DNMT3B Expression Might Contribute to Abnormal Methylation of RASSF1A in Lager Colorectal Adenomatous Polyps. (1st October 2020)

• Record Type: Journal Article
• Authors: Meng, Xianmei; Liu, Na; Jia, Yanbin; Gong, Kerui; Zhang, Jingjie; Zhang, Wei; Shao, Guo; Dang, Tong
• Other Names: Brunetti Oronzo Academic Editor.
• Is Part Of: Gastroenterology research and practice. Volume 2020(2020)
• Publication Date: 2020-10-01
• Subjects: Gastroenterology -- Periodicals; Digestive organs -- Diseases -- Periodicals; 616.33005
• DOI: 10.1155/2020/1798729
• Languages: English
• ISSNs: 1687-6121

Abstract

Abstract : Background . It is pretty well known that DNA methyltransferases (DNMTs) are actively involved in abnormal cell growth. The goal of the current study is to explore the correlation between DNMT expression and colorectal adenomatous polyps (CAPs). Method . Twenty pairs of CAP samples with a diameter ≥ 10 mm and corresponding normal colorectal mucosa (NCM) tissues from patients were used in the present study. The expression levels and activity of DNA methyltransferases (DNMTs) were measured in the CAP tissues. The global methylation and the promoter methylation level of 3 kinds of tumour suppressor gene were detected. Results . mRNA and protein levels of DNMT3B were found to be elevated in the CAP tissues compared with the control tissue. Additionally, the methylation of long interspersed nuclear elements-1 ( LINE-1/L1 ) was decreased in the CAP tissue. Furthermore, methylation of the promoter of a tumour suppressor gene Ras association domain family 1A ( RASSF1A ) was increased in the CAP tissues, while the mRNA levels of RASSF1A were decreased. Conclusions . These results suggest that the overexpression of DNMT3B may contribute to a role in the genesis of CAPs through the hypomethylation of chromosomes in the whole cell and promoter hypermethylation of RASSF1A .