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Related Experiment Videos

Skp2 protein expression in soft tissue sarcomas.

Andre M Oliveira1, Scott H Okuno, Antonio G Nascimento

  • 1Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
|February 15, 2003
PubMed
Summary

High Skp2 expression in soft tissue sarcomas correlates with increased cell proliferation and a poorer prognosis. This finding suggests Skp2 may be a valuable prognostic marker for these tumors.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • p45 S phase kinase-associated protein-2 (p45(skp2)) is an F-box protein crucial for the SCF(skp2) ubiquitin-ligase complex.
  • This complex regulates p27(kip1) (p27) degradation and G(1)-S cell cycle progression.
  • The prognostic significance of Skp2 in soft tissue sarcomas remains uninvestigated.

Purpose of the Study:

  • To investigate the expression and prognostic role of Skp2 in a large cohort of soft tissue sarcomas.
  • To correlate Skp2 expression with clinicopathologic features and patient survival.

Main Methods:

  • Immunohistochemical analysis of Skp2, p27, and Ki-67 in 182 soft tissue sarcoma cases (AJCC stages II and III).
  • Survival analyses were conducted using Kaplan-Meier and Cox regression models.

Related Experiment Videos

  • Correlation of protein expression with clinicopathologic variables and survival outcomes.

    • Main Results:

    • High Skp2 expression (>=10% cells) was observed in 37% of tumors and linked to high-grade histology and elevated Ki-67 proliferation index.
    • High Skp2 expression was not correlated with p27 expression.
    • Univariate and multivariate analyses identified high Skp2 expression as an independent predictor of decreased metastasis-free, disease-free, and overall survival.

    Conclusions:

    • Skp2 expression is associated with increased cell proliferation and a worse prognosis in soft tissue sarcomas.
    • The lack of inverse correlation with p27 suggests complex regulatory mechanisms or additional molecular events involved.
    • Skp2 may serve as a significant prognostic biomarker for soft tissue sarcomas.