Abstract：
:Sardinian ethanol-preferring (sP), non-preferring (sNP), and Wistar rats show similar dopaminergic response to vanilla sugar consumption in nucleus accumbens shell (NAcS) and medial prefrontal cortex (mPFC), and similarly learn a vanilla sugar-sustained appetitive behavior. In this study we investigated whether in satiated sP, sNP, and Wistar rats vanilla sugar would also elicit a serotonergic response in NAcS and mPFC, and whether in these areas voluntary ethanol consumption would elicit dopaminergic and/or serotoninergic responses. In the NAcS, all rats showed similar serotonin increases in response to the two meals and similar development of rapid habituation. In the mPFC, Wistar and sNP rats showed similar serotonin increases after two vanilla sugar meals, while sP rats, which had low serotonin basal levels, did not show a serotonergic response. When presented with a 10% ethanol solution, Wistar and sP rats rapidly consumed it, while sNP rats did not. In the NAcS, Wistar and sP rats presented dopamine and serotonin increases in response to ethanol. However, while Wistar rats showed habituation in their response, sP rats did not. In the mPFC, ethanol induced similar dopamine increases in Wistar and sP rats; serotonin increases were observed only in Wistar rats. In conclusion, all three lines showed increased serotonin release in response to palatable food, but they profoundly differed in their response to ethanol. In fact, only Wistar and sP rats drank ethanol, Wistar rats showed a monoaminergic response similar to that obtained after palatable food, while sP rats did not develop habituation, suggesting that they perceived ethanol as a more relevant stimulus.
journal_name
Brain Resjournal_title
Brain researchauthors
De Montis MG,Grappi S,Gambarana C,Leggio B,Nanni G,Scheggi S,Tagliamonte Adoi
10.1016/j.brainres.2004.01.043subject
Has Abstractpub_date
2004-04-23 00:00:00pages
18-27issue
1eissn
0006-8993issn
1872-6240pii
S0006899304001635journal_volume
1006pub_type
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