title: E-cadherin promoter hypermethylation induced by interleukin-1beta treatment or H. pylori infection in human gastric cancer cell lines.
abstract: Interleukin-1beta is up-regulated in the presence of Helicobacter pylori infection. H. pylori infection was associated with E-cadherin methylation. In this study, we examined if IL-1beta could induce promoter methylation of E-cadherin in human gastric cancer cell lines TMK-1, MKN-74 and MKN-7. Cells were treated with IL-1beta (0.025, 0.1, 0.25, 1.0, 2.5 ng/mL) for 6, 12 and 24h. Methylation status was determined by MSP and sequencing. The effects of IL-1beta or H.pylori on the cells, and after blockade with interleukin-1 receptor antagonist (IL-1ra) were tested. Promoter methylation of E-cadherin was induced in all three cells treated with IL-1beta or co-cultured with H. pylori. Treatment of IL-1ra could reverse the phenomena. Our study indicated that IL-1beta is an important step in mediating E-cadherin methylation.
authors.affiliation: Division of Gastroenterology and Hepatology, Department of Medicine, University of Hong Kong, Hong Kong.
authors.forename: Xuemin
authors.initials: X
authors.lastname: Qian
authors.forename: Camy
authors.initials: C
authors.lastname: Huang
authors.forename: Chi Hin
authors.initials: CH
authors.lastname: Cho
authors.forename: Wai Mo
authors.initials: WM
authors.lastname: Hui
authors.forename: Asif
authors.initials: A
authors.lastname: Rashid
authors.forename: Annie On On
authors.initials: AO
authors.lastname: Chan
mesh_terms: D001483:Base Sequence; D015820:Cadherins / Q000235:genetics*; D045744:Cell Line, Tumor; D004247:DNA / Q000235:genetics / Q000378:metabolism; D019175:DNA Methylation; D016481:Helicobacter Infections / Q000235:genetics* / Q000382:microbiology; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D053590:Interleukin 1 Receptor Antagonist Protein / Q000037:antagonists & inhibitors / Q000502:physiology; D053583:Interleukin-1beta / Q000494:pharmacology*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011401:Promoter Regions, Genetic; D013274:Stomach Neoplasms / Q000235:genetics* / Q000473:pathology
chemical_list: D015820:Cadherins; D053590:Interleukin 1 Receptor Antagonist Protein; D053583:Interleukin-1beta; D004247:DNA