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Study Says Even Fruit Flies are Alcoholics
"The flies choose to consume alcohol to intoxicating levels, they will do so even if alcohol is made unpalatable, and they relapse to drinking high levels of alcohol after being deprived of it," said Ulrike Heberlein of the University of California, San Francisco.
"Addiction is a purely human condition, but, surprisingly, flies show several key features of it," Heberlein added.
Heberlein says studying a model of alcoholism in a simple organism like the fruit fly may lead to a better understanding of the problem in humans.
In the study, researchers found that flies prefer to consume ethanol-containing food to regular food, and that the insects' preference increases over time.
The researchers showed that flies are attracted to the smell of the alcohol, but they actually don't like its taste.
Their attraction to alcohol isn't explained by the immediate sensory experience of it, or by its calories. Nevertheless, flies self-administer ethanol to intoxicating levels.
They will put aside their aversion to particular tastes or smells in order to consume it, and they will rapidly return to high levels of ethanol consumption after a period of imposed abstinence.
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