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Related Experiment Video

Updated: May 6, 2026

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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The oxytocin-bone axis.

G Colaianni1, R Tamma, A Di Benedetto

  • 1Department of Basic Medical Science, Neuroscience and Sense Organs, Section of Human Anatomy and Histology, University of Bari, Bari, Italy.

Journal of Neuroendocrinology
|November 14, 2013
PubMed
Summary
This summary is machine-generated.

Oxytocin (OT) directly influences bone health by regulating bone-forming osteoblasts and bone-resorbing osteoclasts. Mice lacking OT or its receptor develop osteoporosis, highlighting OT's crucial role in maintaining skeletal homeostasis.

Keywords:
membrane/nuclearneuropetidesoestrogensoxytocinreceptors

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Area of Science:

  • Endocrinology
  • Bone Biology
  • Skeletal Homeostasis

Background:

  • Oxytocin (OT) is increasingly recognized for roles beyond its established functions.
  • Emerging evidence suggests a direct impact of OT on skeletal health.
  • Understanding OT's skeletal mechanisms is crucial for bone disease research.

Purpose of the Study:

  • To investigate the direct role of oxytocin (OT) in regulating skeletal homeostasis.
  • To elucidate the cellular and molecular mechanisms underlying OT's action on bone cells.
  • To determine the interplay between OT, estrogen, and bone remodeling.

Main Methods:

  • Utilized oxytocin (OT) and OT receptor (Oxtr) knockout (KO) mouse models.
  • Assessed skeletal parameters including vertebral and femoral trabecular volume.
  • Analyzed gene expression of osteoblast differentiation markers.
  • Investigated cellular mechanisms in osteoblasts (OBs) and osteoclasts (OCs) using signaling pathway analysis (NFkB, MAPK).

Main Results:

  • OT and Oxtr KO mice exhibited reduced bone mass and impaired osteoblast differentiation.
  • OT demonstrated dual effects on osteoclasts (OCs), promoting formation via NFkB/MAPK and inhibiting resorption.
  • Estrogen's bone-protective effects were partially dependent on the OT receptor (OXTR), involving non-genomic signaling via MAPK.
  • A functional OT autocrine-paracrine loop in bone was identified, modulated by estrogen.

Conclusions:

  • Oxytocin plays a critical role in maintaining skeletal homeostasis through direct actions on bone cells.
  • The OT signaling pathway is essential for normal bone remodeling and is influenced by estrogen.
  • Targeting the OT system presents a potential therapeutic avenue for osteoporosis and related bone disorders.