Polymerase chain reaction analyses of DNA isolated from several endometrial carcinomas were negative for (14;18) translocation involving the bcl-2 gene.
Bcl-2 is closely correlated with favorable prognostic factors and inversely associated with p53 protein accumulation in endometrial carcinomas: immunohistochemical and polymerase chain reaction/loss of heterozygosity findings.
To investigate the relationship between the sensitivity to apoptosis and the expression of the bcl-2 family genes, we set up a model system consisting of four human endometrial carcinoma cell lines.
Despite the fact that the amounts of Bcl-2, Bax and Bcl-x(L) proteins in the neoplastic population were not significantly differently distributed according to the clinicopathological features of the patients, the differences observed between normal and neoplastic samples suggest that these proteins may play a role in endometrial carcinoma: long-term follow-up studies will be required to confirm this hypothesis.
We assessed the protein expression levels of bcl-2, bax, bcl-xL, and bcl-xS in a group of 51 endometrial cancers and 8 normal samples as well as in 59 cervical neoplasms and in 15 normal cervical tissues.
Insulin-like growth factor-I receptor and PTEN protein expression in endometrial carcinoma. Correlation with bax and bcl-2 expression, microsatellite instability status, and outcome.
To test this hypothesis, we treated endometrial cancer cells (Ishikawa cell line) with quercetin, and cell proliferation, expression of growth signal genes (EGF, VEGF, and TGF-alpha), cell cycle genes (p53, p21, p73, and cyclin D1), and apoptosis-related genes (bcl-2 and bax) were analyzed.
Phenotypic and molecular variables (ploidy, proliferating cell nuclear antigen, MIB-1, p53, HER-2/neu, and bcl-2) were analyzed in preoperative specimens from 82 patients with endometrial cancer who had lymph nodes dissected.
Our results indicated that ursolic acid induced apoptotic processes in these poorly differentiated endometrial cancer cells occurs through mechanisms involving mitochondrial pathways and Bcl-2 family proteins.
Except for ER, there must be other binding location of estrogen in endometrial cancer cells, and the nongenomic effects of estrogen initiated from plasma membrane by E2-BSA cannot lead to transcriptional effect of Bcl-2 expression.
These results indicate that Pax2 expression is related to HEC tumor biology with the increased expression of Pax2 correlated to malignancy. pax2 siRNA down-regulates Pax2 expression and inhibits tumorigenesis of HEC in nude mice, possibly due to cell apoptosis and the inhibition of tumor proliferation induced by down-regulation of Bcl-2.
Nude mice with xenografted implants of human EC HEC-1-B cells were treated with valproic acid (VPA) and decitabine (DAC) and evaluated for tumor growth, CDH1 and Bcl-2 mRNA levels.
Bcl-2 mRNA and protein expression was increased in cisplatin-resistant endometrial cancer cell lines (KLE and HEC-1-A), but not in cisplatin-sensitive cell line (Ishikawa).
Compared with the adjacent normal tissues, miR-29b expression was down-regulated, the mRNA and protein expressions of VEGFA, ERK, Akt, mTOR and Bcl-2 were up-regulated, and MVD expression was increased in the EC tissues.