Linked Life Data

15710239

Source:http://linkedlifedata.com/resource/pubmed/id/15710239

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2005-2-15
pubmed:abstractText
Behavioral sensitization is a characteristic sequelae of repeated cocaine exposure. It likely occurs due to long-lasting neuroadaptations produced by cocaine, although the exact nature of these adaptations has yet to be defined. The goal of the present study was to determine if behavioral sensitization to cocaine is accompanied by alterations in G-protein levels. Adult male rats were administered cocaine or saline three times daily in a binge-pattern for 1, 3, or 14 days and activity monitored. Levels of four major G-protein alpha-subunits, Galphas, Galphaolf, Galphao and Galphai1, and their mRNAs were measured in the nucleus accumbens, caudate putamen, and cingulate/frontal cortex using Western blot analysis and in situ hybridization, respectively. Fourteen days of binge-pattern cocaine administration resulted in behavioral sensitization as evidenced by increased behavioral activity over the 14 days of drug exposure. Results demonstrated that Galphaolf mRNA expression was significantly reduced in the nucleus accumbens after 1, 3 or 14 days of cocaine, whereas Galphai1 mRNA was increased following 3, but not 1 or 14 days of cocaine in the caudate putamen, nucleus accumbens and cingulate cortex. Galphas and Galphao mRNA expression were not altered in any region investigated at any time point. In contrast to gene expression, protein levels of the four G-protein alpha-subunits were not significantly different from saline-injected rats in the caudate putamen, nucleus accumbens, or frontal cortex following 1, 3, or 14 days of cocaine administration. These results suggest that alterations in the level of G-proteins are not necessary for the development of cocaine-induced sensitization.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0169-328X
pubmed:author
pubmed:issnType
Print
pubmed:day
18
pubmed:volume
133
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
224-32
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:15710239-Anesthetics, Local, pubmed-meshheading:15710239-Animals, pubmed-meshheading:15710239-Autoradiography, pubmed-meshheading:15710239-Behavior, Animal, pubmed-meshheading:15710239-Blotting, Western, pubmed-meshheading:15710239-Cocaine, pubmed-meshheading:15710239-Drug Administration Schedule, pubmed-meshheading:15710239-Gene Expression Regulation, pubmed-meshheading:15710239-Heterotrimeric GTP-Binding Proteins, pubmed-meshheading:15710239-Male, pubmed-meshheading:15710239-Motor Activity, pubmed-meshheading:15710239-Naphthalenes, pubmed-meshheading:15710239-Oxepins, pubmed-meshheading:15710239-RNA, Messenger, pubmed-meshheading:15710239-Rats, pubmed-meshheading:15710239-Rats, Inbred F344, pubmed-meshheading:15710239-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:15710239-Time Factors
pubmed:year
2005
pubmed:articleTitle
Behavioral sensitization to binge-pattern cocaine administration is not associated with changes in protein levels of four major G-proteins.
pubmed:affiliation
Temple University School of Medicine, Department of Pharmacology and Center for Substance Abuse Research, 3420 N. Broad St., MRB 319, Philadelphia, PA 19140, United States. perrines@temple.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.