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Assessing Cellular Stress and Inflammation in Discrete Oxytocin-secreting Brain Nuclei in the Neonatal Rat Before and After First Colostrum Feeding
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Oxytocin and Steroid Actions.

Gustav F Jirikowski1, Scott D Ochs2, Jack D Caldwell2

  • 1Inst. Anatomy II, Jena University Hospital, Jena, Germany. Gustav.Jirikowski@med.uni-jena.de.

Current Topics in Behavioral Neurosciences
|August 17, 2017
PubMed
Summary
This summary is machine-generated.

Steroid hormones like estradiol significantly influence oxytocin production and release in the brain. Rapid steroid actions may involve membrane receptors and binding proteins, not just nuclear pathways.

Keywords:
Gonadal steroid hormonesNeuroendocrine regulationNuclear receptorsSteroid binding globulinsStress response

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Area of Science:

  • Neuroendocrinology
  • Molecular Endocrinology

Background:

  • Oxytocin biosynthesis and secretion are regulated by steroid hormones.
  • Estradiol, corticosterone, and vitamin D are key steroid regulators.
  • Steroids' lipophilic nature allows blood-brain barrier penetration for central effects.

Purpose of the Study:

  • To investigate the mechanisms of steroid hormone action on oxytocin-producing neurons.
  • To explore the role of non-genomic pathways in steroid-mediated neuroendocrine control.

Main Methods:

  • Analysis of steroid receptor expression in oxytocinergic neurons.
  • Investigation of enzymes involved in local steroid metabolism.
  • Identification of steroid-binding proteins in oxytocin circuitry.

Main Results:

  • Oxytocinergic neurons often lack classical nuclear steroid receptors.
  • These neurons express proteins suggesting membrane-associated steroid receptors.
  • Oxytocin neurons possess enzymes for intrinsic steroid metabolism and produce steroid-binding globulins.

Conclusions:

  • Rapid steroid hormone effects on oxytocin neurons likely involve membrane receptors and binding proteins.
  • Non-genomic pathways may mediate steroid actions, impacting neuroendocrine and behavioral regulation.
  • These mechanisms are crucial for neuroendocrine regulation, reproductive behaviors, and stress response.