Interleukin 6 modulates lnterleukin-1- and stress-induced activation of the hypothalamic-pituitary-adrenal axis in male rats

Daohong Zhou, Nola Shanks, Steven E. Riechman, Ruomei Liang, Alexander W. Kusnecov, Bruce S. Rabin

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

This study examined the interaction between interleukin 6 (IL-6) and IL-1 and between IL-6 and stress on the activation of the hypothalamic-pituitary-adrenal (HP A) axis. Coadministration of IL-6 (100 ng/rat) with IL-1 (20 or 100 ng/ rat) resulted in synergistic stimulation of the HPA axis, as determined by increased plasma levels of ACTH and corticosterone (CORT) which were greater in rats that received both cytokines than in rats receiving either cytokine alone. Concomitant administration of IL-6 (100 ng/rat) with exposure to a novelty stressor also synergistically stimulated the activation of the HPA axis, as IL�6-treated rats subjected to novelty stress had greater increases in plasma levels of ACTH and CORT than vehicle-treated rats exposed to novelty stress or rats receiving IL-6 alone. However, concomitant administration of IL-6 (100 ng/rat) did not significantly affect restraint stress induced elevation of plasma levels of ACTH and CORT, although IL-6 tended to prolong restraint stress induced elevation of plasma levels of CORT. These findings indicate a modulatory role for IL-6 stimulated HPA axis activity in response to IL-1 or a novelty psychological stressor, but not for restraint stress.

Original languageEnglish (US)
Pages (from-to)227-236
Number of pages10
JournalNeuroendocrinology
Volume63
Issue number3
DOIs
StatePublished - 1996
Externally publishedYes

Keywords

  • Adrenal steroids
  • Corticotropin
  • Interleukins
  • Neuroimmune interactions
  • Stress

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Endocrine and Autonomic Systems
  • Cellular and Molecular Neuroscience

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