Hypermethylation and expression of HOXB6 gene in gastric cancer / 中华消化内镜杂志

ABSTRACT

Objective To detect the hypermethylation of HOXB6 gene in gastric cancer tissue and investigate the relationship between the gene expression and the clinics.Methods seven types of gastric cancer cell line and 73 cases of gastric cancer biopsy tissues were measured by combined bisulfite restriction analysis method.The gene expression and the re-expression after demethylation were detected by RT-PCR.Results Of 7 cell lines examined, 4 showed hypermethylation.The methylating status of HOXB6 was found to be correlated with loss of expression,which was restored by 5-aza-2＇-deoxycytidine treatment.We also find hypermethylation in 20/73(27.40%)case of cancer tissues but no one in non cancer tissue.Conclusion There are close relationship between hypermethylation and gene silencing in the HOXB6 gene of gastric cancer,There are also a gene re-expression after its demethylation.Hypermethylation of HOXB6 gene can be a tumor marker for gastric cancer diagnosis,and the agent of demethylation maybe a new antineoplastic drug.