Caveolin-1, E-cadherin and β-catenin in gastric carcinoma, precancerous tissues and chronic non-atrophic gastritis

Objective:To investigate the expressions of caveolin-1,E-cadherin and β-catenin in gastric carcinoma,precancerous gastric and chronic non-atrophic gastritis tissues,and evaluate the correlation of these expressions with the development of gastric cancer.Methods:The expressions of caveolin-1,E-cadherin and β-catenin were detected by biotin-streptavidin-peroxidase(SP) immunohistochemistry on 58 gastric cancer tissues,40 precancerous gastric tissues and 42 chronic non-atrophic gastritis tissues.The correlation between the expressions of caveolin-1,E-cadherin and β-catenin,and the clinicopathologic parameters of gastric cancer was analyzed retrospectively.Results:The positive rates of caveolin-1 and E-cadherin expressions in gastric carcinoma were significantly lower than precancerous gastric and chronic non-atrophic gastritis tissues(P<0.01).An abnormal rate of β-catenin expression in gastric carcinoma was higher than precancerous gastric and chronic non-atrophic gastritis tissues(P<0.01).Moreover,low expressions of caveolin-1,E-cadherin and β-catenin correlated with tumor size,depth of invasion,lymph node metastasis and TNM stage(P<0.05).The positive rates of caveolin-1 and E-cadherin expressions decreased(P<0.01),while an abnormal rate of β-catenin expression increased inversely,with the degree of atypical hyperplasia(P<0.01).Caveolin-1 expression correlated positively with E-cadherin(r=0.41,P<0.05).Caveolin-1(r= 0.36,P<0.05) and E-cadherin(r= 0.45,P<0.05) expressions negatively correlated with abnormal β-catenin expression.Conclusion: These results suggested that dysregulated expressions of caveolin‐1, E‐cadherin and β‐catenin correlated with the development of gastric cancer and its biological behavior.