Published online Dec 31, 2005.
https://doi.org/10.4048/jbc.2005.8.4.157
Loss of Heterozygosity of E-Cadherin Gene and Protein Expression in Invasive Ductal Carcinomas
Abstract
Purpose
The E-cadherin gene, located on chromosome 16q22, may play principal roles in cell adhesion with the loss of E-cadherin expression leading to a propensity for a great number of malignant properties. The loss of heterozygosity (LOH) on 16q22 has rarely been studied in invasive ductal carcinomas. Our obJectives were to evaluate the LOH of E-cadherin and the protein expression in invasive ductal carcinomas and their correlation with various clinicopathoklgical factors.
Methods
The LOH analysis was performed using polymerase chain reactions with three polymorphk microsatellite markers (0165419, 01653106 and 0165498) in 50 surgically resected tumors and their non-tumorous counterparts. The E-cadherin protein expression was studied using immunohistochemi stry.
Results
The LOH and loss of protein expression were detected in 54% and 46% of the tumors, respectively. There was no LOH or protein loss detected in the non-tumor lesions. The LOH results were well correlated with the tumor size and lymph node metastasis. The protein loss results were well correlated with tumor histological grade. No correlation was found between LOH and protein loss.
Conclusion
These results suggest that the LOH of E-cadherin may be associated with tumor metastasis and tumor progression and E-cadherin protein klss may be related with the dedifferentiation in some portions of invasive ductal carcinomas. We propose the LOH of E-cadherin and protein loss may contribute to tumor progression by independent mechanism
