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Provisional data - has not been fully curated and is subject to change.
Description: Chronic cocaine - Cocaine-paired (conditioned place preference) vs. Control (saline or cocaine-non-paired) DNA microarray All genes on microarray presented After the pre-conditioning phase where animals were allowed access to either compartment for 15 minutes for 4 consecutive days, the conditioning phase for the cocaine-paired groups and cocaine non-paired groups began, consisting of eight subsequent daily sessions. For both groups, cocaine (10 mg / kg) or saline injections were administered on alternate days. For the cocaine-paired groups, rats were immediately placed in one of the two compartments for 30 min with the door in place restricting a z transformation followed by z test and anova followed by Student-Newman-Keuls' post hoc test. Gene expression profile was assessed 24 h after the last conditioning session that corresponded to 48 h after last cocaine exposure, when drug has been eliminated from the body and transient transcriptional changes are likely to be minimal. Therefore, changes in gene expression at this time-point are likely to reflect longer lasting adaptations that may account for maintenance of cocaine-induced memories. The complete lists of the normalized gene expression values for the hippocampus of saline-treated, cocaine non-paired and cocaine-paired groups are presented. Analyses revealed that 214 transcripts were differentially regulated in the hippocampus of cocaine-paired rats vs. non-paired and saline-treated controls. Cocaine-induced conditioned place preference caused significant increases in the expression of 151 genes and caused decreases in the expression of 63 genes. (NIF Table ID 130.2 [84])
Uploaded: 03 Nov 2010
Species: Rattus norvegicus
Attribution: 7
Authors: Krasnova IN, Li SM, Wood WH, McCoy MT, Prabhu VV, Becker KG, Katz JL, Cadet JL
Title: Transcriptional responses to reinforcing effects of cocaine in the rat hippocampus and cortex.
Journal: Genes, brain, and behavior Mar 2008 , Vol 7 , pp. 193-202
Abstract: The psychostimulant effects of cocaine are thought to result from its ability to block dopamine (DA) uptake and increase DA levels in ventral striatum. In addition, cocaine causes biochemical changes in the brain areas involved in learning and memory, including hippocampus and cortex, whose role in drug reinforcement is now being actively investigated. Thus, we studied molecular events in the hippocampus and frontal cortex of rats treated with cocaine conditioned place preference (CPP) paradigm. After exposure to cocaine conditioning (cocaine paired), cocaine alone (cocaine non-paired) or saline rats were tested for place conditioning. Cocaine (10 mg/kg) caused increases in time spent in the drug-paired compartment. By using microarray analyses, we examined gene expression in the hippocampi and frontal cortices of cocaine-paired rats, cocaine non-paired and saline-treated controls. Our study revealed that 214 transcripts were differentially regulated in the hippocampi of cocaine-paired rats. These include genes that play roles in protein phosphorylation, RNA processing and protein synthesis, ubiquitin-dependent protein degradation and cytoskeleton organization. In contrast, 39 genes were differently expressed in the frontal cortex. Our data support the possibility that molecular changes in the hippocampus might participate in the formation and maintenance of memory patterns induced by cocaine in the brain. Differences in the transcriptional responses in the hippocampus and cortex suggest the primary importance of the hippocampus for recent memory processing associated with cocaine-induced CPP.   PUBMED: 17640290
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Ontological Associations:
  • D020411: Oligonucleotide Array Sequence Analysis (PubMed MeSH Annotations; Description, NCBO Annotator)
  • D003042: Cocaine (PubMed MeSH Annotations; Description, NCBO Annotator; Publication, NCBO Annotator)
  • D051381: Rats (PubMed MeSH Annotations; Description, NCBO Annotator; Publication, NCBO Annotator)
  • D003213: Conditioning (Psychology) (PubMed MeSH Annotations; Description, NCBO Annotator; Publication, NCBO Annotator)
  • D006624: Hippocampus (PubMed MeSH Annotations; Description, NCBO Annotator; Publication, NCBO Annotator)
  • D006799: Housing, Animal (PubMed MeSH Annotations)
  • D002540: Cerebral Cortex (PubMed MeSH Annotations)
  • D017208: Rats, Wistar (PubMed MeSH Annotations)
  • D000818: Animals (PubMed MeSH Annotations; Description, NCBO Annotator)
  • D020869: Gene Expression Profiling (Description, NCBO Annotator)
  • D007267: Injections (Description, NCBO Annotator)
  • D003953: Diagnosis-Related Groups (Description, NCBO Annotator)
  • MA:0000191: hippocampus (Description, NCBO Annotator; Publication, NCBO Annotator)
  • GO:0010467: gene expression (Description, NCBO Annotator; Publication, NCBO Annotator)
  • D001921: Brain (Publication, NCBO Annotator)
  • D010766: Phosphorylation (Publication, NCBO Annotator)
  • D004298: Dopamine (Publication, NCBO Annotator)
  • D012380: Role (Publication, NCBO Annotator)
  • D013995: Time (Publication, NCBO Annotator)
  • D007858: Learning (Publication, NCBO Annotator)
  • D001479: Basal Ganglia (Publication, NCBO Annotator)
  • MA:0000891: striatum (Publication, NCBO Annotator)
  • MA:0000168: brain (Publication, NCBO Annotator)
  • GO:0009058: biosynthetic process (Publication, NCBO Annotator)
  • GO:0030163: protein catabolic process (Publication, NCBO Annotator)
  • D020133: Reverse Transcriptase Polymerase Chain Reaction (PubMed MeSH Annotations)
  • D012313: RNA (PubMed MeSH Annotations; Publication, NCBO Annotator)
  • D012054: Reinforcement (Psychology) (PubMed MeSH Annotations; Publication, NCBO Annotator)
  • D004247: DNA (Description, NCBO Annotator)
  • D008283: Maintenance (Description, NCBO Annotator; Publication, NCBO Annotator)
  • MA:0002972: ventral striatum (Publication, NCBO Annotator)
  • GO:0006511: ubiquitin-dependent protein catabolic process (Publication, NCBO Annotator)
  • GO:0005856: cytoskeleton (Publication, NCBO Annotator)
  • GO:0006468: protein amino acid phosphorylation (Publication, NCBO Annotator)
  • GO:0007010: cytoskeleton organization (Publication, NCBO Annotator)
  • GO:0007612: learning (Publication, NCBO Annotator)
  • D001076: Aptitude (Publication, NCBO Annotator)
  • D010988: Play and Playthings (Publication, NCBO Annotator)
  • D009938: Organizations (Publication, NCBO Annotator)
  • MA:0000905: frontal cortex (Publication, NCBO Annotator)
  • GO:0016310: phosphorylation (Publication, NCBO Annotator)
  • GO:0007613: memory (Publication, NCBO Annotator)
  • GO:0006412: translation (Publication, NCBO Annotator)
  • D014158: Transcription, Genetic (PubMed MeSH Annotations)
  • D014171: Transients and Migrants (Description, NCBO Annotator)
  • D000704: Analysis of Variance (Description, NCBO Annotator)
  • D008568: Memory (Publication, NCBO Annotator)
  • D003599: Cytoskeleton (Publication, NCBO Annotator)
  • GO:0009056: catabolic process (Publication, NCBO Annotator)
  • GO:0006396: RNA processing (Publication, NCBO Annotator)

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