Long-term exposure to a sweetened alcoholic solution does not alter genetic aversion to ethanol in Sardinian alcohol-nonpreferring (sNP) rats.
Results of a recent investigation revealed that selectively bred Indiana ethanol-nonpreferring (NP) rats could be "environmentally" conditioned to consume high amounts of ethanol. Specifically, a long-term exposure to a sucrose-plus-ethanol solution resulted, when sucrose was faded out, in an ethanol intake that was equivalent to that recorded in the counterpart ethanol-preferring (P) rats. The current study was designed to extend the above investigation to the selectively bred Sardinian alcohol-nonpreferring (sNP) rats. To this aim, rats of the sNP and Sardinian alcohol-preferring (sP) lines were exposed to a 108-day sucrose-fading procedure, which was virtually identical to that previously used with NP and P rats. Results indicated that intake of the sucrose-plus-ethanol solution in sNP rats was maintained predominantly by sucrose, as negligible intakes of ethanol were observed when sucrose was faded out. In contrast, sP rats maintained high levels of ethanol intake both during and after the induction procedure. These results support the suggestion that an environmental manipulation such as a long-term exposure to a sucrose-fading procedure did not overcome the genetically determined predisposition to avoid ethanol in sNP rats.
Brunetti
Giuliana
G
Neuroscienze S.c.a r.l., I-09123 Cagliari, Italy.
Serra
Salvatore
S
Vacca
Giovanni
G
Lobina
Carla
C
Curreli
Tiziana
T
Carai
Mauro A M
MA
Colombo
Giancarlo
G
Gessa
Gian Luigi
GL
D000428:Alcohol Drinking / Q000235:genetics* / Q000523:psychology*; D000818:Animals; D002492:Central Nervous System Depressants / Q000097:blood / Q000494:pharmacology*; D004326:Drinking / Q000187:drug effects; D000431:Ethanol / Q000097:blood / Q000494:pharmacology*; D008297:Male; D051381:Rats; D013395:Sucrose / Q000494:pharmacology; D013649:Taste / Q000187:drug effects / Q000502:physiology
D002492:Central Nervous System Depressants; D000431:Ethanol; D013395:Sucrose