Journal
EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY
Volume 269, Issue 4, Pages 1183-1188Publisher
SPRINGER
DOI: 10.1007/s00405-011-1892-4
Keywords
Laryngeal squamous cell carcinoma (LSCC); beta-Catenin; E-Cadherin; Wnt signaling
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Abnormal Wnt signaling and impaired cell-cell adhesion due to abnormal E-cadherin and beta-catenin function have been implicated in many cancers, but have not been fully explored in laryngeal squamous cell carcinoma. In this study, beta-catenin cellular location and E-cadherin expression levels were analyzed in 16 laryngeal squamous cell carcinomas (LSCCs) (9 glottic and 7 supraglottic) and 11 samples of non-tumoral inflammatory larynx tissue, using immunohistochemical methods. All non-tumoral tissues showed equally strong membranous expression of beta-catenin, while cytoplasmic expression was found in only 3 of the 11 samples. By contrast, whereas 8/9 glottic LSCCs exhibited only membranous expression of beta-catenin, 6/7 supraglottic LSCCs displayed both membranous and cytoplasmic expression (p = 0.003). Strong E-cadherin staining was observed in 9/11 non-tumoral tissues and 7/9 glottic LSCCs, whereas 4/7 supraglottic LSCCs exhibited weak expression. Reduced membrane expression of E-cadherin and cytoplasmic retention of beta-catenin in supraglottic LSCC seems to be related with more aggressive biological behavior which has been described in clinical studies. Further research is required to clarify the involvement of beta-catenin in the mechanism associated with malignant transformation in laryngeal tissues.
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