alexa Modeling binge-like ethanol drinking by peri-adolescent and adult P rats.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Bell RL, Rodd ZA, Smith RJ, Toalston JE, Franklin KM,

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Abstract Alcohol binge-drinking, especially among adolescents and young adults, is a serious public health concern. The present study examined ethanol binge-like drinking by peri-adolescent [postnatal days (PNDs 30-72)] and adult (PNDs 90-132) alcohol-preferring (P) rats with a drinking-in-the-dark-multiple-scheduled-access (DID-MSA) procedure used by our laboratory. Male and female P rats were provided concurrent access to 15\% and 30\% ethanol for three 1-h sessions across the dark cycle 5 days/week. For the 1st week, adolescent and adult female P rats consumed 3.4 and 1.6g/kg of ethanol, respectively, during the 1st hour of access, whereas for male rats the values were 3.5 and 1.1g/kg of ethanol, respectively. Adult intakes increased to ~2.0 g/kg/h and adolescent intakes decreased to ~2.5 g/kg/h across the 6 weeks of ethanol access. The daily ethanol intake of adult DID-MSA rats approximated or modestly exceeded that seen in continuous access (CA) rats or the selection criterion for P rats (≥5 g/kg/day). However, in general, the daily ethanol intake of DID-MSA peri-adolescent rats significantly exceeded that of their CA counterparts. BELs were assessed at 15-min intervals across the 3rd hour of access during the 4th week. Ethanol intake was 1.7 g/kg vs. 2.7 g/kg and BELs were 57 mg\% vs. 100mg\% at 15- and 60-min, respectively. Intoxication induced by DID-MSA in female P rats was assessed during the 1st vs. 4th week of ethanol access. Level of impairment did not differ between the 2 weeks (106 vs. 97 s latency to fall, 120 s criterion) and was significant (vs. naïve controls) only during the 4th week. Overall, these findings support the use of the DID-MSA procedure in rats, and underscore the presence of age- and sex-dependent effects mediating ethanol binge-like drinking in P rats. Copyright © 2011 Elsevier Inc. All rights reserved.
This article was published in Pharmacol Biochem Behav and referenced in Journal of Addiction Research & Therapy

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