Fluoxetine Modulates the Circadian Biological Clock via Phase Advances of Suprachiasmatic Nucleus Neuronal Firing

Apr 25, 2006Biological psychiatry

Fluoxetine shifts the body's internal clock by advancing nerve activity in the brain's time-keeping center

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Abstract

Fluoxetine (10 microm) induced significant phase advances in circadian rhythms when combined with L-tryptophan (0.5 microm).

  • Serotonin is known to influence circadian rhythms, suggesting a possible link with SSRIs.
  • Extracellular recordings from suprachiasmatic nucleus neurons were used to assess circadian activity changes.
  • Robust phase advances in circadian rhythms were observed following fluoxetine treatment.
  • The presence of L-tryptophan was necessary to maintain serotonin levels for these effects.

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