Abstract.
Modulation of striatal dopamine (DA) release by acute or repeated cocaine treatment was studied in the nucleus accumbens and caudate-putamen of alcohol-preferring (AA, Alko Alcohol) and alcohol-avoiding (ANA, Alko Non-Alcohol) rats. Cocaine (5–10 mg/kg i.p.) was administered daily for 4 days and the concentrations of extracellular DA measured by in vivo microdialysis on days 1 and 4 in the freely moving rats. The first administration of cocaine increased DA concentration similarly in rats of both lines in both the nucleus accumbens and caudate-putamen. On the 4th day, the effect of cocaine was significantly larger in the nucleus accumbens of AA than in that of ANA rats, whereas no such enhanced effect of cocaine was found in the caudate-putamen of either line. The results suggest that mesolimbic DA release in response to cocaine is sensitized more readily in AA than in ANA rats, which would not only render the former more susceptible to alcohol, but to other drugs of abuse, and might explain our previous findings that AA rats are more susceptible to psychomotor sensitization than ANA rats.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Electronic Publication
Rights and permissions
About this article
Cite this article
Mikkola, J., Honkanen, A., Petteri Piepponen, T. et al. Effects of repeated cocaine treatment on striatal dopamine release in alcohol-preferring AA and alcohol-avoiding ANA rats. Naunyn-Schmied Arch Pharmacol 363, 209–214 (2001). https://doi.org/10.1007/s002100000367
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s002100000367