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KMID : 0360320010330040343
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Journal of Korean Cancer Research Association
2001 Volume.33 No. 4 p.343 ~ p.349
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E - Cadherin Expression and p53 Alterations in Soft Tissue Sarcomas : A Possible Role in Epithelial Differentiation
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유진영/Jin Young Yoo
강석진/안웅식/김병기/Seok Jin Gang/Woong Shick Ahn/Byung Ki Kim
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Abstract
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PURPOSE: We investigated the expressions of E- Cadherin and p53 in soft tissue tumors to determine their significance in sarcoma development and/or progression and to assess their potential correlation with epithelial features.
MATERIALS AND METHODS: A total of 79 soft tissue sarcomas, including 10 tumors comprising epithelial components, were studied immunohistochemically in paraffin-embedded tissue sections. Further analysis was performed on 61 tumors by the application of a polymerase chain reaction technique and a direct sequence analysis procedure applied to exons 5 through 8 in the p53 gene.
RESULTS: E-Cadherin was expressed at the cell-cell boundaries in 8 (10%) tumors: 5 of grade 2 and 3 of grade 3. Of these, six (being 60% of the total of 10 tumors containing epithelial elements) contained and two did not contain histologic evidence of epithelial differentiation. Overexpression of p53 was detected in 26 (33%) samples, 7 of which demonstrated mutations in the p53 gene. No association was established between E-Cadherin immunoreactivities and p53 abnormalities. Tumor grade was found to be strongly correlated with p53 alterations (p=0.01) but not with E-Cadherin expression (p=0.09).
CONCLUSION: These data confirm a role for altered p53 in the pathogenesis of soft tissue sarcomas and suggest a possible role for E-Cadherin in the maintenance of epithelial architecture in these tumors regardless of p53 status.
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KEYWORD
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Soft tissue sarcoma, E - Cadherin, p53 gene, Epithelial differentiation,
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