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The effects of perinatal fluoxetine treatment on the circadian system of the adult mouse

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Abstract

Rational

Depression is prevalent among women of childbearing age and is frequently treated with selective serotonin reuptake inhibitors (SSRIs). As some SSRIs, such as fluoxetine (Flx), can cross the placenta, it is possible that the neurodevelopment of the fetus may be affected, leading to altered behavior in adulthood.

Objectives

In this study, we examined the effects of perinatal Flx exposure on the subsequent expression of circadian rhythms in adult mice.

Methods

Dams were treated with 25 mg/kg/day Flx in their drinking water from embryonic day 15 to postnatal day 12. Circadian organization of wheel running rhythms and phase shifts to photic and non-photic stimuli were assessed in the offspring starting at 6 weeks of age.

Results

We found that perinatal Flx exposure led to larger light-induced phase advances (1.19 ± 0.51 vs. 0.55 ± 0.25 h), smaller phase advances to the serotonin agonist 8-OH-DPAT during the mid-subjective day (0.44 ± 0.15 vs. 0.70 ± 0.17 h), and a shorter free-running period in constant darkness (23.47 ± 0.13 vs. 23.64 ± 0.13 h).

Conclusions

These results suggest that perinatal exposure to SSRIs may have consequences for the functioning of the circadian system later in life.

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Acknowledgments

This work was supported by NSERC Discovery Grants to RHD and MCA, a CIHR Operating Grant to RHD, postgraduate fellowships from NSERC to VK and VMS, and postgraduate fellowships from Alberta Innovates Health Solutions and the Killam Trusts to VMS. The authors declare that they have no conflicts of interest.

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Authors and Affiliations

  1. Department of Psychology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada, T2N 1N4

    Veronika Kiryanova, Victoria M. Smith, Richard H. Dyck & Michael C. Antle

  2. Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada

    Richard H. Dyck

  3. Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada

    Michael C. Antle

  4. Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada

    Veronika Kiryanova, Victoria M. Smith, Richard H. Dyck & Michael C. Antle

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  1. Veronika Kiryanova
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  2. Victoria M. Smith
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  4. Michael C. Antle
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Correspondence to Michael C. Antle.

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Kiryanova, V., Smith, V.M., Dyck, R.H. et al. The effects of perinatal fluoxetine treatment on the circadian system of the adult mouse. Psychopharmacology 225, 743–751 (2013). https://doi.org/10.1007/s00213-012-2861-3

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  • DOI: https://doi.org/10.1007/s00213-012-2861-3

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