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Brain Res Bull. 1992 Apr;28(4):629-31.

Fluoxetine shortens circadian period for wheel running activity in mice.

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  • 1Biopsychology Program, Skidmore College, Saratoga Springs, NY 12866.

Abstract

Fluoxetine is a potent and specific serotonin re-uptake inhibitor and an effective antidepressant drug. Male mice were treated with either fluoxetine (8 mg/kg body weight per day) or saline. Wheel running activity was monitored for 2 weeks in a 12:12 LD cycle followed by 2 weeks in constant darkness (DD). Fluoxetine significantly shortened free-running circadian period for wheel running activity (23.93 +/- 0.08 h for fluoxetine treated mice versus 24.17 +/- 0.07 h for saline treated mice; p less than 0.03). These results are consistent with a role for serotonin in the regulation of circadian period in mice.

PMID:
1617446
[PubMed - indexed for MEDLINE]
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