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Related Experiment Videos

CD44 expression in soft tissue sarcomas.

N Kahara1, T Ozaki, T Doi

  • 1Department of Orthopedic Surgery, Faculty of Medicine, Okayamas University Medical School, Japan.

Virchows Archiv : an International Journal of Pathology
|August 5, 2000
PubMed
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Expression of CD44 variant isoforms, specifically CD44v6 or CD44v9, is linked to better metastasis-free survival in soft tissue sarcoma patients. These CD44 variants may serve as prognostic markers.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pathology

Background:

  • Alternative splicing of CD44 (a cell surface glycoprotein) generates various isoforms.
  • CD44 isoforms are implicated in cancer progression and prognosis across multiple tumor types.
  • The role of CD44 standard and variant isoforms in soft tissue sarcomas remains largely uncharacterized.

Purpose of the Study:

  • To investigate the expression patterns of CD44 standard (CD44H) and variant (CD44v) isoforms in a cohort of soft tissue sarcomas.
  • To determine the correlation between the expression of specific CD44 isoforms and metastasis-free survival rates (MFSR) in patients with soft tissue sarcoma.

Main Methods:

  • Immunohistochemical analysis was performed on 47 soft tissue sarcoma samples, including MFH, SS, MS, and LS.

Related Experiment Videos

  • Monoclonal antibodies targeting CD44H and CD44 variant exons (v3, v4, v5, v6, v7, v9, v10) were utilized.
  • Membranous expression patterns were analyzed, and associations with MFSR were statistically assessed.

    • Main Results:

    • CD44v3 and v7 were rarely expressed; CD44v10 was not detected in any samples.
    • CD44v4, v5, v6, and v9 were relatively common in soft tissue sarcomas.
    • CD44v6 expression was more prevalent in high-grade compared to low-grade tumors.
    • Expression of CD44v6 or CD44v9 showed a significant correlation with improved metastasis-free survival.

    Conclusions:

    • Specific CD44 variant isoforms, particularly CD44v6 and CD44v9, are expressed in soft tissue sarcomas.
    • The expression of CD44v6 and CD44v9 is associated with a favorable prognosis, indicated by higher metastasis-free survival.
    • These CD44 variant isoforms represent potential biomarkers for predicting outcomes in soft tissue sarcoma patients.