Objective To study the relationship between in situ telomerase activity and the expressin of bcl-2 and p53 proteins in human ovarian epithelial tumors(OETs), and explore their effect in pathogenesis of ovarian cystadenocarcinoma. Methods The telomerase activity of ovarian epithelial tumors was measured by in situ telomerase activity labeling (ISLT), and bcl-2 and p53 expression was detected by SP immunohistochemical method. Results ⑴The positive rates of telomerase in ovarian cystadenocarcinomas(OCAC), their surrounding ovarian tissues(SOT),borderline cystadenomas(BCA),and cystadenomas(CA)were 92 3%(24/26), 0(0/26), 42 8%(9/21) and 0(0/15) respectively, and the positive rate was significantly higher in OCAC than that in SOT, BCA and CA(P0 05); ⑵The positive rates of Bcl-2 in OCAC, SOT, BCA and CA were 65 38%(17/26), 0(0/26), 52 38%(11/21) and 26 66%(4/15) respectively, which were significantly higher in OCAC and BCA than those in SOT and CA(P0 05). Conclusion The results indicated that overexpression of bcl-2 protein may be related to telomerase activation, the telomerase activation induced by bcl-2 overexpression may result in malignant transformation of ovarian epithelials, and p53 mutation may not affect telomerase activity during ovarian cystadenocarcinogenesis.

ObjectiveTo investigate the expression of E-cadherin and β-catenin in the primary colorectal carcinoma and metastatic lymph nodes and it's clinical significance. MethodsImmunohistochemical analysis of Ecadherin and β-catenin was performed in colorectal mucosa( n =20 ,group A) ,colorectal carcinoma without metastasis ( n = 25, group B) and colorectal carcinoma with metastatic lymph nodes ( n = 39, group C) The expression of E-cadherin and β-catenin and the metastasis and prognosis of colorectal carcinoma were observed. ResultsThe strongly positive expression of E-cadherin in primaries of group C (5.1％ ) was obviously lower than in group B ( U = 2. 149,P =0. 032) ,whereas no statistic differences of the expression of E-cadherin between primaries and metastases of group C were observed(P =0.186). There was no difference of the expression of β-catenin between group B and group C,the same of primary colorectal carcinoma and self control lymph nodes of group C(P =0.235 and P =0. 715). There was positive correlation between membranous down regulation of E-cadherin and β-catenin in group C( r = 0.387 ,P =0.024) ,but no relationship was found in group B( r = 0.080 ,P = 0.723 ). ConclusionThe decreased membranous expression of E-cadherin in the colorectal carcinoma was correlated with lymph nodes metastasis, and was obviously related to membranous down regulation of β-catenin. There was no relevance between the expression of β-catenin and the lymph nodes metastasis of colorectal carcinoma.