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  • Title: Attenuation of the alcohol preference of C57BL/6 mice during chronic renal failure.
    Author: Gooderham PA, Gagnon RF, Gill K.
    Journal: J Lab Clin Med; 2004 May; 143(5):292-300. PubMed ID: 15122173.
    Abstract:
    The C57BL/6 inbred mouse strain is known for its strong, genetically determined preference for alcohol over water. In this study we examined the voluntary alcohol consumption (VAC) of C57BL/6 mice during chronic renal failure (CRF). Two weeks after the surgical induction of renal failure, CRF mice, together with normal and sham-operated control mice, were submitted to a standard 24-day VAC protocol. The mice were offered water for the first 6 days (period of acclimatization), alcohol (10% ethanol solution) for the next 4 days (period of forced alcohol exposure), and a choice between water and alcohol for the last 14 days (VAC period). The results (mean +/- SEM) obtained from the last 8 days of the VAC period were significantly different (P <.05) between CRF mice and the 2 control groups. As expected, CRF mice had a higher total fluid intake than did normal and sham-operated controls (9.5 +/- 0.2 vs 5.4 +/- 0.2 and 5.4 +/- 0.2 g/d). Surprisingly, despite their increased total fluid consumption, CRF mice nearly abolished their absolute alcohol intake compared with that of both control groups (3.2 +/- 0.5 vs 13.1 +/- 0.8 and 14.2 +/- 1.1 g alcohol/kg body wt/d). The resulting alcohol preference ratio (g alcohol/g total fluid) was markedly decreased in the CRF mice compared with that in both control groups (0.09 +/- 0.01 vs 0.62 +/- 0.03 and 0.64 +/- 0.05). We conclude that the innate alcohol preference of C57BL/6 mice is nearly abolished during CRF. Additional studies to clarify the mechanism of this striking change in drinking pattern are required, with special emphasis on the possible role of angiotensin II, which is involved in thirst regulation and known to reduce the alcohol consumption of normal alcohol-preferring rats.
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