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Chronic administration of fluoxetine and pro-inflammatory cytokine change in a rat model of depression

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  • Yanxia Lu
  • Cyrus S Ho
  • Xin Liu
  • Anna N Chua
  • Wei Wang
  • Roger S McIntyre
  • Roger C Ho

Abstract

This study evaluated the chronic effects of fluoxetine, a commonly prescribed SSRI antidepressant, on the peripheral and central levels of inflammatory cytokines including IL-1β, IL-6, TNF-α and IL-17 over a 4-interval in a rat model of chronic mild stress (CMS) which resembles the human experience of depression. Twenty-four Sprague-Dawley rats were randomly assigned to CMS+vehicle (n = 9), CMS+fluoxetine (n = 9) and the control (n = 6) groups. Sucrose preference and forced swim tests were performed to assess behavioral change. Blood samples were collected on day 0, 60, 90 and 120 for measurement of cytokine levels in plasma. On day 120, the brain was harvested and central level of cytokines was tested using Luminex. Four months of fluoxetine treatment resulted in changes in the sucrose preference and immobility time measurements, commensurate with antidepressant effects. The CMS+vehicle group exhibited elevated plasma levels of IL-1β, IL-17, and TNF-α on day 60 or 120. Rats treated with fluoxetine demonstrated lower IL-1β in plasma and brain after 90 and 120-day treatment respectively (p

Suggested Citation

  • Yanxia Lu & Cyrus S Ho & Xin Liu & Anna N Chua & Wei Wang & Roger S McIntyre & Roger C Ho, 2017. "Chronic administration of fluoxetine and pro-inflammatory cytokine change in a rat model of depression," PLOS ONE, Public Library of Science, vol. 12(10), pages 1-14, October.
    • Handle: RePEc:plo:pone00:0186700
    DOI: 10.1371/journal.pone.0186700
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