Different trends of p53, MDM2 and p14ARF expression patterns in endometrialadenocarcinomas versus hyperplasia

Buchynska L.G.*, Nesina I.P., Kashuba E.V.

Summary. Aim: To study the expression of p53, MDM2, and p14^ARF in the highly, moderately and low differentiated endometrial adenocarcinomas, compared to hyperplasia. Material and Methods: Surgical material and the scrapes of endometrial cancer, glandular and atypical hyperplasia patients. Expression of р53, MDM2 and p14^ARF was evaluated by immunohistochemical method using respective monoclonal antibodies. Results: High p53 expression level is accompanied by decreased level of MDM2 expression in endometrial cancers. On contrary, in endometrial hyperplasia, there was clear connection between the expression levels of p53 and MDM2. We hypothesize that the high p53 and low MDM2 levels in endometrial cancers could arise due to the inhibition of transcriptional activity of p53 by its binding to estrogen receptors. Соnclusion: High p53 expression level with low MDM2 and p14^ARF levels may be the characteristic features of low differentiated endometrial carcinoma.