Immunoreactive GnRH type I receptors in the mouse and sheep brain

Asher J. Albertson, Amy Navratil, Mallory Mignot, Laurence Dufourny, Brian Cherrington, Donal C. Skinner

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Gonadotropin Releasing Hormone-I (GnRH) has been implicated in an array of functions outside the neuroendocrine reproductive axis. Previous investigations have reported extensive GnRH binding in numerous sites and this has been supported by in situ hybridization studies reporting GnRH receptor mRNA distribution. The present study on mice and sheep supports and extends these earlier investigations by revealing the distribution of cells immunoreactive for the GnRH receptor. In addition to sites previously shown to express GnRH receptors such as the hippocampus, amygdala and the arcuate nucleus, the improved resolution afforded by immunocytochemistry detected cells in the mitral cell lay of the olfactory bulb as well as the central grey of the mesencephalon. In addition, GnRH receptor immunoreactive neurons in the hippocampus and mesencephalon of the sheep were shown to colocalize with estrogen receptor β. Although GnRH may act at some of these sites to regulate reproductive processes, evidence is accumulating to support an extra-reproductive role for this hypothalamic decapeptide.

Original languageEnglish
Pages (from-to)326-333
Number of pages8
JournalJournal of Chemical Neuroanatomy
Volume35
Issue number4
DOIs
StatePublished - Jul 2008

Keywords

  • Amygdala
  • Arcuate nucleus
  • Central grey
  • Nucleus accumbens
  • Olfactory bulb
  • Preoptic area
  • Red nucleus

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