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A cluster of differentially expressed signal transduction genes identified by microarray analysis in a rat genetic model of alcoholism

ABSTRACT

Analyzing gene expression patterns in genetic models of alcoholism may uncover previously unknown susceptibility genes, and point to novel targets for drug development. Here, we compared expression profiles in alcohol-preferring AA rats with the alcohol-avoiding counterpart ANA line, and unselected Wistar rats. Cingulate cortex, Nc. accumbens, amygdala and hippocampus of each line were analyzed using the Afymetrix RN U34 arrays and dChip 1.1 software. Analysis of line-specific expression revealed 48 differentially expressed genes between AA and ANA rats. Elevated hippocampal neuropeptide Y (NPY) was found in ANA rats in agreement with previous studies. A cluster of MAP-kinases indicating altered signal transduction was upregulated within the Nc. Accumbens of the AA line, and is of particular functional interest. Within the amygdala, a more loosely inter-related cluster of cytoskeleton-associated genes may point to structural abnormalities. The observed dysregulations may contribute to the alcohol-preferring phenotype.

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Acknowledgements

This work was funded by the European Community through a grant to the TARGALC consortium (QLRT-2001-01048) and the Swedish medical research council (K2001-21X-10872-08A, MH). We thank Siv Eriksson for excellent technical assistance, and Pelin Göllas-Kornas for help in preparing the manuscript.

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Arlinde, C., Sommer, W., Björk, K. et al. A cluster of differentially expressed signal transduction genes identified by microarray analysis in a rat genetic model of alcoholism. Pharmacogenomics J 4, 208–218 (2004). https://doi.org/10.1038/sj.tpj.6500243

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