Cited by 37Attention Deficit Hyperactivity DisorderNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

Adolescence methylphenidate treatment in a rodent model of attention deficit/hyperactivity disorder: dopamine transporter function and cellular distribution in adulthood

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Somkuwar, Sucharita S., Darna, Mahesh, Kantak, Kathleen M., Dwoskin, Linda P.·2013·Biochemical Pharmacology

Abstract

Attention deficit/hyperactivity disorder (ADHD) is attributed to dysfunction of the prefrontal cortex. Methylphenidate, an inhibitor of dopamine and norepinephrine transporters (DAT and NET, respectively), is a standard treatment for ADHD. The Spontaneously Hypertensive Rat (SHR) is a well-established animal model of ADHD. Our previous results showed that methylphenidate treatment in adolescent SHR enhanced cocaine self-administration during adulthood, and alterations in DAT function in prefrontal cortex play a role in this response. Importantly, prefrontal cortex subregions, orbitofrontal cortex (OFC) and medial prefrontal cortex (mPFC), have been shown to have distinct roles in ADHD and cocaine self-administration. In the current study, SHR, Wistar-Kyoto (WKY) and Wistar (WIS) rats received a therapeutically relevant dose of methylphenidate (1.5mg/kg, p.o.) or vehicle during adolescence and then OFC and mPFC DAT function and cellular expression were assessed during adulthood. In both OFC and mPFC, no strain differences in Vmax or Km for dopamine uptake into synaptosomes were found between vehicle-treated SHR, WKY and WIS. Methylphenidate increased DAT Vmax in SHR mPFC and decreased DAT Vmax in WKY OFC. Also, methylphenidate decreased DAT Km in WIS OFC. Further, methylphenidate did not alter DAT cellular localization, indicating that methylphenidate treatment during adolescence regulated DAT function in SHR mPFC in a trafficking-independent manner. Thus, the increase in mPFC DAT function was an SHR-specific long term consequence of methylphenidate treatment during adolescence, which may be responsible for the treatment-induced alterations in behavior including the observed increases in cocaine self-administration.

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Crossref · 10.1016/j.bcp.2013.04.013

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Authors
Somkuwar, S. S., Darna, M., Kantak, K. M., & Dwoskin, L. P.
Affiliations
  • University of Kentucky (US)
  • Boston University (US)
Corresponding author
Dwoskin, Linda P.
Venue
Biochemical Pharmacology
Publisher
Elsevier BV
Published
2013-07
Volume
86
Issue
2
Pages
309-316
ISSN
0006-2952 (ISSN-L)
OpenAlex
W2077398583
Cited by
37
References
83
Citations by year
2026: 1 · 2025: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2019: 1 · 2018: 6 · 2017: 5 · 2016: 3 · 2015: 11 · 2014: 4 · 2013: 1
FWCI
4.50
Type
journal article
Language
en
Open access
Locations
  • Biochemical Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute on Drug Abuse (R01DA011716)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
attention deficit hyperactivity disorder, methylphenidate, dopamine transporter, spontaneously hypertensive rats, adolescent treatment, prefrontal cortex, medial prefrontal cortex, orbitofrontal cortex, dopamine uptake, cocaine self-administration, transporter trafficking, strain differences
MeSH terms
Central Nervous System Stimulants, Animals, Attention Deficit Disorder with Hyperactivity, Disease Models, Animal, Male, Methylphenidate, Rats, Inbred SHR, Rats, Inbred WKY, Dopamine Plasma Membrane Transport Proteins, Rats

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