Aberrant Expression of β-catenin and Its Association with ΔNp63, Notch-1, and Clinicopathological Factors in Oral Squamous Cell Carcinoma

Overview

Journal Clin Oral Investig

Specialty Dentistry

Date 2011 Sep 2

PMID 21881870

Citations 12

Authors

Gokulan Ravindran

Halagowder Devaraj

Affiliations

Soon will be listed here.

Abstract

The present study focuses on the correlation between the expression pattern of β-catenin (component of Wnt signaling), ΔNp63 (proliferation marker), and Notch 1 (transmembrane receptor) in oral squamous cell carcinoma. The study also aims to investigate the interaction between β-catenin and ΔNp63 in oral cancer. Furthermore, we also analyzed the prognostic significance of β-catenin, ΔNp63, and Notch 1 in oral squamous cell carcinoma. Immunohistochemical analysis of β-catenin, ΔNp63, and Notch 1 were done in 62 cases of oral squamous cell carcinoma. Co-immunoprecipitation analysis was done to study the possible interaction between β-catenin and ΔNp63 in oral cancer. Kaplan-Meier method was used to estimate overall and disease-free survival, and the Log-rank test was used to compare the resulting curves. Statistically significant positive correlation was found between the localization of β-catenin and the expression of ΔNp63 (p = 0.001**, r (s) = 0.427), whereas, no significant association was found between the expression pattern of β-catenin and Notch 1. Interestingly, interaction between β-catenin and ΔNp63 was observed in oral carcinoma. Moreover, β-catenin and ΔNp63 may be related to worst survival in oral carcinoma. Statistically significant positive association between localization of β-catenin and expression of ΔNp63 suggests that they might have dependent roles in maintaining the proliferation of oral carcinoma cells. In addition, the downregulated expression of Notch 1 was related to invasion and differentiation status of oral carcinoma cells. Furthermore, β-catenin and ΔNp63 may be used as independent prognostic markers of oral carcinoma. On the other hand, interaction of β-catenin with ΔNp63 may be a key event in maintaining the proliferation of oral carcinoma cells. The present study indicates that β-catenin and ΔNp63 may be used as independent prognostic markers of oral carcinoma and the interaction of β-catenin with ΔNp63 may be a crucial event in regulating proliferation and differentiation of oral carcinoma cells, which may be used as a target for therapeutic implications.

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