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Updated: May 4, 2026

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Phosphocaveolin-1 enforces tumor growth and chemoresistance in rhabdomyosarcoma

Fiorella Faggi1, Stefania Mitola2, Guglielmo Sorci3

  • 1Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy ; Interuniversity Institute of Myology (IIM), Italy.

Plos One
|January 16, 2014
PubMed

Insights

Phosphorylated caveolin-1 (pCav-1) drives rhabdomyosarcoma progression and chemoresistance. Targeting pCav-1 offers a potential therapeutic strategy for this childhood cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Caveolin-1 (Cav-1) exhibits context-dependent roles as a tumor suppressor or oncogene.
  • Its phosphorylation status significantly influences its function in cancer.

Purpose of the Study:

  • To investigate the role of phosphorylated caveolin-1 (pCav-1) in rhabdomyosarcoma (RMS).
  • To evaluate pCav-1 as a potential therapeutic target for RMS.

Main Methods:

  • Studied Cav-1 phosphorylation at tyrosine 14 (pCav-1) in RMS cell lines and mouse cultures.
  • Utilized Src-kinase inhibitors and Cav-1 silencing to modulate pCav-1 levels.
  • Assessed effects on cell proliferation, migration, invasiveness, and chemoresistance in vitro.
  • Performed xenotransplantation studies in nude mice.

Main Results:

  • Cav-1 overexpression increased pCav-1 levels, enhancing ERK/AKT phosphorylation and promoting RMS cell proliferation, migration, invasiveness, and chemoresistance.
  • Src-kinase inhibition or Cav-1 silencing reduced pCav-1 and counteracted the malignant phenotype.
  • Xenotransplantation of Cav-1 overexpressing cells led to increased tumor growth.

Conclusions:

  • pCav-1 is a key mediator of RMS progression and chemoresistance.
  • Targeting pCav-1 presents a promising therapeutic avenue for rhabdomyosarcoma.

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