Alcohol and Alcoholism Vol. 35, No. 2, pp. 139-144, 2000
© 2000 Medical Council on Alcoholism
EFFECT OF ADRENALECTOMY AND EXPOSURE TO CORTICOSTERONE ON ALCOHOL INTAKE IN ALCOHOL-PREFERRING AND ALCOHOL-AVOIDING RAT LINES
Department of Psychology, Göteborg University, Box 500 SE - 405 30 Göteborg, Sweden and
1 Department of Mental Health and Alcohol Research, National Public Health Institute, POB 719, FIN-00101, Helsinki, Finland
Received 15 May 1999; in revised form 20 September 1999; accepted 5 October 1999
The daily fluid intake of male rats of the alcohol-preferring (AA) and alcohol-avoiding (ANA) lines with simultaneous access to 10% (v/v) ethanol and water was determined during a baseline period (2 weeks), following adrenalectomy (1 week), and for 2 weeks following corticosterone treatment. The results showed that adrenalectomized AA rats decreased their ethanol intake compared to the sham-operated AA controls and that treatment with corticosterone restored the intake of ethanol to that observed during the baseline period. In contrast to the AA rats, there were no alterations in ethanol intake after adrenalectomy and following corticosterone replacement in the ANA rats. These results suggest that corticosterone stimulates ethanol intake in animals with pronounced high preference for ethanol.
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