The expression of p53 and k-ras in gallbladder diseases / 中华普通外科杂志

ABSTRACT

Objective To detect the expression of p53 and k-ras in benign and malignant gallbladder diseases.Method ABC immunohistochemistry was used to detect p53 and k-ras protein in 101 specimens of chronic cholecystisis with cholecystolithiasis(group A),20 with cholesterol polyp(group B),22 with adenoma of gallbladder(group C),25 with primary gallbladder cancer(PGC)(in which there were 5 with atypical hyperplasia and carcinoma in situ)(group D)in this study.The relationship between p53 or/and k-ras expression and clinicopathologic data were analyzed.Resuit p53 and k-ras expressions were detected in both benign and malignant specimens,with the positive rates increasing from cholesterol polyp,to chronic cholecystisis to adenoma of gallbladder to carcinoma in situ and PGC(p53 was 62.8% in patients with benign lesions,and 92.0%in malignant lesion x2=8.16,P=0.004;k-ras was positive in 66.4% patients with benign lesions,and 92.0% in malignant lesions x2=6.65,P=0.01).In benign lesions the p53 expressions in group C was higher than that in group A and B(x2=6.90 and 6.02,P=0.009 and 0.014).There was higher expression of p53 in chronic chylecystisis with a history more than 10 years than those less than 10 years(80.0%vs.52.9%,x2=8.28,P=0.004).k-ras in cases less than 60 years old was higher than those after 60 years of age(70.4%vs.46.8%,x2=5.79,P=0.016).Conclusion The higher expression rate of p53 in cholecyst adenoma may predict carcinogenesis,while k-ras is negatively correlated with patients'age,which may bespeak the development of carcinoma in patients younger than 60 years old.