328 (ISSN-L)
OpenAlex
W1152482960
Cited by
28
References
66
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 1 · 2022: 4 · 2021: 1 · 2020: 1 · 2019: 5 · 2018: 2 · 2017: 5 · 2016: 4 · 2015: 1
FWCI
1.84
Type
journal article
Language
en
Open access
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UKnowledge (University of Kentucky) (submittedVersion)
Funders
  • National Institutes of Health (UL1TR000117)
  • National Institute on Drug Abuse (T32DA016176, P50DA005312)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
serotonin transporter, impulsivity, impulsive choice, delay discounting, orbitofrontal cortex, medial prefrontal cortex, individual differences, fluoxetine, serotonin, drug abuse vulnerability
MeSH terms
Animals, Choice Behavior, Cues, Dose-Response Relationship, Drug, Fluoxetine, Impulsive Behavior, Functional Laterality, Male, Serotonin, Tritium, Rats, Sprague-Dawley, Prefrontal Cortex, Serotonin Plasma Membrane Transport Proteins, Rats

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review