Different blood acetaldehyde concentration following ethanol administration in a newly developed high alcohol preference and low alcohol preference rat model system.

A significant difference in blood-acetaldehyde concentration was observed between high alcohol-preference (HAP) rats and low alcohol-preference (LAP) rats, newly developed different alcohol preference lines. This difference of acetaldehyde accumulation may be due to cytosolic aldehyde dehydrogenase (ALDH1) polymorphism, which has been reported previously. As the doses of ethanol we employed are higher than that of voluntary drinking, there may be little direct relationship between acetaldehyde accumulation and alcohol preference. We suggest therefore that the ALDH1 polymorphism is associated with alcohol preference in HAP/LAP lines through some other unidentified mechanism.

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