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Updated: Jun 25, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors
08:01

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

Published on: February 28, 2017

Notch signaling contributes to the pathogenesis of human osteosarcomas

Feyza Engin1, Terry Bertin, Ou Ma

  • 1Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.

Human Molecular Genetics
|February 21, 2009
PubMed

Insights

Notch signaling drives osteosarcoma growth. Inhibiting Notch signaling reduced tumor cell proliferation and tumor growth in preclinical models, suggesting a potential therapeutic strategy for this mesenchymal tumor.

Area of Science:

  • Oncology
  • Molecular Biology
  • Developmental Biology

Background:

  • Notch signaling is crucial for development and tissue maintenance.
  • Aberrant Notch signaling is implicated in various cancers.
  • Its role in mesenchymal tumors like osteosarcoma is not well understood.

Purpose of the Study:

  • To investigate the role of Notch signaling in osteosarcoma pathogenesis.
  • To evaluate the therapeutic potential of Notch inhibition in osteosarcoma.

Main Methods:

  • Analysis of Notch pathway components and target genes in human osteosarcoma samples.
  • In vitro studies using gamma-secretase inhibitors and dominant-negative Mastermind-like protein (DN-MAML) to inhibit Notch signaling.
  • In vivo studies using human osteosarcoma xenografts in nude mice.
  • Transcriptional profiling of osteosarcomas from p53 mutant mice.

Main Results:

  • Human osteosarcoma cell lines and primary tumors exhibit elevated Notch signaling, target genes, and Osterix.
  • Notch inhibition significantly reduced osteosarcoma cell proliferation in vitro.
  • Inhibition of Notch signaling decreased tumor growth in vivo xenograft models.
  • Upregulation of Notch1 target genes (Hes1, Hey1) and Dll4 was confirmed in p53 mutant mouse osteosarcomas.

Conclusions:

  • Activated Notch signaling contributes to the development of human osteosarcomas.
  • Targeting Notch signaling presents a promising therapeutic avenue for osteosarcoma treatment.

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