The Null Device

Happymouse

Scientists have created a mouse that's permanently happy. The mouse lacks the TREK-1 gene, which affects the transmission serotonin in the brain, and as such doesn't suffer from depression (which, presumably, normal mice do):
Mice without the TREK-1 gene ('knock-out' mice) were created and bred in collaboration with Dr. Michel Lazdunski, co-author of the research, in his laboratory at the University of Nice, France. "These 'knock-out' mice were then tested using separate behavioral, electrophysiological and biochemical measures known to gauge 'depression' in animals," says Dr. Debonnel. "The results really surprised us; our 'knock-out' mice acted as if they had been treated with antidepressants for at least three weeks."

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