Cited by 61Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchSchizophrenia research and treatment

Rapamycin attenuates the expression of cocaine‐induced place preference and behavioral sensitization

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Bailey, Jeffrey, Ma, Dzwokai, Szumlinski, Karen K.·2012·Addiction Biology

Abstract

The mammalian target of rapamycin (mTOR) is a serine‐threonine kinase that controls global protein synthesis, in part, by modulating translation initiation, a rate‐limiting step for many mRNAs. Previous studies implicate mTOR in regulating stimulant‐induced sensitization and antidepressive‐like behavior in rodents, as well as drug craving in abstinent heroin addicts. To determine if signaling downstream of mTOR is affected by repeated cocaine administration in reward‐associated brain regions, and if inhibition of mTOR alters cocaine‐induced behavioral plasticity, C57BL/6J mice received four intraperitoneal (i.p.) injections of 15 mg/kg cocaine and levels of phosphorylated P70S6 kinase and ribosomal S6 protein—two translational regulators directly downstream of mTOR—were analyzed by immunoblotting across several brain regions. Cocaine place preference and locomotor sensitization were elicited by four pairings of cocaine with a distinct environment and the effects of mTOR inhibition were assessed by pre‐treating the mice with 10 mg/kg rapamycin, 1 hour prior to: (1) each saline/cocaine conditioning session; (2) a post‐conditioning test; or (3) a test for locomotor sensitization conducted at 3 weeks withdrawal. While systemic pre‐treatment with 10 mg/kg rapamycin during conditioning failed to alter the development of a cocaine place preference or locomotor sensitization, pre‐treatment prior to the post‐conditioning test attenuated the expression of the place preference. Additionally, rapamycin pre‐treatment prior to a cocaine challenge 3 weeks post‐conditioning blocked the expression of the sensitized locomotor response. These findings suggest a role for mTOR activity, and perhaps translational control, in the expression of cocaine‐induced place preference and locomotor sensitization.

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  • mTORC1 contributes to memory processes involved in cocaine-conditioned place preference and cue-induced reinstatement.

    “Interestingly, mTORC1 is reported to contribute to memory processes involved in cocaine-conditioned place preference and cue-induced reinstatement14, 15”

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Authors
Bailey, J., Ma, D., & Szumlinski, K. K.
Affiliations
University of California System (US)
Corresponding author
Szumlinski, Karen K.
Venue
Addiction Biology
Publisher
Wiley
Published
2011-03-11
Volume
17
Issue
2
Pages
248-258
ISSN
  • 1355-6215 (ISSN-L)
  • 1369-1600
OpenAlex
W2139810677
Cited by
61
References
47
Citations by year
2026: 1 · 2025: 5 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 4 · 2020: 4 · 2019: 6 · 2018: 11 · 2017: 2 · 2016: 6 · 2015: 7 · 2014: 5 · 2013: 4 · 2012: 1
FWCI
1.32
Type
journal article
Language
en
Open access
Locations
  • Addiction Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Alliance for Research on Schizophrenia and Depression
  • National Institute on Drug Abuse (R01DA024038)
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
rapamycin, mTOR signaling, cocaine, place preference, locomotor sensitization, p70 S6 kinase, ribosomal protein S6, translational regulation, drug reward, behavioral plasticity, cocaine withdrawal
MeSH terms
Animals, Behavior, Animal, Brain, Cocaine, Conditioning, Operant, Drug Interactions, Male, Mice, Inbred C57BL, Motor Activity, Reinforcement, Psychology, Immunoblotting, Signal Transduction, Sirolimus, Ribosomal Protein S6 Kinases, 70-kDa, Mice, TOR Serine-Threonine Kinases

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