Cited by 30Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchSchizophrenia research and treatment

Reversal of cocaine sensitization-induced behavioral sensitization normalizes GAD67 and GABAA receptor α2 subunit expression, and PKC ζ activity

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Chen, Qiang, Lee, Tong H., Wetsel, William C., Sun, Qi-An, Liu, Yingmiao, Davidson, Colin, Xiong, Xueying, Ellinwood, Everett H. +1 more·2007·Biochemical and Biophysical Research Communications

Abstract

We have recently shown in rats that cocaine-induced behavioral sensitization can be reversed by a 5-day treatment with ondansetron given 3.5 h after daily pergolide injections. In this study we further investigated the molecular/neurochemical alterations underlying cocaine sensitization and pergolide/ondansetron-mediated reversal. Results revealed that glutamic acid decarboxylase (GAD(65)/GAD(67)) is higher abundant in the nucleus accumbens (NAc) than that in the caudate and medial prefrontal cortex (mPFC), while GABA(A) receptor alpha2 subunit level in the NAc shell is less abundant than that in the NAc core, mPFC and caudate. Cocaine sensitization led to (1) a decrease in GAD(67) expression, an increase in total protein kinase C (PKC) zeta subtype and phosphorylated PKC zeta/lambda levels in the NAc core; (2) a decrease in GAD(67) and GABA(A) receptor alpha2 subunit expression, and an increase in phosphorylated PKC zeta/lambda levels in the NAc shell; (3) an increase in GAD(67) expression in the caudate. Importantly, pergolide/ondansetron treatment reversed these alterations. These results suggest that reversal of cocaine-induced behavioral sensitization is associated with reversal of region-specific changes in GABA function and PKC activity in the striatum.

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Crossref · 10.1016/j.bbrc.2007.03.041

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  • A reduction in NAc α2GABAARs accompanies cocaine sensitization through long-term administration.

    “A reduction in NAc α2GABAARs accompanies cocaine sensitization through long-term administration [120], while there is some evidence that these same receptors are required for the development of behavioral sensitization to cocaine in the first place [99,121], which may explain both initial sensitization and later acceleration of intake.”

    From An emerging circuit pharmacology of GABAA receptors (2018) · cites this paper as [120]

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Authors
Chen, Q., Lee, T. H., Wetsel, W. C., Sun, Q.-A., Liu, Y., Davidson, C., Xiong, X., Ellinwood, E. H., & Zhang, X.
Affiliations
  • Duke University (US)
  • Duke Medical Center (US)
Corresponding author
Zhang, Xiuwu
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2007-05
Volume
356
Issue
3
Pages
733-738
ISSN
0006-291X (ISSN-L)
OpenAlex
W2088117526
Cited by
30
References
31
Citations by year
2023: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 2 · 2016: 4 · 2015: 1 · 2014: 1 · 2013: 2 · 2012: 4
FWCI
1.33
Type
journal article
Language
en
Open access
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Drug Abuse (R21DA021185, R01DA012768, DA-10327, DA14323, R01DA010327, R01DA014323)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Keywords
cocaine sensitization, GAD67, glutamic acid decarboxylase, protein kinase C zeta, nucleus accumbens, caudate nucleus, medial prefrontal cortex, ondansetron, pergolide, GABAergic function, striatum
MeSH terms
Protein Kinase C zeta, Protein Kinase C-lambda, Animals, Behavior, Animal, Caudate Nucleus, Cocaine, Glutamate Decarboxylase, Isoenzymes, Male, Nucleus Accumbens, Pergolide, Protein Kinase C, Receptors, GABA-A, Stereotyped Behavior, Rats, Sprague-Dawley, Ondansetron, Prefrontal Cortex, Rats

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