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Updated: Jun 29, 2025

Stimulation of Notch Signaling in Mouse Osteoclast Precursors
08:01

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

Published on: February 28, 2017

7.9K

Nodal negatively regulates osteoclast differentiation by inducing STAT1 phosphorylation

Jung Ha Kim1,2, Kabsun Kim1, Inyoung Kim1

  • 1Department of Pharmacology, Chonnam National University Medical School, Gwangju, South Korea.

Journal of Cellular Physiology
|April 5, 2024
PubMed

Insights

Nodal, a transforming growth factor beta (TGF-β) superfamily member, inhibits osteoclast differentiation by regulating key genes via STAT1 activation. This finding reveals Nodal

Area of Science:

  • Bone Biology and Endocrinology
  • Cellular and Molecular Biology
  • Developmental Biology

Background:

  • Members of the transforming growth factor beta (TGF-β) superfamily are crucial regulators of bone cell activity.
  • The specific role of Nodal, a TGF-β superfamily member, in osteoblasts and osteoclasts remains uncharacterized.

Purpose of the Study:

  • To investigate the function of Nodal in osteoblast and osteoclast differentiation.
  • To elucidate the molecular mechanisms underlying Nodal's effects on bone cells.

Main Methods:

  • Analysis of Nodal's effect on osteoblast and osteoclast differentiation in vitro.
  • Gene expression profiling of pro- and anti-osteoclastogenic factors.
  • Investigation of the role of Signal Transducer and Activator of Transcription 1 (STAT1) signaling pathway.
  • In vivo assessment of Nodal's impact on RANKL-induced bone loss.

Main Results:

  • Nodal does not affect osteoblast function but significantly inhibits osteoclast differentiation.
  • Nodal downregulates pro-osteoclastogenic genes (c-fos, Nfatc1, Blimp1) and upregulates anti-osteoclastogenic genes (Bcl6, Irf8).
  • Nodal activates STAT1 in osteoclast precursors, and STAT1 inhibition abrogates Nodal's inhibitory effect.
  • Nodal-mediated inhibition of osteoclast differentiation reduces RANKL-induced bone loss in vivo.

Conclusions:

  • Nodal negatively regulates osteoclast differentiation through STAT1 activation, impacting key gene expression.
  • Nodal plays a protective role against excessive bone resorption and associated bone loss.
Keywords:
NodalSTAT1TGF‐βosteoblastosteoclast

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