Differential effects of ethanol in the nucleus accumbens shell of alcohol-preferring (P), alcohol-non-preferring (NP) and Wistar rats: A proteomics study

William J. McBride, Jonathan A. Schultz, Mark W. Kimpel, Jeanette N. McClintick, Mu Wang, Jinsam You, Zachary A. Rodd

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

The objective of this study was to determine the effects of ethanol injections on protein expression in the nucleus accumbens shell (ACB-sh) of alcohol-preferring (P), alcohol-non-preferring (NP) and Wistar (W) rats. Rats were injected for 5 consecutive days with either saline or 1 g/kg ethanol; 24 h after the last injection, rats were killed and brains obtained. Micro-punch samples of the ACB-sh were homogenized; extracted proteins were subjected to trypsin digestion and analyzed with a liquid chromatography-mass spectrometer procedure. Ethanol changed expression levels (1.15-fold or higher) of 128 proteins in NP rats, 22 proteins in P, and 28 proteins in W rats. Few of the changes observed with ethanol treatment for NP rats were observed for P and W rats. Many of the changes occurred in calcium-calmodulin signaling systems, G-protein signaling systems, synaptic structure and histones. Approximately half the changes observed in the ACB-sh of P rats were also observed for W rats. Overall, the results indicate a unique response to ethanol of the ACB-sh of NP rats compared to P and W rats; this unique response may reflect changes in neuronal function in the ACB-sh that could contribute to the low alcohol drinking behavior of the NP line.

Original languageEnglish (US)
Pages (from-to)304-313
Number of pages10
JournalPharmacology Biochemistry and Behavior
Volume92
Issue number2
DOIs
StatePublished - Apr 1 2009

Keywords

  • Alcohol
  • Alcohol-non-preferring rats
  • Alcohol-preferring rats
  • Nucleus accumbens shell
  • Protein expression
  • Proteomics

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Pharmacology
  • Toxicology
  • Behavioral Neuroscience
  • Biological Psychiatry

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