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Updated: Jun 24, 2026

A Preclinical Mouse Model of Osteosarcoma to Define the Extracellular Vesicle-mediated Communication Between Tumor and Mesenchymal Stem Cells
11:15

A Preclinical Mouse Model of Osteosarcoma to Define the Extracellular Vesicle-mediated Communication Between Tumor and Mesenchymal Stem Cells

Published on: May 6, 2018

Caveolin-1 reduces osteosarcoma metastases by inhibiting c-Src activity and met signaling

Lara Cantiani1, Maria Cristina Manara, Cinzia Zucchini

  • 1Laboratory of Oncology Research, Rizzoli Orthopaedic Institute, Italy.

Cancer Research
|August 19, 2007
PubMed

Insights

Caveolin-1 (Cav-1) is down-regulated in osteosarcoma, promoting cancer progression. Restoring Cav-1 levels suppressed tumor malignancy and metastasis, highlighting its oncosuppressor role.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Caveolin-1 (Cav-1) is highly expressed in normal osteoblasts.
  • Osteosarcoma progression involves osteoblast transformation and altered Cav-1 expression.

Purpose of the Study:

  • To investigate the role of Cav-1 as an oncosuppressor in human osteosarcoma.
  • To determine the relationship between Cav-1 expression, osteosarcoma progression, and patient survival.

Main Methods:

  • Analysis of Cav-1 expression in osteosarcoma tissues and cell lines.
  • In vitro studies assessing the effects of Cav-1 overexpression on cell malignancy (growth, migration, invasion).
  • In vivo studies evaluating the impact of Cav-1 overexpression on metastatic ability.
  • Investigation of Cav-1's interaction with c-Src and c-Met tyrosine kinases.

Main Results:

  • Majority of primary osteosarcomas exhibit significantly lower Cav-1 levels than normal osteoblasts.
  • Osteosarcoma patients with Cav-1 levels similar to osteoblasts showed better overall survival.
  • Forced Cav-1 overexpression in osteosarcoma cells reduced anchorage-independent growth, migration, and invasion.
  • Cav-1 overexpression abrogated the metastatic potential of osteosarcoma cells in vivo.
  • Activated c-Src and c-Met tyrosine kinases were inhibited upon Cav-1 overexpression.

Conclusions:

  • Cav-1 acts as an oncosuppressor in human osteosarcoma.
  • Cav-1 down-modulation facilitates osteosarcoma progression by activating c-Src and Met signaling.
  • Targeting c-Src and Met pathways may improve the prognosis of metastatic osteosarcoma.

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