Objectives: A level of DNA methylation plays an important role in regulation of cellular gene's expression. Estimation of DNA methylation level in endometrial neoplastic tissues compared to normal endometrial samples was the aim of this study.
Design: It was to be shown, that changes in methylation rate in promotory regions could lead to carcinogenesis in particular cell. Authors describe an analysis of DNA methylation level in endometrial cancer tissues compared to DNA methylation level in normal or hyperplastic endometrium.
Material and methods: Endometrial samples from 88 women were collected. 56 of them were classified as adenocarcinoma, 20 as hyperplastic changes, 12 as normal endometrium-control group. DNA was isolated from tissues and than prepared to pm5dC and pdC. Than we performed a statistical analysis of results.
Results: The median DNA methylation level was significantly higher in neoplastic tissues than in normal endometrium. There was no difference between DNA methylation level between normal endometrium and hyperplastic changes.
Conclusions: Authors conclude that neoplastic endometrial tissues show high DNA methylation rate compared to normal or hyperplastic endometrium.